corporate/other corporate/other includes certain unallocated costs of global staff functions ( including finance , risk , human resources , legal and compliance ) , other corporate expenses and unallocated global operations and technology expenses and income taxes , as well as corporate treasury , certain north america legacy consumer loan portfolios , other legacy assets and discontinued operations ( for additional information on corporate/other , see 201ccitigroup segments 201d above ) .at december 31 , 2018 , corporate/other had $ 91 billion in assets , an increase of 17% ( 17 % ) from the prior year .in millions of dollars 2018 2017 2016 % (  % ) change 2018 vs .2017 % (  % ) change 2017 vs .2016 . in millions of dollars                                             | 2018           | 2017               | 2016         | % (  % ) change2018 vs . 2017 | % (  % ) change2017 vs . 2016
net interest revenue                                               | $ 2254         | $ 2000             | $ 3045       | 13% ( 13 % )                  | ( 34 ) % (  % )              
non-interest revenue                                               | -171 ( 171 )   | 1132               | 2188         | nm                            | -48 ( 48 )                   
total revenues net of interest expense                             | $ 2083         | $ 3132             | $ 5233       | ( 33 ) % (  % )               | ( 40 ) % (  % )              
total operating expenses                                           | $ 2272         | $ 3814             | $ 5042       | ( 40 ) % (  % )               | ( 24 ) % (  % )              
net credit losses                                                  | $ 21           | $ 149              | $ 435        | ( 86 ) % (  % )               | ( 66 ) % (  % )              
credit reserve build ( release )                                   | -218 ( 218 )   | -317 ( 317 )       | -456 ( 456 ) | 31                            | 30                           
provision ( release ) for unfunded lending commitments             | -3 ( 3 )       | 2014               | -8 ( 8 )     | 2014                          | 100                          
provision for benefits and claims                                  | -2 ( 2 )       | -7 ( 7 )           | 98           | 71                            | nm                           
provisions for credit losses and for benefits and claims           | $ -202 ( 202 ) | $ -175 ( 175 )     | $ 69         | -15 ( 15 )                    | nm                           
income ( loss ) from continuing operations before taxes            | $ 13           | $ -507 ( 507 )     | $ 122        | nm                            | nm                           
income taxes ( benefits )                                          | -113 ( 113 )   | 19064              | -455 ( 455 ) | nm                            | nm                           
income ( loss ) from continuing operations                         | $ 126          | $ -19571 ( 19571 ) | $ 577        | nm                            | nm                           
income ( loss ) from discontinued operations net of taxes          | -8 ( 8 )       | -111 ( 111 )       | -58 ( 58 )   | 93                            | -91 ( 91 )                   
net income ( loss ) before attribution of noncontrolling interests | $ 118          | $ -19682 ( 19682 ) | $ 519        | nm                            | nm                           
noncontrolling interests                                           | 11             | -6 ( 6 )           | -2 ( 2 )     | nm                            | nm                           
net income ( loss )                                                | $ 107          | $ -19676 ( 19676 ) | $ 521        | nm                            | nm                            nm not meaningful 2018 vs .2017 net income was $ 107 million in 2018 , compared to a net loss of $ 19.7 billion in the prior year , primarily driven by the $ 19.8 billion one-time , non-cash charge recorded in the tax line in 2017 due to the impact of tax reform .results in 2018 included the one-time benefit of $ 94 million in the tax line , related to tax reform .for additional information , see 201csignificant accounting policies and significant estimates 2014income taxes 201d below .excluding the one-time impact of tax reform in 2018 and 2017 , net income decreased 92% ( 92 % ) , reflecting lower revenues , partially offset by lower expenses , lower cost of credit and tax benefits related to the reorganization of certain non-u.s .subsidiaries .the tax benefits were largely offset by the release of a foreign currency translation adjustment ( cta ) from aoci to earnings ( for additional information on the cta release , see note 19 to the consolidated financial statements ) .revenues decreased 33% ( 33 % ) , driven by the continued wind-down of legacy assets .expenses decreased 40% ( 40 % ) , primarily driven by the wind-down of legacy assets , lower infrastructure costs and lower legal expenses .provisions decreased $ 27 million to a net benefit of $ 202 million , primarily due to lower net credit losses , partially offset by a lower net loan loss reserve release .net credit losses declined 86% ( 86 % ) to $ 21 million , primarily reflecting the impact of ongoing divestiture activity and the continued wind-down of the north america mortgage portfolio .the net reserve release declined by $ 96 million to $ 221 million , and reflected the continued wind-down of the legacy north america mortgage portfolio and divestitures .2017 vs .2016 the net loss was $ 19.7 billion , compared to net income of $ 521 million in the prior year , primarily driven by the one-time impact of tax reform .excluding the one-time impact of tax reform , net income declined 69% ( 69 % ) to $ 168 million , reflecting lower revenues , partially offset by lower expenses and lower cost of credit .revenues declined 40% ( 40 % ) , primarily reflecting the continued wind-down of legacy assets and the absence of gains related to debt buybacks in 2016 .revenues included approximately $ 750 million in gains on asset sales in the first quarter of 2017 , which more than offset a roughly $ 300 million charge related to the exit of citi 2019s u.s .mortgage servicing operations in the quarter .expenses declined 24% ( 24 % ) , reflecting the wind-down of legacy assets and lower legal expenses , partially offset by approximately $ 100 million in episodic expenses primarily related to the exit of the u.s .mortgage servicing operations .also included in expenses is an approximately $ 255 million provision for remediation costs related to a card act matter in 2017 .provisions decreased $ 244 million to a net benefit of $ 175 million , primarily due to lower net credit losses and a lower provision for benefits and claims , partially offset by a lower net loan loss reserve release .net credit losses declined 66% ( 66 % ) , primarily reflecting the impact of ongoing divestiture activity and the continued wind-down of the north america mortgage portfolio .the decline in the provision for benefits and claims was primarily due to lower insurance activity .the net reserve release declined $ 147 million , and reflected the continued wind-down of the legacy north america mortgage portfolio and divestitures. .
Question: what were total operating expenses in 2018?

Read the following texts and table with financial data from an S&P 500 earnings report carefully.Based on the question-answer history (if provided), answer the last question. The answer may require mathematical calculation based on the data provided.
corporate/other corporate/other includes certain unallocated costs of global staff functions ( including finance , risk , human resources , legal and compliance ) , other corporate expenses and unallocated global operations and technology expenses and income taxes , as well as corporate treasury , certain north america legacy consumer loan portfolios , other legacy assets and discontinued operations ( for additional information on corporate/other , see 201ccitigroup segments 201d above ) .at december 31 , 2018 , corporate/other had $ 91 billion in assets , an increase of 17% ( 17 % ) from the prior year .in millions of dollars 2018 2017 2016 % (  % ) change 2018 vs .2017 % (  % ) change 2017 vs .2016 . in millions of dollars                                             | 2018           | 2017               | 2016         | % (  % ) change2018 vs . 2017 | % (  % ) change2017 vs . 2016
net interest revenue                                               | $ 2254         | $ 2000             | $ 3045       | 13% ( 13 % )                  | ( 34 ) % (  % )              
non-interest revenue                                               | -171 ( 171 )   | 1132               | 2188         | nm                            | -48 ( 48 )                   
total revenues net of interest expense                             | $ 2083         | $ 3132             | $ 5233       | ( 33 ) % (  % )               | ( 40 ) % (  % )              
total operating expenses                                           | $ 2272         | $ 3814             | $ 5042       | ( 40 ) % (  % )               | ( 24 ) % (  % )              
net credit losses                                                  | $ 21           | $ 149              | $ 435        | ( 86 ) % (  % )               | ( 66 ) % (  % )              
credit reserve build ( release )                                   | -218 ( 218 )   | -317 ( 317 )       | -456 ( 456 ) | 31                            | 30                           
provision ( release ) for unfunded lending commitments             | -3 ( 3 )       | 2014               | -8 ( 8 )     | 2014                          | 100                          
provision for benefits and claims                                  | -2 ( 2 )       | -7 ( 7 )           | 98           | 71                            | nm                           
provisions for credit losses and for benefits and claims           | $ -202 ( 202 ) | $ -175 ( 175 )     | $ 69         | -15 ( 15 )                    | nm                           
income ( loss ) from continuing operations before taxes            | $ 13           | $ -507 ( 507 )     | $ 122        | nm                            | nm                           
income taxes ( benefits )                                          | -113 ( 113 )   | 19064              | -455 ( 455 ) | nm                            | nm                           
income ( loss ) from continuing operations                         | $ 126          | $ -19571 ( 19571 ) | $ 577        | nm                            | nm                           
income ( loss ) from discontinued operations net of taxes          | -8 ( 8 )       | -111 ( 111 )       | -58 ( 58 )   | 93                            | -91 ( 91 )                   
net income ( loss ) before attribution of noncontrolling interests | $ 118          | $ -19682 ( 19682 ) | $ 519        | nm                            | nm                           
noncontrolling interests                                           | 11             | -6 ( 6 )           | -2 ( 2 )     | nm                            | nm                           
net income ( loss )                                                | $ 107          | $ -19676 ( 19676 ) | $ 521        | nm                            | nm                            nm not meaningful 2018 vs .2017 net income was $ 107 million in 2018 , compared to a net loss of $ 19.7 billion in the prior year , primarily driven by the $ 19.8 billion one-time , non-cash charge recorded in the tax line in 2017 due to the impact of tax reform .results in 2018 included the one-time benefit of $ 94 million in the tax line , related to tax reform .for additional information , see 201csignificant accounting policies and significant estimates 2014income taxes 201d below .excluding the one-time impact of tax reform in 2018 and 2017 , net income decreased 92% ( 92 % ) , reflecting lower revenues , partially offset by lower expenses , lower cost of credit and tax benefits related to the reorganization of certain non-u.s .subsidiaries .the tax benefits were largely offset by the release of a foreign currency translation adjustment ( cta ) from aoci to earnings ( for additional information on the cta release , see note 19 to the consolidated financial statements ) .revenues decreased 33% ( 33 % ) , driven by the continued wind-down of legacy assets .expenses decreased 40% ( 40 % ) , primarily driven by the wind-down of legacy assets , lower infrastructure costs and lower legal expenses .provisions decreased $ 27 million to a net benefit of $ 202 million , primarily due to lower net credit losses , partially offset by a lower net loan loss reserve release .net credit losses declined 86% ( 86 % ) to $ 21 million , primarily reflecting the impact of ongoing divestiture activity and the continued wind-down of the north america mortgage portfolio .the net reserve release declined by $ 96 million to $ 221 million , and reflected the continued wind-down of the legacy north america mortgage portfolio and divestitures .2017 vs .2016 the net loss was $ 19.7 billion , compared to net income of $ 521 million in the prior year , primarily driven by the one-time impact of tax reform .excluding the one-time impact of tax reform , net income declined 69% ( 69 % ) to $ 168 million , reflecting lower revenues , partially offset by lower expenses and lower cost of credit .revenues declined 40% ( 40 % ) , primarily reflecting the continued wind-down of legacy assets and the absence of gains related to debt buybacks in 2016 .revenues included approximately $ 750 million in gains on asset sales in the first quarter of 2017 , which more than offset a roughly $ 300 million charge related to the exit of citi 2019s u.s .mortgage servicing operations in the quarter .expenses declined 24% ( 24 % ) , reflecting the wind-down of legacy assets and lower legal expenses , partially offset by approximately $ 100 million in episodic expenses primarily related to the exit of the u.s .mortgage servicing operations .also included in expenses is an approximately $ 255 million provision for remediation costs related to a card act matter in 2017 .provisions decreased $ 244 million to a net benefit of $ 175 million , primarily due to lower net credit losses and a lower provision for benefits and claims , partially offset by a lower net loan loss reserve release .net credit losses declined 66% ( 66 % ) , primarily reflecting the impact of ongoing divestiture activity and the continued wind-down of the north america mortgage portfolio .the decline in the provision for benefits and claims was primarily due to lower insurance activity .the net reserve release declined $ 147 million , and reflected the continued wind-down of the legacy north america mortgage portfolio and divestitures. .
Question: what were total operating expenses in 2018?
