Pharmacy Retail/ Health Care Corporate/ Intersegment Consolidated In millions Services (1)(2) LTC (2) Benefits (2) Other Eliminations (2) Totals 2018: Revenues from customers $ 134,115 $ 83,989 $ 5,504 $ 4 $ (29,693 ) $ 193,919 Net investment income (3) 13  45 602  660 Total revenues 134,128 83,989 5,549 606 (29,693 ) 194,579 Operating income (loss) (4)(5) 4,699 620 276 (805 ) (769 ) 4,021 Depreciation and amortization 712 1,698 170 138  2,718 Additions to property and equipment 326 1,350 46 401  2,123 2017: Revenues from customers 130,596 79,398   (25,229 ) 184,765 Net investment income 5   16  21 Total revenues (7) 130,601 79,398  16 (25,229 ) 184,786 Operating income (loss) (4)(5)(7) 4,657 6,558  (936 ) (741 ) 9,538 Depreciation and amortization 712 1,651  116  2,479 Additions to property and equipment 311 1,398  340  2,049 2016: Revenues from customers 119,963 81,100   (23,537 ) 177,526 Net investment income 2   18  20 Total revenues (7) 119,965 81,100  18 (23,537 ) 177,546 Operating income (loss) (4)(5)(6)(7) 4,570 7,437  (900 ) (721 ) 10,386 Depreciation and amortization 714 1,642  119  2,475 Additions to property and equipment 295 1,732  252  2,279 _____________________________________________ (1) Total revenues of PSS include approximately $11.4 billion , $10.8 billion and $10.5 billion of Retail Co-Payments for 2018 , 2017 and 2016 , respectively. See Note 1 Significant Accounting Policies for additional information about Retail Co-Payments. (2) Intersegment eliminations relate to intersegment revenue generating activities that occur between PSS and RLS for 2018, 2017 and 2016. Effective November 28, 2018, intersegment eliminations also relate to intersegment revenue generating activities that occur between HCBS, PSS and/or RLS. (3) Corporate/Other segment net investment income for 2018 includes interest income of $536 million related to the proceeds of the $40 billion 2018 Notes. This amount is for the period prior to the close of the Aetna Acquisition, which occurred on November 28, 2018. (4) RLS operating income for 2018 , 2017 and 2016 includes $7 million , $34 million and $281 million , respectively, of acquisition-related integration costs. The integration costs in 2018 and 2017 are related to the acquisition of Omnicare. The integration costs in 2016 are related to the acquisitions of Omnicare and the pharmacy and clinic businesses of Target. RLS operating income for 2018 and 2017 also includes goodwill impairment charges of $6.1 billion related to the LTC reporting unit and $181 million related to the RxCrossroads reporting unit, respectively. In addition, RLS operating income for 2017 and 2016 includes $215 million and $34 million , respectively, of charges associated with store rationalization and asset impairment charges in connection with planned store closures related to the Companys enterprise streamlining initiative. RLS operating income for 2018 also includes a $43 million loss on impairment of long-lived assets primarily related to the impairment of property and equipment and an $86 million loss on the divestiture of the Companys RxCrossroads subsidiary. (5) Corporate/Other segment operating loss for 2018 , 2017 and 2016 includes $485 million , $40 million and $10 million , respectively, of divestiture and acquisition-related transaction and integration costs included in operating expenses in the consolidated statements of operations. The transaction and integration costs in 2018 are related to the acquisitions of Aetna and Omnicare. The transaction and integration costs in 2017 are related to the acquisitions of Aetna and Omnicare and the divestiture of RxCrossroads. The integration costs in 2016 are related to the acquisitions of Omnicare and the pharmacy and clinic businesses of Target. (6) PSS operating income for 2016 includes the reversal of an accrual of $88 million in connection with a legal settlement. (7) Amounts revised to reflect the reclassification of interest income from interest expense, net to net investment income within total revenues to conform with insurance company presentation which increased total revenues and operating income by $21 million and $20 million in 2017 and 2016, respectively.