4 . SEGMENT INFORMATION The Company conducts business principally in five reporting segments including Commercial Lines, Personal Lines, Property &amp; Casualty Other Operations, Group Benefits and Hartford Funds, as well as a Corporate category. Over 95% of the Company's revenues are generated in the United States ("U.S."). The remaining revenues are generated in the United Kingdom, continental Europe and other international locations. The Companys reporting segments, as well as the Corporate category, are as follows: Commercial Lines Commercial Lines provides workers compensation, property, automobile, general liability, umbrella, professional liability, bond, marine, livestock and assumed reinsurance to businesses in the U.S. and internationally, along with a variety of customized insurance products and risk management services including professional liability, bond, surety, and specialty casualty coverages. Personal Lines Personal Lines provides standard automobile, homeowners and personal umbrella coverages to individuals across the U.S., including a special program designed exclusively for members of AARP. Property &amp; Casualty Other Operations Property &amp; Casualty Other Operations includes certain property and casualty operations, managed by the Company, that have discontinued writing new business and includes substantially all of the Companys asbestos and environmental exposures. Group Benefits Group Benefits provides employers, associations and financial institutions with group life, accident and disability coverage, along with other products and services, including voluntary benefits, and group retiree health. Hartford Funds Hartford Funds offers investment products for retail and retirement accounts and provides investment management and administrative services such as product design, implementation and oversight. This business also manages a portion of the mutual funds which support the variable annuity products within the life and annuity business sold in May 2018. Corporate The Company includes in the Corporate category discontinued operations related to the life and annuity business sold in May 2018, reserves for run-off structured settlement and terminal funding agreement liabilities, capital raising activities (including debt financing and related interest expense), transaction expenses incurred in connection with an acquisition, certain purchase accounting adjustments related to goodwill and other expenses not allocated to the reporting segments. Corporate also includes investment management fees and expenses related to managing third party business, including management of the invested assets of Talcott Resolution Life, Inc. and its subsidiaries ("Talcott Resolution"). In addition, Corporate includes a 9.7% ownership interest in the legal entity that acquired the life and annuity business sold in 2018. For further discussion of continued involvement in the life and annuity business sold, see Note 21 - Business Dispositions and Discontinued Operations of Notes to Consolidated Financial Statements. Financial Measures and Other Segment Information Certain transactions between segments occur during the year that primarily relate to tax settlements, insurance coverage, expense reimbursements, services provided, investment transfers and capital contributions. In addition, certain inter-segment transactions occur that relate to interest income on allocated surplus. Consolidated net investment income is unaffected by such transactions. Revenues For the years ended December 31, 2019 2018 2017 Earned premiums and fee income: Commercial Lines Workers compensation $ 3,314 $ 3,341 $ 3,287 Liability 1,064 653 604 Marine 147   Package business 1,471 1,364 1,301 Property 728 618 604 Professional liability 447 254 246 Bond 261 241 230 Assumed reinsurance 180   Automobile 713 610 630 Total Commercial Lines 8,325 7,081 6,902 Personal Lines Automobile 2,248 2,398 2,617 Homeowners 987 1,041 1,117 Total Personal Lines [1] 3,235 3,439 3,734 Property &amp; Casualty Other Operations 2   Group Benefits Group disability 2,828 2,746 1,718 Group life 2,521 2,611 1,745 Other 254 241 214 Total Group Benefits 5,603 5,598 3,677 Hartford Funds Mutual fund and ETP 907 932 888 Talcott Resolution life and annuity separate accounts [2] 92 100 104 Total Hartford Funds [3] 999 1,032 992 Corporate 60 32 4 Total earned premiums and fee income 18,224 17,182 15,309 Total net investment income 1,951 1,780 1,603 Net realized capital gains (losses) 395 (112 ) 165 Other revenues 170 105 85 Total revenues $ 20,740 $ 18,955 $ 17,162 [1] For 2019 , 2018 and 2017 , AARP members accounted for earned premiums of $2.9 billion , $3.0 billion and $3.2 billion , respectively. [2] Represents revenues earned on the life and annuity separate account AUM sold in May 2018 that is still managed by the Company's Hartford Funds segment. [3] Excludes distribution costs of $188 for the year ended December 31, 2017, that were previously netted against fee income and are now presented gross in insurance operating costs and other expenses. Net Income (Loss) For the years ended December 31, 2019 2018 2017 Commercial Lines $ 1,192 $ 1,212 $ 865 Personal Lines 318 (32 ) (9 ) Property &amp; Casualty Other Operations 61 15 69 Group Benefits 536 340 294 Hartford Funds 149 148 106 Corporate (171 ) 124 (4,456 ) Net income (loss) $ 2,085 $ 1,807 $ (3,131 ) Preferred stock dividends 21 6  Net income (loss) available to common stockholders $ 2,064 $ 1,801 $ (3,131 ) Net Investment Income For the years ended December 31, 2019 2018 2017 Commercial Lines $ 1,129 $ 997 $ 949 Personal Lines 179 155 141 Property &amp; Casualty Other Operations 84 90 106 Group Benefits 486 474 381 Hartford Funds 7 5 3 Corporate 66 59 23 Net investment income $ 1,951 $ 1,780 $ 1,603 Amortization of Deferred Policy Acquisition Costs For the years ended December 31, 2019 2018 2017 Commercial Lines $ 1,296 $ 1,048 $ 1,009 Personal Lines 259 275 309 Group Benefits 54 45 33 Hartford Funds 12 16 21 Corporate 1   Total amortization of deferred policy acquisition costs $ 1,622 $ 1,384 $ 1,372 Amortization of Other Intangible Assets For the years ended December 31, 2019 2018 2017 Commercial Lines $ 18 $ 4 $ 1 Personal Lines 6 4 4 Group Benefits 41 60 9 Corporate 1   Total amortization of other intangible assets $ 66 $ 68 $ 14 Income Tax Expense (Benefit) For the years ended December 31, 2019 2018 2017 Commercial Lines $ 270 $ 267 $ 377 Personal Lines 76 (19 ) 26 Property &amp; Casualty Other Operations 12 (7 ) 24 Group Benefits 126 84 38 Hartford Funds 37 38 63 Corporate (46 ) (95 ) 457 Total income tax expense $ 475 $ 268 $ 985 Assets As of December 31, 2019 2018 Commercial Lines $ 42,041 $ 31,693 Personal Lines 6,310 6,180 Property &amp; Casualty Other Operations 3,560 3,351 Group Benefits 14,595 14,114 Hartford Funds 634 583 Corporate 3,677 6,386 Total assets $ 70,817 $ 62,307 Revenue from Non-Insurance Contracts with Customers For the years ended December 31, Revenue Line Item 2019 2018 2017 Commercial Lines Installment billing fees Fee income $ 35 $ 34 $ 37 Personal Lines Installment billing fees Fee income 37 40 44 Insurance servicing revenues Other revenues 83 84 85 Group Benefits Administrative services Fee income 180 175 91 Hartford Funds Advisor, distribution and other management fees Fee income 911 947 897 Other fees Fee income 88 85 95 Corporate Investment management and other fees Fee income 50 32 4 Transition service revenues Other revenues 20 21  Total non-insurance revenues with customers $ 1,404 $ 1,418 $ 1,253