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v3.19.3.a.u2

Segment Reporting - Summarized Financial Information of Segments (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues from customers |  |  |  |  |  |  |  |  | $ 255,765 | $ 193,919 | $ 184,765
Net investment income |  |  |  |  |  |  |  |  | 1,011 | 660 | 21
Total revenues | $ 66,889 | $ 64,810 | $ 63,431 | $ 61,646 | $ 54,424 | $ 47,490 | $ 46,922 | $ 45,743 | 256,776 | 194,579 | 184,786
Adjusted operating income (loss) |  |  |  |  |  |  |  |  | 15,339 | 11,261 | 10,825
Depreciation and amortization |  |  |  |  |  |  |  |  | 4,371 | 2,718 | 2,479
Additions to property and equipment |  |  |  |  |  |  |  |  | 2,481 | 2,123 | 2,049
Corporate/ Other |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues from customers |  |  |  |  |  |  |  |  | 100 | 4 | 0
Net investment income |  |  |  |  |  |  |  |  | 412 | 602 | 16
Total revenues |  |  |  |  |  |  |  |  | 512 | 606 | 16
Adjusted operating income (loss) |  |  |  |  |  |  |  |  | (1,000) | (856) | (896)
Depreciation and amortization |  |  |  |  |  |  |  |  | 161 | 138 | 116
Additions to property and equipment |  |  |  |  |  |  |  |  | 404 | 401 | 340
Operating Segments | Pharmacy Services |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues from customers |  |  |  |  |  |  |  |  | 141,491 | 134,736 | 130,822
Net investment income |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total revenues |  |  |  |  |  |  |  |  | 141,491 | 134,736 | 130,822
Adjusted operating income (loss) |  |  |  |  |  |  |  |  | 5,129 | 4,955 | 4,628
Depreciation and amortization |  |  |  |  |  |  |  |  | 766 | 710 | 710
Additions to property and equipment |  |  |  |  |  |  |  |  | 332 | 326 | 311
Co-payments |  |  |  |  |  |  |  |  | 11,500 | 11,400 | 10,800
Operating Segments | Retail/ LTC |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues from customers |  |  |  |  |  |  |  |  | 86,608 | 83,989 | 79,398
Net investment income |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total revenues |  |  |  |  |  |  |  |  | 86,608 | 83,989 | 79,398
Adjusted operating income (loss) |  |  |  |  |  |  |  |  | 6,705 | 7,403 | 7,475
Depreciation and amortization |  |  |  |  |  |  |  |  | 1,723 | 1,698 | 1,651
Additions to property and equipment |  |  |  |  |  |  |  |  | 1,212 | 1,350 | 1,398
Operating Segments | Health Care Benefits |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues from customers |  |  |  |  |  |  |  |  | 69,005 | 8,904 | 3,582
Net investment income |  |  |  |  |  |  |  |  | 599 | 58 | 5
Total revenues |  |  |  |  |  |  |  |  | 69,604 | 8,962 | 3,587
Adjusted operating income (loss) |  |  |  |  |  |  |  |  | 5,202 | 528 | 359
Depreciation and amortization |  |  |  |  |  |  |  |  | 1,721 | 172 | 2
Additions to property and equipment |  |  |  |  |  |  |  |  | 533 | 46 | 0
Intersegment Eliminations |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues from customers |  |  |  |  |  |  |  |  | (41,439) | (33,714) | (29,037)
Net investment income |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total revenues |  |  |  |  |  |  |  |  | (41,439) | (33,714) | (29,037)
Adjusted operating income (loss) |  |  |  |  |  |  |  |  | (697) | (769) | (741)
Depreciation and amortization |  |  |  |  |  |  |  |  | 0 | 0 | 0
Additions to property and equipment |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 0

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