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Segment Reporting (Details) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Sep. 30, 2017 USD ($) | Sep. 30, 2018 USD ($) segment | Sep. 30, 2017 USD ($)
Segment reporting information |  |  |  |  |
Number of operating segments | segment |  |  |  | 2 |
Number of reportable segments | segment |  |  |  | 3 |
Net revenues | $ 47,269 |  | $ 46,181 | $ 139,670 | $ 136,380
Cost of revenue | 39,941 |  | 39,064 | 118,282 | 115,766
Gross profit | 7,328 |  | 7,117 | 21,388 | 20,614
Operating expenses |  |  | 4,618 |  | 14,205
Operating profit (loss) | 2,353 |  | 2,499 | 2,712 | 6,409
Goodwill, impairment loss |  |  |  | 3,921 | 135
Pharmacy Services Segment |  |  |  |  |
Segment reporting information |  |  |  |  |
Net revenues, retail co-payments | 2,700 |  | 2,600 | 8,800 | 8,400
Retail/LTC Segment |  |  |  |  |
Segment reporting information |  |  |  |  |
Goodwill, impairment loss |  |  |  | 3,921 |
Loss on disposal |  |  |  | 86 |
Retail/LTC Segment | Operating profit |  |  |  |  |
Segment reporting information |  |  |  |  |
Restructuring Charges |  |  | 6 |  | 211
Rx Crossroads |  |  |  |  |
Segment reporting information |  |  |  |  |
Goodwill, impairment loss |  |  |  |  | 135
LTC reporting unit |  |  |  |  |
Segment reporting information |  |  |  |  |
Goodwill, impairment loss |  | $ 3,900 |  |  |
LTC reporting unit | Operating profit |  |  |  |  |
Segment reporting information |  |  |  |  |
Goodwill, impairment loss |  |  |  | 3,900 |
Operating Segments | Pharmacy Services Segment |  |  |  |  |
Segment reporting information |  |  |  |  |
Net revenues | 33,763 |  | 32,896 | 99,228 | 96,444
Cost of revenue |  |  | 31,264 |  | 92,273
Gross profit | 1,737 |  | 1,632 | 4,370 | 4,171
Operating expenses |  |  | 305 |  | 975
Operating profit (loss) | 1,345 |  | 1,327 | 3,194 | 3,196
Operating Segments | Retail/LTC Segment |  |  |  |  |
Segment reporting information |  |  |  |  |
Net revenues | 20,856 |  | 19,593 | 61,960 | 58,488
Cost of revenue |  |  | 13,904 |  | 41,440
Gross profit | 5,814 |  | 5,689 | 17,642 | 17,048
Operating expenses |  |  | 4,108 |  | 12,606
Operating profit (loss) | 1,491 |  | 1,581 | 890 | 4,442
Operating Segments | Corporate Segment |  |  |  |  |
Segment reporting information |  |  |  |  |
Operating expenses |  |  | 222 |  | 677
Operating profit (loss) | (287) |  | (222) | (814) | (677)
Intersegment Eliminations |  |  |  |  |
Segment reporting information |  |  |  |  |
Net revenues | (7,350) |  | (6,308) | (21,518) | (18,552)
Cost of revenue |  |  | (6,104) |  | (17,947)
Gross profit | (223) |  | (204) | (624) | (605)
Operating expenses |  |  | (17) |  | (53)
Operating profit (loss) | (196) |  | (187) | (558) | (552)
Previously Reported |  |  |  |  |
Segment reporting information |  |  |  |  |
Cost of revenue |  |  | 39,055 |  | 115,739
Gross profit |  |  | 7,126 |  | 20,641
Operating expenses |  |  | 4,627 |  | 14,232
Operating profit (loss) |  |  | 2,499 |  | 6,409
Previously Reported | Operating Segments | Pharmacy Services Segment |  |  |  |  |
Segment reporting information |  |  |  |  |
Cost of revenue |  |  | 31,251 |  | 92,234
Gross profit |  |  | 1,645 |  | 4,210
Operating expenses |  |  | 292 |  | 938
Operating profit (loss) |  |  | 1,353 |  | 3,272
Previously Reported | Operating Segments | Retail/LTC Segment |  |  |  |  |
Segment reporting information |  |  |  |  |
Cost of revenue |  |  | 13,908 |  | 41,452
Gross profit |  |  | 5,685 |  | 17,036
Operating expenses |  |  | 4,132 |  | 12,661
Operating profit (loss) |  |  | 1,553 |  | 4,375
Previously Reported | Operating Segments | Corporate Segment |  |  |  |  |
Segment reporting information |  |  |  |  |
Operating expenses |  |  | 220 |  | 686
Operating profit (loss) |  |  | (220) |  | (686)
Previously Reported | Intersegment Eliminations |  |  |  |  |
Segment reporting information |  |  |  |  |
Cost of revenue |  |  | (6,104) |  | (17,947)
Gross profit |  |  | (204) |  | (605)
Operating expenses |  |  | (17) |  | (53)
Operating profit (loss) |  |  | (187) |  | (552)
Adjustments. |  |  |  |  |
Segment reporting information |  |  |  |  |
Cost of revenue |  |  | 9 |  | 27
Gross profit |  |  | (9) |  | (27)
Operating expenses |  |  | (9) |  | (27)
Adjustments. | Operating Segments | Pharmacy Services Segment |  |  |  |  |
Segment reporting information |  |  |  |  |
Cost of revenue |  |  | 13 |  | 39
Gross profit |  |  | (13) |  | (39)
Operating expenses |  |  | 13 |  | 37
Operating profit (loss) |  |  | (26) |  | (76)
Adjustments. | Operating Segments | Retail/LTC Segment |  |  |  |  |
Segment reporting information |  |  |  |  |
Cost of revenue |  |  | (4) |  | (12)
Gross profit |  |  | 4 |  | 12
Operating expenses |  |  | (24) |  | (55)
Operating profit (loss) |  |  | 28 |  | 67
Adjustments. | Operating Segments | Corporate Segment |  |  |  |  |
Segment reporting information |  |  |  |  |
Operating expenses |  |  | 2 |  | (9)
Operating profit (loss) |  |  | (2) |  | 9
Omnicare, Inc. | Retail/LTC Segment | Gross Profit |  |  |  |  |
Segment reporting information |  |  |  |  |
Acquisition related costs |  |  | 2 |  | 7
Omnicare, Inc. | Retail/LTC Segment | Operating profit |  |  |  |  |
Segment reporting information |  |  |  |  |
Integration related costs | 4 |  | 9 | 7 | 34
Omnicare, Inc. | Corporate Segment | Operating profit |  |  |  |  |
Segment reporting information |  |  |  |  |
Business Combination Acquisition Related Costs And Integration Related Costs |  |  | $ 3 |  | $ 3
Aetna Acquisition | Corporate Segment | Operating profit |  |  |  |  |
Segment reporting information |  |  |  |  |
Business Combination Acquisition Related Costs And Integration Related Costs | $ 66 |  |  | $ 145 |

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