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Segments of Business - Schedule of Segment Information (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2019
Segment revenues (1) |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 59,142 | $ 62,599 | $ 60,808 | $ 55,679 | $ 58,535 | $ 59,172 | $ 57,616 | $ 55,728 | $ 238,228 | $ 231,051 | $ 214,319
Operating profit |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | 3,828 | 2,366 | 1,513
Corporate Expenses, Net |  |  |  |  |  |  |  |  | (8,645) | (973) | (639)
Interest expense |  |  |  |  |  |  |  |  | (217) | (249) | (264)
Income (loss) from continuing operations before income taxes |  |  |  |  |  |  |  |  | (5,034) | 1,144 | 610
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  | 887 | 922 | 949
Expenditures for long-lived assets |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  | 641 | 506 | 557
Corporate |  |  |  |  |  |  |  |  |  |  |
Operating profit |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | 0 | (1,113) | (104)
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  | 125 | 136 | 122
Expenditures for long-lived assets |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  | 104 | 120 | 125
U.S. Pharmaceutical |  |  |  |  |  |  |  |  |  |  |
Segment revenues (1) |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 189,274 | 181,700 | 166,189
U.S. Pharmaceutical | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Operating profit |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | 2,763 | 2,745 | 2,710
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  | 211 | 208 | 227
Expenditures for long-lived assets |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  | 246 | 109 | 103
International |  |  |  |  |  |  |  |  |  |  |
Segment revenues (1) |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 35,965 | 38,341 | 38,023
International | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Operating profit |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | (37) | (161) | (1,903)
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  | 334 | 357 | 392
Expenditures for long-lived assets |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  | 212 | 218 | 199
Medical-Surgical Solutions |  |  |  |  |  |  |  |  |  |  |
Segment revenues (1) |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 10,099 | 8,305 | 7,618
Medical-Surgical Solutions | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Operating profit |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | 707 | 499 | 455
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  | 130 | 136 | 118
Expenditures for long-lived assets |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  | 57 | 36 | 116
Prescription Technology Solutions |  |  |  |  |  |  |  |  |  |  |
Segment revenues (1) |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 2,890 | 2,705 | 2,489
Prescription Technology Solutions | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Operating profit |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | 395 | 396 | 355
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  | 87 | 85 | 90
Expenditures for long-lived assets |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  |  |  |  |  | $ 22 | $ 23 | $ 14

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