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Segment Information (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2017 USD ($) | Jun. 30, 2017 USD ($) | Mar. 31, 2017 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2017 USD ($) segment | Sep. 30, 2016 USD ($)
Segment Reporting [Abstract] |  |  |  |  |  |
Number of operating segments | segment |  |  |  |  | 2 |
Revenues |  |  |  |  |  |
Total Revenues | $ 52,061 |  |  | $ 49,957 | $ 103,112 | $ 99,690
Operating profit |  |  |  |  |  |
Total | 239 |  |  | 580 | 872 | 1,552
Interest Expense | (69) |  |  | (78) | (137) | (157)
Income from Continuing Operations Before Income Taxes | 178 |  |  | 525 | 636 | 1,437
Reversal of LIFO expense |  |  |  |  | 3 | (4)
Pre-tax charges recorded during period | 236 |  |  | 0 | 236 | 0
Goodwill impairment charge | 350 |  |  | 290 | 350 | 290
Loss from equity method investment in Change Healthcare | 61 |  |  | 0 | 181 | 0
Total Distribution Solutions |  |  |  |  |  |
Operating profit |  |  |  |  |  |
Pre-tax gain recorded on sale of investment | 43 |  |  |  |  |
Goodwill impairment charge |  |  |  |  | 350 |
Technology Solutions |  |  |  |  |  |
Operating profit |  |  |  |  |  |
Goodwill impairment charge |  |  |  |  | 0 |
Technology Solutions | Enterprise Information Solutions |  |  |  |  |  |
Operating profit |  |  |  |  |  |
Goodwill impairment charge |  |  |  | 290 |  |
Operating Segments |  |  |  |  |  |
Revenues |  |  |  |  |  |
Total Revenues | 52,061 |  |  | 49,957 | 103,112 | 99,690
Operating profit |  |  |  |  |  |
Total | 355 |  |  | 677 | 990 | 1,773
Operating Segments | Total Distribution Solutions |  |  |  |  |  |
Revenues |  |  |  |  |  |
Total Revenues | 51,941 |  |  | 49,277 | 102,872 | 98,286
Operating profit |  |  |  |  |  |
Total | $ 388 |  |  | $ 851 | $ 1,101 | $ 1,779
Revenue derived from services, percentage (less than) | 2.00% |  |  | 2.00% | 2.00% | 2.00%
Proceeds from legal settlements |  |  |  |  |  | $ 142
Operating Segments | Total Distribution Solutions | LIFO Method of Accounting |  |  |  |  |  |
Operating profit |  |  |  |  |  |
Total | $ 29 |  |  | $ 43 | $ 3 | (4)
Operating Segments | Total Distribution Solutions | Reportable Subsegments | North America pharmaceutical distribution and services |  |  |  |  |  |
Revenues |  |  |  |  |  |
Total Revenues | 43,508 |  |  | 41,375 | 86,524 | 82,586
Operating Segments | Total Distribution Solutions | Reportable Subsegments | International pharmaceutical distribution and services |  |  |  |  |  |
Revenues |  |  |  |  |  |
Total Revenues | 6,773 |  |  | 6,271 | 13,155 | 12,601
Operating Segments | Total Distribution Solutions | Reportable Subsegments | Medical-Surgical distribution and services |  |  |  |  |  |
Revenues |  |  |  |  |  |
Total Revenues | 1,660 |  |  | 1,631 | 3,193 | 3,099
Operating Segments | Technology Solutions |  |  |  |  |  |
Revenues |  |  |  |  |  |
Total Revenues | 120 |  |  | 680 | 240 | 1,404
Operating profit |  |  |  |  |  |
Total | (33) |  |  | (174) | (111) | (6)
Corporate |  |  |  |  |  |
Operating profit |  |  |  |  |  |
Corporate Expenses, Net | (108) |  |  | $ (74) | (217) | $ (179)
Joint Venture | Change Healthcare, LLC (“Change Healthcare”) |  |  |  |  |  |
Operating profit |  |  |  |  |  |
Loss from equity method investment in Change Healthcare | $ 61 |  |  |  | $ 181 |
Core MTS Businesses | Change Healthcare, LLC (“Change Healthcare”) | Operating Segments | Technology Solutions |  |  |  |  |  |
Operating profit |  |  |  |  |  |
Gain from sale of business, pre-tax |  | $ 37 | $ 3,947 |  |  |

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