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Segment Information (Details) $ in Millions | 3 Months Ended
--- | ---
Jun. 30, 2016 USD ($) segment | Jun. 30, 2015 USD ($)
Segment Reporting [Abstract] |  |
Number of operating segments | segment | 2 |
Revenues |  |
Total Revenues | $ 49,733 | $ 47,546
Operating profit |  |
Total | 972 | 931
Interest Expense | (79) | (89)
Income from Continuing Operations Before Income Taxes | 912 | 855
Gain on disposition of business | (113) | 51
Operating Segments |  |
Revenues |  |
Total Revenues | 49,733 | 47,546
Operating profit |  |
Total | 1,096 | 1,068
Operating Segments | Total Distribution Solutions |  |
Revenues |  |
Total Revenues | 49,009 | 46,810
Operating profit |  |
Total | $ 928 | $ 910
Revenue derived from services, percentage (less than) | 2.00% | 2.00%
Proceeds from legal settlements | $ 142 | $ 59
Operating Segments | Total Distribution Solutions | LIFO Method of Accounting |  |
Operating profit |  |
Total | 47 | 91
Operating Segments | Total Distribution Solutions | Reportable Subsegments | North America pharmaceutical distribution and services |  |
Revenues |  |
Total Revenues | 41,211 | 39,532
Operating Segments | Total Distribution Solutions | Reportable Subsegments | International pharmaceutical distribution and services |  |
Revenues |  |
Total Revenues | 6,330 | 5,838
Operating Segments | Total Distribution Solutions | Reportable Subsegments | Medical-Surgical distribution and services |  |
Revenues |  |
Total Revenues | 1,468 | 1,440
Operating Segments | Technology Solutions |  |
Revenues |  |
Total Revenues | 724 | 736
Operating profit |  |
Total | 168 | 158
Operating Segments | Technology Solutions | Nurse Triage |  |
Operating profit |  |
Gain on disposition of business |  | 51
Corporate |  |
Operating profit |  |
Corporate Expenses, Net | (105) | (124)
Segment Reconciling Items |  |
Operating profit |  |
Interest Expense | $ (79) | $ (89)

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