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Goodwill and Intangible Assets, Net - Schedule of Changes in the Carrying Amount of Goodwill and Narrative (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017
Goodwill [Roll Forward] |  |
Beginning balance | $ 10,924 |
Goodwill acquired | 391 |
Goodwill impairment charges | (570) | $ 0
Acquisition accounting, transfers and other adjustments | 10 |
Foreign currency translation adjustments, net | (170) |
Ending balance | 10,585 |
U.S. Pharmaceutical and Specialty Solutions |  |
Goodwill [Roll Forward] |  |
Beginning balance | 4,110 |
Goodwill acquired | 0 |
Goodwill impairment charges | 0 |
Acquisition accounting, transfers and other adjustments | 4 |
Foreign currency translation adjustments, net | (36) |
Ending balance | 4,078 |
European Pharmaceutical Solutions |  |
Goodwill [Roll Forward] |  |
Beginning balance | 1,850 |
Goodwill acquired | 31 |
Goodwill impairment charges | (570) |
Acquisition accounting, transfers and other adjustments | 0 |
Foreign currency translation adjustments, net | (98) |
Ending balance | 1,213 |
Medical-Surgical Solutions |  |
Goodwill [Roll Forward] |  |
Beginning balance | 2,070 |
Goodwill acquired | 360 |
Goodwill impairment charges | 0 |
Acquisition accounting, transfers and other adjustments | 0 |
Foreign currency translation adjustments, net | 0 |
Ending balance | 2,430 |
Other |  |
Goodwill [Roll Forward] |  |
Beginning balance | 2,894 |
Goodwill acquired | 0 |
Goodwill impairment charges | 0 |
Acquisition accounting, transfers and other adjustments | 6 |
Foreign currency translation adjustments, net | (36) |
Ending balance | $ 2,864 |

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