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Business Combinations - Acquisition of Celesio AG (Details) shares in Millions, $ in Millions |  | 2 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 06, 2014 USD ($) country | Mar. 31, 2014 USD ($) shares | Mar. 31, 2016 USD ($) | Mar. 31, 2015 USD ($) | Mar. 31, 2014 USD ($)
Business Acquisition [Line Items] |  |  |  |  |
Cash consideration |  |  | $ 40 | $ 170 | $ 4,634
Goodwill |  | $ 9,927 | $ 9,786 | 9,817 | $ 9,927
Celesio |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Percentage of outstanding common shares | 77.60% |  |  |  |
Cash consideration | $ 4,500 |  |  |  |
Fully diluted common shares (as a percent) | 75.60% |  |  |  |
Fair value | $ 2,300 |  |  |  |
Number of countries | country | 14 |  |  |  |
Additional common shares from conversion | shares |  | 20.9 |  |  |
Cash amount from conversion |  | $ 30 |  |  |
Percentage of outstanding common shares |  | 75.40% |  |  | 75.40%
Acquired identifiable intangibles |  |  |  | 2,300 |
Fair value of noncontrolling interest |  |  |  | 1,505 |
Goodwill |  |  |  | $ 4,200 |

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- Definition The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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