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Business Combinations (Details) $ in Millions, CAD in Billions |  |  | 1 Months Ended | 3 Months Ended
--- | --- | --- | --- | ---
Apr. 01, 2016 USD ($) cancer_treatment_facility state | Feb. 29, 2016 USD ($) | Mar. 31, 2016 USD ($) pharmacy | Mar. 31, 2016 CAD | Jun. 30, 2016 USD ($) | Jun. 30, 2015 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |
Net purchase consideration |  |  |  |  | $ 1,819 | $ 6
Goodwill |  |  | $ 9,786 |  | $ 11,127 |
Biologics |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Net purchase consideration | $ 692 |  |  |  |  |
Goodwill | 613 |  |  |  |  |
Intangible assets | 112 |  |  |  |  |
UDG |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Net purchase consideration | 447 |  |  |  |  |
Goodwill | 165 |  |  |  |  |
Total assets acquired, excluding goodwill and intangibles | 497 |  |  |  |  |
Total liabilities acquired, excluding goodwill and intangibles | $ 329 |  |  |  |  |
Sainsbury | U.K. |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Gross purchase consideration paid |  | $ 174 |  |  |  |
Interest rate (percent) |  | 0.033 |  |  |  |
Vantage |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Number of cancer treatment facilities acquired | cancer_treatment_facility | 51 |  |  |  |  |
Number of states | state | 13 |  |  |  |  |
Net purchase consideration | $ 515 |  |  |  |  |
Goodwill | 606 |  |  |  |  |
Fair value of noncontrolling interests | 152 |  |  |  |  |
Intangible assets | 24 |  |  |  |  |
Rexall Health | CANADA |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Number of cancer treatment facilities acquired | pharmacy |  |  | 470 |  |  |
Gross purchase consideration paid |  |  | $ 2,300 | CAD 3 |  |
Currency exchange ratio (in CAD per USD) |  |  | 0.77 |  |  |
Service agreements | Biologics |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Intangible assets | $ 32 |  |  |  |  |
Estimated weighted average life of the acquired intangibles | 3 years |  |  |  |  |
Noncompete Agreements | Vantage |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Intangible assets | $ 14 |  |  |  |  |
Estimated weighted average life of the acquired intangibles | 4 years |  |  |  |  |
Trademarks | Biologics |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Intangible assets | $ 65 |  |  |  |  |
Estimated weighted average life of the acquired intangibles | 14 years |  |  |  |  |
Customer relationships | UDG |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Intangible assets | $ 114 |  |  |  |  |
Estimated weighted average life of the acquired intangibles | 10 years |  |  |  |  |

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