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Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended				12 Months Ended
	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Cvs Caremark Corporation Member	Mar. 31, 2014 Pharmaceutical Walgreens Co Member	Jun. 30, 2013 Pharmaceutical Walgreens Co Member
Concentration Risk [Line Items]
Contract expiration date					Aug. 31, 2013
Revenue, Major Customer, Percentage						20.00%
Expected JV Operational Date				Jul. 01, 2014
Term of Agreement				10 years
Quarterly joint venture payment				$ 25
Proceeds from sale of other investments	47	47	0
Gain on sale of investments	$ 32	$ 32	$ 0

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Contract expiration date

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- Definition

The earliest date of which the U.S.-based generic sourcing entity (Sourcing JV) with CVS is expected to be operational.

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An expected quarterly payment over the term of the Sourcing JV that the company will pay to CVS. To begin upon completion of final documentation and customary closing conditions.

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Initial term of the agreement for the U.S.-based generic sourcing entity (Sourcing JV) with CVS.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The difference between the carrying value and the sale price of an investment. A gain would be recognized when the sale price of the investment is greater than the carrying value of the investment. This element refers to the Gain included in earnings and not to the cash proceeds of the sale.

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The cash inflow associated with the sale of other investments not otherwise defined in the taxonomy.

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