Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

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- Definition

General discussion of the entity's foreign currency derivative activities.

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-Topic 815

-SubTopic 10

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General discussion of the entity's activities involving interest rate derivatives not designated as hedging instruments.

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Date the foreign currency exchange rate derivatives mature or expire, in CCYY-MM-DD format.

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No definition available.

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Hedging Activities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Dec. 31, 2014	Dec. 31, 2014	Mar. 31, 2014
Foreign Exchange Contract [Member]
Derivative [Line Items]
Foreign currency derivative description		manage the impact of foreign currency fluctuation
Foreign Exchange Contract [Member] \| Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional amount	$ 463	$ 463	$ 463
Foreign Exchange Contract [Member] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional amount	1,808	1,808	1,091
Net gain (loss) from derivatives	(24)	(74)
Interest Rate Swap [Member]
Derivative [Line Items]
Interest rate derivative description		hedge the interest rate risk associated with Celesio’s variable rate debt
Interest Rate Swap [Member] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional amount			$ 96
Minimum [Member] \| Foreign Exchange Contract [Member] \| Designated as Hedging Instrument [Member]
Derivative [Line Items]
Maturity dates		Mar. 31, 2015
Minimum [Member] \| Foreign Exchange Contract [Member] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Maturity dates		Jan. 02, 2015
Maximum [Member] \| Foreign Exchange Contract [Member] \| Designated as Hedging Instrument [Member]
Derivative [Line Items]
Maturity dates		Mar. 31, 2020
Maximum [Member] \| Foreign Exchange Contract [Member] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Maturity dates		Dec. 15, 2015