Commitments and Contingencies Purchase Obligations (Details) (USD $)	Mar. 31, 2013
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded noncancelable obligations for remainder of fiscal 2013	$ 3,400,000,000
Unrecorded noncancelable obligations for fiscal 2014	447,000,000
Unrecorded noncancelable obligations for fiscal 2015	127,000,000
Unrecorded noncancelable obligations for fiscal 2016	31,000,000
Unrecorded noncancelable obligations for fiscal 2017	4,000,000
Unrecorded noncancelable obligations thereafter	11,000,000
Inventories [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded noncancelable obligations for remainder of fiscal 2013	3,000,000,000
Unrecorded noncancelable obligations for fiscal 2014	348,000,000
Unrecorded noncancelable obligations for fiscal 2015	$ 79,000,000

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the fifth fiscal year following the latest fiscal year.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 440

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 47

-Paragraph 7

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the next fiscal year following the latest fiscal year.

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- Definition

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the four fiscal year following the latest fiscal year.

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- Definition

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the second fiscal year following the latest fiscal year.

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- Definition

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the third fiscal year following the latest fiscal year.

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- Definition

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing after the fifth fiscal year following the latest fiscal year.

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