Legal Proceedings (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended	0 Months Ended
Oct. 31, 2011	Nov. 14, 2007 Braun/Hummel Lawsuit [Member]	Oct. 13, 2006 Braun/Hummel Lawsuit [Member]
Loss Contingencies [Line Items]
Jury award			$ 78
Litigation settlement, gross		$ 188
Rate of post-judgment interest accrual	6.00%

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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