Derivative Financial Instruments (Summary of Outstanding Cash Flow Hedges) (Details) (Cash Flow Hedging [Member], Non-U.S. Currency Contracts [Member], USD $) In Billions	Sep. 30, 2011	Dec. 31, 2010
Cash Flow Hedging [Member] \| Non-U.S. Currency Contracts [Member]
Derivatives, Fair Value [Line Items]
Notional amount of cash flow hedge instruments	$ 1.6	$ 1.3
Latest maturity date	June 2021	June 2021

Aggregate notional amount of all derivatives designated as cash flow hedging instruments. The notional amount relates to a number of currency units, shares, bushels, pounds, or other units specified in a derivative instrument.

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104

Name:	us-gaap_NotionalAmountOfCashFlowHedgeInstruments
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant