Derivative Financial Instruments (Details Textuals) (USD $) In Millions	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Derivatives, Fair Value [Line Items]
Derivative Assets	$ 42		$ 47
Derivative Liabilities	55		23
Derivative Financial Instruments (Textuals) [Abstract]
Minimum Derivative Financial Instrument's Term (Months)	2 months
Maximum Derivative Financial Instrument's Term (Months)	24 months
Fair Value of Foreign Currency Forward Contracts	13
Amount of interest rate swap	0
Accumulated other comprehensive income (loss), reclassified	(18)
Amount of gain (loss) recognized in income on derivative (ineffective portion)	11	5
Amount of gain (loss) recognized in income on derivative (amount excluded from hedge effectiveness)	13	8
Fair Value, Inputs, Level 2 [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	42
Derivative Liabilities	$ 55

Derivative Financial Instruments.

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Maximum Derivative Financial Instrument's Term.

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Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Fair value as of the balance sheet date of foreign currency derivative assets, net of foreign currency derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized on the balance sheet.

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Net gain (loss) recognized in earnings during the reporting period representing the amount of the fair value of the hedges' ineffectiveness.

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Fair value as of the balance sheet date of interest rate derivative assets, net of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized on the balance sheet.

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Net of tax effect of the reclassification adjustment for accumulated gains and losses from derivative instrument designated and qualifying as the effective portion of cash flow hedges included in accumulated comprehensive income that was realized in net income during the period.

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