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Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits, Period Increase (Decrease)	$ (55)
Decrease in uncertain tax positions	42
Unrecognized Tax Benefits, Decrease Resulting from Foreign Currency Translation	$ 16

Amount of cumulative effect of the change in accounting principle or new accounting pronouncement on retained earnings or other components of equity or net assets in the statement of financial position as of the beginning of the earliest period presented.

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