Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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Number of foreign currency exchange rate derivatives held by the entity at the reporting date.

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Current period adjustment in other comprehensive income reflecting gains or losses on foreign currency transactions that are designated as, and are effective as, hedges of a net investment in a foreign entity, net of tax effect.

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Financial Instruments (Details) € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) contract	Dec. 31, 2015 EUR (€) contract	May. 12, 2015 USD ($)	May. 12, 2015 EUR (€)	Dec. 31, 2014 contract	Dec. 31, 2013 contract
Derivative [Line Items]
Long-term debt, gross			$ 3,995
Senior Notes [Member]
Derivative [Line Items]
Long-term debt, gross			$ 2,503
Senior Notes 6.125% Due May 2023 [Member] \| Senior Notes [Member]
Derivative [Line Items]
Long-term debt, gross	$ 395	€ 360		€ 360
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Recognized gain on derivative net investment hedge	$ 8
Foreign Exchange Contract [Member]
Derivative [Line Items]
Number of forward exchange currency contracts \| contract	41	41			0	0
Derivative notional value	$ 288
Foreign Exchange Contract [Member] \| Not Designated as Hedging Instrument [Member] \| Other Income [Member]
Derivative [Line Items]
Derivative gain	$ 42