Derivative Financial Instruments (Schedule of Changes in Fair Value of Derivatives) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014		Dec. 31, 2013
Derivative [Line Items]
Notional Value		$ 500
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain (loss) recognized in Other comprehensive income (loss)		0	$ (9)		$ (2)
Gain (loss) recognized in Earnings (loss)		46	42		(11)
Derivatives Not Designated as Hedges [Member]
Derivative [Line Items]
Gain (loss) recognized in Other comprehensive income (loss)		0	0		0
Gain (loss) recognized in Earnings (loss)		(83)	(18)		(23)
Foreign Currency Forwards and Swaps [Member] | Derivatives Not Designated as Hedges [Member]
Derivative [Line Items]
Gain (loss) recognized in Other comprehensive income (loss)		0	0		0
Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain (loss) recognized in Other comprehensive income (loss)		0	(1)		(2)
Interest Rate Swaps [Member] | Derivatives Not Designated as Hedges [Member]
Derivative [Line Items]
Gain (loss) recognized in Other comprehensive income (loss)		0	0		0
Cross Currency Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain (loss) recognized in Other comprehensive income (loss)		0	(8)		0
Interest Expense [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain (loss) recognized in Earnings (loss)		0	(4)		(11)
Interest Expense [Member] | Interest Rate Swaps [Member] | Derivatives Not Designated as Hedges [Member]
Derivative [Line Items]
Gain (loss) recognized in Earnings (loss)		(1)	(3)	[1]	0
Other Income [Member] | Cross Currency Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gain (loss) recognized in Earnings (loss)		46	46		0
Foreign Currency Gain (Loss) [Member] | Foreign Currency Forwards and Swaps [Member] | Derivatives Not Designated as Hedges [Member]
Derivative [Line Items]
Gain (loss) recognized in Earnings (loss)		(82)	(15)		(23)
Net Investment Hedging [Member]
Derivative [Line Items]
Gain (Loss) On Non-Derivative Used In Net Investment Hedge		48	23		0
Amount of Ineffectiveness on Net Investment Hedges		0	0		0
Senior Unsecured Notes Due 2019 [Member] | Net Investment Hedging [Member]
Derivative [Line Items]
Gain (Loss) On Non-Derivative Used In Net Investment Hedge		38	23		0
Senior Unsecured Notes Due 2019 [Member] | Net Investment Hedging [Member] | Foreign Currency Gain (Loss) [Member]
Derivative [Line Items]
Amount of Ineffectiveness on Net Investment Hedges		0	0		0
Term C-2 and C-3 Loan Facilities [Member] | Net Investment Hedging [Member]
Derivative [Line Items]
Gain (Loss) On Non-Derivative Used In Net Investment Hedge	[2]	10	0		0
Term C-2 and C-3 Loan Facilities [Member] | Net Investment Hedging [Member] | Foreign Currency Gain (Loss) [Member]
Derivative [Line Items]
Amount of Ineffectiveness on Net Investment Hedges	[2]	0	0		$ 0
Swap Derivative 1 Point 02 Percent Maturing January 2, 2016 [Member]
Derivative [Line Items]
Notional Value		$ 500	$ 500

[1] In December 2014, the Company dedesignated as cash flow hedges a notional value of $500 million US dollar interest rate swap agreements expiring January 2, 2016.

[2] During the three months ended March 31, 2015, the Company designated the Euro-based principal amount of its Term C-2 loan and its Term C-3 loan as a net investment hedge of its investment in a wholly-owned international subsidiary whose functional currency is the Euro to mitigate the volatility caused by the changes in foreign currency exchange rates of the Euro with respect to the US dollar. During the three months ended December 31, 2015, the Company dedesignated the Euro-based principal amount of its Term C-3 loan as a net investment hedge.