Goodwill and Intangible Assets, Net (Schedule of Finite-Lived Intangible Assets, Net) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013		Jun. 30, 2012	Dec. 31, 2012
Gross Asset Value
Acquisitions (Note 3)			$ 8	[1]
Exchange rate changes			(3)
Gross asset value	624		624			619
Accumulated Amortization
Amortization	(9)	(13)	(20)		(26)
Exchange rate changes			3
Accumulated amortization	(553)		(553)			(536)
Net book value	71		71
Weighted average life of intangible assets acquired			29 years
Licenses [Member]
Gross Asset Value
Acquisitions (Note 3)			0
Exchange rate changes			0
Gross asset value	32		32			32
Accumulated Amortization
Amortization			(2)
Exchange rate changes			0
Accumulated amortization	(18)		(18)			(16)
Net book value	14		14
Customer-Related Intangible Assets [Member]
Gross Asset Value
Acquisitions (Note 3)			0
Exchange rate changes			(3)
Gross asset value	522		522			525
Accumulated Amortization
Amortization			(15)
Exchange rate changes			3
Accumulated amortization	(492)		(492)			(480)
Net book value	30		30
Developed Technology [Member]
Gross Asset Value
Acquisitions (Note 3)			0
Exchange rate changes			0
Gross asset value	30		30			30
Accumulated Amortization
Amortization			(2)
Exchange rate changes			0
Accumulated amortization	(19)		(19)			(17)
Net book value	11		11
Covenants Not to Compete and Other [Member]
Gross Asset Value
Acquisitions (Note 3)			8
Exchange rate changes			0
Gross asset value	40		40			32
Accumulated Amortization
Amortization			(1)
Exchange rate changes			0
Accumulated amortization	(24)		(24)			(23)
Net book value	$ 16		$ 16

[1] Weighted average amortization period is 29 years.