Goodwill and Intangible Assets, Net (Schedule of Finite-Lived Intangible Assets, Net) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012		Sep. 30, 2011	Dec. 31, 2011
Gross Asset Value
Acquisitions (Note 3)			$ 13	[1]
Exchange rate changes			0
Gross asset value	607		607			594
Accumulated Amortization
Amortization	(12)	(17)	(38)		(50)
Exchange rate changes			0
Accumulated amortization	(516)		(516)			(478)
Net book value	91		91
Weighted average life of intangible assets acquired			6 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	(15)		(15)			(13)
Net book value	17		17
Customer-Related Intangible Assets [Member]
Gross Asset Value
Acquisitions (Note 3)			4
Exchange rate changes			0
Gross asset value	517		517			513
Accumulated Amortization
Amortization			(30)
Exchange rate changes			0
Accumulated amortization	(463)		(463)			(433)
Net book value	54		54
Developed Technology [Member]
Gross Asset Value
Acquisitions (Note 3)			3
Exchange rate changes			0
Gross asset value	30		30			27
Accumulated Amortization
Amortization			(2)
Exchange rate changes			0
Accumulated amortization	(16)		(16)			(14)
Net book value	14		14
Covenants Not to Compete and Other [Member]
Gross Asset Value
Acquisitions (Note 3)			6
Exchange rate changes			0
Gross asset value	28		28			22
Accumulated Amortization
Amortization			(4)
Exchange rate changes			0
Accumulated amortization	(22)		(22)			(18)
Net book value	$ 6		$ 6

[1] Weighted average amortization period of intangible assets acquired was 6 years.