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, 2013	Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012	Dec. 31, 2012
Gross Asset Value
Acquisitions (Note 3)			$ 7	[1]
Exchange rate changes			11
Gross asset value	637		637			619
Accumulated Amortization
Amortization	(6)	(12)	(26)		(38)
Exchange rate changes			(10)
Accumulated amortization	(572)		(572)			(536)
Net book value	65		65
Weighted average life of intangible assets acquired			29 years
Licenses [Member]
Gross Asset Value
Acquisitions (Note 3)			0
Exchange rate changes			1
Gross asset value	33		33			32
Accumulated Amortization
Amortization			(3)
Exchange rate changes			0
Accumulated amortization	(19)		(19)			(16)
Net book value	14		14
Customer-Related Intangible Assets [Member]
Gross Asset Value
Acquisitions (Note 3)			0
Exchange rate changes			10
Gross asset value	535		535			525
Accumulated Amortization
Amortization			(19)
Exchange rate changes			(10)
Accumulated amortization	(509)		(509)			(480)
Net book value	26		26
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)			7
Exchange rate changes			0
Gross asset value	39		39			32
Accumulated Amortization
Amortization			(2)
Exchange rate changes			0
Accumulated amortization	(25)		(25)			(23)
Net book value	$ 14		$ 14

[1] Weighted average amortization period is 29 years.