Goodwill and Intangible Assets, Net (Schedule of Finite-Lived Intangible Assets, Net) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Finite-Lived intangible Assets Rollforward
Acquisitions (Note 4)	$ 82	[1]	$ 67	[2]
Acquisitions (Note 5)	82	[1]	67	[2]
Exchange rate changes	62		(13)
Gross asset value	777		633		$ 579
Amortization	(20)		(9)		(11)
Exchange rate changes	(47)		13
Accumulated amortization	(591)		(524)		(528)
Net book value	186
Licenses [Member]
Finite-Lived intangible Assets Rollforward
Acquisitions (Note 4)	0		0
Acquisitions (Note 5)	0		0
Exchange rate changes	2		(2)
Gross asset value	38		36		38
Amortization	(4)		(3)
Exchange rate changes	(2)		1
Accumulated amortization	(33)		(27)		(25)
Net book value	5
Customer-Related Intangible Assets [Member]
Finite-Lived intangible Assets Rollforward
Acquisitions (Note 4)	73		64
Acquisitions (Note 5)	73		64
Exchange rate changes	58		(11)
Gross asset value	640		509		456
Amortization	(11)		(2)
Exchange rate changes	(45)		11
Accumulated amortization	(496)		(440)		(449)
Net book value	144
Developed Technology [Member]
Finite-Lived intangible Assets Rollforward
Acquisitions (Note 4)	9		0
Acquisitions (Note 5)	9		0
Exchange rate changes	1		0
Gross asset value	45		35		35
Amortization	(3)		(2)
Exchange rate changes	(1)		1
Accumulated amortization	(30)		(26)		(25)
Net book value	15
Covenants Not to Compete and Other [Member]
Finite-Lived intangible Assets Rollforward
Acquisitions (Note 4)	0		3
Acquisitions (Note 5)	0		3
Exchange rate changes	1		0
Gross asset value	54		53		50
Amortization	(2)		(2)
Exchange rate changes	1		0
Accumulated amortization	(32)		$ (31)		$ (29)
Net book value	$ 22
SO.F.TER. S.p.A. [Member]
Finite-Lived intangible Assets Rollforward
Weighted average life of intangible assets acquired			12 years
Nilit [Member]
Finite-Lived intangible Assets Rollforward
Weighted average life of intangible assets acquired	14 years

[1] Primarily related to intangible assets acquired from Nilit (Note 4) during the year ended December 31, 2017, with a weighted average amortization period of 14 years.

[2] Primarily related to intangible assets acquired from SOFTER (Note 4) during the year ended December 31, 2016, with a weighted average amortization period of 12 years.