Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	$ (238)
Amortization of prior service credit cost	(3)	$ (3)	$ (1)
Foreign currency translation adjustment for postretirement benefit plans	19	21	20
Unrealized losses	0	(22)	(22)
Reclassification of unrealized loss on derivative hedge agreements into revenue	(2)	20	6
Ending Balance	(318)	(238)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(238)	(99)	167
Foreign currency translation adjustment	(65)	(180)	(206)
Income tax impact on foreign currency translation adjustment	(21)	(8)
Amortization of prior service credit cost	(19)	24	(92)
Income tax expense on changes in postretirement benefit plans	3	(10)	20
Foreign currency translation adjustment for postretirement benefit plans	19	21
Income tax impact on amortization of postretirement benefit plan items	(5)	(4)	(3)
Unrealized losses		(22)	(22)
Income tax benefit on unrealized loss			1
Income tax benefit on unrealized loss on derivative hedge agreements		6
Income tax benefit on reclassification of unrealized loss on derivative hedge agreements		1
Ending Balance	(318)	(238)	(99)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(43)	145	351
Foreign currency translation adjustment	(65)	(180)	(206)
Income tax impact on foreign currency translation adjustment	(21)	(8)
Ending Balance	(140)	(43)	145
Postretirement Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(185)	(231)	(186)
Amortization of prior service credit cost	(19)	24	(92)
Income tax expense on changes in postretirement benefit plans	3	(10)	20
Foreign currency translation adjustment for postretirement benefit plans	19	21
Income tax impact on amortization of postretirement benefit plan items	(5)	(4)	(3)
Ending Balance	(177)	(185)	(231)
Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(10)	(13)	2
Unrealized losses		(22)	(22)
Income tax benefit on unrealized loss			1
Income tax benefit on unrealized loss on derivative hedge agreements		6
Income tax benefit on reclassification of unrealized loss on derivative hedge agreements		1
Ending Balance	(1)	(10)	(13)
Cost of Revenue | Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Amortization of prior service credit cost	3	4	4
Reclassification of unrealized loss on derivative hedge agreements into revenue		(1)	(1)
Cost of Revenue | Postretirement Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Amortization of prior service credit cost	3	4	4
Cost of Revenue | Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Reclassification of unrealized loss on derivative hedge agreements into revenue		(1)	(1)
Selling, General and Administrative Expenses | Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Amortization of prior service credit cost	6	9	5
Selling, General and Administrative Expenses | Postretirement Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Amortization of prior service credit cost	6	9	5
Other Nonoperating Income (Expense) | Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Amortization of prior service credit cost			1
Other Nonoperating Income (Expense) | Postretirement Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Amortization of prior service credit cost			1
Research and Development Expense
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Amortization of prior service credit cost		1
Research and Development Expense | Postretirement Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Amortization of prior service credit cost		1
Other Non-Operating Expense | Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Amortization of prior service credit cost	1	1
Other Non-Operating Expense | Postretirement Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Amortization of prior service credit cost	1	1
Revenue | Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Reclassification of unrealized loss on derivative hedge agreements into revenue	2	(19)	(5)
Revenue | Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Reclassification of unrealized loss on derivative hedge agreements into revenue	2	$ (19)	$ (5)
Cross Currency Swaps | Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Reclassification of unrealized loss on derivative hedge agreements into revenue	0
Cross Currency Swaps | Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Reclassification of unrealized loss on derivative hedge agreements into revenue	(11)
Cross Currency Swaps | Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Reclassification of unrealized loss on derivative hedge agreements into revenue	$ 11