Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Other Comprehensive Income (Loss) [Abstract]
Translation Adjustments Gains (Losses), pre-tax		$ 14	$ (22)	$ 26	$ (15)
Translation Adjustments Gains (Losses), Net of Tax	[1]	14	(22)	26	(15)
Changes in fair value of cash flow hedges - gains, pre-tax		0	(1)	2	1
Changes in fair value of cash flow hedges - gains, net of tax		(1)	(1)	1	0
Changes in cash flow hedges reclassed to earnings, pre-tax	[2]	0	0	1	1
Changes in cash flow hedges reclassed to earnings, net of tax	[2]	1	0	1	1
Net Unrealized Gains, pre-tax		0	(1)	3	2
Net Unrealized Gains, Net of Tax	[1]	0	(1)	2	1
Actuarial loss amortization/settlement, pre-tax		1	0	2	0
Actuarial loss amortization/settlement, net of tax		1	0	2	0
Other gains, pre-tax		(2)	1	(2)	1
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax		(2)	1	(2)	1
Change in Defined Benefit Plans (Losses) Gains, Pre-tax		(1)	1	0	1
Change in Defined Benefit Plans (Losses) Gains, Net of Tax	[1]	(1)	1	0	1
Other Comprehensive Income (Loss), pre-tax		13	(22)	29	(12)
Other Comprehensive Income (Loss), Net of Tax	[1]	13	$ (22)	28	$ (13)
Cumulative translation adjustments		(446)		(446)		$ (472)
Other unrealized losses, net		1		1		(1)
Benefit plans net actuarial losses and prior service credits		(53)		(53)		(53)
Total Accumulated Other Comprehensive Loss		$ (498)		$ (498)		$ (526)

[1] Refer to Note 10 - Other Comprehensive Income (Loss) for gross components of Other Comprehensive Income (Loss), reclassification adjustments out of Accumulated Other Comprehensive Loss and related tax effects.

[2] Reclassified to Cost of outsourcing. Refer to Note 7 - Financial Instruments for additional information regarding our cash flow hedges.