Condensed Consolidating Supplemental Guarantor Information - Cash Flows (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Net cash provided by (used in) operating activities	$ 95	$ 134
Expenditures for property, plant and equipment	(70)	(43)
Additions to capitalized software	(86)	(84)
Proceeds from (payment of) of intercompany notes	0	0
Investments in equity affiliates		0
Other investing activities, net	(3)	0
Net cash used in investing activities	(159)	(127)
Short term borrowings, net	2	13
Payments on term credit facility	(34)	(25)
Payments on revolving credit facility	(1,013)	(615)
Borrowings on revolving credit facility	1,163	855
Repurchases of Company common stock	(210)	(350)
Proceeds from employee stock plans	11	8
Proceeds from (Payments for) Other Financing Activities	0	(1)
Equity contribution		0
Cash Dividends Paid to Parent Company by Consolidated Subsidiaries		0
Borrowings (repayments from) intercompany notes	0	0
Tax withholding payments on behalf of employees	(29)	(24)
Net cash used in financing activities	(110)	(139)
Net cash used in operating activities	(11)	(5)
Effect of exchange rate changes on cash and cash equivalents	(8)	12
Decrease in cash, cash equivalents, and restricted cash	(193)	(125)
Cash and Cash Equivalents, at Carrying Value	343	377	$ 537
Restricted Cash	7	5
Cash, cash equivalents and restricted cash at beginning of period	543	507
Cash, cash equivalents and restricted cash at end of period	350	382
Eliminations
Net cash provided by (used in) operating activities	0	(6)
Expenditures for property, plant and equipment	0	0
Additions to capitalized software	0	0
Proceeds from (payment of) of intercompany notes	(305)	(119)
Investments in equity affiliates		2
Other investing activities, net	0	0
Net cash used in investing activities	(305)	(117)
Short term borrowings, net	0	0
Payments on term credit facility	0	0
Payments on revolving credit facility	0	0
Borrowings on revolving credit facility	0	0
Repurchases of Company common stock	0	0
Proceeds from employee stock plans	0	0
Proceeds from (Payments for) Other Financing Activities		0
Equity contribution		(2)
Cash Dividends Paid to Parent Company by Consolidated Subsidiaries		6
Borrowings (repayments from) intercompany notes	305	119
Tax withholding payments on behalf of employees	0	0
Net cash used in financing activities	305	123
Net cash used in operating activities	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Decrease in cash, cash equivalents, and restricted cash	0	0
Cash and Cash Equivalents, at Carrying Value	0	0	0
Restricted Cash	0	0
Cash, cash equivalents and restricted cash at beginning of period	0	0
Cash, cash equivalents and restricted cash at end of period	0	0
Parent Issuer
Net cash provided by (used in) operating activities	105	306
Expenditures for property, plant and equipment	(57)	(26)
Additions to capitalized software	(71)	(67)
Proceeds from (payment of) of intercompany notes	160	99
Investments in equity affiliates		(2)
Other investing activities, net	(3)	(1)
Net cash used in investing activities	29	3
Short term borrowings, net	3	2
Payments on term credit facility	(34)	(23)
Payments on revolving credit facility	(660)	(575)
Borrowings on revolving credit facility	710	615
Repurchases of Company common stock	(210)	(350)
Proceeds from employee stock plans	11	8
Proceeds from (Payments for) Other Financing Activities		(1)
Equity contribution		0
Cash Dividends Paid to Parent Company by Consolidated Subsidiaries		0
Borrowings (repayments from) intercompany notes	0	0
Tax withholding payments on behalf of employees	(29)	(24)
Net cash used in financing activities	(209)	(348)
Net cash used in operating activities	(11)	(5)
Effect of exchange rate changes on cash and cash equivalents	0	0
Decrease in cash, cash equivalents, and restricted cash	(86)	(44)
Cash and Cash Equivalents, at Carrying Value	11	23	97
Restricted Cash	0	0
Cash, cash equivalents and restricted cash at beginning of period	97	67
Cash, cash equivalents and restricted cash at end of period	11	23
Guarantor Subsidiary
Net cash provided by (used in) operating activities	(150)	(22)
Expenditures for property, plant and equipment	0	0
Additions to capitalized software	0	0
Proceeds from (payment of) of intercompany notes	145	20
Investments in equity affiliates		0
Other investing activities, net	0	0
Net cash used in investing activities	145	20
Short term borrowings, net	0	0
Payments on term credit facility	0	0
Payments on revolving credit facility	0	0
Borrowings on revolving credit facility	0	0
Repurchases of Company common stock	0	0
Proceeds from employee stock plans	0	0
Proceeds from (Payments for) Other Financing Activities		0
Equity contribution		0
Cash Dividends Paid to Parent Company by Consolidated Subsidiaries		0
Borrowings (repayments from) intercompany notes	0	0
Tax withholding payments on behalf of employees	0	0
Net cash used in financing activities	0	0
Net cash used in operating activities	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Decrease in cash, cash equivalents, and restricted cash	(5)	(2)
Cash and Cash Equivalents, at Carrying Value	6	10	11
Restricted Cash	0	0
Cash, cash equivalents and restricted cash at beginning of period	11	12
Cash, cash equivalents and restricted cash at end of period	6	10
Non-Guarantor Subsidiaries
Net cash provided by (used in) operating activities	140	(144)
Expenditures for property, plant and equipment	(13)	(17)
Additions to capitalized software	(15)	(17)
Proceeds from (payment of) of intercompany notes	0	0
Investments in equity affiliates		0
Other investing activities, net	0	1
Net cash used in investing activities	(28)	(33)
Short term borrowings, net	(1)	11
Payments on term credit facility	0	(2)
Payments on revolving credit facility	(353)	(40)
Borrowings on revolving credit facility	453	240
Repurchases of Company common stock	0	0
Proceeds from employee stock plans	0	0
Proceeds from (Payments for) Other Financing Activities		0
Equity contribution		2
Cash Dividends Paid to Parent Company by Consolidated Subsidiaries		(6)
Borrowings (repayments from) intercompany notes	(305)	(119)
Tax withholding payments on behalf of employees	0	0
Net cash used in financing activities	(206)	86
Net cash used in operating activities	0	0
Effect of exchange rate changes on cash and cash equivalents	(8)	12
Decrease in cash, cash equivalents, and restricted cash	(102)	(79)
Cash and Cash Equivalents, at Carrying Value	326	344	$ 429
Restricted Cash	7	5
Cash, cash equivalents and restricted cash at beginning of period	435	428
Cash, cash equivalents and restricted cash at end of period	$ 333	$ 349