Condensed Consolidating Supplemental Guarantor Information - Cash Flows (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net cash provided by (used in) operating activities	$ (24)	$ 39
Expenditures for property, plant and equipment	(29)	(11)
Additions to capitalized software	(42)	(41)
Proceeds from (payment of) of intercompany notes	0	0
Investments in equity affiliates		0
Other investing activities, net	(3)	(1)
Net cash used in investing activities	(74)	(53)
Short term borrowings, net	(1)	3
Payments on term credit facility	(34)	(11)
Payments on revolving credit facility	(498)	(195)
Borrowings on revolving credit facility	613	480
Repurchases of Company common stock	(165)	(350)
Proceeds from employee stock plans	5	3
Equity contribution		0
Borrowings (repayments from) intercompany notes	0	0
Tax withholding payments on behalf of employees	(11)	(22)
Net cash used in financing activities	(91)	(92)
Net cash used in operating activities	(4)	(3)
Effect of exchange rate changes on cash and cash equivalents	5	8
Decrease in cash, cash equivalents, and restricted cash	(188)	(101)
Cash, cash equivalents and restricted cash at beginning of period	543	507
Cash, cash equivalents and restricted cash at end of period	355	406
Eliminations
Net cash provided by (used in) operating activities	0	0
Expenditures for property, plant and equipment	0	0
Additions to capitalized software	0	0
Proceeds from (payment of) of intercompany notes	(179)	(23)
Investments in equity affiliates		2
Other investing activities, net	0	0
Net cash used in investing activities	(179)	(21)
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
Equity contribution		(2)
Borrowings (repayments from) intercompany notes	179	23
Tax withholding payments on behalf of employees	0	0
Net cash used in financing activities	179	21
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, 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	26	274
Expenditures for property, plant and equipment	(24)	(4)
Additions to capitalized software	(35)	(32)
Proceeds from (payment of) of intercompany notes	54	23
Investments in equity affiliates		(2)
Other investing activities, net	(3)	(1)
Net cash used in investing activities	(8)	(16)
Short term borrowings, net	(1)	0
Payments on term credit facility	(34)	(11)
Payments on revolving credit facility	(260)	(155)
Borrowings on revolving credit facility	375	240
Repurchases of Company common stock	(165)	(350)
Proceeds from employee stock plans	5	3
Equity contribution		0
Borrowings (repayments from) intercompany notes	0	0
Tax withholding payments on behalf of employees	(11)	(22)
Net cash used in financing activities	(91)	(295)
Net cash used in operating activities	(4)	(3)
Effect of exchange rate changes on cash and cash equivalents	0	0
Decrease in cash, cash equivalents, and restricted cash	(77)	(40)
Cash, cash equivalents and restricted cash at beginning of period	98	67
Cash, cash equivalents and restricted cash at end of period	21	27
Guarantor Subsidiary
Net cash provided by (used in) operating activities	(124)	1
Expenditures for property, plant and equipment	0	0
Additions to capitalized software	0	0
Proceeds from (payment of) of intercompany notes	125	0
Investments in equity affiliates		0
Other investing activities, net	0	0
Net cash used in investing activities	125	0
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
Equity contribution		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	1	1
Cash, cash equivalents and restricted cash at beginning of period	10	12
Cash, cash equivalents and restricted cash at end of period	11	13
Non-Guarantor Subsidiaries
Net cash provided by (used in) operating activities	74	(236)
Expenditures for property, plant and equipment	(5)	(7)
Additions to capitalized software	(7)	(9)
Proceeds from (payment of) of intercompany notes	0	0
Investments in equity affiliates		0
Other investing activities, net	0	0
Net cash used in investing activities	(12)	(16)
Short term borrowings, net	0	3
Payments on term credit facility	0
Payments on revolving credit facility	(238)	(40)
Borrowings on revolving credit facility	238	240
Repurchases of Company common stock	0	0
Proceeds from employee stock plans	0	0
Equity contribution		2
Borrowings (repayments from) intercompany notes	(179)	(23)
Tax withholding payments on behalf of employees	0	0
Net cash used in financing activities	(179)	182
Net cash used in operating activities	0	0
Effect of exchange rate changes on cash and cash equivalents	5	8
Decrease in cash, cash equivalents, and restricted cash	(112)	(62)
Cash, cash equivalents and restricted cash at beginning of period	435	428
Cash, cash equivalents and restricted cash at end of period	$ 323	$ 366