Condensed Consolidating Supplemental Guarantor Information - Cash Flows (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Net Cash Provided by (Used in) Operating Activities, Continuing Operations	$ 23	$ 79
Expenditures for property, plant and equipment	(9)	(13)
Additions to capitalized software	(31)	(38)
Proceeds from (payment of) of intercompany notes	0	0
Investments in equity affiliates	0
Other investing activities, net	(8)	(6)
Net cash used in investing activities	(48)	(57)
Tax withholding payments on behalf of employees	(6)	(9)
Short term borrowings, net	(9)	2
Payments on term credit facility	(56)	(19)
Payments on revolving credit facility	(180)	(273)
Borrowings on revolving credit facility	511	248
Payments for Repurchase of Common Stock	(213)	0
Debt issuance costs	(8)	0
Proceeds from employee stock plans	3	6
Equity contribution	0
Dividend distribution to consolidated subsidiaries		0
Borrowings (repayments from) intercompany notes	0	0
Net cash provided by financing activities	42	(45)
Net cash (used in) provided by operating activities	(12)	(4)
Effect of exchange rate changes on cash and cash equivalents	0	(22)
Increase (decrease) in cash and cash equivalents	5	(49)
Cash and cash equivalents	333	462	$ 328	$ 511
Parent Company [Member]
Net Cash Provided by (Used in) Operating Activities, Continuing Operations	184	(14)
Expenditures for property, plant and equipment	(3)	(4)
Additions to capitalized software	(18)	(21)
Proceeds from (payment of) of intercompany notes	17	52
Investments in equity affiliates	(6)
Other investing activities, net	(8)	(4)
Net cash used in investing activities	(18)	23
Tax withholding payments on behalf of employees	(6)	(9)
Short term borrowings, net	(4)	0
Payments on term credit facility	(56)	(17)
Payments on revolving credit facility	(100)	(98)
Borrowings on revolving credit facility	231	98
Payments for Repurchase of Common Stock	(213)
Debt issuance costs	(8)
Proceeds from employee stock plans	3	6
Equity contribution	0
Dividend distribution to consolidated subsidiaries		0
Borrowings (repayments from) intercompany notes	0	0
Net cash provided by financing activities	(153)	(20)
Net cash (used in) provided by operating activities	(12)	(4)
Effect of exchange rate changes on cash and cash equivalents	0	0
Increase (decrease) in cash and cash equivalents	1	(15)
Cash and cash equivalents	16	29	15	44
Guarantor Subsidiary [Member]
Net Cash Provided by (Used in) Operating Activities, Continuing Operations	(26)	(2)
Expenditures for property, plant and equipment	0	0
Additions to capitalized software	0	0
Proceeds from (payment of) of intercompany notes	30	10
Investments in equity affiliates	0
Other investing activities, net	0	0
Net cash used in investing activities	30	10
Tax withholding payments on behalf of employees	0	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
Payments for Repurchase of Common Stock	0
Debt issuance costs	0
Proceeds from employee stock plans	0	0
Equity contribution	0
Dividend distribution to consolidated subsidiaries		0
Borrowings (repayments from) intercompany notes	0	0
Net cash provided by financing activities	0	0
Net cash (used in) provided by operating activities	0	0
Effect of exchange rate changes on cash and cash equivalents	(2)	0
Increase (decrease) in cash and cash equivalents	2	8
Cash and cash equivalents	22	17	20	9
Non-Guarantor Subsidiaries [Member]
Net Cash Provided by (Used in) Operating Activities, Continuing Operations	(135)	136
Expenditures for property, plant and equipment	(6)	(9)
Additions to capitalized software	(13)	(17)
Proceeds from (payment of) of intercompany notes	0	0
Investments in equity affiliates	0
Other investing activities, net	0	(2)
Net cash used in investing activities	(19)	(28)
Tax withholding payments on behalf of employees	0	0
Short term borrowings, net	(5)	2
Payments on term credit facility	0	(2)
Payments on revolving credit facility	(80)	(175)
Borrowings on revolving credit facility	280	150
Payments for Repurchase of Common Stock	0
Debt issuance costs	0
Proceeds from employee stock plans	0	0
Equity contribution	6
Dividend distribution to consolidated subsidiaries		(41)
Borrowings (repayments from) intercompany notes	(47)	(62)
Net cash provided by financing activities	154	(128)
Net cash (used in) provided by operating activities	0	0
Effect of exchange rate changes on cash and cash equivalents	2	(22)
Increase (decrease) in cash and cash equivalents	2	(42)
Cash and cash equivalents	295	416	293	458
Consolidation, Eliminations [Member]
Net Cash Provided by (Used in) Operating Activities, Continuing Operations	0	(41)
Expenditures for property, plant and equipment	0	0
Additions to capitalized software	0	0
Proceeds from (payment of) of intercompany notes	(47)	(62)
Investments in equity affiliates	6
Other investing activities, net	0	0
Net cash used in investing activities	(41)	(62)
Tax withholding payments on behalf of employees	0	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
Payments for Repurchase of Common Stock	0
Debt issuance costs	0
Proceeds from employee stock plans	0	0
Equity contribution	(6)
Dividend distribution to consolidated subsidiaries		41
Borrowings (repayments from) intercompany notes	47	62
Net cash provided by financing activities	41	103
Net cash (used in) provided by operating activities	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents	$ 0	$ 0	$ 0	$ 0