Condensed Consolidating Supplemental Guarantor Information Cash Flows (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Net cash provided by (used in) operating activities	$ 79	$ 31
Expenditures for property, plant and equipment	(13)	(32)
Additions to capitalized software	(38)	(34)
Business acquisitions, net	0	(1,642)
Proceeds from (payment of) of intercompany notes	0
Changes in restricted cash	0	1,114
Investments in equity affiliates		0
Other investing activities, net	(6)	(4)
Net cash used in investing activities	(57)	(598)
Tax withholding payments on behalf of employees	(9)	(22)
Short term borrowings, net	2	6
Payments on term credit facility	(19)	0
Borrowings on term credit facility	0	250
Payments on revolving credit facility	(273)	(60)
Borrowings on revolving credit facility	248	400
Debt issuance costs	0	(2)
Proceeds from employee stock plans	6	5
Other financing activities	0	(1)
Borrowings (repayments) of intercompany notes		0
Dividend distribution to consolidated subsidiaries	0	0
Net cash provided by (used in) financing activities	(45)	576
Net cash provided by (used in) operating activities	(4)	(16)
Effect of exchange rate changes on cash and cash equivalents	(22)	(6)
Decrease in cash and cash equivalents	(49)	(13)
Cash and cash equivalents	462	515	511	528
Parent Company [Member]
Net cash provided by (used in) operating activities	(16)	(16)
Expenditures for property, plant and equipment	(4)	(15)
Additions to capitalized software	(21)	(21)
Business acquisitions, net		(1,642)
Proceeds from (payment of) of intercompany notes	52
Changes in restricted cash		1,114
Investments in equity affiliates		(1)
Other investing activities, net	(4)	(1)
Net cash used in investing activities	23	(566)
Tax withholding payments on behalf of employees	(9)	(22)
Short term borrowings, net	0	0
Payments on term credit facility	(17)
Borrowings on term credit facility		250
Payments on revolving credit facility	(98)	(60)
Borrowings on revolving credit facility	98	400
Debt issuance costs		(2)
Proceeds from employee stock plans	6	5
Other financing activities	0	0
Borrowings (repayments) of intercompany notes		0
Dividend distribution to consolidated subsidiaries	0	0
Net cash provided by (used in) financing activities	(20)	571
Net cash provided by (used in) operating activities	(4)	(16)
Effect of exchange rate changes on cash and cash equivalents	0	0
Decrease in cash and cash equivalents	(17)	(27)
Cash and cash equivalents	23	48	40	75
Guarantor Subsidiary [Member]
Net cash provided by (used in) operating activities	(2)	(3)
Expenditures for property, plant and equipment	0	0
Additions to capitalized software	0	0
Business acquisitions, net
Proceeds from (payment of) of intercompany notes	10
Changes in restricted cash		0
Investments in equity affiliates		0
Other investing activities, net	0	0
Net cash used in investing activities	10	0
Tax withholding payments on behalf of employees	0	0
Short term borrowings, net	0	0
Payments on term credit facility	0
Borrowings on term credit facility		0
Payments on revolving credit facility	0	0
Borrowings on revolving credit facility	0	0
Debt issuance costs		0
Proceeds from employee stock plans	0	0
Other financing activities	0	0
Borrowings (repayments) of intercompany notes		0
Dividend distribution to consolidated subsidiaries	0	0
Net cash provided by (used in) financing activities	0	0
Net cash provided by (used in) operating activities	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Decrease in cash and cash equivalents	8	(3)
Cash and cash equivalents	17	8	9	11
Non-Guarantor Subsidiaries [Member]
Net cash provided by (used in) operating activities	138	79
Expenditures for property, plant and equipment	(9)	(17)
Additions to capitalized software	(17)	(13)
Business acquisitions, net		0
Proceeds from (payment of) of intercompany notes	0
Changes in restricted cash		0
Investments in equity affiliates		0
Other investing activities, net	(2)	(3)
Net cash used in investing activities	(28)	(33)
Tax withholding payments on behalf of employees	0	0
Short term borrowings, net	2	6
Payments on term credit facility	(2)
Borrowings on term credit facility		0
Payments on revolving credit facility	(175)	0
Borrowings on revolving credit facility	150	0
Debt issuance costs		0
Proceeds from employee stock plans	0	0
Other financing activities	(62)	(1)
Borrowings (repayments) of intercompany notes		1
Dividend distribution to consolidated subsidiaries	(41)	(29)
Net cash provided by (used in) financing activities	(128)	(23)
Net cash provided by (used in) operating activities	0	0
Effect of exchange rate changes on cash and cash equivalents	(22)	(6)
Decrease in cash and cash equivalents	(40)	17
Cash and cash equivalents	422	459	462	442
Consolidation, Eliminations [Member]
Net cash provided by (used in) operating activities	(41)	(29)
Expenditures for property, plant and equipment	0	0
Additions to capitalized software	0	0
Business acquisitions, net		0
Proceeds from (payment of) of intercompany notes	(62)
Changes in restricted cash		0
Investments in equity affiliates		1
Other investing activities, net	0	0
Net cash used in investing activities	(62)	1
Tax withholding payments on behalf of employees	0	0
Short term borrowings, net	0	0
Payments on term credit facility	0
Borrowings on term credit facility		0
Payments on revolving credit facility	0	0
Borrowings on revolving credit facility	0	0
Debt issuance costs		0
Proceeds from employee stock plans	0	0
Other financing activities	62	0
Borrowings (repayments) of intercompany notes		(1)
Dividend distribution to consolidated subsidiaries	41	29
Net cash provided by (used in) financing activities	103	28
Net cash provided by (used in) operating activities	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Decrease in cash and cash equivalents	0	0
Cash and cash equivalents	$ 0	$ 0	$ 0	$ 0