Condensed Consolidating Guarantor Information Cash Flows (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012
Net cash provided by (used in) operating activities	$ 31	$ 21
Expenditures for property, plant and equipment	32	24
Additions to capitalized software	34	21
Business acquisitions, net of cash acquired	1,642	681
Proceeds from (payment of) of intercompany notes		0
Investments in equity affiliates	0	0
Changes in restricted cash	1,114	0
Other investing activities, net	4	(5)
Net cash used in investing activities	(598)	(721)
Tax witholding payments on behalf of employees	22	25
Proceeds from employee stock plans	5	18
Equity contribution	0	0
Short term borrowings, net	6	1
Borrowings on term credit facility	250	0
Payments on term credit facility	0	(18)
Payments on revolving credit facility	60	420
Borrowings on revolving credit facility	400	565
Debt issuance costs	(2)	(2)
Dividend distribution to consolidated subsidiaries	0	0
Borrowings (repayments) of intercompany notes		0
Net cash provided by (used in) financing activities	576	119
Other financing activities	(1)	0
Net cash (used in) provided by operating activities	(16)	1
Effect of exchange rate changes on cash and cash equivalents	(6)	(6)
Decrease in cash and cash equivalents	(13)	(586)
Cash and cash equivalents	515	483	528	1,069
Parent Company [Member]
Net cash provided by (used in) operating activities	(16)	(31)
Expenditures for property, plant and equipment	15	4
Additions to capitalized software	21	16
Business acquisitions, net of cash acquired	1,642	9
Proceeds from (payment of) of intercompany notes		322
Investments in equity affiliates	1	274
Changes in restricted cash	1,114
Other investing activities, net	1	(4)
Net cash used in investing activities	(566)	(621)
Tax witholding payments on behalf of employees	22	25
Proceeds from employee stock plans	5	18
Equity contribution	0	0
Short term borrowings, net	0	0
Borrowings on term credit facility	250
Payments on term credit facility		(18)
Payments on revolving credit facility	60	420
Borrowings on revolving credit facility	400	565
Debt issuance costs	(2)	(2)
Dividend distribution to consolidated subsidiaries	0	0
Borrowings (repayments) of intercompany notes		0
Net cash provided by (used in) financing activities	571	118
Other financing activities	0
Net cash (used in) provided by operating activities	(16)	1
Effect of exchange rate changes on cash and cash equivalents	0	0
Decrease in cash and cash equivalents	(27)	(533)
Cash and cash equivalents	48	38	75	571
Guarantor Subsidiary [Member]
Net cash provided by (used in) operating activities	(3)	3
Expenditures for property, plant and equipment	0	0
Additions to capitalized software	0	0
Business acquisitions, net of cash acquired	0	0
Proceeds from (payment of) of intercompany notes		0
Investments in equity affiliates	0	0
Changes in restricted cash	0
Other investing activities, net	0	0
Net cash used in investing activities	0	0
Tax witholding payments on behalf of employees	0	0
Proceeds from employee stock plans	0	0
Equity contribution	0	0
Short term borrowings, net	0	0
Borrowings on term credit facility	0
Payments on term credit facility		0
Payments on revolving credit facility	0	0
Borrowings on revolving credit facility	0	0
Debt issuance costs	0	0
Dividend distribution to consolidated subsidiaries	0	0
Borrowings (repayments) of intercompany notes		0
Net cash provided by (used in) financing activities	0	0
Other financing activities	0
Net cash (used in) provided by operating activities	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Decrease in cash and cash equivalents	(3)	3
Cash and cash equivalents	8	9	11	6
Non-Guarantor Subsidiaries [Member]
Net cash provided by (used in) operating activities	79	76
Expenditures for property, plant and equipment	17	20
Additions to capitalized software	13	5
Business acquisitions, net of cash acquired	0	672
Proceeds from (payment of) of intercompany notes		0
Investments in equity affiliates	0	0
Changes in restricted cash	0
Other investing activities, net	3	(1)
Net cash used in investing activities	(33)	(696)
Tax witholding payments on behalf of employees	0	0
Proceeds from employee stock plans	0	0
Equity contribution	1	274
Short term borrowings, net	6	1
Borrowings on term credit facility	0
Payments on term credit facility		0
Payments on revolving credit facility	0	0
Borrowings on revolving credit facility	0	0
Debt issuance costs	0	0
Dividend distribution to consolidated subsidiaries	(29)	(27)
Borrowings (repayments) of intercompany notes		322
Net cash provided by (used in) financing activities	(23)	570
Other financing activities	(1)
Net cash (used in) provided by operating activities	0	0
Effect of exchange rate changes on cash and cash equivalents	(6)	(6)
Decrease in cash and cash equivalents	17	(56)
Cash and cash equivalents	459	436	442	492
Consolidation, Eliminations [Member]
Net cash provided by (used in) operating activities	(29)	(27)
Expenditures for property, plant and equipment	0	0
Additions to capitalized software	0	0
Business acquisitions, net of cash acquired	0	0
Proceeds from (payment of) of intercompany notes		(322)
Investments in equity affiliates	(1)	(274)
Changes in restricted cash	0
Other investing activities, net	0	0
Net cash used in investing activities	1	596
Tax witholding payments on behalf of employees	0	0
Proceeds from employee stock plans	0	0
Equity contribution	(1)	(274)
Short term borrowings, net	0	0
Borrowings on term credit facility	0
Payments on term credit facility		0
Payments on revolving credit facility	0	0
Borrowings on revolving credit facility	0	0
Debt issuance costs	0	0
Dividend distribution to consolidated subsidiaries	29	27
Borrowings (repayments) of intercompany notes		(322)
Net cash provided by (used in) financing activities	28	(569)
Other financing activities	0
Net cash (used in) provided by 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