Condensed Consolidating Supplemental Guarantor Information Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net cash provided by (used in) operating activities	$ 894	$ 681	$ 524
Expenditures for property, plant and equipment	(73)	(79)	(118)
Proceeds from Sale of property, plant, and equipment	0	19	1
Additions to capitalized software	(154)	(150)	(140)
Business acquisitions, net	0	0	(1,647)
Proceeds from (payment of) of intercompany notes	0	0	0
Proceeds from divestiture	47	0	0
Investments in equity affiliates	0	0	0
Changes in restricted cash	0	0	1,114
Other investing activities, net	(9)	1	2
Net cash used in investing activities	189	209	788
Short term borrowings, net	(8)	8	0
Payments on term credit facilities	(97)	(383)	(37)
Borrowings on term credit facilities	0	0	250
Payments on revolving credit facilities	(1,431)	(1,694)	(1,050)
Borrowings on revolving credit facilities	1,331	1,698	1,146
Debt issuance costs	(9)	0	(5)
Tax withholding payments on behalf of employees	(16)	(16)	(28)
Proceeds from employee stock plans	15	15	13
Other financing activities			(5)
Dividend distribution to consolidated subsidiaries	0	0	0
Payments for Repurchase of Common Stock	250	0	0
Series A convertible preferred stock issuance, net of issuance costs of $26 million	0	794	0
Payments for tender offer share repurchase	0	1,005	0
Other financing activities	(2)	0	(5)
Equity contribution	0	0	0
Borrowings (repayments) of intercompany notes	0	0	0
Net cash provided by (used in) financing activities	(467)	(583)	284
Net cash used in discontinued operations operating activities	(39)	(43)	(1)
Effect of exchange rate changes on cash and cash equivalents	(29)	(29)	(36)
Decrease in cash and cash equivalents	170	(183)	(17)
Cash and cash equivalents	498	328	511	$ 528
Parent Company [Member]
Net cash provided by (used in) operating activities	272	346	405
Expenditures for property, plant and equipment	(31)	(22)	(54)
Proceeds from Sale of property, plant, and equipment	0	0	0
Additions to capitalized software	(95)	(91)	(82)
Business acquisitions, net			(1,647)
Proceeds from (payment of) of intercompany notes	409	272	42
Proceeds from divestiture	22
Investments in equity affiliates	(9)	(1)	(2)
Changes in restricted cash			1,114
Other investing activities, net	(9)	(6)	(5)
Net cash used in investing activities	(287)	(152)	(634)
Short term borrowings, net	(4)	3
Payments on term credit facilities	(89)	(376)	(34)
Borrowings on term credit facilities			250
Payments on revolving credit facilities	(1,151)	(729)	(946)
Borrowings on revolving credit facilities	1,051	829	946
Debt issuance costs	(9)		(4)
Tax withholding payments on behalf of employees	(16)	(16)	(28)
Proceeds from employee stock plans	15	15	13
Other financing activities			(1)
Dividend distribution to consolidated subsidiaries	0	0	0
Payments for Repurchase of Common Stock	250
Series A convertible preferred stock issuance, net of issuance costs of $26 million		794
Payments for tender offer share repurchase		1,005
Other financing activities	0
Equity contribution	0	0	0
Borrowings (repayments) of intercompany notes	(17)	0	0
Net cash provided by (used in) financing activities	(470)	(485)	196
Net cash used in discontinued operations operating activities	(39)	(43)	(1)
Effect of exchange rate changes on cash and cash equivalents	0	0	0
Decrease in cash and cash equivalents	50	(30)	(34)
Cash and cash equivalents	65	15	45	79
Guarantor Subsidiary [Member]
Net cash provided by (used in) operating activities	(160)	(335)	(108)
Expenditures for property, plant and equipment	0	0	0
Proceeds from Sale of property, plant, and equipment	0	0	0
Additions to capitalized software	0	0	0
Business acquisitions, net			0
Proceeds from (payment of) of intercompany notes	115	347	106
Proceeds from divestiture	0
Investments in equity affiliates	50	0	0
Changes in restricted cash			0
Other investing activities, net	0	0	0
Net cash used in investing activities	(165)	(347)	(106)
Short term borrowings, net	0	0
Payments on term credit facilities	0	0	0
Borrowings on term credit facilities			0
Payments on revolving credit facilities	0	0	0
Borrowings on revolving credit facilities	0	0	0
Debt issuance costs	0		0
Tax withholding payments on behalf of employees	0	0	0
Proceeds from employee stock plans	0	0	0
Other financing activities			0
Dividend distribution to consolidated subsidiaries	0	0	0
Payments for Repurchase of Common Stock	0
Series A convertible preferred stock issuance, net of issuance costs of $26 million		0
Payments for tender offer share repurchase		0
Other financing activities	0
Equity contribution	0	0	0
Borrowings (repayments) of intercompany notes	0	0	0
Net cash provided by (used in) financing activities	0	0	0
Net cash used in discontinued operations operating activities	0	0	0
Effect of exchange rate changes on cash and cash equivalents	(13)	(1)	0
Decrease in cash and cash equivalents	(8)	11	(2)
Cash and cash equivalents	12	20	9	11
Non-Guarantor Subsidiaries [Member]
Net cash provided by (used in) operating activities	785	747	322
Expenditures for property, plant and equipment	(42)	(57)	(64)
Proceeds from Sale of property, plant, and equipment	0	19	1
Additions to capitalized software	(59)	(59)	(58)
Business acquisitions, net			0
Proceeds from (payment of) of intercompany notes	0	0	0
Proceeds from divestiture	25
Investments in equity affiliates	0	0	0
Changes in restricted cash			0
Other investing activities, net	0	7	7
Net cash used in investing activities	76	90	114
Short term borrowings, net	(4)	5
Payments on term credit facilities	(8)	(7)	(3)
Borrowings on term credit facilities			0
Payments on revolving credit facilities	(280)	(965)	(104)
Borrowings on revolving credit facilities	280	869	200
Debt issuance costs	0		(1)
Tax withholding payments on behalf of employees	0	0	0
Proceeds from employee stock plans	0	0	0
Other financing activities			(4)
Dividend distribution to consolidated subsidiaries	(53)	(77)	(95)
Payments for Repurchase of Common Stock	0
Series A convertible preferred stock issuance, net of issuance costs of $26 million		0
Payments for tender offer share repurchase		0
Other financing activities	(2)
Equity contribution	9	1	2
Borrowings (repayments) of intercompany notes	(507)	(619)	(148)
Net cash provided by (used in) financing activities	(565)	(793)	(153)
Net cash used in discontinued operations operating activities	0	0	0
Effect of exchange rate changes on cash and cash equivalents	(16)	(28)	(36)
Decrease in cash and cash equivalents	128	(164)	19
Cash and cash equivalents	421	293	457	438
Consolidation, Eliminations [Member]
Net cash provided by (used in) operating activities	(3)	(77)	(95)
Expenditures for property, plant and equipment	0	0	0
Proceeds from Sale of property, plant, and equipment	0	0	0
Additions to capitalized software	0	0	0
Business acquisitions, net			0
Proceeds from (payment of) of intercompany notes	(524)	(619)	(148)
Proceeds from divestiture	0
Investments in equity affiliates	(41)	1	2
Changes in restricted cash			0
Other investing activities, net	0	0	0
Net cash used in investing activities	565	618	146
Short term borrowings, net	0	0
Payments on term credit facilities	0	0	0
Borrowings on term credit facilities			0
Payments on revolving credit facilities	0	0	0
Borrowings on revolving credit facilities	0	0	0
Debt issuance costs	0		0
Tax withholding payments on behalf of employees	0	0	0
Proceeds from employee stock plans	0	0	0
Other financing activities			0
Dividend distribution to consolidated subsidiaries	53	77	95
Payments for Repurchase of Common Stock	0
Series A convertible preferred stock issuance, net of issuance costs of $26 million		0
Payments for tender offer share repurchase		0
Other financing activities	0
Equity contribution	(9)	(1)	(2)
Borrowings (repayments) of intercompany notes	524	619	148
Net cash provided by (used in) financing activities	568	695	241
Net cash used in discontinued operations operating activities	0	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0	0
Decrease in cash and cash equivalents	0	0	0
Cash and cash equivalents	$ 0	$ 0	$ 0	$ 0