Condensed Consolidating Supplemental Guarantor Information - Statement of Cash Flows (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Proceeds from Contributions from Parent	$ 0
Net cash provided by (used in) operating activities	71	$ 95
Investing activities
Expenditures for property, plant and equipment	(35)	(70)
Proceeds from sale of property, plant and equipment	11	0
Additions to capitalized software	(103)	(86)
Proceeds from (payments of) intercompany notes	0	0
Investments in equity affiliates	0
Business acquisitions, net	(12)	0
Other investing activities, net	5	(3)
Net cash used in investing activities	(134)	(159)
Financing activities
Short term borrowings, net	(4)	(2)
Payments on term credit facilities	(39)	(34)
Payments on revolving credit facilities	(914)	(1,013)
Borrowings on revolving credit facilities	897	1,163
Repurchases of Company common stock	0	(210)
Proceeds from employee stock plans	10	11
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Consolidated Subsidiaries	0
Borrowings (repayments) of intercompany notes	0	0
Tax withholding payments on behalf of employees	(16)	(29)
Net cash used in financing activities	(58)	(110)
Cash flows from discontinued operations
Net cash used in operating activities	(11)	(11)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	1	(8)
Decrease in cash, cash equivalents, and restricted cash	(131)	(193)
Cash, cash equivalents and restricted cash at beginning of period	476	543
Cash, cash equivalents and restricted cash at end of period	345	350
Reconciliation of cash, cash equivalents and restricted cash as shown in the Condensed Consolidated Statements of Cash Flows
Cash and cash equivalents			$ 335	$ 464	$ 343
Restricted cash included in other assets			10		7
Total cash, cash equivalents and restricted cash	476	543	345	476	350
Eliminations
Proceeds from Contributions from Parent	98
Net cash provided by (used in) operating activities	(1)	0
Investing activities
Expenditures for property, plant and equipment	0	0
Proceeds from sale of property, plant and equipment	0
Additions to capitalized software	0	0
Proceeds from (payments of) intercompany notes	(336)	(305)
Investments in equity affiliates	(98)
Business acquisitions, net	0
Other investing activities, net	0	0
Net cash used in investing activities	(434)	(305)
Financing activities
Short term borrowings, net	0	0
Payments on term credit facilities	0	0
Payments on revolving credit facilities	0	0
Borrowings on revolving credit facilities	0	0
Repurchases of Company common stock		0
Proceeds from employee stock plans	0	0
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Consolidated Subsidiaries	1
Borrowings (repayments) of intercompany notes	336	305
Tax withholding payments on behalf of employees	0	0
Net cash used in financing activities	435	305
Cash flows from discontinued operations
Net cash used in operating activities	0	0
Effect of exchange rate changes on cash, cash equivalents and restricted cash	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
Reconciliation of cash, cash equivalents and restricted cash as shown in the Condensed Consolidated Statements of Cash Flows
Cash and cash equivalents			0	0	0
Restricted cash included in other assets			0		0
Total cash, cash equivalents and restricted cash	0	0	0	0	0
Parent Issuer
Proceeds from Contributions from Parent	(84)
Net cash provided by (used in) operating activities	230	105
Investing activities
Expenditures for property, plant and equipment	(17)	(57)
Proceeds from sale of property, plant and equipment	3
Additions to capitalized software	(93)	(71)
Proceeds from (payments of) intercompany notes	47	160
Investments in equity affiliates	0
Business acquisitions, net	(12)
Other investing activities, net	5	(3)
Net cash used in investing activities	(67)	29
Financing activities
Short term borrowings, net	(4)	(3)
Payments on term credit facilities	(39)	(34)
Payments on revolving credit facilities	(800)	(660)
Borrowings on revolving credit facilities	780	710
Repurchases of Company common stock		(210)
Proceeds from employee stock plans	10	11
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Consolidated Subsidiaries	0
Borrowings (repayments) of intercompany notes	0	0
Tax withholding payments on behalf of employees	(16)	(29)
Net cash used in financing activities	(145)	(209)
Cash flows from discontinued operations
Net cash used in operating activities	(11)	(11)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	0	0
Decrease in cash, cash equivalents, and restricted cash	7	(86)
Cash, cash equivalents and restricted cash at beginning of period	12	97
Cash, cash equivalents and restricted cash at end of period	19	11
Reconciliation of cash, cash equivalents and restricted cash as shown in the Condensed Consolidated Statements of Cash Flows
Cash and cash equivalents			18	6	11
Restricted cash included in other assets			1		0
Total cash, cash equivalents and restricted cash	12	97	19	12	11
Guarantor Subsidiary
Proceeds from Contributions from Parent	(14)
Net cash provided by (used in) operating activities	(208)	(150)
Investing activities
Expenditures for property, plant and equipment	0	0
Proceeds from sale of property, plant and equipment	0
Additions to capitalized software	0	0
Proceeds from (payments of) intercompany notes	255	145
Investments in equity affiliates	0
Business acquisitions, net	0
Other investing activities, net	0	0
Net cash used in investing activities	255	145
Financing activities
Short term borrowings, net	0	0
Payments on term credit facilities	0	0
Payments on revolving credit facilities	0	0
Borrowings on revolving credit facilities	0	0
Repurchases of Company common stock		0
Proceeds from employee stock plans	0	0
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Consolidated Subsidiaries	0
Borrowings (repayments) of intercompany notes	(34)	0
Tax withholding payments on behalf of employees	0	0
Net cash used in financing activities	(48)	0
Cash flows from discontinued operations
Net cash used in operating activities	0	0
Effect of exchange rate changes on cash, cash equivalents and restricted cash	0	0
Decrease in cash, cash equivalents, and restricted cash	(1)	(5)
Cash, cash equivalents and restricted cash at beginning of period	3	11
Cash, cash equivalents and restricted cash at end of period	2	6
Reconciliation of cash, cash equivalents and restricted cash as shown in the Condensed Consolidated Statements of Cash Flows
Cash and cash equivalents			2	8	6
Restricted cash included in other assets			0		0
Total cash, cash equivalents and restricted cash	3	11	2	3	6
Non-Guarantor Subsidiaries
Proceeds from Contributions from Parent	0
Net cash provided by (used in) operating activities	50	140
Investing activities
Expenditures for property, plant and equipment	(18)	(13)
Proceeds from sale of property, plant and equipment	8
Additions to capitalized software	(10)	(15)
Proceeds from (payments of) intercompany notes	34	0
Investments in equity affiliates	98
Business acquisitions, net	0
Other investing activities, net	0	0
Net cash used in investing activities	112	(28)
Financing activities
Short term borrowings, net	0	1
Payments on term credit facilities	0	0
Payments on revolving credit facilities	(114)	(353)
Borrowings on revolving credit facilities	117	453
Repurchases of Company common stock		0
Proceeds from employee stock plans	0	0
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Consolidated Subsidiaries	(1)
Borrowings (repayments) of intercompany notes	(302)	(305)
Tax withholding payments on behalf of employees	0	0
Net cash used in financing activities	(300)	(206)
Cash flows from discontinued operations
Net cash used in operating activities	0	0
Effect of exchange rate changes on cash, cash equivalents and restricted cash	1	(8)
Decrease in cash, cash equivalents, and restricted cash	(137)	(102)
Cash, cash equivalents and restricted cash at beginning of period	461	435
Cash, cash equivalents and restricted cash at end of period	324	333
Reconciliation of cash, cash equivalents and restricted cash as shown in the Condensed Consolidated Statements of Cash Flows
Cash and cash equivalents			315	450	326
Restricted cash included in other assets			9		7
Total cash, cash equivalents and restricted cash	$ 461	$ 435	$ 324	$ 461	$ 333