Condensed Consolidating Guarantor Financial Information - Statements of Cash Flows (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018
Operating Activities
Net cash provided by (used in) operating activities	$ 148	$ (205)
Investing Activities
Capital expenditures for property and equipment	(25)	(29)
Software capitalization costs	(19)	(12)
Return of investment from unconsolidated affiliates		11
Investments in unconsolidated affiliates	(2)	(5)
Net cash used in investing activities	(46)	(35)
Financing Activities
Issuance of debt	455	215
Issuance of non-recourse debt	365	663
Repayment of debt	(272)	(168)
Repayment of non-recourse debt	(327)	(436)
Debt issuance costs	(6)	(6)
Repurchase and retirement of common stock	(283)	(112)
Payment of withholding taxes on vesting of restricted stock units	(3)	(4)
Capital contribution		3
Proceeds from employee stock plan purchases	2
Other financing activity	(2)
Net cash (used in) provided by financing activities	(71)	155
Net increase (decrease) in cash, cash equivalents and restricted cash	31	(85)
Cash, cash equivalents and restricted cash, beginning of period	180	297
Cash, cash equivalents and restricted cash, end of period	211	212
Eliminations
Operating Activities
Net cash provided by (used in) operating activities	(281)	46
Investing Activities
Dividends from subsidiary	(562)
Net cash used in investing activities	(562)
Financing Activities
Intercompany transfers	843	(46)
Net cash (used in) provided by financing activities	843	(46)
Cash, cash equivalents and restricted cash, beginning of period	0	0
Cash, cash equivalents and restricted cash, end of period	0	0
Parent
Investing Activities
Dividends from subsidiary	281
Net cash used in investing activities	281
Financing Activities
Repurchase and retirement of common stock	(283)
Net cash (used in) provided by financing activities	(283)
Net increase (decrease) in cash, cash equivalents and restricted cash	(2)
Cash, cash equivalents and restricted cash, beginning of period	4	0
Cash, cash equivalents and restricted cash, end of period	2	0
Issuers
Operating Activities
Net cash provided by (used in) operating activities	248	(20)
Investing Activities
Dividends from subsidiary	281
Net cash used in investing activities	281
Financing Activities
Issuance of debt	455	215
Repayment of debt	(272)	(168)
Repurchase and retirement of common stock		(112)
Payment of withholding taxes on vesting of restricted stock units		(4)
Capital contribution		3
Intercompany transfers	(712)	86
Net cash (used in) provided by financing activities	(529)	20
Cash, cash equivalents and restricted cash, beginning of period	0	0
Cash, cash equivalents and restricted cash, end of period	0	0
Guarantors
Operating Activities
Net cash provided by (used in) operating activities	(50)	10
Investing Activities
Capital expenditures for property and equipment	(22)	(25)
Software capitalization costs	(19)	(12)
Return of investment from unconsolidated affiliates		11
Investments in unconsolidated affiliates	(2)	(5)
Net cash used in investing activities	(43)	(31)
Financing Activities
Payment of withholding taxes on vesting of restricted stock units	(3)
Proceeds from employee stock plan purchases	2
Other financing activity	(2)
Intercompany transfers	89	(63)
Net cash (used in) provided by financing activities	86	(63)
Net increase (decrease) in cash, cash equivalents and restricted cash	(7)	(84)
Cash, cash equivalents and restricted cash, beginning of period	134	259
Cash, cash equivalents and restricted cash, end of period	127	175
Non-Guarantors
Operating Activities
Net cash provided by (used in) operating activities	231	(241)
Investing Activities
Capital expenditures for property and equipment	(3)	(4)
Net cash used in investing activities	(3)	(4)
Financing Activities
Issuance of non-recourse debt	365	663
Repayment of non-recourse debt	(327)	(436)
Debt issuance costs	(6)	(6)
Intercompany transfers	(220)	23
Net cash (used in) provided by financing activities	(188)	244
Net increase (decrease) in cash, cash equivalents and restricted cash	40	(1)
Cash, cash equivalents and restricted cash, beginning of period	42	38
Cash, cash equivalents and restricted cash, end of period	$ 82	$ 37

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The cash outflow associated with the development, modification or acquisition of software programs or applications for internal use (that is, not to be sold, leased or otherwise marketed to others) that qualify for capitalization.

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Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement.

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