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Debt - Long-term Debt (Details) - USD ($) $ in Millions	6 Months Ended
Debt - Long-term Debt (Details) - USD ($) $ in Millions	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024	Aug. 31, 2018
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ (21)		$ (28)
Total debt	3,954	$ 4,321
Finance lease liability	255		0
Total debt	4,209		4,321
Less current portion of long-term debt and finance lease liability	61		44
Total long-term debt and finance lease liability	4,148		4,277
New Corporate Headquarters
Debt Instrument [Line Items]
Finance lease liability	255
Securitization Facility
Debt Instrument [Line Items]
Proceeds from facility	125	170
Repayment of revolving credit facility	125	$ 50
Line of Credit \| Term Loan B due 2027
Debt Instrument [Line Items]
Long-term debt, gross	$ 2,288		2,593
Line of Credit \| Secured Debt
Debt Instrument [Line Items]
Basis spread on variable rate	1.25%
Proceeds from facility	$ 125
Repayment of revolving credit facility	125
Line of Credit \| Secured Debt \| Incremental Term Facility due 2028
Debt Instrument [Line Items]
Long-term debt, gross	341		370
Line of Credit \| Secured Debt \| Incremental Term Facility due 2029
Debt Instrument [Line Items]
Long-term debt, gross	173		187
Line of Credit \| Secured Debt \| Incremental Term Facility due 2031
Debt Instrument [Line Items]
Long-term debt, gross	323		349
Line of Credit \| Secured Debt \| Securitization Facility
Debt Instrument [Line Items]
Long-term debt, gross	100		100
Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt, gross	0		0
Borrowing capacity	$ 750
Basis spread on variable rate	1.60%
Proceeds from facility	$ 125
Senior Notes \| Senior Notes due 2028
Debt Instrument [Line Items]
Interest rate	4.90%			4.90%
Long-term debt, gross	$ 750		$ 750
Effective interest rate	6.65%