Leases (Future Minimum Lease Payments Under Non-Cancellable Leases) (Details) - USD ($) $ in Millions		Sep. 30, 2021	Dec. 31, 2020
Leases [Abstract]
Operating Leases, 2021 (excluding the nine months ended September 30, 2021)	[1]	$ 6
Operating Leases, 2022	[1]	22
Operating Leases, 2023	[1]	18
Operating Leases, 2024	[1]	14
Operating Leases, 2025	[1]	12
Operating Leases, Thereafter	[1]	74
Operating Leases, Total future minimum lease payments	[1]	145
Operating Leases, Less imputed interest	[1]	(35)
Operating Leases, Total	[1]	110
Finance Leases, 2021 (excluding the nine months ended September 30, 2021)		14
Finance Leases, 2022		35
Finance Leases, 2023		28
Finance Leases, 2024		19
Finance Leases, 2025		14
Finance Leases, Thereafter		10
Finance Leases, Total future minimum lease payments		120
Finance Leases, Less imputed interest		(6)
Finance Leases, Total	[2]	114	$ 95
Expected sublease income, amount expected each year		$ 3

[1] Each year is presented net of approximately $3 million of projected annual sublease income from formerly owned frontdoor, inc. and ServiceMaster Brands for their subleases of our headquarters.

[2] We have entered into a fleet management services agreement (the “Fleet Agreement”) which, among other things, allows us to obtain fleet vehicles through a leasing program. All leases under the Fleet Agreement are finance leases for accounting purposes. The lease rental payments include an interest component calculated using a variable rate based on one-month LIBOR plus other contractual adjustments and a borrowing margin ranging from 1.54% to 2.45%.