Other Liabilities - Other Long-term Liabilities (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Other Liabilities Disclosure [Abstract]
Other long-term tax liabilities		$ 400	$ 369
Pension obligations		143	134
Deferred employee compensation and benefits		116	118
Insurance reserves	[1]	189	178
Other		141	84
Other long-term liabilities		$ 989	$ 883

[1] The long-term portion of obligations related to insurance claims are expected to be satisfied, on average, over the next three years.