Prepaid Expenses and Other Assets (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Equipment	$ 53	$ 300
Insurance	29	18
Advertising reimbursements	21	11
Income taxes	3	4
Other	60	42
Prepaid expenses and other assets	$ 166	$ 375