Leases (Lessee Components of Lease Expense) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Property leases
Operating lease expense	$ 161	$ 139
Variable lease expense	102	54
Total property lease expense	263	193
Minimum annual guaranteed rent in excess of concession fees, net	$ (7)	$ 19