Commitments and Contingencies - Guarantees (Details) $ in Millions	Sep. 30, 2021 USD ($)
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings	$ 224
Recorded Liability for Guarantees	125
Guarantees not in effect until underlying properties open	65
Debt service
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings	20
Recorded Liability for Guarantees	5
Operating profit
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings	186
Recorded Liability for Guarantees	116
Other
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings	18
Recorded Liability for Guarantees	$ 4