Commitments and Contingencies - Guarantees (Details) $ in Millions	Jun. 30, 2020 USD ($)
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings	$ 277
Recorded Liability for Guarantees	142
Guarantees not in effect until underlying properties open	78
Debt service
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings	53
Recorded Liability for Guarantees	6
Operating profit
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings	207
Recorded Liability for Guarantees	132
Other
Commitments and Contingencies Disclosure [Line Items]
Maximum Potential Amount of Future Fundings	17
Recorded Liability for Guarantees	$ 4