Debt (Interest Expense Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Debt Instrument [Line Items]
Interest expense	$ 63	$ 64	$ 189	$ 183
Capitalized Interest Costs, Including Allowance for Funds Used During Construction	1	1	1	1
Consumer financing interest	$ 35	$ 29	101	81
Debt
Debt Instrument [Line Items]
Cash paid for interest			187	174
Non-Recourse Vacation Ownership Debt [Member]
Debt Instrument [Line Items]
Cash paid for interest			$ 84	$ 65