Revenue (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Capitalized Contract Cost [Line Items]
Total revenues	$ 13,900	$ 8,840	$ 1,532
Contract liabilities	2,600	1,800
Customer deposit	371
Contract assets	167	168
Commission, transportation and other
Capitalized Contract Cost [Line Items]
Capitalized contract costs	257	178
Port Costs
Capitalized Contract Cost [Line Items]
Total revenues	$ 896	$ 639	$ 105
Minimum
Capitalized Contract Cost [Line Items]
Duration of cruises	2 days
Maximum
Capitalized Contract Cost [Line Items]
Duration of cruises	24 days