Fair Value Measurements and Derivatives (Details) T in Thousands, $ in Millions	3 Months Ended
Mar. 31, 2024 USD ($) T	Dec. 31, 2023 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of long-term debt	$ 13,300.0	$ 13,500.0
Fair value of long-term debt in excess of carrying value	$ 900.0	$ 1,000.0
Fuel contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative maturing date	Dec. 31, 2025
Not Designated as Hedging Instrument \| Fuel contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative maturing date	Dec. 31, 2024
Projected fuel purchases \| T	4
Designated as Hedging Instrument \| Fuel contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Projected fuel purchases \| T	630
NCLH \| Exchangeable Senior Notes Due 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notional amount of derivatives	$ 10.7
NCLH \| Exchangeable Senior Notes Due 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notional amount of derivatives	24.0
NCLH \| 1.125% Exchangeable Senior Notes Due 2027
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notional amount of derivatives	34.1
NCLH \| 2.5% Exchangeable Senior Notes Due 2027
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notional amount of derivatives	$ 13.7

Date derivative contract ends, in YYYY-MM-DD format.

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