Fair Value Measurements and Derivatives - Effects of Cash Flow Hedge Accounting on Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Derivative Instruments, Gain (Loss) [Line Items]
Fuel	$ 1,456,847	$ 1,454,755	$ 2,760,785	$ 2,842,178
Depreciation and amortization	243,760	222,405	475,057	445,334
Interest expense, net	260,013	205,765	504,235	453,183
Other income (expense), net	(167,729)	151,323	77,457	165,874
Amount of Gain (Loss) Recognized in Other Comprehensive Loss	22,076	1,157	52,901	48,410
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense)	(11,044)	3,150	(15,117)	6,483
Fuel
Derivative Instruments, Gain (Loss) [Line Items]
Fuel	157,377	174,964	332,391	372,698
Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Loss	22,076	1,157	52,901	48,410
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense)	(11,044)	3,150	(15,117)	6,483
Cash Flow Hedging \| Fuel
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense)	(6,147)	6,838	(5,857)	13,415
Cash Flow Hedging \| Other income (expense), net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense)	(777)	432	(1,021)	1,307
Cash Flow Hedging \| Depreciation and amortization
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense)	(4,120)	(4,120)	(8,239)	(8,239)
Cash Flow Hedging \| Fuel contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Loss	(27,268)	1,035	(16,596)	48,288
Cash Flow Hedging \| Fuel contracts \| Fuel
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense)	(6,147)	6,838	(5,857)	13,415
Cash Flow Hedging \| Fuel contracts \| Other income (expense), net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (gain) loss reclassified from accumulated other comprehensive income (loss) into income (expense) as a result that a forecasted transaction is no longer probable of occurring	(777)	432	(1,021)	1,307
Cash Flow Hedging \| Foreign currency contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Loss	49,344	122	69,497	122
Cash Flow Hedging \| Foreign currency contracts \| Depreciation and amortization
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense)	$ (4,120)	$ (4,120)	$ (8,239)	$ (8,239)

NCL CORP Ltd. 10-Q