Revenue and Expense from Contracts with Customers (Textuals) (Details) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
|
Oct. 30, 2019
item
|
Dec. 31, 2019
USD ($)
item
|
Dec. 31, 2018
USD ($)
|
|
| Revenue, Initial Application Period Cumulative Effect Transition [Line Items] | |||
| Receivables from customers included in accounts receivables, net | $ 15.3 | $ 17.3 | |
| Advanced ticket sales | $ 1,400.0 | 1,200.0 | |
| Percentage of refundable amounts included within contract liabilities | 55.00% | ||
| Revenue recognized included in contract liability | $ 1,200.0 | ||
| Capacity of ship, berths | item | 58,400 | ||
| Contract costs incurred to obtain customers | $ 143.5 | 116.3 | |
| Contract costs to fulfill contracts with customers | $ 49.7 | $ 32.5 | |
| Norwegian Encore | |||
| Revenue, Initial Application Period Cumulative Effect Transition [Line Items] | |||
| Capacity of ship, berths | item | 4,000 | ||
| Percentage of capacity to fleet | 7.00% |