Other Assets (Share of equity income from investments) (Details) $ in Thousands, € in Millions	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2020 EUR (€)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Schedule of Equity Method Investments [Line Items]
Share of equity (loss) income from investments	$ (213,286)		$ 230,980	$ 210,756
Dividends received	2,215		$ 150,177	$ 243,101
TUI Cruises
Schedule of Equity Method Investments [Line Items]
Dividends received	$ 190,300	€ 170.0