CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Operating Activities
Net Loss		$ (1,131,722)	$ (1,437,035)
Adjustments:
Depreciation and amortization		310,166	324,330
Impairment and credit losses		(449)	1,108,118
Net deferred income tax (benefit) expense		(3,556)	253
Loss on derivative instruments not designated as hedges		491	120,765
Share-based compensation expense (income)		18,834	(7,428)
Equity investment loss		59,871	10,392
Amortization of debt issuance costs		35,581	7,795
Amortization of debt discounts and premiums		29,304	8,624
Change in fair value of contingent consideration		0	(51,019)
Changes in operating assets and liabilities:
(Increase) decrease in trade and other receivables, net		(72,397)	84,578
Increase in inventories		(3,708)	(15,598)
(Increase) decrease in prepaid expenses and other assets		(26,118)	24,476
(Decrease) increase in accounts payable		(7,499)	851,342
(Decrease) increase in accrued interest		(15,726)	44,648
(Decrease) increase in accrued expenses and other liabilities		(134,113)	110,440
Increase (decrease) in customer deposits		95,923	(959,555)
Dividends received from unconsolidated affiliates	[1]	0	1,991
Other, net		35,935	(28,407)
Net cash (used) provided by operating activities		(809,183)	198,710
Investing Activities
Purchases of property and equipment		(1,061,691)	(1,252,554)
Cash received on settlement of derivative financial instruments		3,758	1,132
Cash paid on settlement of derivative financial instruments		(27,362)	(96,575)
Investments in and loans to unconsolidated affiliates		(70,369)	(2,000)
Cash received on loans to unconsolidated affiliates		12,519	5,160
Proceeds from the sale of property and equipment and other assets		175,439	5,256
Other, net		146	(1,596)
Net cash used in investing activities		(967,560)	(1,341,177)
Financing Activities
Debt proceeds		2,494,077	7,052,189
Debt issuance costs		(82,115)	(62,346)
Repayments of debt		(427,978)	(921,867)
Proceeds from issuance of commercial paper notes		0	6,396,787
Repayments of commercial paper notes		(414,570)	(7,494,025)
Dividends paid		0	(163,563)
Proceeds from common stock issuances		1,617,234	0
Other, net		(2,724)	(16,963)
Net cash provided by financing activities		3,183,924	4,790,212
Effect of exchange rate changes on cash		(192)	(672)
Net increase in cash and cash equivalents		1,406,989	3,647,073
Cash and cash equivalents at beginning of period		3,684,474	243,738	$ 243,738
Cash and cash equivalents at end of period		5,091,463	3,890,811	$ 3,684,474
Cash paid during the period for:
Interest, net of amount capitalized		228,877	31,481
Non-cash Investing Activities
Notes receivable issued upon sale of property and equipment and other assets		16,000	6,294
Purchase of property and equipment included in accounts payable and accrued expenses and other liabilities		$ 26,882	$ 29,022

[1] There were no dividends received from TUI Cruises for the quarters ended March 31, 2021 and March 31, 2020