Fair Value Measurements and Derivative Instruments - Income Statement Hedging Instruments (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Effect of derivative instruments involved in hedging on the consolidated financial statements
Fuel	$ 53,815	$ 177,677	$ 327,275	$ 519,772
Depreciation and amortization	317,139	320,295	961,226	924,180
Interest Income (Expense)	(254,332)	(96,413)	(555,392)	(292,006)
Other expense	(10,853)	(7,668)	(127,537)	(34,537)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income	(16,887)	(3,253)	(62,184)	16,389
Interest Contracts \| Interest expense, net of interest capitalized
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income	(6,532)	(373)	(15,939)	(1,173)
Fuel swaps \| Fuel
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income	(5,598)	2,435	(32,520)	33,815
Fuel swaps \| Other income (expense)
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income	536	(472)	3,029	(1,916)
Foreign exchange contracts \| Depreciation and amortization expenses
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income	(3,782)	(3,592)	(10,899)	(10,471)
Foreign exchange contracts \| Other income (expense)
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income	(1,511)	(1,251)	(5,855)	(3,866)
Interest rate swaps \| Interest expense, net of interest capitalized
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income	(6,532)	(373)	(15,939)	(1,173)
Fair Value Hedging
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Recognized in Income on Hedged Item	2,379	(4,116)	(20,855)	(25,862)
Amount of Gain (Loss) Recognized in Income on Derivative	39	2,920	23,338	19,699
Fair Value Hedging \| Interest Contracts \| Interest expense, net of interest capitalized
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Recognized in Income on Hedged Item	2,379	(4,116)	(20,855)	(25,862)
Amount of Gain (Loss) Recognized in Income on Derivative	39	2,920	23,338	19,699
Fair Value Hedging \| Interest Contracts \| Other income (expense)
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Recognized in Income on Hedged Item	0	0	0	0
Amount of Gain (Loss) Recognized in Income on Derivative	0	0	0	0
Fair Value Hedging \| Interest rate swaps \| Interest expense, net of interest capitalized
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Recognized in Income on Hedged Item	2,379	(4,116)	(20,855)	(25,862)
Amount of Gain (Loss) Recognized in Income on Derivative	$ 39	$ 2,920	$ 23,338	$ 19,699

Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement.

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Fuel costs incurred that are directly related to goods produced and sold and services rendered during the reporting period.

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