Changes in Accumulated Other Comprehensive Income (Loss) (Changes by Component) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	$ 11,105,461	$ 10,702,303	$ 9,121,412
Other comprehensive (loss) income before reclassifications	(165,553)	(306,089)	392,417
Amounts reclassified from accumulated other comprehensive loss	(4,426)	12,620	189,802
Net current-period other comprehensive (loss) income	(169,979)	(293,469)	582,219
Balance	12,163,846	11,105,461	10,702,303
Changes related to cash flow derivative hedges
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	(537,216)	(250,355)	(820,850)
Other comprehensive (loss) income before reclassifications	(146,108)	(297,994)	381,865
Amounts reclassified from accumulated other comprehensive loss	(5,205)	11,133	188,630
Net current-period other comprehensive (loss) income	(151,313)	(286,861)	570,495
Balance	(688,529)	(537,216)	(250,355)
Changes in defined benefit plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	(26,023)	(33,666)	(28,083)
Other comprehensive (loss) income before reclassifications	(20,314)	6,156	(6,755)
Amounts reclassified from accumulated other comprehensive loss	779	1,487	1,172
Net current-period other comprehensive (loss) income	(19,535)	7,643	(5,583)
Balance	(45,558)	(26,023)	(33,666)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	(64,495)	(50,244)	(67,551)
Other comprehensive (loss) income before reclassifications	869	(14,251)	17,307
Amounts reclassified from accumulated other comprehensive loss	0	0	0
Net current-period other comprehensive (loss) income	869	(14,251)	17,307
Balance	(63,626)	(64,495)	(50,244)
Accumulated other comprehensive (loss) income
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	(627,734)	(334,265)	(916,484)
Balance	$ (797,713)	$ (627,734)	$ (334,265)

Accumulated Other Comprehensive Income (Loss) [Roll Forward]

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Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Amount after tax of reclassification adjustments of other comprehensive income (loss) attributable to parent.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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