Changes in Accumulated Other Comprehensive Loss - Changes in AOCI by Component (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Changes in accumulated other comprehensive loss by component
Beginning balance	$ 5,085,556	$ 8,760,669
Ending balance	3,988,928	9,172,382
Changes related to cash flow derivative hedges
Changes in accumulated other comprehensive loss by component
Beginning balance	(646,473)	(650,519)
Other comprehensive income (loss) before reclassifications	224,619	(927)
Amounts reclassified from accumulated other comprehensive loss	(28,718)	11,229
Net current-period other comprehensive income (loss)	195,901	10,302
Ending balance	(450,572)	(640,217)
Changes in defined benefit plans
Changes in accumulated other comprehensive loss by component
Beginning balance	(56,835)	(65,542)
Other comprehensive income (loss) before reclassifications	11,869	9,720
Amounts reclassified from accumulated other comprehensive loss	728	743
Net current-period other comprehensive income (loss)	12,597	10,463
Ending balance	(44,238)	(55,079)
Foreign currency translation adjustments
Changes in accumulated other comprehensive loss by component
Beginning balance	(7,577)	(23,280)
Other comprehensive income (loss) before reclassifications	7,778	9,722
Amounts reclassified from accumulated other comprehensive loss	0	0
Net current-period other comprehensive income (loss)	7,778	9,722
Ending balance	201	(13,558)
Accumulated  other comprehensive loss
Changes in accumulated other comprehensive loss by component
Beginning balance	(710,885)	(739,341)
Other comprehensive income (loss) before reclassifications	244,266	18,515
Amounts reclassified from accumulated other comprehensive loss	(27,990)	11,972
Net current-period other comprehensive income (loss)	216,276	30,487
Ending balance	$ (494,609)	$ (708,854)