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v3.21.1

Changes in Accumulated Other Comprehensive Loss - Changes in AOCI by Component (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Changes in accumulated other comprehensive loss by component |  |
Beginning balance | $ 8,760,669 | $ 12,163,846
Ending balance | 9,172,382 | 10,231,775
Changes related to cash flow derivative hedges |  |
Changes in accumulated other comprehensive loss by component |  |
Beginning balance | (650,519) | (688,529)
Other comprehensive income (loss) before reclassifications | (927) | (322,985)
Amounts reclassified from accumulated other comprehensive loss | 11,229 | 22,380
Net current-period other comprehensive income (loss) | 10,302 | (300,605)
Ending balance | (640,217) | (989,134)
Changes in defined benefit plans |  |
Changes in accumulated other comprehensive loss by component |  |
Beginning balance | (65,542) | (45,558)
Other comprehensive income (loss) before reclassifications | 9,720 | (8,094)
Amounts reclassified from accumulated other comprehensive loss | 743 | 505
Net current-period other comprehensive income (loss) | 10,463 | (7,589)
Ending balance | (55,079) | (53,147)
Foreign currency translation adjustments |  |
Changes in accumulated other comprehensive loss by component |  |
Beginning balance | (23,280) | (63,626)
Other comprehensive income (loss) before reclassifications | 9,722 | 10,290
Amounts reclassified from accumulated other comprehensive loss | 0 | 0
Net current-period other comprehensive income (loss) | 9,722 | 10,290
Ending balance | (13,558) | (53,336)
Accumulated other comprehensive loss |  |
Changes in accumulated other comprehensive loss by component |  |
Beginning balance | (739,341) | (797,713)
Other comprehensive income (loss) before reclassifications | 18,515 | (320,789)
Amounts reclassified from accumulated other comprehensive loss | 11,972 | 22,885
Net current-period other comprehensive income (loss) | 30,487 | (297,904)
Ending balance | $ (708,854) | $ (1,095,617)

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