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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Net income $ 431,751 $ 392,018 $ 1,237,300 $ 1,120,333
Other comprehensive income (loss), net of tax        
Change in fair value of derivatives, net of tax of $(31,749), $39,299, $(16,951) and $81,134, respectively 106,289 (131,566) 56,747 (271,622)
Derivative amounts reclassified to net income, net of tax of $(16,116), $(19,845), $(56,876) and $(42,722), respectively 53,953 66,438 190,411 143,029
Change in retirement and other postretirement benefit plan obligations, net of tax of $(873), $(1,355), $(2,651) and $(4,009), respectively 2,922 4,538 8,874 13,423
Other comprehensive income of unconsolidated affiliates, net of tax of $(1,230), $(60), $(4,733) and $(1,429), respectively 4,118 197 15,846 4,783
Total other comprehensive income (loss), net of tax 167,282 (60,393) 271,878 (110,387)
Comprehensive income $ 599,033 $ 331,625 $ 1,509,178 $ 1,009,946