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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Net income $ 414,378 $ 342,139 $ 805,549 $ 728,315
Other comprehensive income (loss), net of tax        
Change in fair value of derivatives, net of tax of $(6,639), $51,692, $14,798 and $41,835, respectively 22,226 (173,054) (49,542) (140,056)
Derivative amounts reclassified to net income, net of tax of $(21,036), $(10,516), $(40,760) and $(22,877), respectively 70,426 35,204 136,458 76,591
Change in retirement and other postretirement benefit plan obligations, net of tax of $(873), $(1,567), $(1,778) and $(2,654), respectively 2,922 5,247 5,952 8,885
Other comprehensive income (loss) of unconsolidated affiliates, net of tax of $(1,596), $970, $(3,503) and $(1,369), respectively 5,343 (3,244) 11,728 4,586
Total other comprehensive income (loss), net of tax 100,917 (135,847) 104,596 (49,994)
Comprehensive income $ 515,295 $ 206,292 $ 910,145 $ 678,321