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Statements of Consolidated Comprehensive Income (Loss) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Net Income $ 55.8 $ 56.9 $ 487.1 $ 353.4
Other comprehensive income:        
Net unrealized loss on available-for-sale securities [1] (3.9) 0.9 (9.6) (1.6)
Net unrealized gain (loss) on cash flow hedges [2] 56.0 (49.8) 103.0 34.8
Unrecognized pension and OPEB benefit (costs) [3] (2.5) 0.8 (2.4) (0.1)
Total other comprehensive income (loss) 49.6 (48.1) 91.0 33.1
Comprehensive Income $ 105.4 $ 8.8 $ 578.1 $ 386.5
[1] Net unrealized gain (loss) on available-for-sale debt securities, net of $1.1 million tax benefit and $0.3 million tax expense in the second quarter of 2022 and 2021, respectively and $2.6 million and $0.4 million tax benefit for the six months ended 2022 and 2021, respectively.
[2] Net unrealized gain (loss) on cash flow hedges, net of $12.8 million tax expense and $16.5 million tax benefit in the second quarter of 2022 and 2021, respectively, and $34.1 million and $11.5 million tax expense for the six months ended 2022 and 2021, respectively.
[3] Unrecognized pension and OPEB benefit (costs), net of $0.8 million tax benefit and $0.2 million tax expense in the second quarter of 2022 and 2021, respectively, and $0.8 million tax benefit and $1.1 million tax expense for the six months ended 2022 and 2021, respectively.