Statements of Consolidated Comprehensive Income (Loss) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Net Income		$ 337.8	$ 431.3
Other comprehensive income:
Net unrealized loss on available-for-sale securities	[1]	2.0	(5.7)
Net unrealized gain (loss) on cash flow hedges	[2]	0.1	47.0
Unrecognized pension and OPEB benefit (costs)	[3]	0.3	0.1
Total other comprehensive income		2.4	41.4
Comprehensive Income		$ 340.2	$ 472.7

[1] Net unrealized gain (loss) on available-for-sale securities, net of $0.5 million tax expense and $1.5 million tax benefit in the first quarter of 2023 and 2022, respectively.

[2] adjustment for cash flow hedges, net of $0.1 million tax benefit and $21.3 million tax expense in the first quarter of 2023 and 2022, respectively.

[3] Unrecognized pension and OPEB benefit, net of $0.1 million and zero tax expense in the first quarter of 2023 and 2022, respectively.