Income Taxes - Components of Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Federal:
Current	$ 11	$ (26)	$ 105
Deferred	497	311	(148)
Total federal	508	285	(43)
State:
Current	41	(62)	18
Deferred	37	125	69
Total state	78	63	87
Total income taxes	586	348	44
FPL [Member]
Federal:
Current	3	85	16
Deferred	684	545	474
Total federal	687	630	490
State:
Current	2	1	32
Deferred	258	207	156
Total state	260	208	188
Total income taxes	$ 947	$ 838	$ 678