Income Taxes - Components of Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020		Dec. 31, 2019
Federal:
Current	$ (26)	$ 105		$ 167
Deferred	311	(148)		115
Total federal	285	(43)		282
State:
Current	(62)	18		23
Deferred	125	69		143
Total state	63	87		166
Total income taxes	348	44		448
FPL [Member]
Federal:
Current	85	16		390
Deferred	545	474		(41)
Total federal	630	490		349
State:
Current	1	32		50
Deferred	207	156		85
Total state	208	188		135
Total income taxes	$ 838	$ 678	[1]	$ 484	[1]

[1] Amounts have been retrospectively adjusted to reflect the merger of FPL and Gulf Power Company, see Note 6 – Merger of FPL and Gulf Power Company.