v3.20.4
Income Taxes - Components of Income Taxes (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Federal:      
Current $ 105 $ 167 $ 30
Deferred (148) 115 1,153
Total federal (43) 282 1,183
State:      
Current 18 23 63
Deferred 69 143 330
Total state 87 166 393
Total income taxes 44 448 1,576
FPL[Member]      
Federal:      
Current 53 348 251
Deferred 388 (29) 134
Total federal 441 319 385
State:      
Current 44 49 91
Deferred 125 73 63
Total state 169 122 154
Total income taxes $ 610 $ 441 $ 539