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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

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