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Summary of Significant Accounting and Reporting Policies (Regulatory Assets and Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Current: |  |
Early retirement of generation facilities | $ 36 | $ 31
Acquisition of purchased power agreements | 161 | 165
Other | 180 | 139
Total | 377 | 335
Noncurrent: |  |
Early retirement of generation facilities | 1,438 | 1,004
Acquisition of purchased power agreements | 473 | 634
Other | 1,801 | 1,649
Total | 3,712 | 3,287
Current: |  |
Deferred clause revenues | 215 | 309
Other | 30 | 11
Total | 245 | 320
Noncurrent: |  |
Asset retirement obligation regulatory expense difference | 3,583 | 2,826
Accrued asset removal costs | 1,206 | 1,346
Deferred taxes | 4,698 | 4,862
Other | 1,248 | 902
Total | 10,735 | 9,936
FPL[Member] |  |
Current: |  |
Early retirement of generation facilities | 32 | 27
Acquisition of purchased power agreements | 161 | 165
Other | 42 | 35
Total | 235 | 227
Noncurrent: |  |
Early retirement of generation facilities | 932 | 956
Acquisition of purchased power agreements | 473 | 634
Other | 991 | 959
Total | 2,396 | 2,549
Current: |  |
Deferred clause revenues | 197 | 284
Other | 9 | 0
Total | 206 | 284
Noncurrent: |  |
Asset retirement obligation regulatory expense difference | 3,583 | 2,828
Accrued asset removal costs | 1,015 | 1,157
Deferred taxes | 4,237 | 4,397
Other | 1,217 | 914
Total | $ 10,052 | $ 9,296

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