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v3.19.3.a.u2

Fair Value Measurements (Assets and Liabilities Measured on a Recurring Basis) (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Derivatives [Abstract] |  |
Derivative Assets | $ 2,386 | $ 1,919
Derivatives [Abstract] |  |
Derivative Liabilities | 1,340 | 1,191
Fair Value, Recurring [Member] |  |
Assets [Abstract] |  |
Cash equivalents and restricted cash - equity securities | 363 | 486
Special use funds [Abstract] |  |
Equity securities | 3,963 | 3,046
U.S. Government and municipal bonds | 717 | 604
Corporate debt securities | 748 | 728
Mortgage-backed securities | 517 | 478
Other debt securities | 117 | 146
Other Investments [Abstract] |  |
Equity securities | 46 | 24
Debt securities | 151 | 126
Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) [Member] | Fair Value, Recurring [Member] |  |
Assets [Abstract] |  |
Cash equivalents and restricted cash - equity securities | 363 | 486
Special use funds [Abstract] |  |
Equity securities | 1,875 | 1,445
U.S. Government and municipal bonds | 567 | 449
Corporate debt securities | 0 | 0
Mortgage-backed securities | 0 | 0
Other debt securities | 0 | 0
Other Investments [Abstract] |  |
Equity securities | 34 | 13
Debt securities | 82 | 36
Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) [Member] | Fair Value, Recurring [Member] | Current other assets [Member] |  |
Assets [Abstract] |  |
Restricted cash | 60 | 85
Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) [Member] | Fair Value, Recurring [Member] | Other Noncurrent Assets [Member] |  |
Assets [Abstract] |  |
Restricted cash | 64 |
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] |  |
Assets [Abstract] |  |
Cash equivalents and restricted cash - equity securities | 0 | 0
Special use funds [Abstract] |  |
Equity securities | 2,088 | 1,601
U.S. Government and municipal bonds | 150 | 155
Corporate debt securities | 748 | 728
Mortgage-backed securities | 517 | 478
Other debt securities | 117 | 145
Other Investments [Abstract] |  |
Equity securities | 12 | 11
Debt securities | 69 | 90
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Recurring [Member] |  |
Assets [Abstract] |  |
Cash equivalents and restricted cash - equity securities | 0 | 0
Special use funds [Abstract] |  |
Equity securities | 0 | 0
U.S. Government and municipal bonds | 0 | 0
Corporate debt securities | 0 | 0
Mortgage-backed securities | 0 | 0
Other debt securities | 0 | 1
Other Investments [Abstract] |  |
Equity securities | 0 | 0
Debt securities | 0 | 0
Commodity contracts [Member] | Fair Value, Recurring [Member] |  |
Derivatives [Abstract] |  |
Asset offsetting | 2,700 | 2,811
Derivative Assets | 2,350 | 1,840
Derivatives [Abstract] |  |
Liability offsetting | 2,625 | 2,622
Derivative Liabilities | 576 | 683
Commodity contracts [Member] | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) [Member] | Fair Value, Recurring [Member] |  |
Other Investments [Abstract] |  |
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement | 1,229 | 1,379
Derivatives [Abstract] |  |
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement | 1,365 | 1,329
Commodity contracts [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] |  |
Other Investments [Abstract] |  |
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement | 2,082 | 1,923
Derivatives [Abstract] |  |
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement | 1,446 | 1,410
Commodity contracts [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Recurring [Member] |  |
Other Investments [Abstract] |  |
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement | 1,739 | 1,349
Derivatives [Abstract] |  |
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement | 390 | 566
Interest Rate Contract [Member] | Fair Value, Recurring [Member] |  |
Derivatives [Abstract] |  |
Asset offsetting | 17 | 7
Derivative Assets | 9 | 49
Derivatives [Abstract] |  |
Liability offsetting | 17 | 7
Derivative Liabilities | 725 | 465
Interest Rate Contract [Member] | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) [Member] | Fair Value, Recurring [Member] |  |
Other Investments [Abstract] |  |
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement | 0 | 0
Derivatives [Abstract] |  |
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement | 0 | 0
Interest Rate Contract [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] |  |
Other Investments [Abstract] |  |
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement | 24 | 56
Derivatives [Abstract] |  |
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement | 598 | 336
Interest Rate Contract [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Recurring [Member] |  |
Other Investments [Abstract] |  |
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement | 2 | 0
Derivatives [Abstract] |  |
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement | 144 | 136
Currency Swap [Member] | Fair Value, Recurring [Member] |  |
Derivatives [Abstract] |  |
Asset offsetting | (1) | (13)
Derivative Assets | 27 | 30
Derivatives [Abstract] |  |
Liability offsetting | (1) | (13)
Derivative Liabilities | 39 | 43
Currency Swap [Member] | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) [Member] | Fair Value, Recurring [Member] |  |
Other Investments [Abstract] |  |
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement | 0 | 0
Derivatives [Abstract] |  |
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement | 0 | 0
Currency Swap [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] |  |
Other Investments [Abstract] |  |
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement | 26 | 17
Derivatives [Abstract] |  |
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement | 38 | 30
Currency Swap [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Recurring [Member] |  |
Other Investments [Abstract] |  |
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement | 0 | 0
Derivatives [Abstract] |  |
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement | 0 | 0
FPL[Member] |  |
Derivatives [Abstract] |  |
Derivative Assets | 3 | 0
Derivatives [Abstract] |  |
Derivative Liabilities | 13 | 41
FPL[Member] | Fair Value, Recurring [Member] |  |
Assets [Abstract] |  |
Cash equivalents and restricted cash - equity securities | 156 | 206
Special use funds [Abstract] |  |
Equity securities | 2,491 | 1,850
U.S. Government and municipal bonds | 535 | 470
Corporate debt securities | 533 | 544
Mortgage-backed securities | 395 | 367
Other debt securities | 111 | 132
FPL[Member] | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) [Member] | Fair Value, Recurring [Member] |  |
Assets [Abstract] |  |
Cash equivalents and restricted cash - equity securities | 156 | 206
Special use funds [Abstract] |  |
Equity securities | 596 | 398
U.S. Government and municipal bonds | 429 | 350
Corporate debt securities | 0 | 0
Mortgage-backed securities | 0 | 0
Other debt securities | 0 | 0
FPL[Member] | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) [Member] | Fair Value, Recurring [Member] | Current other assets [Member] |  |
Assets [Abstract] |  |
Restricted cash | 54 | 81
FPL[Member] | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) [Member] | Fair Value, Recurring [Member] | Other Noncurrent Assets [Member] |  |
Assets [Abstract] |  |
Restricted cash | 64 |
FPL[Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] |  |
Assets [Abstract] |  |
Cash equivalents and restricted cash - equity securities | 0 | 0
Special use funds [Abstract] |  |
Equity securities | 1,895 | 1,452
U.S. Government and municipal bonds | 106 | 120
Corporate debt securities | 533 | 544
Mortgage-backed securities | 395 | 367
Other debt securities | 111 | 131
FPL[Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Recurring [Member] |  |
Assets [Abstract] |  |
Cash equivalents and restricted cash - equity securities | 0 | 0
Special use funds [Abstract] |  |
Equity securities | 0 | 0
U.S. Government and municipal bonds | 0 | 0
Corporate debt securities | 0 | 0
Mortgage-backed securities | 0 | 0
Other debt securities | 0 | 1
FPL[Member] | Commodity contracts [Member] | Fair Value, Recurring [Member] |  |
Derivatives [Abstract] |  |
Asset offsetting | 1 | 2
Derivative Assets | 3 | 0
Derivatives [Abstract] |  |
Liability offsetting | 1 | 2
Derivative Liabilities | 13 | 41
FPL[Member] | Commodity contracts [Member] | Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) [Member] | Fair Value, Recurring [Member] |  |
Other Investments [Abstract] |  |
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement | 0 | 0
Derivatives [Abstract] |  |
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement | 0 | 0
FPL[Member] | Commodity contracts [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] |  |
Other Investments [Abstract] |  |
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement | 3 | 2
Derivatives [Abstract] |  |
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement | 5 | 7
FPL[Member] | Commodity contracts [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Recurring [Member] |  |
Other Investments [Abstract] |  |
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement | 1 | 0
Derivatives [Abstract] |  |
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement | $ 9 | $ 36

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