v3.7.0.1

Derivative Instruments (Balance Sheet Disclosure) (Details) - USD ($) $ in Millions | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Derivative Asset | $ 1,974 | $ 2,235
Derivative Liability | 784 | 881
Current derivative assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset | 546 | 885
Derivative Asset, Collateral, Obligation to Return Cash, Offset | 125 | 96
Non Current Derivative Assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset | 1,428 | 1,350
Derivative Asset, Collateral, Obligation to Return Cash, Offset | 16 | 71
Current derivative liabilities [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liability | 277 | 404
Noncurrent derivative liabilities [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liability | 507 | 477
Not Designated as Hedging Instrument [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 4,563 | 4,879
Derivative Liability, Fair Value, Gross Liability | 3,232 | 3,358
Derivative Asset | 1,974 | 2,235
Derivative Liability | 784 | 881
Commodity Contract [Member] | Not Designated as Hedging Instrument [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 4,409 | 4,590
Derivative Liability, Fair Value, Gross Liability | 2,883 | 2,968
Derivative Asset | 1,814 | 1,938
Derivative Liability | 429 | 483
Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 154 | 288
Derivative Liability, Fair Value, Gross Liability | 306 | 284
Derivative Asset | 152 | 296
Derivative Liability | 304 | 292
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 0 | 1
Derivative Liability, Fair Value, Gross Liability | 43 | 106
Derivative Asset | 8 | 1
Derivative Liability | 51 | 106
FPL [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset | 18 | 209
Derivative Liability | 2 | 1
FPL [Member] | Current derivative assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset | 18 | 209
FPL [Member] | Current derivative liabilities [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liability | 2 | 1
FPL [Member] | Commodity Contract [Member] | Not Designated as Hedging Instrument [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 27 | 212
Derivative Liability, Fair Value, Gross Liability | 11 | 4
Derivative Asset | 18 | 209
Derivative Liability | $ 2 | $ 1

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