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VARIABLE INTEREST ENTITIES - NARRATIVE (Details) - Sabal Trail Transmission L L C - USD ($) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2018 | Apr. 30, 2018
Variable Interest Entity, Not Primary Beneficiary |  |
Ownership interest in VIE (as a percent) | 50.00% |
Spectra Energy Partners, LP |  |
Variable Interest Entity, Not Primary Beneficiary |  |
Proceeds from issuance of debt | $ 744,000,000 |
4.246% Senior Notes Due In 2028 | Spectra Energy Partners, LP |  |
Variable Interest Entity, Not Primary Beneficiary |  |
Face amount of notes issued |  | $ 500,000,000
Interest rate (as a percent) |  | 4.246%
4.682% Senior Notes Due in 2038 | Spectra Energy Partners, LP |  |
Variable Interest Entity, Not Primary Beneficiary |  |
Face amount of notes issued |  | $ 600,000,000
Interest rate (as a percent) |  | 4.682%
4.832% Senior Notes Due In 2048 | Spectra Energy Partners, LP |  |
Variable Interest Entity, Not Primary Beneficiary |  |
Face amount of notes issued |  | $ 400,000,000
Interest rate (as a percent) |  | 4.832%

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