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CONDENSED CONSOLIDATING FINANCIAL INFORMATION - Schedule of Long Term Debt Instruments (Details) $ in Millions, $ in Billions | Dec. 31, 2019 USD ($) | Dec. 31, 2019 CAD ($)
--- | --- | ---
Condensed Financial Statements, Captions [Line Items] |  |
Long-term debt |  | $ 63,585
Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Long-term debt | $ 7.9 | $ 7,600
2.900% Senior Notes due 2022 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 290.00% | 290.00%
4.000% Senior Notes due 2023 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 400.00% | 400.00%
2.500% Senior Notes due 2025 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 350.00% | 350.00%
2.500% Senior Notes due 2025 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 250.00% | 250.00%
4.250% Senior Notes due 2026 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 425.00% | 425.00%
3.700% Senior Notes due 2027 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 370.00% | 370.00%
3.125% Senior Notes due 2029 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 312.50% | 312.50%
4.500% Senior Notes due 2044 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 450.00% | 450.00%
5.500% Senior Notes due 2046 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 550.00% | 550.00%
4.000% Senior Notes due 2049 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 400.00% | 400.00%
4.530% Senior Notes due 2020 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 453.00% | 453.00%
4.850% Senior Notes due 2020 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 485.00% | 485.00%
4.260% Senior Notes due 2021 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 426.00% | 426.00%
3.160% Senior Notes due 2021 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 316.00% | 316.00%
4.850% Senior Notes due 2022 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 485.00% | 485.00%
3.190% Senior Notes due 2022 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 319.00% | 319.00%
3.940% Senior Notes due 2023 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 394.00% | 394.00%
3.940% Senior Notes due 2023 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 394.00% | 394.00%
3.950% Senior Notes due 2024 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 395.00% | 395.00%
3.200% Senior Notes due 2027 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 320.00% | 320.00%
6.100% Senior Notes due 2028 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 610.00% | 610.00%
2.990% Senior Notes due 2029 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 299.00% | 299.00%
7.220% Senior Notes due 2030 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 722.00% | 722.00%
7.200% Senior Notes due 2032 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 720.00% | 720.00%
5.570% Senior Notes due 2035 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 557.00% | 557.00%
5.120% Senior Notes due 2040 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 575.00% | 575.00%
5.120% Senior Notes due 2040 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 512.00% | 512.00%
4.240% Senior Notes due 2042 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 424.00% | 424.00%
4.570% Senior Notes due 2044 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 457.00% | 457.00%
4.870% Senior Notes due 2044 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 487.00% | 487.00%
4.560% Senior Notes due 2064 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 456.00% | 456.00%
Spectra Energy Partners, LP | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Long-term debt | $ 3.9 |
Spectra Energy Partners, LP | 4.600% Senior Notes due 2021 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 4.60% | 4.60%
Spectra Energy Partners, LP | 4.750% Senior Notes due 2024 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 4.75% | 4.75%
Spectra Energy Partners, LP | 3.500% Senior Notes due 2025 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 3.50% | 3.50%
Spectra Energy Partners, LP | 3.375% Senior Notes due 2026 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 3.375% | 3.375%
Spectra Energy Partners, LP | 5.950% Senior Notes due 2043 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 5.95% | 5.95%
Spectra Energy Partners, LP | 4.500% Senior Notes due 2045 | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 4.50% | 4.50%
Enbridge Energy Partners, L.P. | Senior notes |  |
Condensed Financial Statements, Captions [Line Items] |  |
Long-term debt | $ 3.0 |
Enbridge Energy Partners, L.P. | 4.200% Notes due 2021 |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 4.20% | 4.20%
Enbridge Energy Partners, L.P. | 5.875% Notes due 2025 |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 5.875% | 5.875%
Enbridge Energy Partners, L.P. | 5.950% Notes due 2033 |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 5.95% | 5.95%
Enbridge Energy Partners, L.P. | 6.300% Notes due 2034 |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 6.30% | 6.30%
Enbridge Energy Partners, L.P. | 7.500% Notes due 2038 |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 7.50% | 7.50%
Enbridge Energy Partners, L.P. | 5.500% Notes due 2040 |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 5.50% | 5.50%
Enbridge Energy Partners, L.P. | 7.375% Notes due 2045 |  |
Condensed Financial Statements, Captions [Line Items] |  |
Interest rate (percent) | 7.375% | 7.375%

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