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Litigation and Environmental - Federal Energy Regulatory Commission Proceedings (Details) - Pending Litigation $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2020 USD ($) claims | Jun. 01, 2018 projects
Hiland Partners Holdings, LLC [Member] |  |
SFPP [Abstract] |  |
Loss Contingency, Damages Sought, Value | $ 225 |
EPNG [Abstract] |  |
Infrastructures to Build for Settlement | projects |  | 10
Federal Energy Regulatory Commission [Member] | Unfavorable Regulatory Action | EPNG |  |
EPNG [Abstract] |  |
Loss Contingency, Pending Claims, Number | claims | 2 |
Federal Energy Regulatory Commission [Member] | Annual Rate Reductions | Unfavorable Regulatory Action | SFPP |  |
SFPP [Abstract] |  |
Loss Contingency, Damages Sought, Value | $ 50 |
Federal Energy Regulatory Commission [Member] | Revenue Subject to Refund | Unfavorable Regulatory Action | SFPP |  |
SFPP [Abstract] |  |
Loss Contingency, Damages Sought, Value | $ 425 |

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