Commitments and Contingencies, Legal Contingencies (Details) |
1 Months Ended | |
|---|---|---|
Dec. 31, 2015 |
Jun. 30, 2019
USD ($)
|
|
| Gas Trading Litigation | ||
| Legal Contingencies [Abstract] | ||
| Loss Contingency, Pending Claims, Number | 2 | |
| PSCo | Minimum | Line Extension Disputes | ||
| Legal Contingencies [Abstract] | ||
| Loss Contingency, Number of Plaintiffs | 50 | |
| Loss Contingency Accrual | $ 0 |