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Summary of Significant Accounting Policies (Details) - PSCo $ in Millions | Oct. 25, 2021 USD ($)
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New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Recovered Winter Storm Uri Deferred net natural gas, fuel, and purchased energy costs - electric utility | $ 263
Recovered Winter Storm Uri Deferred net natural gas, fuel, and purchased energy costs - natural gas utility | 287
Carrying charges through a rider mechanism | 0
Electric customers refunds | 41
Foregone recovery of replacement power costs | 14
Incremental bad debt expense | $ 11

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