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v3.22.1

Balance Sheet Components (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 USD ($) | Mar. 31, 2021 USD ($) | Dec. 31, 2021 USD ($)
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Accounts Receivable, Allowance for Credit Loss | $ 28 |  | $ 26
Unbilled Receivables, Current | 90 |  | 117
Finite-Lived Intangible Assets, Accumulated Amortization | 457 |  | 446
Amortization of Intangible Assets |  | $ 15 |
Line of Credit Facility, Maximum Borrowing Capacity | $ 750 |  |
Debt Instrument, Covenant Description | 65.00% |  |
Ratio of Indebtedness to Net Capital | 0.560 |  |
Line of Credit Facility, Remaining Borrowing Capacity | $ 650 |  |
Line of Credit Facility, Current Borrowing Capacity | 220 | 650 |
Authorized Short-Term Debt | 900 |  |
Purchased power and fuel | 202 | 169 |
Repayments of Long-term Debt | 0 | 140 |
Operating Lease, Right-of-Use Asset | 29 |  |
Increase (Decrease) in Accounts Payable and Other Operating Liabilities | 28 |  |
Amount above baseline net variable power costs | (10) |  | 62
Lower deadband limit below baseline net variable power costs | 15 |  |
Upper deadband limit above baseline net variable power costs | 30 |  |
Proceeds from failed sale-leaseback transactions | 25 | $ 0 |
Letters of Credit Outstanding, Amount | 75 |  |
Sale Leaseback Transaction, Net Book Value |  |  | 37
Gain (Loss) on Disposition of Intangible Assets | 11 |  |
Gain (Loss) on Disposition of Property Plant Equipment | 1 |  |
Asset Impairment Charges | 17 |  |
Increase (Decrease) in Deferred Charges | 15 |  |
Tangible Asset Impairment Charges | 2 |  |
Finance Lease, Liability | 25 |  |
221119 Other Electric Power Generation |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Increase (Decrease) in Accounts Payable and Other Operating Liabilities | 28 |  | 29
Fire |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Increase (Decrease) in Accounts Payable and Other Operating Liabilities | 38 |  | 45
pandemic |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Increase (Decrease) in Accounts Payable and Other Operating Liabilities | 35 |  | $ 36
Letter of Credit [Member] |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Commercial paper | $ 0 |  |

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