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Selected Balance Sheet Data, Property, Plant and Equipment, Net (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Public Utility, Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment, gross |  | $ 71,165 | $ 69,692
Less accumulated depreciation and amortization |  | (18,771) | (18,399)
Property, plant and equipment, net |  | 52,765 | 51,642
Electric plant |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment, gross |  | 52,982 | 52,494
Natural gas plant |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment, gross |  | 9,198 | 9,080
Common and other property |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment, gross |  | 3,216 | 3,190
Plant to be retired |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment, gross | [1] | 1,996 | 2,055
Construction work in progress |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment, gross |  | 3,773 | 2,873
Nuclear fuel |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment, gross |  | 3,379 | 3,337
Less accumulated depreciation and amortization |  | $ (3,008) | $ (2,988)
[1] | Amounts include Sherco 1 and 3 and A.S. King for NSP-Minnesota; Comanche Units 2 and 3, Craig Units 1 and 2, Hayden Units 1 and 2 and coal generation assets at Pawnee pending facility gas conversion for PSCo; and Tolk Unit 1 and 2 and coal generation assets at Harrington pending facility gas conversion for SPS. Amounts are presented net of accumulated depreciation.

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