Property Plant and Equipment Property Plant and Equipment (Details) - USD ($) $ in Millions		Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property, plant and equipment		$ 25,317	$ 24,101
Accumulated depreciation		5,665	5,657
Property, plant and equipment, net		19,652	18,444
Electric plant
Property, Plant and Equipment [Line Items]
Property, plant and equipment		15,771	16,543
Natural gas plant
Property, Plant and Equipment [Line Items]
Property, plant and equipment		5,949	5,471
Common and other property
Property, Plant and Equipment [Line Items]
Property, plant and equipment		1,415	1,224
Plant to be retired
Property, Plant and Equipment [Line Items]
Property, plant and equipment	[1]	1,305	182
CWIP
Property, Plant and Equipment [Line Items]
Property, plant and equipment		$ 877	$ 681

[1] Amounts as of Dec. 31, 2021 include Comanche Units 1 and 2 and Craig Units 1 and 2. Following the June 2022 approval of PSCo’s revised resource plan settlement, amounts as of Dec. 31, 2022 include the addition of Comanche Unit 3, Hayden Units 1 and 2 and coal generation assets at Pawnee pending facility gas conversion as well as the removal of Comanche Unit 1 that was retired in 2022. Amounts are presented net of accumulated depreciation.