Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment
Total property, plant, and equipment	$ 3,170	$ 2,996
Accumulated depreciation	(1,478)	(1,308)
Net property, plant, and equipment	1,692	1,688
Depreciation	291	384	$ 295
Facilities and equipment
Property, Plant and Equipment
Total property, plant, and equipment	$ 1,727	1,742
Facilities and equipment | Minimum
Property, Plant and Equipment
Depreciable lives (in years)	1 year
Facilities and equipment | Maximum
Property, Plant and Equipment
Depreciable lives (in years)	40 years
Land and improvements
Property, Plant and Equipment
Total property, plant, and equipment	$ 263	271
Nuclear fuel
Property, Plant and Equipment
Total property, plant, and equipment	$ 271	222
Depreciable lives (in years)	5 years
Hardware and office equipment and furnishings
Property, Plant and Equipment
Total property, plant, and equipment	$ 712	637
Hardware and office equipment and furnishings | Minimum
Property, Plant and Equipment
Depreciable lives (in years)	2 years
Hardware and office equipment and furnishings | Maximum
Property, Plant and Equipment
Depreciable lives (in years)	10 years
Construction in progress
Property, Plant and Equipment
Total property, plant, and equipment	$ 197	$ 124