Early Plant Retirements - Implications of Potential Early Plant Retirement on Balance Sheet (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Implications of Potential Early Plant Retirement [Line Items]
Materials and supplies inventory, net	$ 473	$ 476
Property, plant and equipment, net	$ 65,465	$ 64,558

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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