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Property, Plant and Equipment (Tables) | 12 Months Ended
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Dec. 31, 2021
Property, Plant and Equipment [Abstract] |
Property, Pland and Equipment with Useful Life Classification | The following table summarizes the components of the electric generation and distribution assets and other property, plant and equipment (in millions) with their estimated useful lives (in years). The amounts are stated net of all prior asset impairment losses recognized.
| Estimated Useful Life |  | December 31,
| (in years) | 2021 |  | 2020
Electric generation and distribution facilities | 5-39 |  | $ | 22,909 |  |  | $ | 24,239 |
Other buildings | 5-51 |  | 1,552 |  |  | 1,507 |
Furniture, fixtures and equipment | 3-30 |  | 356 |  |  | 333 |
Other | 1-39 |  | 735 |  |  | 628 |
Total electric generation and distribution assets and other |  |  | 25,552 |  |  | 26,707 |
Accumulated depreciation |  |  | (8,486) |  |  | (8,472) |
Net electric generation and distribution assets and other |  |  | $ | 17,066 |  |  | $ | 18,235 |
Interest Capitalized During Development And Construction | The following table summarizes depreciation expense (including the amortization of assets recorded under finance leases in 2021, 2020 and 2019, and the amortization of asset retirement obligations) and interest capitalized during development and construction on qualifying assets for the periods indicated (in millions):
Years Ended December 31, |  | 2021 |  | 2020 |  | 2019
Depreciation expense |  | $ | 972 |  |  | $ | 1,004 |  |  | $ | 977 |
Interest capitalized during development and construction |  | 226 |  |  | 307 |  |  | 238 |
Net Asset Value Of Regulated And Non-Regulated Assets And Accumulated Depreciation | The following table summarizes regulated and non-regulated generation and distribution property, plant and equipment and accumulated depreciation as of the dates indicated (in millions):
December 31, |  | 2021 |  | 2020
Regulated generation and distribution assets and other, gross |  | $ | 9,151 |  |  | $ | 8,858 |
Regulated accumulated depreciation |  | (3,655) |  |  | (3,329) |
Regulated generation and distribution assets and other, net |  | 5,496 |  |  | 5,529 |
Non-regulated generation and distribution assets and other, gross |  | 16,401 |  |  | 17,849 |
Non-regulated accumulated depreciation |  | (4,831) |  |  | (5,143) |
Non-regulated generation and distribution assets and other, net |  | 11,570 |  |  | 12,706 |
Net electric generation and distribution assets and other |  | $ | 17,066 |  |  | $ | 18,235 |

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- Definition Interest capitalized during development and construction of qualifying assets + References No definition available. + Details
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- Definition Summary of regulated and non-regulated generation and distribution facilities property, plant and equipment and associated accumulated depreciation + References No definition available. + Details
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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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