Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2023

Property, Plant and Equipment [Abstract]

Property, Pland and Equipment with Useful Life Classification

The following table summarizes the components of the electric generation, distribution, 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)	2023		2022
Electric generation and distribution facilities	5-40	$	27,517	$	24,135
Other buildings	3-51	1,239		1,197
Furniture, fixtures and equipment	3-30	397		348
Other	1-39	1,037		919
Total electric generation, distribution assets and other		30,190		26,599
Accumulated depreciation		(8,602)		(8,651)
Net electric generation, distribution assets and other		$	21,588	$	17,948

Interest Capitalized During Development And Construction

The following table summarizes depreciation expense (including the amortization of assets recorded under finance leases 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,	2023		2022		2021
Depreciation expense	$	1,045	$	982	$	972
Interest capitalized during development and construction	563		224		226

Net Asset Value Of Regulated And Non-Regulated Assets And Accumulated Depreciation

The following table summarizes non-regulated and regulated electric generation, distribution, and other property, plant and equipment and accumulated depreciation as of the dates indicated (in millions):

December 31,	2023		2022
Non-regulated electric generation assets and other, gross	$	20,195	$	16,890
Non-regulated accumulated depreciation	(4,777)		(4,584)
Non-regulated electric generation assets and other, net	15,418		12,306
Regulated electric generation, distribution assets and other, gross	9,995		9,709
Regulated accumulated depreciation	(3,825)		(4,067)
Regulated electric generation, distribution assets and other, net	6,170		5,642
Net electric generation, distribution assets and other	$	21,588	$	17,948