Investments and Restricted Cash and Investments (Tables)

12 Months Ended

Dec. 31, 2020

Investments, Including Equity Method And Restricted Cash And Investments [Line Items]

Investments and Restricted Cash and Investments [Table Text Block]

Investments and restricted cash and cash equivalents and investments consists of the following as of December 31 (in millions):

	2020		2019
Investments:
BYD Company Limited common stock	$	5,897	$	1,122
Rabbi trusts	440		410
Other	263		187
Total investments	6,600		1,719
Equity method investments:
BHE Renewables tax equity investments	5,626		3,130
Electric Transmission Texas, LLC	594		555
Iroquois Gas Transmission System, L.P.	580		—
JAX LNG, LLC	75		—
Bridger Coal Company	74		81
Other	118		181
Total equity method investments	7,067		3,947
Restricted cash and cash equivalents and investments:
Quad Cities Station nuclear decommissioning trust funds	676		599
Other restricted cash and cash equivalents	155		230
Total restricted cash and cash equivalents and investments	831		829
Total investments and restricted cash and cash equivalents and investments	$	14,498	$	6,495
Reflected as:
Other current assets	$	178	$	240
Noncurrent assets	14,320		6,255
Total investments and restricted cash and cash equivalents and investments	$	14,498	$	6,495

Unrealized Gain (Loss) on Investments

Gains (losses) on marketable securities, net recognized during the period consists of the following (in millions):

	Years Ended December 31,
	2020		2019
Unrealized gains (losses) recognized on marketable securities still held at the reporting date	$	4,791	$	(290)
Net gains recognized on marketable securities sold during the period	6		2
Gains (losses) on marketable securities, net	$	4,797	$	(288)

MidAmerican Energy Company [Member]

Investments, Including Equity Method And Restricted Cash And Investments [Line Items]

Investments and Restricted Cash and Investments [Table Text Block]

Investments and restricted investments consists of the following amounts as of December 31 (in millions):

	2020		2019
Nuclear decommissioning trust	$	676	$	599
Rabbi trusts	211		203
Other	24		16
Total	$	911	$	818

Eastern Energy Gas Holdings, LLC [Member]

Investments, Including Equity Method And Restricted Cash And Investments [Line Items]

Investments and Restricted Cash and Investments [Table Text Block]

Investments and restricted cash and cash equivalents consists of the following as of December 31 (in millions):

	December 31, 2020		December 31, 2019
Equity method investments:
Iroquois	$	244	$	276
White River Hub	—		36
Total investments	244		312
Restricted cash and cash equivalents:
Customer deposits	13		12
Total restricted cash and cash equivalents	13		12
Total investments and restricted cash and cash equivalents	$	257	$	324
Reflected as:
Current assets	$	13	$	12
Noncurrent assets	244		312
Total investments and restricted cash and cash equivalents	$	257	$	324