Consolidated Statements of Changes in Member's Equity (Unaudited) - MidAmerican Funding LLC - USD ($) $ in Millions	Total	Additional Paid-in Capital	Retained Earnings	MidAmerican Funding, LLC	MidAmerican Funding, LLC Additional Paid-in Capital	MidAmerican Funding, LLC Retained Earnings
Balance at Dec. 31, 2019				$ 8,101	$ 1,679	$ 6,422
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 1,786			358		358
Other equity transactions	(1)	$ (1)
Balance at Jun. 30, 2020				8,459	1,679	6,780
Balance at Mar. 31, 2020				8,251	1,679	6,572
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,116			208		208
Balance at Jun. 30, 2020				8,459	1,679	6,780
Balance at Dec. 31, 2020	43,010			8,919	1,679	7,240
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	2,285			355		355
Other equity transactions	(1)			(1)		(1)
Balance at Jun. 30, 2021	45,412			9,273	1,679	7,594
Balance at Mar. 31, 2021				9,063	1,679	7,384
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	2,281			211		211
Other equity transactions	(4)		$ (1)	(1)		(1)
Balance at Jun. 30, 2021	$ 45,412			$ 9,273	$ 1,679	$ 7,594