Consolidated Statements of Changes in Member's Equity - MidAmerican Funding - USD ($) $ in Millions	Total	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income, Net [Member]	MidAmerican Funding, LLC and Subsidiaries [Member]	MidAmerican Funding, LLC and Subsidiaries [Member] Additional Paid-in Capital [Member]	MidAmerican Funding, LLC and Subsidiaries [Member] Retained Earnings [Member]
Balance at Dec. 31, 2019				$ (1,706)	$ 8,101	$ 1,679	$ 6,422
Net Income (Loss) Attributable to Parent	$ 670				150		150
Other comprehensive income (loss)	(547)	$ 0	$ 0	(547)
Stockholders' Equity, Other	(1)	(1)	0	0
Balance at Mar. 31, 2020				(2,253)	8,251	1,679	6,572
Balance at Dec. 31, 2020	43,010			(1,552)	8,919	1,679	7,240
Net Income (Loss) Attributable to Parent	4				144		144
Other comprehensive income (loss)	112	0	0	112
Stockholders' Equity, Other	3	$ 0	$ 1	0
Balance at Mar. 31, 2021	$ 43,089			$ (1,440)	$ 9,063	$ 1,679	$ 7,384