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 [Domain]	MidAmerican Funding, LLC and Subsidiaries [Domain] Additional Paid-in Capital [Member]	MidAmerican Funding, LLC and Subsidiaries [Domain] Retained Earnings [Member]
Stockholders' Equity Attributable to Parent at Dec. 31, 2018					$ 7,329	$ 1,679	$ 5,650
Net Income (Loss) Attributable to Parent	$ 2,443				622		622
Other comprehensive income (loss)	(134)	$ 0	$ 0	$ (134)
Stockholders' Equity, Other	3	0	(1)	0
Stockholders' Equity Attributable to Parent at Sep. 30, 2019					7,951	1,679	6,272
Stockholders' Equity Attributable to Parent at Jun. 30, 2019					7,672	1,679	5,993
Net Income (Loss) Attributable to Parent	1,137				279		279
Other comprehensive income (loss)	(191)	0	0	(191)
Stockholders' Equity, Other	6	0	1	0
Stockholders' Equity Attributable to Parent at Sep. 30, 2019					7,951	1,679	6,272
Stockholders' Equity Attributable to Parent at Dec. 31, 2019	32,449				8,101	1,679	6,422
Net Income (Loss) Attributable to Parent	4,628				695		695
Other comprehensive income (loss)	(177)	0	0	(177)
Stockholders' Equity, Other	0	(1)	0	0
Stockholders' Equity Attributable to Parent at Sep. 30, 2020	36,768				8,796	1,679	7,117
Stockholders' Equity Attributable to Parent at Jun. 30, 2020					8,459	1,679	6,780
Net Income (Loss) Attributable to Parent	2,842				337		337
Other comprehensive income (loss)	242	0	0	242
Stockholders' Equity, Other	1	$ 0	$ 0	$ 0
Stockholders' Equity Attributable to Parent at Sep. 30, 2020	$ 36,768				$ 8,796	$ 1,679	$ 7,117