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, 2017					$ 6,660	$ 1,679	$ 4,981
Net Income (Loss) Attributable to Parent	$ 2,286				685		685
Other comprehensive income (loss)	(184)	$ 0	$ 0	$ (184)
Stockholders' Equity Attributable to Parent at Sep. 30, 2018					7,345	1,679	5,666
Stockholders' Equity, Other	(5)	(5)	0	0
Stockholders' Equity Attributable to Parent at Jun. 30, 2018					6,866	1,679	5,187
Net Income (Loss) Attributable to Parent	1,401				479		479
Other comprehensive income (loss)	(2)	0	0	(2)
Stockholders' Equity Attributable to Parent at Sep. 30, 2018					7,345	1,679	5,666
Stockholders' Equity, Other	(1)	0	0	0
Stockholders' Equity Attributable to Parent at Dec. 31, 2018	29,593				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 Attributable to Parent at Sep. 30, 2019	31,608				7,951	1,679	6,272
Stockholders' Equity, Other	3	0	(1)	0
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 Attributable to Parent at Sep. 30, 2019	31,608				$ 7,951	$ 1,679	$ 6,272
Stockholders' Equity, Other	$ 6	$ 0	$ 1	$ 0