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	$ 885				206		206
Other comprehensive income (loss)	(182)	$ 0	$ 0	$ (182)
Stockholders' Equity Attributable to Parent at Jun. 30, 2018					6,866	1,679	5,187
Stockholders' Equity, Other	(4)	(5)	0	0
Stockholders' Equity Attributable to Parent at Mar. 31, 2018					6,763	1,679	5,084
Net Income (Loss) Attributable to Parent	372				103		103
Other comprehensive income (loss)	(250)	0	0	(250)
Stockholders' Equity Attributable to Parent at Jun. 30, 2018					6,866	1,679	5,187
Stockholders' Equity, Other	(4)	(5)	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	1,306				343		343
Other comprehensive income (loss)	57	0	0	57
Stockholders' Equity Attributable to Parent at Jun. 30, 2019	30,661				7,672	1,679	5,993
Stockholders' Equity, Other	(3)	0	(2)	0
Stockholders' Equity Attributable to Parent at Mar. 31, 2019					7,519	1,679	5,840
Net Income (Loss) Attributable to Parent	684				153		153
Other comprehensive income (loss)	(58)	0	0	(58)
Stockholders' Equity Attributable to Parent at Jun. 30, 2019	30,661				$ 7,672	$ 1,679	$ 5,993
Stockholders' Equity, Other	$ (2)	$ 0	$ (1)	$ 0