Consolidated Statements of Changes in 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]	MidAmerican Funding, LLC and Subsidiaries [Domain] Accumulated Other Comprehensive (Loss) Income, Net [Member]
Stockholders' Equity Attributable to Parent at Dec. 31, 2015					$ 5,525	$ 1,679	$ 3,876	$ (30)
Net Income (Loss) Attributable to Parent	$ 490				73		73
Other comprehensive income (loss)	99	$ 0	$ 0	$ 99	1			1
Stockholders' Equity Note, Spinoff Transaction					27			27
Stockholders' Equity Attributable to Parent at Mar. 31, 2016					5,625	1,679	3,948	(2)
Stockholders' Equity, Other					(1)		(1)
Stockholders' Equity Attributable to Parent at Dec. 31, 2016	24,327				6,086	1,679	4,407	0
Net Income (Loss) Attributable to Parent	556				102		102
Other comprehensive income (loss)	126	0	0	126
Stockholders' Equity Attributable to Parent at Mar. 31, 2017	24,982				$ 6,188	$ 1,679	$ 4,509	$ 0
Stockholders' Equity, Other	$ (11)	$ (8)	$ 0	$ 0