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, 2014					$ 5,073	$ 1,679	$ 3,417	$ (23)
Net Income (Loss) Attributable to Parent	$ 469				99		99
Other comprehensive income (loss)	(235)	$ 0	$ 0	$ (235)	2			2
Stockholders' Equity Attributable to Parent at Mar. 31, 2015					5,175	1,679	3,517	(21)
Stockholders' Equity, Other					1		1
Stockholders' Equity Attributable to Parent at Dec. 31, 2015	22,401				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	$ 22,990				5,625	$ 1,679	3,948	$ (2)
Stockholders' Equity, Other					$ (1)		$ (1)