Statements of Changes in Shareholder's Equity - MEC - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income, Net [Member]	MidAmerican Energy Company [Member]	MidAmerican Energy Company [Member] Common Stock [Member]	MidAmerican Energy Company [Member] Additional Paid-in Capital [Member]	MidAmerican Energy Company [Member] Retained Earnings [Member]
Stockholders' Equity Attributable to Parent at Dec. 31, 2018						$ 6,446	$ 0	$ 561	$ 5,885
Net Income (Loss) Attributable to Parent	$ 622					193			193
Other comprehensive income (loss)	115	$ 0	$ 0	$ 0	$ 115
Stockholders' Equity, Other	(1)	0	0	(1)	0
Stockholders' Equity Attributable to Parent at Mar. 31, 2019						6,639	0	561	6,078
Stockholders' Equity Attributable to Parent at Dec. 31, 2019	32,449					7,240	0	561	6,679
Net Income (Loss) Attributable to Parent	670					151			151
Other comprehensive income (loss)	(547)	0	0	0	(547)
Stockholders' Equity, Other	(1)	$ 0	$ (1)	$ 0	$ 0
Stockholders' Equity Attributable to Parent at Mar. 31, 2020	$ 32,445					$ 7,391	$ 0	$ 561	$ 6,830