Consolidated Statements of Comprehensive Income - MidAmerican Funding - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net Income (Loss) Attributable to Parent	$ 1,068	$ 1,036	$ 2,198	$ 2,062
Other comprehensive income (loss), unrealized gains on available-for-sale securities	423	80	542	151
Other comprehensive income (loss), unrealized gains (losses) on cash flow hedges	1	(3)	(5)	(2)
Other comprehensive income (loss)	666	(39)	1,088	(110)
Comprehensive income attributable to BHE shareholders	1,734	997	3,286	1,952
MidAmerican Funding, LLC and Subsidiaries [Domain]
Net Income (Loss) Attributable to Parent	$ 383	$ 318	$ 616	518
Other comprehensive income (loss)				$ 2