Statements of Comprehensive Income - MEC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net Income (Loss) Attributable to Parent	$ 513	$ 556
Other comprehensive income (loss), unrealized gains on available-for-sale securities	0	38
Other comprehensive income (loss), unrealized gains (losses) on cash flow hedges	(2)	(4)
Other comprehensive income (loss)	68	126
Comprehensive income attributable to BHE shareholders	581	682
MidAmerican Energy Company [Member]
Net Income (Loss) Attributable to Parent	$ 106	$ 105