Schedule I Condensed Statements of Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating costs and expenses:
Depreciation and amortization	$ 3,011	$ 2,984	$ 2,646
Total operating costs and expenses	15,694	15,715	14,092
Operating loss	4,150	4,072	4,522
Other income (expense):
Interest expense	(1,912)	(1,838)	(1,841)
Other, net	97	(9)	(420)
Total other income (expense)	(1,736)	(2,107)	(2,015)
Loss before income tax benefit and equity income	2,414	1,965	2,507
Income tax (benefit) expense	(598)	(583)	(554)
Equity income (loss)	(44)	43	(151)
Net income	2,968	2,591	2,910
Net income attributable to noncontrolling interests	18	23	40
Net income (loss) attributable to parent	2,950	2,568	2,870
Parent Company [Member]
Operating costs and expenses:
General and administration	49	21	55
Depreciation and amortization	5	4	4
Total operating costs and expenses	54	25	59
Operating loss	(54)	(25)	(59)
Other income (expense):
Interest expense	(452)	(438)	(475)
Other, net	(271)	(537)	(369)
Total other income (expense)	(723)	(975)	(844)
Loss before income tax benefit and equity income	(777)	(1,000)	(903)
Income tax (benefit) expense	(312)	(513)	(335)
Equity income (loss)	3,419	3,058	3,441
Net income	2,954	2,571	2,873
Net income attributable to noncontrolling interests	3	3	3
Net income (loss) attributable to parent	2,951	2,568	2,870
MidAmerican Funding LLC [Member]
Other income (expense):
Other, net	0	0	(30)
Interest Expense, Long-term Debt	(16)	(16)	(22)
Loss before income tax benefit and equity income	(16)	(16)	(52)
Income tax (benefit) expense	(5)	(5)	(22)
Equity income (loss)	792	680	604
Net income (loss) attributable to parent	$ 781	$ 669	$ 574