Other, Net - MidAmerican Funding (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	$ 97	$ (9)	$ (420)
MidAmerican Funding, LLC and Subsidiaries [Domain]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	52	31	9
MidAmerican Funding, LLC and Subsidiaries [Domain] | Defined Benefit Retirement Plans, Non-service Cost Components [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	17	21	18
MidAmerican Funding, LLC and Subsidiaries [Domain] | Corporate Owned Life Insurance Income (Loss) [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	24	6	13
MidAmerican Funding, LLC and Subsidiaries [Domain] | Gain (Loss) on Extinguishment of Debt [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	0	0	(29)
MidAmerican Funding, LLC and Subsidiaries [Domain] | Interest Income and Other Net [Member]
Component of Other Income (Expense), Nonoperating [Line Items]
Other, net	$ 11	$ 4	$ 7