Long-term Debt - MidAmerican Funding LLC (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Par value	$ 49,746
BHE restricted net assets	18,300
MidAmerican Funding, LLC
Debt Instrument [Line Items]
BHE restricted net assets	5,600
MidAmerican Funding LLC \| 6.927% Senior Bonds, due 2029 \| MidAmerican Funding LLC
Debt Instrument [Line Items]
Par value	$ 239
Stated rate	6.927%
Subsidiary debt	$ 240	$ 240

Face (par) amount of debt instrument at time of issuance.

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