Short-term Debt and Credit Facilities - MidAmerican Funding (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Line of Credit Facility [Line Items]
Credit facilities	$ 11,281,000,000	$ 11,030,000,000
MidAmerican Funding, LLC \| Unsecured 364-day credit facility, $4 million, expiring June \| MHC, Inc. \| Line of credit
Line of Credit Facility [Line Items]
Credit facilities	4,000,000
Outstanding balance on credit facility	$ 0	$ 0

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant