Schedule I MidAmerican Funding, LLC Condensed Financial Statements Condensed Financial Statements - Notes (Details) (MidAmerican Funding LLC [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Condensed Financial Statements, Captions [Line Items]
Net amounts paid by affiliate	$ 13	$ 218	$ 21
MHC, Inc. [Member]
Condensed Financial Statements, Captions [Line Items]
Net amounts paid by affiliate	$ 13	$ 218	$ 21

- Definition

The increase (decrease) during the reporting period in the obligations due for goods and services provided by the following types of related parties: a parent company and its subsidiaries, subsidiaries of a common parent, an entity and trust for the benefit of employees, such as pension and profit-sharing trusts that are managed by or under the trusteeship of the entities' management, an entity and its principal owners, management, or member of their immediate families, affiliates, or other parties with the ability to exert significant influence.

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