Transfer of Nonregulated Energy Operations Transfer of Nonregulated Energy Operations - MEC (Details) - Unregulated Retail Services [Member] - MidAmerican Energy Company [Member] $ in Millions	12 Months Ended
Dec. 31, 2015 USD ($)
Subsequent Event [Line Items]
Unregulated retail services net assets	$ 88
Unregulated retail services operating revenue	905
Unregulated retail services operating income	22
Unregulated retail services net income	16
Unregulated retail services cash flows from operating activities	$ 30

Amount of net assets attributable to disposal group, including, but not limited to discontinued operation.

No definition available.

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- Definition

Amount of net income (loss) attributable to disposal group, including, but not limited to, discontinued operation.

+ References

No definition available.

+ Details

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- Definition

Amount of cash flows from operating activities attributable to disposal group, including but not limited to discontinued operation.

+ References

No definition available.

+ Details

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- Definition

Amount of operating income (loss) attributable to disposal group, including, but not limited to, discontinued operation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5B
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=51717284&loc=SL51721673-107760

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- Definition

Amount of revenue attributable to disposal group, including, but not limited to, discontinued operation.

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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

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- Details

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