Subsequent Events (Details) (USD $) In Millions, unless otherwise specified	17 Months Ended
Dec. 31, 2013	Aug. 01, 2012
Subsequent Event [Line Items]
Expected Payments to Aquire Propoerty, Plant and Equipment		$ 70
Expected Additional Capital Expenditures for Chesapeake Transaction	$ 325

The expected cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

No definition available.

Name:	oge_ExpectedPaymentsToAquirePropoertyPlantAndEquipment
Namespace Prefix:	oge_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant