Variable Interest Entities (Details) (USD $) In Millions	Jun. 30, 2011
FES
Net exposure to loss based upon the casualty value provisions
Maximum Exposure	$ 1,348
Discounted Lease Payments, net	1,156
Variable Interest Entities Net Exposure	192
OE
Net exposure to loss based upon the casualty value provisions
Maximum Exposure	635
Discounted Lease Payments, net	445
Variable Interest Entities Net Exposure	190
CEI
Net exposure to loss based upon the casualty value provisions
Maximum Exposure	624
Discounted Lease Payments, net	69
Variable Interest Entities Net Exposure	555
TE
Net exposure to loss based upon the casualty value provisions
Maximum Exposure	624
Discounted Lease Payments, net	303
Variable Interest Entities Net Exposure	$ 321

The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph b
-URI http://asc.fasb.org/extlink&oid=6970148&loc=d3e5728-111685

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS140-4/FIN46(R)
-Paragraph C6
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6970148&loc=d3e5747-111685

Name:	us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant