XML 64 R60.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Commitments, Guarantees and Contingencies - Solid and Hazardous Waste (Details) (Manufactured Gas Plant Site [Member], USD $) In Millions, unless otherwise specified | Mar. 31, 2012
--- | ---
Manufactured Gas Plant Site [Member] |
Solid and Hazardous Waste [Line Items] |
Remediation Costs Liability | $ 0.5

X
- Details
Name: | us-gaap_EnvironmentalExitCostLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying amount of the liability for remediation of environmental damage pertaining to assets or businesses previously disposed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section Y -Paragraph Question 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.Y.Q4) -URI http://asc.fasb.org/extlink&oid=6572457&loc=d3e149879-122751 + Details
Name: | us-gaap_EnvironmentalExitCostsAssetsPreviouslyDisposedLiabilityForRemediation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant