XML 53 R23.htm IDEA: XBRL DOCUMENT
v3.2.0.727

ENVIRONMENTAL MATTERS (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2015
Environmental Obligations Recognized by Company | The following table sets forth a summary of changes in the Company’s liability for Environmental Obligations for the six months ended June 30, 2015 and 2014.
Environmental Obligations |  |  |  |  |  |  |  |  |
|  | ($ millions) |
|  | Fitchburg |  |  | Northern Utilities |  |  | Total |
|  | Six months ended June 30, |
|  | 2015 |  |  | 2014 |  |  | 2015 |  |  | 2014 |  |  | 2015 |  |  | 2014 |
Total Balance at Beginning of Period |  | $ | 1.9 |  |  | $ | 12.0 |  |  | $ | 3.6 |  |  | $ | 2.8 |  |  | $ | 5.5 |  |  | $ | 14.8 |
Additions |  |  | 0.1 |  |  |  | 5.5 |  |  |  | 0.2 |  |  |  | 0.6 |  |  |  | 0.3 |  |  |  | 6.1 |
Less: Payments / Reductions |  |  | 0.2 |  |  |  | 12.3 |  |  |  | 0.2 |  |  |  | 0.2 |  |  |  | 0.4 |  |  |  | 12.5 |
Total Balance at End of Period |  |  | 1.8 |  |  |  | 5.2 |  |  |  | 3.6 |  |  |  | 3.2 |  |  |  | 5.4 |  |  |  | 8.4 |
Less: Current Portion |  |  | 1.8 |  |  |  | 5.2 |  |  |  | 1.6 |  |  |  | 1.2 |  |  |  | 3.4 |  |  |  | 6.4 |
Noncurrent Balance at End of Period |  | $ | — |  |  | $ | — |  |  | $ | 2.0 |  |  | $ | 2.0 |  |  | $ | 2.0 |  |  | $ | 2.0 |

X
- Definition Tabular disclosure of environmental loss contingencies by individual site. Does not include loss contingencies that are not environmental in nature. + References Reference 1: 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.Q2) -URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 10 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13237-110859 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13283-110859 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13296-110859 + Details
Name: | us-gaap_ScheduleOfEnvironmentalLossContingenciesBySiteTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration