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Commitments and Contingent Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2015
Commitments and Contingent Liabilities [Abstract] |
Schedule of water cost purchased |
|  | (Millions of Dollars) |
|  | Years Ended December 31, |
Purchased Water |  | 2015 |  |  | 2014 |  |  | 2013 |
Untreated |  | $ | 2.5 |  |  | $ | 2.4 |  |  | $ | 2.4 |
Treated |  |  | 3.1 |  |  |  | 3.1 |  |  |  | 3.2 |
Total Costs |  | $ | 5.6 |  |  | $ | 5.5 |  |  | $ | 5.6 |

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- Definition Tabular disclosure of arrangements in which the entity has agreed to procure goods or services from one or more suppliers. May include identification of the goods or services to be purchased, identity of the seller, pricing, effects on pricing for failing to reach minimum quantities required to be purchased (such as penalties), cancellation rights, and termination provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph 25 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 25 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 17 -Article 9 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 7 + Details
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