Segment Reporting, Disclosure of Major Customers

For the three months ended September 30, 2015, no single customer represented more than 10% of total Company or the Gas, or Water operating segment revenues.

For the nine months ended September 30, 2015 and 2014 and the three months ended September 30, 2014, no single customer represented more than 10% of total Company or the Electricity, Gas, or Water operating segment revenues.

Revenue, Major Customer [Line Items]

Concentration Risk, Percentage

11.00%

Segment Information Major Customers (Details)	3 Months Ended		9 Months Ended
Segment Information Major Customers (Details)	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue, Major Customer [Line Items]
Segment Reporting, Disclosure of Major Customers	For the three months ended September 30, 2015, no single customer represented more than 10% of total Company or the Gas, or Water operating segment revenues.		For the nine months ended September 30, 2015 and 2014 and the three months ended September 30, 2014, no single customer represented more than 10% of total Company or the Electricity, Gas, or Water operating segment revenues.
Revenue [Member] \| Threshold for Reporting Customer Concentration [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	10.00%	10.00%	10.00%	10.00%
Revenue [Member] \| Threshold for Reporting Customer Concentration [Member] \| Electricity Operating Segment [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	11.00%