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Restructuring (Tables) | 12 Months Ended
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Dec. 31, 2016
Restructuring Project [Line Items] |
Schedule of Restructuring Reserve by Type of Cost [Table Text Block] | The following table summarizes the activity within the restructuring related balance sheet accounts for the 2016, 2014 and 2013 Projects during the year ended December 31, 2016:
| Accrued Employee Severance |  | Asset Impairments & Net Loss on Sale or Disposal |  | Other Accrued Costs |  | Total
| (in thousands)
Beginning balance, January 1, 2016 | $ | 26,533 |  |  | $ | — |  |  | $ | 3,048 |  |  | $ | 29,581 |
Costs incurred and charged to expense | 39,943 |  |  | 7,188 |  |  | 1,959 |  |  | 49,090 |
Cash payments | (18,452 | ) |  | — |  |  | (2,389 | ) |  | (20,841 | )
Non-cash items | — |  |  | (7,188 | ) |  | — |  |  | (7,188 | )
Effect of change in exchange rates | (2,656 | ) |  | — |  |  | (16 | ) |  | (2,672 | )
Ending balance, December 31, 2016 | $ | 45,368 |  |  | $ | — |  |  | $ | 2,602 |  |  | $ | 47,970 |
2016 Projects [Member] |
Restructuring Project [Line Items] |
Restructuring and Related Costs [Table Text Block] | The total expected restructuring costs, the restructuring costs recognized during the year ended December 31, 2016, and the remaining expected restructuring costs as of December 31, 2016 related to the 2016 Projects are as follows:
| Total Expected Costs at December 31, 2016 |  | Costs Recognized During the Year Ended December 31, 2016 |  | Remaining Costs to be Recognized at December 31, 2016
| (in thousands)
Employee severance costs | $ | 44,186 |  |  | $ | 39,686 |  |  | $ | 4,500 |
Asset impairments & net loss on sale or disposal | 7,219 |  |  | 7,219 |  |  | — |
Other restructuring costs | 16,389 |  |  | 889 |  |  | 15,500 |
Total | $ | 67,794 |  |  | $ | 47,794 |  |  | $ | 20,000 |
Segments: |  |  |  |  |
Electricity | $ | 10,827 |  |  | $ | 8,827 |  |  | $ | 2,000 |
Gas | 34,468 |  |  | 23,968 |  |  | 10,500 |
Water | 20,061 |  |  | 13,061 |  |  | 7,000 |
Corporate unallocated | 2,438 |  |  | 1,938 |  |  | 500 |
Total | $ | 67,794 |  |  | $ | 47,794 |  |  | $ | 20,000 |
2014 Project [Member] |
Restructuring Project [Line Items] |
Restructuring and Related Costs [Table Text Block] | The total expected restructuring costs, the restructuring costs recognized in prior periods, the restructuring costs recognized during the year ended December 31, 2016, and the remaining expected restructuring costs as of December 31, 2016 related to the 2014 Projects are as follows:
| Total Expected Costs at December 31, 2016 |  | Costs Recognized in Prior Periods |  | Costs Recognized During the Year Ended December 31, 2016 |  | Remaining Costs to be Recognized at December 31, 2016
| (in thousands)
Employee severance costs | $ | 34,630 |  |  | $ | 34,373 |  |  | $ | 257 |  |  | $ | — |
Asset impairments & net loss on sale or disposal | 8,849 |  |  | 8,880 |  |  | (31 | ) |  | — |
Other restructuring costs | 4,999 |  |  | 3,929 |  |  | 1,070 |  |  | — |
Total | $ | 48,478 |  |  | $ | 47,182 |  |  | $ | 1,296 |  |  | $ | — |
Segments: |  |  |  |  |  |  |
Electricity | $ | 20,610 |  |  | $ | 21,743 |  |  | $ | (1,133 | ) |  | $ | — |
Gas | 13,631 |  |  | 11,855 |  |  | 1,776 |  |  | — |
Water | 1,995 |  |  | 1,940 |  |  | 55 |  |  | — |
Corporate unallocated | 12,242 |  |  | 11,644 |  |  | 598 |  |  | — |
Total | $ | 48,478 |  |  | $ | 47,182 |  |  | $ | 1,296 |  |  | $ | — |

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- Definition Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 + Details
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- Definition Tabular disclosure of an entity's restructuring reserve that occurred during the period associated with the exit from or disposal of business activities or restructurings for each major type of cost. This element may also include a description of any reversal and other adjustment made during the period to the amount of an accrued liability for restructuring activities. This element may be used to encapsulate the roll forward presentations of an entity's restructuring reserve by type of cost and in total, and explanation of changes that occurred in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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