Restructuring Restructuring Expected Costs, Costs To-Date, Remaining Costs, and Costs During the Period (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended			15 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013		Jun. 30, 2012	Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Total expected costs at period end			$ 74,145
Costs Recognized in Prior Periods						69,747
Costs recognized during the period ended	3,385	7,720	4,398		8,509
Remaining Costs to be Recognized at Period End			0	[1]
Employee severance costs
Restructuring Cost and Reserve [Line Items]
Total expected costs at period end			46,850
Costs Recognized in Prior Periods						44,196
Costs recognized during the period ended			2,654
Remaining Costs to be Recognized at Period End			0	[1]
Asset Impairment and Net (Gain) Loss on Sale or Disposal [Member]
Restructuring Cost and Reserve [Line Items]
Total expected costs at period end			20,332
Costs Recognized in Prior Periods						20,305
Costs recognized during the period ended			27
Remaining Costs to be Recognized at Period End			0	[1]
Other restructuring costs
Restructuring Cost and Reserve [Line Items]
Total expected costs at period end			6,963
Costs Recognized in Prior Periods						5,246
Costs recognized during the period ended			1,717
Remaining Costs to be Recognized at Period End			0	[1]
Energy [Member]
Restructuring Cost and Reserve [Line Items]
Total expected costs at period end			53,385
Costs Recognized in Prior Periods						53,190
Costs recognized during the period ended			195
Remaining Costs to be Recognized at Period End			0	[1]
Water [Member]
Restructuring Cost and Reserve [Line Items]
Total expected costs at period end			15,675
Costs Recognized in Prior Periods						14,556
Costs recognized during the period ended			1,119
Remaining Costs to be Recognized at Period End			0	[1]
Corporate Unallocated [Member]
Restructuring Cost and Reserve [Line Items]
Total expected costs at period end			5,085
Costs Recognized in Prior Periods						2,001
Costs recognized during the period ended			3,084
Remaining Costs to be Recognized at Period End			$ 0	[1]

[1] There are no significant restructuring costs expected to be incurred after June 30, 2013 for these restructuring projects.