XML 106 R90.htm IDEA: XBRL DOCUMENT v3.6.0.2
Other Retirement Plans (Schedule of Multiemployer Pension Plans) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Multiemployer Plans [Line Items]      
Multiemployer plans, contributions (in dollars) $ 70.0 $ 32.8 $ 36.4
Multiemployer Plans, Pension [Member]      
Multiemployer Plans [Line Items]      
Multiemployer plans, contributions (in dollars) $ 59.9 23.8 31.9
Multiemployer Plans, Pension [Member] | Central Pension Fund of the I.U.O.E and Participating Employers [Member]      
Multiemployer Plans [Line Items]      
Multiemployer plans, employer identification number 366052390    
Multiemployer plans, plan number 001    
Multiemployer plans, contributions (in dollars) $ 19.3 $ 5.7 6.5
Multiemployer plans, collective bargaining arrangement, expiration date Jun. 01, 2017    
Multiemployer plans, pension protection act zone status Green Green  
Multiemployer plans, pension protection act zone status, date Jan. 31, 2016 Jan. 31, 2015 [1]  
Multiemployer plans, extended amortization provisions   true  
Multiemployer plans, funding improvement plan and rehabilitation plan status NA    
Multiemployer plans, surcharge status No    
Multiemployer Plans, Pension [Member] | Pipeline Industry Pension Fund [Member]      
Multiemployer Plans [Line Items]      
Multiemployer plans, employer identification number 736146433    
Multiemployer plans, plan number 001    
Multiemployer plans, contributions (in dollars) $ 15.9 $ 2.5 4.8
Multiemployer plans, collective bargaining arrangement, expiration date Jun. 02, 2017    
Multiemployer plans, pension protection act zone status Green Green  
Multiemployer plans, pension protection act zone status, date [2] Dec. 31, 2015 Dec. 31, 2014  
Multiemployer plans, Company contributions greater than 5% of total plan contributions true true  
Multiemployer plans, funding improvement plan and rehabilitation plan status NA    
Multiemployer plans, surcharge status No    
Multiemployer Plans, Pension [Member] | Teamsters National Pipe Line Pension Fund [Member]      
Multiemployer Plans [Line Items]      
Multiemployer plans, employer identification number 461102851    
Multiemployer plans, plan number 001    
Multiemployer plans, contributions (in dollars) $ 3.6 $ 1.4 1.7
Multiemployer plans, collective bargaining arrangement, expiration date Jun. 01, 2017    
Multiemployer plans, pension protection act zone status Green Green  
Multiemployer plans, pension protection act zone status, date [2] Dec. 31, 2015 Dec. 31, 2014  
Multiemployer plans, Company contributions greater than 5% of total plan contributions true true  
Multiemployer plans, funding improvement plan and rehabilitation plan status NA    
Multiemployer plans, surcharge status No    
Multiemployer Plans, Pension [Member] | Laborers' National Pension Fund [Member]      
Multiemployer Plans [Line Items]      
Multiemployer plans, employer identification number 751280827    
Multiemployer plans, plan number 001    
Multiemployer plans, contributions (in dollars) $ 3.0 $ 0.8 0.8
Multiemployer plans, collective bargaining arrangement, expiration date Jun. 01, 2017    
Multiemployer plans, pension protection act zone status Green Green  
Multiemployer plans, pension protection act zone status, date Dec. 31, 2015 Dec. 31, 2014  
Multiemployer plans, funding improvement plan and rehabilitation plan status NA    
Multiemployer plans, surcharge status No    
Multiemployer Plans, Pension [Member] | Central Laborers' Pension Fund [Member]      
Multiemployer Plans [Line Items]      
Multiemployer plans, employer identification number 376052379    
Multiemployer plans, plan number 001    
Multiemployer plans, contributions (in dollars) $ 2.6 $ 0.0 0.1
Multiemployer plans, collective bargaining arrangement, expiration date Jun. 01, 2017    
Multiemployer plans, pension protection act zone status Red Red  
Multiemployer plans, pension protection act zone status, date [1] Dec. 31, 2015 Dec. 31, 2014  
Multiemployer plans, extended amortization provisions true true  
Multiemployer plans, funding improvement plan and rehabilitation plan status Implemented    
Multiemployer plans, surcharge status No    
Multiemployer Plans, Pension [Member] | National Electrical Benefit Fund [Member]      
Multiemployer Plans [Line Items]      
Multiemployer plans, employer identification number 530181657    
Multiemployer plans, plan number 001    
Multiemployer plans, contributions (in dollars) $ 1.7 $ 1.4 1.3
Multiemployer plans, pension protection act zone status Green Green  
Multiemployer plans, pension protection act zone status, date Dec. 31, 2015 Dec. 31, 2014  
Multiemployer plans, funding improvement plan and rehabilitation plan status NA    
Multiemployer plans, surcharge status No    
Multiemployer Plans, Pension [Member] | National Electrical Benefit Fund [Member] | Maximum [Member]      
Multiemployer Plans [Line Items]      
Multiemployer plans, collective bargaining arrangement, expiration date Nov. 30, 2018    
Multiemployer Plans, Pension [Member] | Minnesota Laborers Pension Fund [Member]      
Multiemployer Plans [Line Items]      
Multiemployer plans, employer identification number 416159599    
Multiemployer plans, plan number 001    
Multiemployer plans, contributions (in dollars) $ 1.6 $ 0.3 0.2
Multiemployer plans, collective bargaining arrangement, expiration date Jun. 01, 2017    
Multiemployer plans, pension protection act zone status Green Green  
Multiemployer plans, pension protection act zone status, date Dec. 31, 2015 Dec. 31, 2014  
Multiemployer plans, funding improvement plan and rehabilitation plan status NA    
Multiemployer plans, surcharge status No    
Multiemployer Plans, Pension [Member] | I.B.E.W. Local 1249 Pension Plan [Member]      
Multiemployer Plans [Line Items]      
Multiemployer plans, employer identification number 156035161    
Multiemployer plans, plan number 001    
Multiemployer plans, contributions (in dollars) $ 1.1 $ 1.0 0.4
Multiemployer plans, collective bargaining arrangement, expiration date Apr. 30, 2017    
Multiemployer plans, pension protection act zone status Yellow Yellow  
Multiemployer plans, pension protection act zone status, date Dec. 31, 2015 Dec. 31, 2014  
Multiemployer plans, funding improvement plan and rehabilitation plan status Implemented    
Multiemployer plans, surcharge status No    
Multiemployer Plans, Pension [Member] | Minnesota Teamsters Construction Division Pension Plan [Member]      
Multiemployer Plans [Line Items]      
Multiemployer plans, employer identification number 416187751    
Multiemployer plans, plan number 001    
Multiemployer plans, contributions (in dollars) $ 1.1 $ 0.2 0.0
Multiemployer plans, collective bargaining arrangement, expiration date Jun. 01, 2017    
Multiemployer plans, pension protection act zone status Green Green  
Multiemployer plans, pension protection act zone status, date [1] Nov. 30, 2015 Nov. 30, 2014  
Multiemployer plans, extended amortization provisions true true  
Multiemployer plans, funding improvement plan and rehabilitation plan status NA    
Multiemployer plans, surcharge status No    
Multiemployer Plans, Pension [Member] | Local Union No. 9 I.B.E.W. and Outside Contractors Pension Fund [Member]      
Multiemployer Plans [Line Items]      
Multiemployer plans, employer identification number 516077720    
Multiemployer plans, plan number 001    
Multiemployer plans, contributions (in dollars) $ 1.1 $ 0.3 0.4
Multiemployer plans, collective bargaining arrangement, expiration date May 31, 2017    
Multiemployer plans, pension protection act zone status Green Green  
Multiemployer plans, pension protection act zone status, date Oct. 31, 2015 Oct. 31, 2014  
Multiemployer plans, funding improvement plan and rehabilitation plan status NA    
Multiemployer plans, surcharge status No    
Multiemployer Plans, Pension [Member] | Michigan Laborers' Pension Fund [Member]      
Multiemployer Plans [Line Items]      
Multiemployer plans, employer identification number 386233976    
Multiemployer plans, plan number 001    
Multiemployer plans, contributions (in dollars) $ 1.1 $ 0.8 2.1
Multiemployer plans, collective bargaining arrangement, expiration date Jun. 01, 2017    
Multiemployer plans, pension protection act zone status Yellow Yellow  
Multiemployer plans, pension protection act zone status, date Aug. 31, 2016 Aug. 31, 2015 [1]  
Multiemployer plans, extended amortization provisions   true  
Multiemployer plans, funding improvement plan and rehabilitation plan status Implemented    
Multiemployer plans, surcharge status No    
Multiemployer Plans, Pension [Member] | West Virginia Laborers Pension Trust Fund [Member]      
Multiemployer Plans [Line Items]      
Multiemployer plans, employer identification number 556026775    
Multiemployer plans, plan number 001    
Multiemployer plans, contributions (in dollars) $ 0.5 $ 1.4 0.4
Multiemployer plans, collective bargaining arrangement, expiration date Jun. 01, 2017    
Multiemployer plans, pension protection act zone status Green Green  
Multiemployer plans, pension protection act zone status, date Mar. 31, 2016 [2] Mar. 31, 2015  
Multiemployer plans, Company contributions greater than 5% of total plan contributions true    
Multiemployer plans, funding improvement plan and rehabilitation plan status NA    
Multiemployer plans, surcharge status No    
Multiemployer Plans, Pension [Member] | Laborers' District Council of Western Pennsylvania Pension Fund [Member]      
Multiemployer Plans [Line Items]      
Multiemployer plans, employer identification number 256135576    
Multiemployer plans, plan number 001    
Multiemployer plans, contributions (in dollars) $ 0.2 $ 0.5 1.5
Multiemployer plans, collective bargaining arrangement, expiration date Jun. 01, 2017    
Multiemployer plans, pension protection act zone status Red Red  
Multiemployer plans, pension protection act zone status, date Dec. 31, 2015 Dec. 31, 2014  
Multiemployer plans, funding improvement plan and rehabilitation plan status Implemented    
Multiemployer plans, surcharge status No    
Multiemployer Plans, Pension [Member] | Operating Engineers' Local 324 Pension Fund [Member]      
Multiemployer Plans [Line Items]      
Multiemployer plans, employer identification number 381900637    
Multiemployer plans, plan number 001    
Multiemployer plans, contributions (in dollars) $ 0.0 $ 0.0 1.7
Multiemployer plans, collective bargaining arrangement, expiration date Jun. 01, 2017    
Multiemployer plans, pension protection act zone status Red Red  
Multiemployer plans, pension protection act zone status, date Apr. 30, 2016 Apr. 30, 2015  
Multiemployer plans, funding improvement plan and rehabilitation plan status Implemented    
Multiemployer plans, surcharge status No    
Multiemployer Plans, Pension [Member] | Other Funds [Member]      
Multiemployer Plans [Line Items]      
Multiemployer plans, contributions (in dollars) $ 7.1 [3] $ 7.5 [3] 10.0
Multiemployer Plans, Pension [Member] | Other Funds [Member] | Canadian Multiemployer Plans [Member] | Canadian Dollars [Member]      
Multiemployer Plans [Line Items]      
Multiemployer plans, contributions (in dollars) $ 0.9 $ 1.4 $ 0.9
[1] This plan has utilized extended amortization provisions, which provide plans with extensions of time to amortize pension funding shortfalls.
[2] The Company’s contributions to this plan represent greater than 5% of the plan’s total contributions.
[3] The 2016, 2015 and 2014 contributions include approximately $0.9 million, $1.4 million and $0.9 million U.S. dollars, respectively, for Canadian multiemployer pension plans. Canadian multiemployer pension plans are not subject to the provisions of ERISA or the funding rules under the PPA that apply to U.S. registered multiemployer pension plans. Contributions to Canadian multiemployer pension plans are based on fixed amounts per hour per employee for employees covered under these plans.