XML 92 R78.htm IDEA: XBRL DOCUMENT v3.6.0.2
Retirement Benefits (Details 1) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]      
Defined Contribution Plan, Cost Recognized $ 34.5 $ 41.2 $ 21.9
Pension Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost - benefits earned during the year 20.6 22.8 29.4
Interest cost on benefits earned in prior years 125.4 121.0 133.6
Expected return on plan assets (148.7) (168.3) (184.2)
Amortization of prior service cost (credit) 1.3 1.3 2.3
Amortization of net actuarial loss 65.4 60.4 74.0
Curtailment (gain) loss 0.0 0.0 0.5
Termination benefits 1.1 0.0 0.3
Total retirement benefit expense 65.1 37.2 55.9
Other Postretirement Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost - benefits earned during the year 2.6 2.7 2.9
Interest cost on benefits earned in prior years 16.0 17.9 24.0
Expected return on plan assets (0.1) (0.1) (0.3)
Amortization of prior service cost (credit) (1.7) 4.9 (3.0)
Amortization of net actuarial loss 9.6 14.6 14.1
Curtailment (gain) loss 0.0 0.0 (25.5)
Termination benefits 2.3 0.0 0.0
Total retirement benefit expense $ 28.7 $ 40.0 12.2
Other Postretirement Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Contribution Plan, Cost Recognized     $ 2.6