XML 47 R35.htm IDEA: XBRL DOCUMENT v3.5.0.2
Components of Net Periodic Pension Cost (Detail) - Pension Plans, Defined Benefit - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Defined Benefit Plan Disclosure [Line Items]        
Service cost, net of employee contributions $ 7.5 $ 7.1 $ 22.0 $ 22.1
Interest cost 4.8 5.2 14.2 15.1
Expected return on plan assets (8.0) (7.9) (24.2) (23.5)
Amortization 2.6 3.1 7.8 8.9
Net periodic pension cost $ 6.9 $ 7.5 $ 19.8 $ 22.6