Retirement Benefit Plans (Details) - USD ($) $ in Millions |
3 Months Ended | |
---|---|---|
Mar. 31, 2018 |
Apr. 01, 2017 |
|
Defined Benefit Plan Disclosure [Line Items] | ||
Defined Benefit Plan, Amortization | $ (0.2) | $ 0.8 |
Pension benefits | ||
Defined Benefit Plan Disclosure [Line Items] | ||
Service cost | 2.6 | 2.6 |
Interest cost | 1.4 | 1.4 |
Expected return on plan assets | (1.1) | (1.2) |
Settlements and Curtailments | 0.1 | 0.8 |
Net amortization | 0.0 | 0.3 |
Net periodic benefit cost | 3.0 | 3.9 |
Post-retirement benefits | ||
Defined Benefit Plan Disclosure [Line Items] | ||
Service cost | 0.0 | 0.0 |
Interest cost | 0.1 | 0.2 |
Expected return on plan assets | 0.0 | 0.0 |
Settlements and Curtailments | 0.0 | 0.0 |
Net amortization | (0.3) | (0.3) |
Net periodic benefit cost | (0.2) | (0.1) |
Other Nonoperating Income (Expense) [Member] | ||
Defined Benefit Plan Disclosure [Line Items] | ||
Net periodic benefit cost | $ 0.2 | $ 1.2 |