Defined Benefit Plans (Components of Net Periodic Benefit Cost of Defined Benefit Pension Pans) (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 03, 2020	Mar. 29, 2019
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ (6.1)	$ (7.5)
Net periodic benefit (cost)	(0.8)	(2.4)
Defined benefit pension plans | U.S. pension benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.0	(1.6)
Interest cost	(16.6)	(22.2)
Expected return on plan assets	29.1	31.6
Amortization of actuarial loss	(9.0)	(6.2)
Amortization of prior service (cost) credit	(0.2)	(0.2)
Net periodic benefit (cost)	3.3	1.4
Defined benefit pension plans | Non-U.S. pension benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	(6.0)	(5.8)
Interest cost	(4.5)	(6.2)
Expected return on plan assets	8.9	10.1
Amortization of actuarial loss	(2.4)	(1.1)
Amortization of prior service (cost) credit	0.3	0.0
Net periodic benefit (cost)	$ (3.7)	$ (3.0)