Defined Benefit Plans (Components of Net Periodic Benefit Cost of Defined Benefit Pension Pans) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 29, 2019	Mar. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ (9.8)	$ (10.9)
Net periodic benefit cost	(4.6)	(3.1)
Defined benefit pension plans | Domestic plan | U.S. pension benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	(1.6)	(2.1)
Interest cost	(22.3)	(20.2)
Expected return on plan assets	31.6	33.1
Amortization of actuarial (gain) loss	(6.3)	(7.8)
Amortization of prior service (cost) credit	(0.2)	(0.3)
Net periodic benefit cost	1.2	2.7
Defined benefit pension plans | Non-U.S. pension benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	(8.1)	(8.7)
Interest cost	(6.7)	(6.7)
Expected return on plan assets	10.9	12.1
Amortization of actuarial (gain) loss	0.1	(1.5)
Amortization of prior service (cost) credit	(1.2)	0.1
Settlement loss recognized	0.0	(0.4)
Net periodic benefit cost	$ (5.0)	$ (5.1)