Defined Benefit Plans (Components of Net Periodic Benefit Cost of Defined Benefit Pension Pans) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ (9.8)	$ (11.2)	$ (19.6)	$ (22.1)
Net periodic benefit cost	(3.5)	(2.9)	(8.1)	(6.0)
Defined benefit pension plans | Domestic plan | U.S. pension benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	(1.6)	(2.1)	(3.2)	(4.2)
Interest cost	(22.2)	(20.2)	(44.5)	(40.4)
Expected return on plan assets	31.6	33.1	63.2	66.2
Amortization of actuarial gain (loss)	(6.2)	(7.8)	(12.5)	(15.6)
Amortization of prior service (cost) credit	(0.3)	(0.2)	(0.5)	(0.5)
Net periodic benefit cost	1.3	2.8	2.5	5.5
Defined benefit pension plans | Non-U.S. pension benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	(8.1)	(8.9)	(16.2)	(17.6)
Interest cost	(6.6)	(6.6)	(13.3)	(13.3)
Expected return on plan assets	10.9	11.9	21.8	24.0
Amortization of actuarial gain (loss)	0.1	(1.5)	0.2	(3.0)
Amortization of prior service (cost) credit	(1.2)	0.1	(2.4)	0.2
Curtailment gain recognized	1.1	0.0	1.1	0.0
Settlement loss recognized	(0.1)	0.0	(0.1)	(0.4)
Net periodic benefit cost	$ (3.9)	$ (5.0)	$ (8.9)	$ (10.1)