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. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ (11.2)	$ (10.0)	$ (22.1)	$ (19.8)
Net periodic pension benefit (cost)	(2.9)	(3.0)	(6.0)	(5.9)
Defined benefit pension plans | U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost	(2.1)	(1.9)	(4.2)	(3.8)
Interest cost	(20.2)	(21.0)	(40.4)	(42.0)
Expected return on plan assets	(33.1)	(32.9)	(66.2)	(65.8)
Amortization of actuarial loss	7.8	6.6	15.6	13.2
Amortization of prior service credit	(0.2)	0.0	(0.5)	0.0
Net periodic pension benefit (cost)	2.8	3.4	5.5	6.8
Defined benefit pension plans | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost	(8.9)	(7.9)	(17.6)	(15.6)
Interest cost	(6.6)	(6.5)	(13.3)	(12.8)
Expected return on plan assets	(11.9)	(10.5)	(24.0)	(20.7)
Amortization of actuarial loss	1.5	1.9	3.0	3.8
Amortization of prior service credit	0.1	0.1	0.2	0.2
Settlement loss recognized	0.0	0.0	(0.4)	0.0
Net periodic pension benefit (cost)	$ (5.0)	$ (5.7)	$ (10.1)	$ (11.3)