Pension Benefit Plans (Components Of Net Periodic Pension Costs) (Details) - Pension benefit plans - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ (42.2)	$ (40.0)	$ (45.4)
Net periodic pension benefit (cost)	(2.2)	(6.8)	$ (26.2)
Non-U.S. plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	(35.5)	(32.7)
Interest cost	(25.1)	(25.5)
Expected return on plan assets	46.9	42.4
Amortization of prior service (cost) credit	0.5	0.3
Amortization of net loss	(6.0)	(7.8)
Curtailment and settlement gains recognized	4.9	0.5
Net periodic pension benefit (cost)	(14.3)	(22.8)
United States | Domestic plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	(6.7)	(7.3)
Interest cost	(81.0)	(82.3)
Expected return on plan assets	132.0	130.5
Amortization of prior service (cost) credit	(0.9)	0.0
Amortization of net loss	(31.3)	(24.9)
Curtailment and settlement gains recognized	0.0	0.0
Net periodic pension benefit (cost)	$ 12.1	$ 16.0