Employee Benefit Plans (Amounts Recognized in AOCI and Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Changes recognized in other comprehensive income (loss):
Total recognized in other comprehensive income	$ (9.3)	$ (7.3)	$ (6.3)
Pension Benefits [Member]
Amounts recognized in other comprehensive income (loss):
Prior service costs	(0.9)	(0.8)
Actuarial loss	(199.4)	(194.6)
Subtotal	(200.3)	(195.4)
Deferred taxes	49.5	71.2
Net amount recognized	(150.8)	(124.2)
Changes recognized in other comprehensive income (loss):
Current year prior service costs	0.3	0.1
Current year actuarial loss	15.7	3.7
Effect of exchange rates	(1.1)	1.7
Amortization of prior service (costs) credits	(0.1)	(0.2)
Amortization of actuarial loss	(9.9)	(8.8)
Total recognized in other comprehensive income	4.9	(3.5)
Total recognized in net periodic benefit cost and other comprehensive income (loss)	13.7	$ 1.8
Estimated prior service (cost) credits	(0.1)
Estimated actuarial gains (losses)	$ (7.9)