Employee Benefit Plans (Reconciliation of Level 3 Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	$ 630.7
Defined Benefit Plan, Actual Return on Plan Assets [Abstract]
Fair value of plan assets at end of year		$ 630.7
Pension Benefits
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	630.7	677.2
Defined Benefit Plan, Actual Return on Plan Assets [Abstract]
Foreign currency exchange rate changes	(97.9)	(35.6)
Fair value of plan assets at end of year	601.7	630.7
Pension Benefits | Alternative Investments
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	111.6
Defined Benefit Plan, Actual Return on Plan Assets [Abstract]
Fair value of plan assets at end of year	36.8	111.6
Pension Benefits | Miscellaneous Funds
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	21.7
Defined Benefit Plan, Actual Return on Plan Assets [Abstract]
Fair value of plan assets at end of year	21.4	21.7
Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	24.1
Defined Benefit Plan, Actual Return on Plan Assets [Abstract]
Fair value of plan assets at end of year		24.1
Level 3 | Pension Benefits
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	24.1	23.7
Defined Benefit Plan, Actual Return on Plan Assets [Abstract]
Related to assets still held at reporting	1.0	2.6
Relating to assets sold during period	0.0	0.1
Purchases, sales and /or settlements	(0.8)	0.2
Foreign currency exchange rate changes	(0.5)	(2.5)
Fair value of plan assets at end of year	23.8	24.1
Level 3 | Pension Benefits | Alternative Investments
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	2.4	0.9
Defined Benefit Plan, Actual Return on Plan Assets [Abstract]
Related to assets still held at reporting	0.0	1.0
Relating to assets sold during period	0.0	0.1
Purchases, sales and /or settlements	0.0	0.4
Foreign currency exchange rate changes	0.0	0.0
Fair value of plan assets at end of year	2.4	2.4
Level 3 | Pension Benefits | Miscellaneous Funds
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	21.7	22.8
Defined Benefit Plan, Actual Return on Plan Assets [Abstract]
Related to assets still held at reporting	1.0	1.6
Relating to assets sold during period	0.0	0.0
Purchases, sales and /or settlements	(0.8)	(0.2)
Foreign currency exchange rate changes	(0.5)	(2.5)
Fair value of plan assets at end of year	$ 21.4	$ 21.7