Benefit Plans (Textuals) (Details) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Pension settlement charge		$ 50.4	$ 0.0	$ 0.0
401 (k) plan contributions		4.8	4.3	4.0
Accumulated benefit obligation		238.9	391.0
Expected contribution to the plan		$ 6.5
Assumed healthcare cost trend rate, benefit obligation		7.00%
Ultimate healthcare cost trend rate, benefit obligation		5.00%
Effect of one percentage point increase on benefit obligation		$ 0.4
Effect of one percentage point decrease on benefit obligation		$ 0.4
Assumed healthcare cost trend rate, net periodic benefit cost		7.00%
Ultimate healthcare cost trend rate, net periodic benefit cost		5.00%
Effect of one percentage point increase on service and interest cost		$ 0.1
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Annuity Purchase		47.0
Settlement	$ 139.4
Defined Benefit Plan, Benefit Obligation	$ 313.6
Number of Employees & Beneficiaries Affected by Settlement	1,750
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension settlement charge		50.4	$ 0.0	$ 0.0
Actuarial net loss that will be amortized from accumulated other comprehensive loss		4.6
Transition obligation that will be amortized from accumulated other comprehensive loss		0.1
Prior service credit that will be amortized from accumulated other comprehensive loss		$ 1.4
Discount rate		4.22%	3.96%
Rate of compensation increase		4.07%	4.14%
Long-term rate of return on assets		6.84%	7.01%	7.12%
Settlement		$ 149.7	$ 0.0
Defined Benefit Plan, Benefit Obligation		246.3	398.5	$ 360.8
International Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation		55.5	$ 60.2
Expected contribution to the plan		$ 2.0
Discount rate		3.19%	2.99%
Rate of compensation increase		2.73%	2.74%
U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate		4.55%	4.15%
Rate of compensation increase		4.25%	4.25%
Percentage of global plan assets		85.00%
Long-term rate of return on assets		7.25%	7.25%	7.25%
U.S. SERP Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to the plan		$ 4.5
Other Retirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension settlement charge		0.0	$ 0.0	$ 0.0
Actuarial net loss that will be amortized from accumulated other comprehensive loss		1.4
Expected contribution to the plan		$ 0.7
Discount rate		4.30%	3.90%
Settlement		$ 0.0	$ 0.0
Defined Benefit Plan, Benefit Obligation		$ 10.2	$ 10.1	$ 9.2