Postretirement Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Components of net periodic benefit cost:
Service cost	$ 3.7	$ 4.6
Interest cost	9.5	16.1
Expected return on plan assets	(10.2)	(22.1)
Amortization of prior service credit	0.4	0.8
Net periodic benefit cost	7.9	223.9
Defined Benefit Plan, Future Amortization of Gain (Loss)	(4.5)	(10.9)
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	0.0	(213.6)
Pension Plan, Defined Benefit [Member]
Components of net periodic benefit cost:
Service cost	3.3	3.9
Interest cost	6.7	13.0
Expected return on plan assets	(7.5)	(17.9)
Amortization of prior service credit	0.4	0.8
Net periodic benefit cost	6.6	223.0
Defined Benefit Plan, Future Amortization of Gain (Loss)	(3.7)	(9.6)
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	0.0	(213.6)
Foreign Pension Plan, Defined Benefit [Member]
Components of net periodic benefit cost:
Service cost	0.4	0.7
Interest cost	2.8	3.1
Expected return on plan assets	(2.7)	(4.2)
Amortization of prior service credit	0.0	0.0
Net periodic benefit cost	1.3	0.9
Defined Benefit Plan, Future Amortization of Gain (Loss)	(0.8)	(1.3)
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	0.0	0.0
Postretirement Benefit Plans [Member]
Components of net periodic benefit cost:
Service cost	0.1	0.1
Interest cost	2.7	2.7
Expected return on plan assets	(1.6)	(1.8)
Amortization of prior service credit	0.2	0.2
Net periodic benefit cost	$ 1.4	$ 1.2