Postretirement Benefit Plans - Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Components of net periodic benefit cost:
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	$ (26.6)	$ (461.8)
Foreign Pension Plan [Member]
Components of net periodic benefit cost:
Service cost	1.4	2.2	$ 2.4
Interest cost	10.5	12.3	17.7
Expected return on plan assets	(10.3)	(16.7)	(23.7)
Amortization of prior service cost	0.1	0.1	0.1
Defined Benefit Plan, Amortization of Gains (Losses)			(5.3)
Net periodic benefit cost from discontinued operations	0.0	0.0	0.4
Net periodic benefit cost	15.8	9.1	3.0
Pension Plan [Member]
Components of net periodic benefit cost:
Service cost	13.1	15.4	21.5
Interest cost	26.6	45.6	98.3
Expected return on plan assets	(29.8)	(62.6)	(152.0)
Amortization of prior service cost	1.7	2.8	3.5
Defined Benefit Plan, Amortization of Gains (Losses)			(55.6)
Net periodic benefit cost from discontinued operations	0.0	0.0	(8.0)
Net periodic benefit cost	41.9	488.7	51.6
Postretirement Benefit Plans [Member]
Components of net periodic benefit cost:
Service cost	0.3	0.4	1.3
Interest cost	11.0	10.9	16.7
Expected return on plan assets	(6.6)	(7.1)	(8.5)
Amortization of prior service cost	1.0	0.8	1.0
Defined Benefit Plan, Amortization of Gains (Losses)	0.0	(0.1)	0.0
Net periodic benefit cost from discontinued operations	0.0	0.0	(3.1)
Net periodic benefit cost	$ 5.8	$ 5.1	$ 7.4