Retirement Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Components of net periodic benefit cost:
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	$ 461.8
Pension Plan, Defined Benefit [Member]
Components of net periodic benefit cost:
Service cost	15.4	$ 21.5	$ 35.7
Interest cost	45.6	98.3	116.2
Expected return on plan assets	(62.6)	(152.0)	(207.6)
Amortization of prior service cost	2.8	3.5	4.5
Defined Benefit Plan, Amortization of Gains (Losses)	31.1	55.6	109.2
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	456.4	32.7	0.0
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments	0.0	0.0	0.0
Defined Benefit Plan, Special Termination Benefits	0.0	0.0	0.0
Net periodic benefit cost from discontinued operations	0.0	(8.0)	(24.2)
Net periodic benefit cost	488.7	51.6	33.8
International Plans [Member]
Components of net periodic benefit cost:
Service cost	2.2	2.4	2.8
Interest cost	12.3	17.7	18.5
Expected return on plan assets	(16.7)	(23.7)	(24.4)
Amortization of prior service cost	0.1	0.1	0.0
Defined Benefit Plan, Amortization of Gains (Losses)	5.2	5.3	7.6
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	4.8	0.8	7.2
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments	0.6	0.0	0.0
Defined Benefit Plan, Special Termination Benefits	0.6	0.0	0.0
Net periodic benefit cost from discontinued operations	0.0	0.4	0.4
Net periodic benefit cost	$ 9.1	$ 3.0	$ 12.1