Employee Benefits - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Contribution to benefit plans		$ 9.0
Pension and other post retirement total non-cash settlement expense	$ 96.4
Selling, General and Administrative Expenses
Defined Benefit Plan Disclosure [Line Items]
Pension and other post retirement total non-cash settlement expense	20.4
Income from Discontinued Operations, Net of Tax
Defined Benefit Plan Disclosure [Line Items]
Pension and other post retirement total non-cash settlement expense	$ 76.0
Pension and Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Pension and other postretirement expected contributions in current year		$ 17.0