Unusual Items - Schedule of Unusual Items Expense (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2016	Nov. 30, 2015	Nov. 30, 2014
Unusual or Infrequent Item [Line Items]
Loss on debt	$ 0.0	$ 34.5	$ 1.9	$ 60.8
Unusual items	0.4	34.5	51.9	61.7
Aerospace and Defense
Unusual or Infrequent Item [Line Items]
Loss on legal matters and settlements	0.4	0.0	50.0	0.9
Unusual items	0.4	0.0	50.0	0.9
Corporate
Unusual or Infrequent Item [Line Items]
Loss on debt	0.0	34.4	1.9	60.6
Loss on bank amendment	0.0	0.1	0.0	0.2
Unusual items	$ 0.0	$ 34.5	$ 1.9	$ 60.8