INVENTORIES - COMPONENTS OF INVENTORY (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Purchased materials and component parts	$ 358.2	$ 322.7
Work-in-process	845.2	722.7
Finished goods	55.5	46.5
Inventories	$ 1,258.9	$ 1,091.9