Balance Sheet Accounts and Supplemental Disclosures - Other Current Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued compensation and employee benefits	$ 105.7	$ 90.4
Income taxes	2.1	20.3
Competitive improvement program obligations (see Note 10)	7.6	9.4
Payable to UTC for Transition Service Agreements	1.3	1.9
Interest payable	4.1	12.9
Contract loss provisions	6.8	9.1
Other	40.2	59.1
Other current liabilities	$ 167.8	$ 203.1