Balance Sheet Accounts - Schedule of Other Current Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015	Nov. 30, 2015	Feb. 28, 2015
Schedule Of Other Liabilities [Line Items]
Accrued compensation and employee benefits	$ 70.1	$ 90.4	$ 90.6
Income taxes	14.8	20.3	15.5
Competitive improvement program obligations (see Note 9)	10.5	9.4	10.7
Interest payable	5.4	12.9	11.7
Contract loss provisions	8.4	9.1	9.3
Other	70.2	59.1	61.6
Other current liabilities	180.5	203.1	201.3	$ 213.5
UTC [Member]
Schedule Of Other Liabilities [Line Items]
Payable to UTC primarily for Transition Service Agreements	$ 1.1	$ 1.9	$ 1.9