Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Mar. 31, 2016
Business And Significant Accounting Policies [Line Items]
Reclassification of other current assets to debt	$ 9.2
Decrease in long-term debt	58.9
Reclassification of other assets to debt	$ 49.7
Employee Severance [Member]
Business And Significant Accounting Policies [Line Items]
Restructuring Cost		$ 170.0
Cumulative restructuring cost		105.1
Contract Terminations [Member]
Business And Significant Accounting Policies [Line Items]
Restructuring Cost		130.0
Cumulative restructuring cost		$ 105.1