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Segment Information - Reconciliation of Segment Operating Income to Consolidated Loss Before Income Taxes (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit (loss)	$ (2.7)	$ (27.6)
Interest expense	(5.7)	(4.4)
Other income (expense), net	(8.4)	(1.2)
Cost reduction charges	(25.4)	(26.9)	$ (82.1)	$ (118.5)
Total loss before income taxes	(16.8)	(33.2)
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit (loss)	40.3	18.0
Segment Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Cost reduction charges	(20.1)	(26.9)
Corporate and eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit (loss)	(22.9)	$ (18.7)
Other income (expense), net
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Cost reduction charges	(5.3)
Other income (expense), net \| Foreign currency translation adjustment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Cost reduction charges	$ (5.3)