Financial Statement Presentation and Significant Accounting Policies - Impact on Unaudited Consolidated Statements of Cash Flows Due to Adoption of Amendments in Accounting Updates (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net cash provided by operating activities	$ (17.1)	$ (10.1)
Cash flows from investing activities:
Proceeds from sale of NABCO		0.0
Net cash used in investing activities	(5.3)	(5.3)
Cash flows from financing activities:
Net cash provided by financing activities	17.4	12.6
Effect of exchange rate changes on cash, cash equivalents, restricted cash and restricted cash equivalents	0.0	0.2
Increase (decrease) in cash, cash equivalents, restricted cash and restricted cash equivalents	(5.0)	(2.6)
Cash, cash equivalents, restricted cash and restricted cash equivalents, beginning of period	32.7	43.3
Cash, cash equivalents, restricted cash and restricted cash equivalents, end of period	$ 27.7	40.7
As Previously Reported
Cash flows from operating activities:
Net cash provided by operating activities		(10.1)
Cash flows from investing activities:
Proceeds from sale of NABCO		3.9
Net cash used in investing activities		(1.4)
Cash flows from financing activities:
Net cash provided by financing activities		12.6
Effect of exchange rate changes on cash, cash equivalents, restricted cash and restricted cash equivalents		0.2
Increase (decrease) in cash, cash equivalents, restricted cash and restricted cash equivalents		1.3
Cash, cash equivalents, restricted cash and restricted cash equivalents, beginning of period		35.8
Cash, cash equivalents, restricted cash and restricted cash equivalents, end of period		37.1
Impact of Adoption
Cash flows from operating activities:
Net cash provided by operating activities		0.0
Cash flows from investing activities:
Proceeds from sale of NABCO		(3.9)
Net cash used in investing activities		(3.9)
Cash flows from financing activities:
Net cash provided by financing activities		0.0
Effect of exchange rate changes on cash, cash equivalents, restricted cash and restricted cash equivalents		0.0
Increase (decrease) in cash, cash equivalents, restricted cash and restricted cash equivalents		(3.9)
Cash, cash equivalents, restricted cash and restricted cash equivalents, beginning of period		7.5
Cash, cash equivalents, restricted cash and restricted cash equivalents, end of period		$ 3.6