Assets and Liabilities of Discontinued Operations (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 0.1	$ 1.0	$ 0.2
Trade accounts receivable, net	77.2
Prepaid expenses, supplies, and other current assets	24.7	1.0
Total current assets of discontinued operations	0.3	18.1
Noncurrent assets:
Property, plant and equipment, net	301.5	0.1
Goodwill	104.3
Total noncurrent assets of discontinued operations		20.0
Current liabilities:
Accrued liabilities	51.8	7.1
Long-term debt due within one year	2.3
Total current liabilities of discontinued operations	0.1	8.1
Noncurrent liabilities:
Long-term debt	312.1
Repurchase reserve	0.7	5.5
Total noncurrent liabilities of discontinued operations	0.7	15.2
Discontinued Operations
Current assets:
Cash and cash equivalents	0.1	1.0
Trade accounts receivable, net		4.5
Inventories		11.4
Prepaid expenses, supplies, and other current assets	0.2	1.2
Total current assets of discontinued operations	0.3	18.1
Noncurrent assets:
Property, plant and equipment, net		0.3
Intangible assets, net		1.6
Goodwill		17.8
Other noncurrent assets		0.3
Total noncurrent assets of discontinued operations		20.0
Current liabilities:
Trade payables		2.9
Accrued liabilities	0.1	0.3
Line of credit		1.0
Long-term debt due within one year		3.9
Total current liabilities of discontinued operations	0.1	8.1
Noncurrent liabilities:
Long-term debt		9.7
Repurchase reserve	0.7	5.5
Total noncurrent liabilities of discontinued operations	$ 0.7	$ 15.2