Assets and Liabilities of Discontinued Operations (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014
Current assets:
Cash and cash equivalents	$ 0.1		$ 0.4
Trade accounts receivable, net	106.0
Other current assets	13.1	$ 1.0
Total current assets of discontinued operations	0.1	18.0
Noncurrent assets:
Property, plant and equipment, net	324.9	0.1
Goodwill	84.5
Total noncurrent assets of discontinued operations		20.0
Current liabilities:
Accrued liabilities	51.3	7.1
Long-term debt due within one year	1.5
Total current liabilities of discontinued operations	0.3	8.1
Noncurrent liabilities:
Long-term debt:	339.8
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
Other current assets		1.1
Total current assets of discontinued operations	0.1	18.0
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	0.1	2.9
Accrued liabilities	0.2	0.3
Line of credit		1.0
Long-term debt due within one year		3.9
Total current liabilities of discontinued operations	0.3	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