Summarized Balance Sheet Information of Reportable Segments (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014
Current assets:
Cash and cash equivalents	$ 38.5	$ 62.0	$ 44.5
Trade accounts receivable, net	106.0
Financing receivable	52.2
Inventories	123.2
Other current assets	13.1	1.0
Total current assets	333.1	86.1
Property, plant and equipment, net	324.9	0.1
Other noncurrent assets	6.9	1.1
TOTAL ASSETS	773.2	121.9
Current liabilities:
Trade payables	128.0
Accrued liabilities	51.3	7.1
Total current liabilities	181.5	15.2
Accrued pension benefits	45.7
Environmental liabilities	18.4
Other noncurrent liabilities	8.9	0.3
TOTAL LIABILITIES	612.3	$ 36.3
RANA
Current assets:
Cash and cash equivalents	9.1
Trade accounts receivable, net	87.5
Inventories	79.1
Other current assets	4.5
Total current assets	180.2
Property, plant and equipment, net	218.2
Other noncurrent assets	4.2
TOTAL ASSETS	402.6
Current liabilities:
Trade payables	73.2
Accrued liabilities	34.4
Total current liabilities	107.6
Environmental liabilities	18.4
TOTAL LIABILITIES	126.0
RAEU
Current assets:
Cash and cash equivalents	8.8
Trade accounts receivable, net	18.5
Financing receivable	52.2
Inventories	44.1
Other current assets	2.4
Total current assets	126.0
Property, plant and equipment, net	106.6
Other noncurrent assets	1.7
TOTAL ASSETS	234.3
Current liabilities:
Trade payables	54.5
Accrued liabilities	15.3
Total current liabilities	69.8
Accrued pension benefits	45.7
Other noncurrent liabilities	1.8
TOTAL LIABILITIES	$ 117.3