Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Income Tax [Line Items]
Net tax benefit related to changes in valuation allowance	$ (76.8)	[1]	$ (41.0)	[1]	$ (30.1)	[1]
Federal AMT Credit carryforwards	31		31
Federal net operating loss carry-forwards	15
State net operating loss carry-forwards	7		7
Foreign net operating loss carry-forwards	10
Undistributed foreign earnings	74
Accrued interest related to uncertain tax positions	0.7		0.7
Unrecognized tax benefits that would affect effective tax rate if recognized	5.3		8.0
Domestic Tax Authority [Member]
Income Tax [Line Items]
Net operating loss carry-forwards expiration period	17 years
State and Local Jurisdiction [Member] | Minimum [Member]
Income Tax [Line Items]
Net operating loss carry-forwards expiration period	1 year
State and Local Jurisdiction [Member] | Maximum [Member]
Income Tax [Line Items]
Net operating loss carry-forwards expiration period	20 years
Foreign Tax Authority [Member] | Canada [Member]
Income Tax [Line Items]
Cash and Short term investments	53
Foreign Tax Authority [Member] | China [Member]
Income Tax [Line Items]
Cash and Short term investments	$ 8
Foreign Tax Authority [Member] | Minimum [Member]
Income Tax [Line Items]
Net operating loss carry-forwards expiration period	1 year
Foreign Tax Authority [Member] | Maximum [Member]
Income Tax [Line Items]
Net operating loss carry-forwards expiration period	5 years

[1] The 2012 change in valuation allowance includes a benefit from the use of U.S. federal and state net operating loss carryforwards totaling approximately $22 million.