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Contingency Reserves Hardboard Contingencies Rollforward (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Loss Contingency Accrual [Roll Forward]
Beginning Balance, December 31	$ 14.8	$ 15.3
Ending Balance	14.8	15.3
Hardboard Siding Reserves [Member]
Loss Contingency Accrual [Roll Forward]
Beginning Balance, December 31	0.3	0.4
Ending Balance	$ 0.3	$ 0.4

X

- Definition

Amount of loss contingency liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration