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Fair Value Measurements Impairment losses (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Asset Impairment Charges	$ 0.1	$ 4.4	$ 74.0
Fair Value, Inputs, Level 2
Schedule of Available-for-sale Securities [Line Items]
Impairment charge of assets no longer used		4.4	6.9
Impairment of Long-Lived Assets Held-for-use			4.9
Houlton
Schedule of Available-for-sale Securities [Line Items]
Asset Impairment Charges			$ 62.0

X

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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