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Goodwill and Other Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill and other intangible assets	$ 25.0	$ 25.0
Productive Land [Member]
Goodwill [Line Items]
Timber and Timberlands	33.0	34.0
Amortization of Intangible Assets	(1.0)
Developed Technology Rights [Member]
Goodwill [Line Items]
Amortization of Intangible Assets	(1.0)
Finite-Lived Intangible Assets, Net	18.0	19.0
Other Intangible Assets [Member]
Goodwill [Line Items]
Amortization of Intangible Assets	0.0
Finite-Lived Intangible Assets, Net	$ 2.0	$ 3.0

X

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

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X

- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

Amount before accumulated depreciation and depletion of forest crops and land devoted primarily to the growth and harvest of forest crops for commercial purposes.

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