Goodwill and Other Intangible Assets (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Goodwill [Line Items]
Timber and Timberlands	$ 40,000,000	$ 41,000,000
Additions to Timberlands	0
Goodwill additions	10,000,000
Additions to goodwill and other intangibles	25,000,000
Amortization of Intangible Assets	(1,000,000)
Goodwill and other intangible assets	26,000,000	16,100,000
Goodwill and other intangibles	91,000,000	67,000,000
Developed Technology Rights [Member]
Goodwill [Line Items]
Additions to finite-lived Intangible Assets	12,000,000
Amortization of Intangible Assets	0
Finite-Lived Intangible Assets, Net	22,000,000	10,000,000
Other Intangible Assets [Member]
Goodwill [Line Items]
Additions to finite-lived Intangible Assets	3,000,000
Amortization of Intangible Assets	0
Finite-Lived Intangible Assets, Net	3,000,000	$ 0
Productive Land [Member]
Goodwill [Line Items]
Amortization of Intangible Assets	$ 1,000,000