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Business Acquisition - Narrative (Details) - USD ($)
$ in Millions
11 Months Ended 12 Months Ended
Feb. 01, 2020
Dec. 31, 2020
Dec. 31, 2020
Business Acquisition [Line Items]      
Business combination, acquisition related costs     $ 3
U.S. Sawmill Business      
Business Acquisition [Line Items]      
Consideration transferred in business acquisition $ 173    
Business combination, revenue of acquiree since acquisition date, actual   $ 137  
Business combination, earnings or loss of acquiree since acquisition date, actual   $ 43