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Consolidated Statements of Comprehensive Income - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest $ 320.0 $ 33.0
Other comprehensive income (loss)    
Other comprehensive loss, net of tax (6.0) (22.0)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest 313.0 11.0
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest (1.0) 0.0
Comprehensive income (loss) attributed to LP 314.0 11.0
Foreign currency translation adjustments    
Other comprehensive income (loss)    
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax (7.0) (23.0)
Amortization of pension and post-retirement prior service costs and net loss    
Other comprehensive income (loss)    
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax $ 0.0 $ 1.0