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Earnings Per Share - Narrative (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Restricted Stock Units (RSUs) and Performance-based Restricted Stock Units (PSUs)        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Incremental common shares attributable to dilutive effect of share-based payment arrangements (in shares) 2,656,000 0 0 0