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Summary of Significant Accounting Policies Per Common Share Information (Details) - shares
shares in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Earnings Per Share [Abstract]      
Dilutive effect of share-based compensation (in shares) 5.5 5.5 6.8
Antidilutive share-based compensation awards (in shares) 2.2 1.8 0.1