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Share-Based Compensation Plans (Schedule of Weighted-Average Assumptions for Stock Options) (Details) - Stock Options
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Contractual term 10 years    
2019      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Risk-free rate   2.40%  
Expected term   7 years  
Expected Avon volatility   45.00%  
Expected dividends   0.00%  
2018      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Risk-free rate     2.70%
Expected term     7 years
Expected Avon volatility     42.00%
Expected dividends     0.00%