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Share-Based Compensation Plans (Schedule of Weighted-Average Assumptions for Stock Options) (Details) - Employee Stock Option
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
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%  
2017      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Risk-free rate     2.10%
Expected term     7 years
Expected Avon volatility     41.00%
Expected dividends     0.00%