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Changes in Capital Structure - Narrative (Details) - shares
1 Months Ended 3 Months Ended
Apr. 30, 2020
Mar. 31, 2019
Dec. 31, 2019
Mar. 31, 2020
Capital Structure        
Common stock, shares authorized (in shares)     500,000,000 500,000,000
Long-term capital allocation, target allocation, cash generated allocated to growth investments, percentage     50.00%  
Long-term capital allocation, target allocation, cash generated allocated returned to shareholders, percentage     50.00%  
Employee Stock Purchase Plan, minimum percentage of eligible compensation to purchase shares   1.00%    
Employee Stock Purchase Plan, maximum percentage of eligible compensation   10.00%    
Employee Stock Purchase Plan, exercise price as percentage of fair value   95.00%    
Subsequent Event        
Capital Structure        
Shares issued to employee accounts (in shares) 63,455