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Equity and Accumulated Other Comprehensive Earnings - Share repurchase program (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
1 Months Ended 5 Months Ended
May 31, 2019
Sep. 30, 2019
Jan. 23, 2019
Share Repurchase Program      
Stock repurchase agreement, value $ 250    
Shares received   3.8  
Average price paid per share   $ 65.93  
Maximum      
Share Repurchase Program      
Number of shares authorized for repurchase     50.0