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Shareholders' Equity (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended
Sep. 04, 2019
Aug. 03, 2019
Retained Earnings Adjustments [Line Items]    
Remaining share repurchase capacity   $ 707
Subsequent Event [Member]    
Retained Earnings Adjustments [Line Items]    
Quarterly dividend declared and paid in subsequent quarter $ 0.37  
2018 Program [Member]    
Retained Earnings Adjustments [Line Items]    
Share repurchase authorization   $ 1,500