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Shareholders' Equity - Narrative (Details) - USD ($)
1 Months Ended
Mar. 31, 2017
Jun. 30, 2019
Stockholders' Equity Note [Abstract]    
Authorized amount in buyback program $ 250,000,000.0  
Shares authorized to be repurchased (in shares) 17,300,000  
Period to complete share repurchase program 3 years  
Remaining number of shares authorized to be repurchased (in shares)   172,400,000