XML 158 R129.htm IDEA: XBRL DOCUMENT v3.19.3
Stock Incentive Plans - Stock Appreciation Rights (Parenthetical) (Details) - Stock Appreciation Rights (SARs) [Member]
12 Months Ended
Sep. 30, 2019
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Weighted-average remaining contractual life of outstanding SARs and stock options (in years) 6 years 2 months 12 days
Weighted-average remaining contractual life of outstanding, exercisable SARs and stock options (in years) 5 years 4 months 24 days
Exercise Price Range 1 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise price per share range, minimum (in usd per share) $ 20.02
Exercise price per share range, maximum (in usd per share) $ 29.5
Exercise price per share range, number of exercisable SARs and options | shares 172,000
Exercise Price Range 2 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise price per share range, minimum (in usd per share) $ 37.37
Exercise price per share range, maximum (in usd per share) $ 47.63
Exercise price per share range, number of exercisable SARs and options | shares 350,000
Exercise Price Range 3 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise price per share range, minimum (in usd per share) $ 57.96
Exercise price per share range, maximum (in usd per share) $ 59.95
Exercise price per share range, number of exercisable SARs and options | shares 871,000
Exercise Price Range 4 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise price per share range, minimum (in usd per share) $ 62.33
Exercise price per share range, maximum (in usd per share) $ 82.34
Exercise price per share range, number of exercisable SARs and options | shares 709,000