XML 85 R73.htm IDEA: XBRL DOCUMENT v3.20.2
Stock Repurchase Program - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended 3 Months Ended 4 Months Ended 9 Months Ended
May 31, 2020
Feb. 29, 2020
Dec. 31, 2019
Aug. 31, 2019
May 31, 2019
Jul. 31, 2020
Feb. 29, 2020
Jul. 31, 2019
 [1]
May 31, 2020
Jul. 31, 2020
Jul. 31, 2019
 [1],[3]
Jun. 19, 2020
Accelerated Share Repurchases [Line Items]                        
Stock repurchase program authorized amount           $ 500.0       $ 500.0   $ 500.0
Remaining amount available for further repurchases           $ 500.0       $ 500.0    
Purchases of treasury stock (in shares)           149,000   775,000   1,380,000 [2] 1,901,000  
December 2019, ASR                        
Accelerated Share Repurchases [Line Items]                        
Stock repurchase program authorized amount     $ 100.0                  
Prepayment to repurchase stock     100.0                  
Initial share delivery     $ 80.0                  
Stock repurchase program, prepayment during prior period, derivative settlement   $ 20.0                    
Purchases of treasury stock (in shares)             700,000          
Purchases of treasury stock             $ 149.75          
February 2020, ASR                        
Accelerated Share Repurchases [Line Items]                        
Stock repurchase program authorized amount   100.0         $ 100.0          
Prepayment to repurchase stock   100.0                    
Initial share delivery   $ 80.0         $ 80.0          
Stock repurchase program, prepayment during prior period, derivative settlement $ 20.0                      
Purchases of treasury stock (in shares) 148,953               700,000      
Purchases of treasury stock                 $ 140.41      
June 2019, ASR                        
Accelerated Share Repurchases [Line Items]                        
Stock repurchase program, prepayment during prior period, derivative settlement       $ 20.0                
Purchases of treasury stock (in shares)       90,202                
February 2019, ASR                        
Accelerated Share Repurchases [Line Items]                        
Stock repurchase program, prepayment during prior period, derivative settlement         $ 20.0              
Purchases of treasury stock (in shares)         97,601              
[1] Does not include the 90,202 shares or $20.0 million equity forward contract from the June 2019 ASR settled in August 2019.
[2] The third quarter of fiscal 2020 includes the settlement of the 148,953 shares or $20.0 million equity forward contract from the February 2020 ASR settled in May 2020.
[3] The third quarter of fiscal 2019 includes the settlement of the 97,601 shares or $20.0 million equity forward contract from the February 2019 ASR settled in May 2019.