v3.23.1
Debt (Details)
3 Months Ended
Jan. 06, 2022
Jan. 20, 2021
USD ($)
Apr. 30, 2023
USD ($)
Apr. 30, 2022
USD ($)
Jan. 31, 2023
USD ($)
Jan. 04, 2021
USD ($)
Apr. 30, 2019
USD ($)
A&R Credit Agreement              
Line of Credit Facility [Line Items]              
Minimum interest coverage ratio     3.00        
Maximum senior secured leverage ratio     3.00        
Maximum total leverage ratio     5.50        
Maximum total leverage ratio, stepped down     3.50        
A&R Credit Agreement | Minimum              
Line of Credit Facility [Line Items]              
Commitment fee 0.15%            
A&R Credit Agreement | Maximum              
Line of Credit Facility [Line Items]              
Commitment fee 0.25%            
3.00% Senior Notes | Senior Notes              
Line of Credit Facility [Line Items]              
Aggregate principal amount   $ 750,000,000          
Stated interest rate   3.00%          
Percentage of original principal amount   40.00%          
Proceeds from issuance of senior notes, net of debt financing costs   $ 738,000,000          
Payment for underwriting commissions   9,400,000          
Payments of financing costs   $ 2,600,000          
Interest expense, amortization of debt issuance costs and accretion of debt discount     $ 6,000,000 $ 6,000,000      
Debt instrument, fair value     653,500,000   $ 645,400,000    
3.00% Senior Notes | Senior Notes | Debt Instrument, Redemption, Period Two              
Line of Credit Facility [Line Items]              
Redemption percentage   101.50%          
3.00% Senior Notes | Senior Notes | Debt Instrument, Redemption, Period Three              
Line of Credit Facility [Line Items]              
Redemption percentage   100.75%          
3.00% Senior Notes | Senior Notes | Debt Instrument, Redemption, Period Four              
Line of Credit Facility [Line Items]              
Redemption percentage   100.00%          
3.00% Senior Notes | Senior Notes | Debt Instrument, Redemption, Period Five              
Line of Credit Facility [Line Items]              
Redemption percentage   101.00%          
3.00% Senior Notes | Senior Notes | Plus "Make Whole" Premium | Debt Instrument, Redemption, Period One              
Line of Credit Facility [Line Items]              
Redemption percentage   100.00%          
3.00% Senior Notes | Senior Notes | Proceeds From Equity Offering, Provided Principal Amount of Redemptions Does Not Exceed 40% | Debt Instrument, Redemption, Period One              
Line of Credit Facility [Line Items]              
Redemption percentage   103.00%          
Revolving Line of Credit              
Line of Credit Facility [Line Items]              
Maximum borrowing capacity             $ 150,000,000
Unused standby letter of credit     $ 0   $ 0    
Revolving Line of Credit | A&R Credit Agreement              
Line of Credit Facility [Line Items]              
Maximum borrowing capacity           $ 750,000,000  
Incremental borrowing facility           250,000,000  
Letter of Credit              
Line of Credit Facility [Line Items]              
Maximum borrowing capacity             10,000,000
Letter of Credit | A&R Credit Agreement              
Line of Credit Facility [Line Items]              
Maximum borrowing capacity           100,000,000  
Swingline              
Line of Credit Facility [Line Items]              
Maximum borrowing capacity             $ 10,000,000
Swingline | A&R Credit Agreement              
Line of Credit Facility [Line Items]              
Maximum borrowing capacity           $ 50,000,000  
ABR Loans | A&R Credit Agreement | Federal Funds Rate              
Line of Credit Facility [Line Items]              
Margin 0.50%            
ABR Loans | A&R Credit Agreement | Eurodollar Rate              
Line of Credit Facility [Line Items]              
Margin 1.00%            
ABR Loans | A&R Credit Agreement | Eurodollar Rate | Minimum              
Line of Credit Facility [Line Items]              
Margin (0.25%)            
ABR Loans | A&R Credit Agreement | Eurodollar Rate | Maximum              
Line of Credit Facility [Line Items]              
Margin 0.25%