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Derivative Instruments - Effect of Cash Flow Hedges on Income Statement (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2023
Oct. 31, 2022
Oct. 31, 2023
Oct. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items]        
Revenues $ 1,865,675 $ 1,599,103 $ 5,336,753 $ 4,569,558
Costs and expenses 1,777,820 1,625,424 5,232,441 4,702,800
Provision for (benefit from) income taxes 15,534 52,563 25,459 59,021
Gains (losses) related to cash flow hedges, Income Taxes 0 (3,220) 0 (3,220)
Revenues        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) related to cash flow hedges 15,625 5,647 49,217 5,985
Costs and expenses        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) related to cash flow hedges $ 839 $ (11,852) $ 1,781 $ (18,636)