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Financing Arrangements (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Feb. 28, 2021
Nov. 30, 2022
Nov. 30, 2021
Nov. 30, 2020
Debt Instrument [Line Items]        
Net proceeds from issuance of notes   $ 0.0 $ 1,001.5 $ 527.0
Repayments of Commercial Paper   1,443.0    
Letter Of Credit [Member]        
Debt Instrument [Line Items]        
Total unused capacity   13.6    
Outstanding letters of credit   $ 60.8 63.7  
0.90% Notes due Feb 2026        
Debt Instrument [Line Items]        
Notes payable $ 500.0      
Stated Note interest rate 0.90%      
Net proceeds from issuance of notes $ 495.7      
1.85% Notes due Feb 2031        
Debt Instrument [Line Items]        
Notes payable $ 500.0      
Stated Note interest rate 1.85%      
Net proceeds from issuance of notes $ 492.8      
Revolving Credit Facility [Member] | Credit Facility Expiring December 2021 [Member]        
Debt Instrument [Line Items]        
Debt instrument, term   364 days    
Credit facility   $ 500.0    
Revolving Credit Facility [Member] | Credit Facility Expiring June 2026        
Debt Instrument [Line Items]        
Debt instrument, term   5 years    
Credit facility   $ 1,500.0    
Revolving Credit Facility [Member] | Credit Facility Expiring June 2026 | London Interbank Offered Rate (LIBOR)        
Debt Instrument [Line Items]        
Basis spread on variable rate   1.25%    
Revolving Credit Facility [Member] | Maximum [Member] | Credit Facility Expiring June 2026 | London Interbank Offered Rate (LIBOR)        
Debt Instrument [Line Items]        
Basis spread on variable rate   1.75%    
Revolving Credit Facility [Member] | Maximum [Member] | Credit Facility Expiring June 2026 | Secured Overnight Financing Rate (SOFR), Addition        
Debt Instrument [Line Items]        
Basis spread on variable rate   1.60%    
Revolving Credit Facility [Member] | Minimum [Member] | Credit Facility Expiring June 2026 | Secured Overnight Financing Rate (SOFR), Addition        
Debt Instrument [Line Items]        
Basis spread on variable rate   1.23%    
Line of Credit        
Debt Instrument [Line Items]        
Credit facility   $ 775.4    
Maximum borrowing capacity   302.5    
Total unused capacity   232.6    
Committed credit facilities, fee   $ 2.1 $ 2.0 $ 1.3