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Financing Arrangements (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Nov. 30, 2021
Nov. 30, 2020
Nov. 30, 2019
Apr. 30, 2020
Debt Instrument [Line Items]        
Stated Note interest rate       2.50%
Net proceeds from issuance of notes $ 1,001.5 $ 527.0 $ 0.0  
Repayments of Commercial Paper $ 1,443.0      
Debt instrument, term 5 years      
Credit facility $ 1,500.0      
Guarantees outstanding 0.6      
Letter Of Credit [Member]        
Debt Instrument [Line Items]        
Total unused capacity 13.6      
Outstanding letters of credit $ 63.7 32.2    
Revolving Credit Facility [Member] | Credit Facility Expiring August 2022 [Member]        
Debt Instrument [Line Items]        
Debt instrument, term 5 years      
Credit facility $ 1,000.0      
Basis spread on variable rate 1.25%      
Revolving Credit Facility [Member] | Credit Facility Expiring December 2021 [Member]        
Debt Instrument [Line Items]        
Debt instrument, term 364 days      
Credit facility $ 1,000.0      
Basis spread on variable rate 1.25%      
Revolving Credit Facility [Member] | Credit Facility Expiring June 2026        
Debt Instrument [Line Items]        
Debt instrument, term 5 years      
Credit facility $ 1,500.0      
Basis spread on variable rate 1.25%      
Revolving Credit Facility [Member] | Maximum [Member] | Credit Facility Expiring December 2021 [Member]        
Debt Instrument [Line Items]        
Basis spread on variable rate 1.75%      
Revolving Credit Facility [Member] | Maximum [Member] | Credit Facility Expiring June 2026        
Debt Instrument [Line Items]        
Basis spread on variable rate 1.75%      
0.90% Notes due February 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 February 2031        
Debt Instrument [Line Items]        
Notes payable $ 500.0      
Stated Note interest rate 1.85%      
Net proceeds from issuance of notes $ 492.8      
2.5% Notes due April 2030        
Debt Instrument [Line Items]        
Notes payable       $ 500.0
Net proceeds from issuance of notes 495.0      
Line of Credit        
Debt Instrument [Line Items]        
Credit facility 969.2      
Maximum borrowing capacity 308.4      
Total unused capacity 226.6      
Committed credit facilities, fee $ 2.0 $ 1.3 $ 1.3  
Twenty Seventeen Term Loan One        
Debt Instrument [Line Items]        
Debt instrument, term 3 years      
Basis spread on variable rate 1.125%      
Twenty Seventeen Term Loan Two [Member]        
Debt Instrument [Line Items]        
Notes payable $ 750.0      
Debt instrument, term 5 years      
Basis spread on variable rate 1.25%      
Quarterly installment payments, percentage 2.50%