XML 95 R73.htm IDEA: XBRL DOCUMENT v3.22.4
Credit and Other Debt Agreements - Credit Agreement - Additional Information (Detail)
$ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2022
AUD ($)
Dec. 31, 2022
NZD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2022
AUD ($)
Dec. 31, 2022
NZD ($)
Dec. 31, 2021
USD ($)
Debt Instrument [Line Items]            
Liabilities     $ 29,717.6     $ 24,784.9
Long-term debt     16.8      
Revolving Credit Facility [Member]            
Debt Instrument [Line Items]            
Line of credit facility, amount outstanding     241.9      
Interest rate for facility The interest rates on Facility B are Interbank rates, which vary by tranche, duration and currency, plus a margin of 1.500% and 1.850% for the AU$ and NZ$ tranches, respectively. The interest rates on Facilities C and D are 30 day Interbank rates, plus a margin of 0.830% and 0.990% for the AU$ and NZ$ tranches, respectively. The annual fee for Facility B is 0.675% and 0.8325% for the undrawn commitments for the AU$ and NZ$ tranches, respectively. The annual fee for Facility C is 0.77% and for Facility D is 0.90% of the total commitments of the facilities The interest rates on Facility B are Interbank rates, which vary by tranche, duration and currency, plus a margin of 1.500% and 1.850% for the AU$ and NZ$ tranches, respectively. The interest rates on Facilities C and D are 30 day Interbank rates, plus a margin of 0.830% and 0.990% for the AU$ and NZ$ tranches, respectively. The annual fee for Facility B is 0.675% and 0.8325% for the undrawn commitments for the AU$ and NZ$ tranches, respectively. The annual fee for Facility C is 0.77% and for Facility D is 0.90% of the total commitments of the facilities        
Debt instrument fair value amount     241.9      
Revolving Credit Facility [Member] | Before Amendment [Member]            
Debt Instrument [Line Items]            
Line of credit facility, maximum borrowing capacity       $ 340,000,000.0    
Revolving Credit Facility [Member] | After Amendment [Member]            
Debt Instrument [Line Items]            
Line of credit facility, maximum borrowing capacity       410,000,000.0    
Credit Facility Two [Member] | Revolving Credit Facility [Member]            
Debt Instrument [Line Items]            
Line of credit facility, amount outstanding       325,000,000.0 $ 0.0  
Line of credit facility, remaining borrowing capacity       25,000,000.0 25.0  
Net borrowings on premium financing debt facility $ 350,000,000.0 $ 25.0        
Credit Facility Three [Member] | Revolving Credit Facility [Member]            
Debt Instrument [Line Items]            
Line of credit facility, amount outstanding       22,500,000    
Net borrowings on premium financing debt facility $ 60,000,000.0 $ 10.0        
Annual fee percentage 0.77% 0.77%        
Credit Facility Four [Member] | Revolving Credit Facility [Member]            
Debt Instrument [Line Items]            
Line of credit facility, amount outstanding         14.5  
Line of credit facility, remaining borrowing capacity       $ 37,500,000 $ 0.5  
Net borrowings on premium financing debt facility   $ 15.0        
Annual fee percentage 0.90% 0.90%        
AUD Denominated Tranche [Member] | Revolving Credit Facility [Member] | Facility B [Member]            
Debt Instrument [Line Items]            
Additional margin percentage on interest rate 1.50% 1.50%        
Annual fee percentage 0.675% 0.675%        
AUD Denominated Tranche [Member] | Revolving Credit Facility [Member] | Facility C and D [Member]            
Debt Instrument [Line Items]            
Additional margin percentage on interest rate 0.83% 0.83%        
NZD Denominated Tranche [Member] | Revolving Credit Facility [Member] | Facility B [Member]            
Debt Instrument [Line Items]            
Additional margin percentage on interest rate 1.85% 1.85%        
Annual fee percentage 0.8325% 0.8325%        
NZD Denominated Tranche [Member] | Revolving Credit Facility [Member] | Facility C and D [Member]            
Debt Instrument [Line Items]            
Additional margin percentage on interest rate 0.99% 0.99%        
Note Purchase Agreements [Member] | Level 3 [Member]            
Debt Instrument [Line Items]            
Line of credit facility, fair value of amount outstanding     4,942.5      
Long-term debt     5,848.0      
Unsecured Multicurrency Credit Agreement [Member]            
Debt Instrument [Line Items]            
Estimated fair value of outstanding borrowings     60.0      
Unsecured Multicurrency Credit Agreement [Member] | Minimum [Member]            
Debt Instrument [Line Items]            
Interest rates on base rate loans 0.00% 0.00%        
Fixed rate over SOFR rate, eurocurrency rate or RFR rate 0.825% 0.825%        
Annual facility fee of revolving credit facility 0.125% 0.125%        
Unsecured Multicurrency Credit Agreement [Member] | Maximum [Member]            
Debt Instrument [Line Items]            
Interest rates on base rate loans 0.40% 0.40%        
Fixed rate over SOFR rate, eurocurrency rate or RFR rate 1.40% 1.40%        
Annual facility fee of revolving credit facility 0.25% 0.25%        
Unsecured Multicurrency Credit Agreement [Member] | Standby Letters of Credit [Member]            
Debt Instrument [Line Items]            
Line of credit facility, maximum borrowing capacity     1,150.6      
Line of credit facility, amount outstanding     10.6      
Liabilities     17.4      
Line of credit facility, fair value of amount outstanding     $ 60.0