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FAIR VALUE MEASUREMENTS - Schedule of Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity securities $ 2.1  
Total debt securities $ 49.3  
Senior Notes | 4.625% Senior notes due 2027    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt stated interest rate (as a percent) 4.625%  
Senior Notes | 4.375% Senior notes due 2031    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt stated interest rate (as a percent) 4.375%  
Senior Notes | 3.875% Senior notes due 2029    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt stated interest rate (as a percent) 3.875%  
U.S. Treasury    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total debt securities $ 19.9  
Corporate debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total debt securities 19.8  
Carrying Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity securities 2.1 $ 0.0
Total debt securities 49.3 0.0
Equity Method Investment 100.0 0.0
Derivative assets 8.9 12.3
Derivative liabilities 8.9 12.3
Carrying Value | Senior Notes | 4.625% Senior notes due 2027    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt 400.0 400.0
Carrying Value | Senior Notes | 4.375% Senior notes due 2031    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt 550.0 550.0
Carrying Value | Senior Notes | 3.875% Senior notes due 2029    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt 800.0 800.0
Carrying Value | Non-recourse notes payable | Non-recourse    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt 2,025.8 1,705.6
Carrying Value | Real estate mortgages and other debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt 721.3 603.5
Carrying Value | U.S. Treasury    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total debt securities 19.9 0.0
Carrying Value | Municipal debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total debt securities 9.6 0.0
Carrying Value | Corporate debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total debt securities 19.8 0.0
Estimate of Fair Value Measurement | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity securities 2.1 0.0
Total debt securities 19.9 0.0
Equity Method Investment 100.0 0.0
Derivative assets 0.0 0.0
Derivative liabilities 0.0 0.0
Estimate of Fair Value Measurement | Level 1 | Senior Notes | 4.625% Senior notes due 2027    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt 379.5 380.0
Estimate of Fair Value Measurement | Level 1 | Senior Notes | 4.375% Senior notes due 2031    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt 489.5 492.3
Estimate of Fair Value Measurement | Level 1 | Senior Notes | 3.875% Senior notes due 2029    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt 718.0 716.0
Estimate of Fair Value Measurement | Level 1 | Non-recourse notes payable | Non-recourse    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt 0.0 0.0
Estimate of Fair Value Measurement | Level 1 | Real estate mortgages and other debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt 0.0 0.0
Estimate of Fair Value Measurement | Level 1 | U.S. Treasury    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total debt securities 19.9 0.0
Estimate of Fair Value Measurement | Level 1 | Municipal debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total debt securities 0.0 0.0
Estimate of Fair Value Measurement | Level 1 | Corporate debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total debt securities 0.0 0.0
Estimate of Fair Value Measurement | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity securities 0.0 0.0
Total debt securities 29.4 0.0
Equity Method Investment 0.0 0.0
Derivative assets 8.9 12.3
Derivative liabilities 8.9 12.3
Estimate of Fair Value Measurement | Level 2 | Senior Notes | 4.625% Senior notes due 2027    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt 0.0 0.0
Estimate of Fair Value Measurement | Level 2 | Senior Notes | 4.375% Senior notes due 2031    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt 0.0 0.0
Estimate of Fair Value Measurement | Level 2 | Senior Notes | 3.875% Senior notes due 2029    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt 0.0 0.0
Estimate of Fair Value Measurement | Level 2 | Non-recourse notes payable | Non-recourse    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt 2,023.8 1,705.1
Estimate of Fair Value Measurement | Level 2 | Real estate mortgages and other debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt 725.4 644.5
Estimate of Fair Value Measurement | Level 2 | U.S. Treasury    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total debt securities 0.0 0.0
Estimate of Fair Value Measurement | Level 2 | Municipal debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total debt securities 9.6 0.0
Estimate of Fair Value Measurement | Level 2 | Corporate debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total debt securities 19.8 0.0
Estimate of Fair Value Measurement | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity securities 0.0 0.0
Total debt securities 0.0 0.0
Equity Method Investment 0.0 0.0
Derivative assets 0.0 0.0
Derivative liabilities 0.0 0.0
Estimate of Fair Value Measurement | Level 3 | Senior Notes | 4.625% Senior notes due 2027    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt 0.0 0.0
Estimate of Fair Value Measurement | Level 3 | Senior Notes | 4.375% Senior notes due 2031    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt 0.0 0.0
Estimate of Fair Value Measurement | Level 3 | Senior Notes | 3.875% Senior notes due 2029    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt 0.0 0.0
Estimate of Fair Value Measurement | Level 3 | Non-recourse notes payable | Non-recourse    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt 0.0 0.0
Estimate of Fair Value Measurement | Level 3 | Real estate mortgages and other debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt 0.0 0.0
Estimate of Fair Value Measurement | Level 3 | U.S. Treasury    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total debt securities 0.0 0.0
Estimate of Fair Value Measurement | Level 3 | Municipal debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total debt securities 0.0 0.0
Estimate of Fair Value Measurement | Level 3 | Corporate debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total debt securities $ 0.0 $ 0.0