FAIR VALUE MEASUREMENTS (Tables)

3 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

Below are our assets and liabilities that are measured at fair value:

	As of March 31, 2024								As of December 31, 2023
($ in millions)	Carrying Value		Level 1		Level 2		Level 3		Carrying Value		Level 1		Level 2		Level 3
Recorded at fair value
Marketable securities
Equity securities	$	2.0	$	2.0	$	—	$	—	$	—	$	—	$	—	$	—
U.S. Treasury	$	19.8	$	19.8	$	—	$	—	$	—	$	—	$	—	$	—
Corporate debt	28.1		—		28.1		—		—		—		—		—
Total debt securities	$	47.9	$	19.8	$	28.1	$	—	$	—	$	—	$	—	$	—
Derivatives
Derivative assets	$	11.0	$	—	$	11.0	$	—	$	12.3	$	—	$	12.3	$	—
Derivative liabilities	11.0		—		11.0		—		12.3		—		12.3		—
Recorded at historical value
Fixed rate debt 1
4.625% Senior notes due 2027	$	400.0	$	383.0	$	—	$	—	$	400.0	$	380.0	$	—	$	—
4.375% Senior notes due 2031	550.0		490.9		—		—		550.0		492.3		—		—
3.875% Senior notes due 2029	800.0		720.0		—		—		800.0		716.0		—		—
Non-recourse notes payable	1,831.5		—		1,828.3		—		1,705.6		—		1,705.1		—
Real estate mortgages and other debt	723.4		—		744.6		—		603.5		—		644.5		—

1Excluding unamortized debt issuance costs