INCOME TAXES - Summary of Reconciliation Between Income Tax Expenses (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Taxes [Line Items]
Computed statutory tax expense	$ 53.1	$ 46.5	$ (55.7)
State and local income taxes, net of federal income tax impact	7.7	5.4	(2.2)
Changes in valuation allowance	(136.7)	(63.9)	60.6
Foreign tax rate differential	0.0	1.4	1.3
Foreign tax credits	(4.9)	(13.0)	(4.0)
Inflation adjustments	(6.1)	(0.3)	(1.1)
Nondeductible compensation	3.9	2.9	1.4
Changes in uncertain tax positions	3.1	(0.9)	1.6
U.S. tax impact of foreign operations	9.6	10.3	(1.6)
Return to provision	1.4	(3.3)	1.4
Expiration of attribute carryforwards	3.1	37.1	0.0
Permanent differences	7.4	6.8	4.4
Other, net	(1.7)	0.9	(3.1)
Income taxes	(60.1)	29.9	3.0
CUSA
Income Taxes [Line Items]
Computed statutory tax expense	56.3	49.8	(50.8)
State and local income taxes, net of federal income tax impact	8.1	5.9	(4.2)
Changes in valuation allowance	(134.8)	(68.6)	41.8
Foreign tax rate differential	0.0	1.4	1.3
Foreign tax credits	(5.9)	(12.9)	(4.0)
Inflation adjustments	(6.1)	(0.3)	(1.1)
Nondeductible compensation	3.9	2.8	1.4
Changes in uncertain tax positions	3.2	(0.9)	1.6
U.S. tax impact of foreign operations	9.4	10.4	(1.6)
Return to provision	1.1	(3.3)	1.2
Expiration of attribute carryforwards	3.2	36.4	0.0
Permanent differences	7.4	6.9	4.4
Other, net	(1.6)	0.8	(3.1)
Income taxes	$ (55.8)	$ 28.4	$ (13.1)