CAPITAL STOCK - Summary of Treasury Stock Activity (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024		Dec. 31, 2023		Dec. 31, 2022
Treasury Stock, Number of Shares and Restriction Disclosures [Abstract]
Beginning Balance		6,000,000		5,680,000		5,350,000
Restricted stock withholdings	[1]	280,000		220,000		260,000
Restricted stock forfeitures		100,000	[2]	100,000	[3]	70,000.00	[3]
Ending Balance		6,380,000		6,000,000		5,680,000
Beginning Balance, Cost		$ 98.3		$ 95.4		$ 91.1
Restricted stock withholdings	[1]	4.9		2.9		4.3
Restricted stock forfeitures		0.0	[2]	0.0	[3]	0.0	[3]
Ending Balance, Cost		$ 103.2		$ 98.3		$ 95.4

[1] Holdings withheld shares as a result of the election by certain employees to satisfy their tax liabilities upon vesting in restricted stock and restricted stock units. Holdings determined the number of shares to be withheld based upon market values of the common stock of Holdings on the vest dates. Below is a summary of the range of market values per share on the vest dates for the years indicated:     Year Ended December 31,     2022   2023   2024 Market Values   $12.11 to $18.33   $11.16 to $18.36   $13.93 to $31.57

[2] Holdings repurchased forfeited restricted shares in 2024 at a cost of $0.001 per share in 2024 in accordance with the 2024 Long-Term Incentive Plan.

[3] Holdings repurchased forfeited restricted shares in 2022 and 2023 at a cost of $0.001 per share in 2022 and 2023 in accordance with the 2017 Omnibus Plan.