INCOME TAXES - SUMMARY (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current:
Federal	$ 86.8	$ 44.0	$ 171.5
State	12.4	9.2	18.3
Foreign	3.5	3.0	1.3
Total	102.7	56.2	191.1
Deferred:
Federal	17.9	18.2	71.1
State	2.8		24.3
Foreign	(0.4)	1.5	1.9
Total deferred tax expense	20.3	19.7	97.3
Total income taxes	$ 123.0	$ 75.9	$ 288.4
Difference of Income tax expense from amounts computed by applying the statutory federal rate to income from continuing operations before income taxes
U.S. federal income tax rate (as a percent)	21.00%	21.00%	21.00%
State and local taxes, net of federal benefit (as a percent)	2.30%	2.60%	2.80%
Foreign-derived intangible income (FDII) (as a percent)	(2.60%)	(2.00%)	(2.40%)
Foreign taxes (as a percent)	0.30%	0.40%	0.10%
Share-based payments (as a percent)	0.20%	0.50%
Return to provision true-ups (as a percent)	(0.70%)	(2.80%)	0.10%
Other-net (as a percent)		0.60%	(0.30%)
Effective income tax rate , Percent, Total	20.50%	20.30%	21.30%
Valuation allowance	$ 5.0	$ 5.3
Deferred tax assets:
Operating lease liabilities	84.0	77.4
Multi-employer withdrawal liabilities	11.4	12.8
Deferred compensation	12.1	11.8
U.S. State alternative minimum tax credits	5.9	7.4
Insurance reserves	7.8	6.3
Other	15.8	12.9
Total deferred tax assets	137.0	128.6
Valuation allowance	(5.0)	(5.3)
Total Deferred tax assets, net of valuation allowance	132.0	123.3
Deferred tax liabilities:
Basis differences for property and equipment	482.7	451.4
Operating lease right of use assets	83.8	75.8
Intangibles	40.3	42.3
Capital Construction Fund	192.1	206.9
Other	26.5	16.2
Total deferred tax liabilities	825.4	792.6
Deferred tax liability, net , Total	$ 693.4	$ 669.3