DEBT -Schedule of Long-Term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Finance lease liability	$ 8.3	$ 8.4
Total debt outstanding	3,403.7	3,230.1
Less—debt issuance costs	(22.5)	(25.9)
Long-term debt, including current portion	3,382.8	3,206.2
Less—current portion, net of current portion of debt issuance costs	(83.4)	(84.9)
LONG-TERM DEBT	3,299.5	3,121.2
2021 Real Estate Facility \| Bank of America, N.A.
Debt Instrument [Line Items]
Long-term debt, gross	588.6	614.4
2021 BofA Real Estate Facility \| Wells Fargo Bank, National Association
Debt Instrument [Line Items]
Long-term debt, gross	160.4	165.9
2018 Bank of America Facility \| Bank of America, N.A.
Debt Instrument [Line Items]
Long-term debt, gross	38.8	50.3
2018 Wells Fargo Master Loan Facility \| Wells Fargo Bank, National Association
Debt Instrument [Line Items]
Long-term debt, gross	63.4	72.0
2015 Wells Fargo Master Loan Facility \| Wells Fargo Bank, National Association
Debt Instrument [Line Items]
Long-term debt, gross	33.3	37.2
2023 Syndicated Revolving Credit Facility \| Bank of America, N.A.
Debt Instrument [Line Items]
Long-term debt, gross	$ 230.7	0.0
Senior Notes \| 4.50% Senior Notes due 2028
Debt Instrument [Line Items]
Stated interest rate of debt instrument	4.50%
Long-term debt, gross	$ 405.0	405.0
Add—unamortized premium	$ 0.5	0.6
Senior Notes \| 4.625% Senior Notes due 2029
Debt Instrument [Line Items]
Stated interest rate of debt instrument	4.625%
Long-term debt, gross	$ 800.0	800.0
Senior Notes \| 4.75% Senior Notes due 2030
Debt Instrument [Line Items]
Stated interest rate of debt instrument	4.75%
Long-term debt, gross	$ 445.0	445.0
Add—unamortized premium	$ 1.1	1.3
Senior Notes \| 5.00% Senior Notes due 2032
Debt Instrument [Line Items]
Stated interest rate of debt instrument	5.00%
Long-term debt, gross	$ 600.0	600.0
Mortgage notes payable bearing interest at fixed rates
Debt Instrument [Line Items]
Stated interest rate of debt instrument	5.80%
Long-term debt, gross	$ 30.1	$ 31.9

Long Term Debt and Lease Obligations, Including Unamortized Premium (Discount)

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount, after accumulated amortization, of debt premium.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Present value of lessee's discounted obligation for lease payments from finance lease.

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Amount of long-term debt and lease obligation, classified as noncurrent.

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Amount of long-term debt and lease obligation, including portion classified as current.

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