DEBT - Schedule of Long-Term Debt (Detail) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Obligations under finance leases (Note 6)	$ 16.3	$ 18.2
Total debt	1,305.2	1,517.4
Less: current portion of total debt	19.6	22.3
Less: unamortized debt issuance costs	7.8	11.1
Long-term portion of total debt	1,277.8	1,484.0
Line of credit \| $1.2 billion Credit Facility, due in 2026 \| Credit agreement amended, due in 2026
Debt Instrument [Line Items]
Long-term debt	31.0	154.1
Line of credit \| $125 million term loan, due in 2026 \| Credit agreement amended, due in 2026
Debt Instrument [Line Items]
Long-term debt	125.0	200.0
Senior notes \| $600 million Senior Notes, due in 2024
Debt Instrument [Line Items]
Long-term debt	600.0	600.0
Senior notes \| $500 million Senior Notes, due in 2029
Debt Instrument [Line Items]
Long-term debt	500.0	500.0
Promissory notes and deferred consideration \| Promissory notes and deferred consideration (fixed rate)
Debt Instrument [Line Items]
Long-term debt	32.9	44.7
Foreign bank debt \| Foreign bank debt (fixed rate)
Debt Instrument [Line Items]
Long-term debt	$ 0.0	$ 0.4

Long-term Debt, Gross And Lease Obligation

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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