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FAIR VALUE MEASUREMENT - Fair values of debt obligations (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Mar. 16, 2022	Dec. 15, 2020	Jan. 12, 2017
Debt
Debt obligations	$ 1,311.5	$ 1,573.9
Level 2
Debt
Debt obligations	1,311.5	1,573.9
Term Loan Agreement | Level 2
Debt
Debt obligations	$ 71.8	$ 306.3
3.650% Senior Notes due January 2027
Debt
Interest rate (as a percent)	3.65%	3.65%			3.65%
3.650% Senior Notes due January 2027 | Level 2
Debt
Debt obligations	$ 615.3	$ 623.6
1.625% Senior Notes due December 2030
Debt
Interest rate (as a percent)	1.625%	1.625%		1.625%
1.625% Senior Notes due December 2030 | Level 2
Debt
Debt obligations	$ 380.3	$ 390.7
3.000% Senior Notes due March 2032
Debt
Interest rate (as a percent)	3.00%	3.00%	3.00%
3.000% Senior Notes due March 2032 | Level 2
Debt
Debt obligations	$ 244.1	$ 253.3

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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