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FAIR VALUE MEASUREMENT - Fair values of debt obligations (Details) - USD ($) $ in Millions	Mar. 31, 2022	Mar. 16, 2022	Dec. 31, 2021	Dec. 15, 2020	Jan. 12, 2017
Debt
Debt obligations	$ 1,593.6		$ 1,299.3
Level 2
Debt
Debt obligations	1,593.6		1,299.3
Term Loan Agreement | Level 2
Debt
Debt obligations	$ 155.0		$ 160.1
3.650% Senior Notes due January 2027
Debt
Interest rate (as a percent)	3.65%	3.65%	3.65%		3.65%
3.650% Senior Notes due January 2027 | Level 2
Debt
Debt obligations	$ 661.7		$ 702.6
1.625% Senior Notes due December 2030
Debt
Interest rate (as a percent)	1.625%	1.625%	1.625%	1.625%
1.625% Senior Notes due December 2030 | Level 2
Debt
Debt obligations	$ 430.4		$ 470.9
3.000% Senior Notes due March 2032
Debt
Interest rate (as a percent)	3.00%	3.00%
3.000% Senior Notes due March 2032 | Level 2
Debt
Debt obligations	$ 300.0

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- Definition

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

+ References

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- Definition

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

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