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Other Non-Current Liabilities
 9 Months Ended
Sep. 30, 2023
Other Liabilities Disclosure [Abstract]  
Other Non-Current Liabilities
16. Other Non-Current Liabilities
Other non-current liabilities consist of the following:
(in millions)September 30,
2023		December 31,
2022
Lessee non-current lease liabilities$43.0 $53.4 
Deferred revenue, non-current26.2 25.0 
Unrecognized tax benefits23.3 18.0 
Indirect tax payable, non-current8.1 8.2 
Defined benefit obligation7.7 10.1 
Income tax payable, non-current7.1 12.7 
Other3.9 9.1 
     Total other non-current liabilities$119.3 $136.5 
Unrecognized tax benefits relate to the Company’s long-term portion of tax liability associated with uncertain tax positions. Authoritative guidance prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of tax positions taken or expected to be taken in a tax return. See Note 23, “Income Taxes”, for further details.