Note 10 - Debt (Details Textual) - USD ($) $ in Millions		1 Months Ended
	Oct. 28, 2022	Oct. 31, 2022	Sep. 30, 2022	Mar. 11, 2022	Dec. 31, 2021
Letters of Credit Outstanding, Amount			$ 4.8		$ 5.1
Bilateral Term Loan Agreement [Member]
Debt Instrument, Face Amount				$ 125.0
Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity			1,000.0
Line of Credit Facility, Remaining Borrowing Capacity			55.2		384.9
Revolving Credit Facility [Member] | Subsequent Event [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 200.0	$ 420.2
Repayments of Debt	3,300.0	90.0
Line of Credit Facility, Increase in Maximum Borrowing Capacity	$ 3,100.0	$ 275.0
Senior Notes [Member]
Long-Term Debt, Gross			$ 2,350.0		$ 2,350.0