Note 19 - Segment Reporting - Revenue and EBITDA by Reportable Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Revenues	$ 2,497.0		$ 2,462.5		$ 2,269.4
Cost of revenues (exclusive of items shown separately below)	(824.6)		(853.7)		(791.7)
Selling, general and administrative	(381.5)		(313.2)		(308.2)
Other operating (loss) income	354.2		(134.0)		19.4
Investment (loss) income and others, net	(5.3)		2.1		0.4
EBITDA from discontinued operations	117.9		(222.3)		(204.5)
EBITDA	1,521.9		1,386.0		1,393.8
Depreciation and amortization of fixed assets	(164.2)		(170.3)		(159.2)
Amortization of intangible assets	(74.4)	$ (74.4)	(79.9)	$ (80.0)	(73.4)	$ (73.4)
Interest expense	(138.8)		(127.0)		(138.3)
Income before income taxes	1,262.4		786.5		818.4
Insurance [Member]
Revenues	2,437.0		2,206.9		2,008.7
Cost of revenues (exclusive of items shown separately below)	(781.9)		(704.4)		(644.3)
Selling, general and administrative	(347.4)		(239.1)		(248.1)
Other operating (loss) income	0.0		0.0		15.9
Investment (loss) income and others, net	(4.7)		1.8		0.3
EBITDA from discontinued operations	(0.0)		(0.0)		(0.0)
EBITDA	1,303.0		1,265.2		1,132.5
Energy and Specialized Markets [Member]
Revenues	22.4		112.8		104.0
Cost of revenues (exclusive of items shown separately below)	(19.1)		(58.9)		(54.6)
Selling, general and administrative	(26.7)		(44.9)		(40.5)
Other operating (loss) income	450.0		0.0		0.0
Investment (loss) income and others, net	(0.4)		0.6		0.0
EBITDA from discontinued operations	117.9		(222.3)		(204.5)
EBITDA	308.3		231.9		213.4
Financial Services [Member]
Revenues	37.6		142.8		156.7
Cost of revenues (exclusive of items shown separately below)	(23.6)		(90.4)		(92.8)
Selling, general and administrative	(7.4)		(29.2)		(19.6)
Other operating (loss) income	(95.8)		(134.0)		3.5
Investment (loss) income and others, net	(0.2)		(0.3)		0.1
EBITDA from discontinued operations	(0.0)		(0.0)		(0.0)
EBITDA	$ (89.4)		$ (111.1)		$ 47.9