Note 13 - Notes Payable (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Schedule of Debt [Table Text Block]

Date Issued	Amount Issued		Interest Rate		Maturity Date
Aug-22	$	650.0		4.600%	Feb-33
Feb-22	$	600.0		3.200%	Apr-32
Sept-21	$	500.0		2.25%	Dec-31

Date Paid	Amount Repaid		Interest Rate		Maturity Date
Sep-22 (1)	$	299.7		3.500%	Apr-23
Sep-22 (1) (2)	$	350.0		3.125%	Jun-23
Sep-22 (1) (2)	$	299.4		3.375%	Oct-22
Mar-22 (3)	$	500.0		3.400%	Nov-22

Notes Payable [Member]

Notes Tables

Schedule of Debt [Table Text Block]

	Carrying Amount at December 31,						Interest Rate at December 31,								Maturity Date at
	2022			2021			2022				2021				December 31, 2022
Senior unsecured notes	$	6,803.0		$	7,002.1			1.90%	-	6.88%		1.90%	-	6.88%		Jan-2024 – Oct-2049
Credit facility (1)		-			-				n/a				n/a			Mar-2024
Fair value debt adjustments, net		44.4			81.0				n/a				n/a			n/a
Deferred financing costs, net (2)		(66.4	)		(56.0	)			n/a				n/a			n/a
	$	6,781.0		$	7,027.1				3.45%*				3.35%*

Unsecured Debt [Member]

Notes Tables

Schedule of Maturities of Long-Term Debt [Table Text Block]

	2023		2024		2025		2026		2027		Thereafter		Total
Principal payments	$	-	$	646.2	$	740.5	$	773.0	$	433.7	$	4,209.6	$	6,803.0