Note 12 - Notes Payable (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Debt [Table Text Block]

Type	Date Paid	Amount Repaid		Interest Rate		Maturity Date
Senior unsecured notes (1)	Aug-18	$	300.0		6.875%	Oct-19
Senior unsecured notes (2)	Jun-18 & Jul-18	$	15.1		3.200%	May-21

Schedule of Debt Issuance [Table Text Block]

Date Issued	Maturity Date	Amount Issued		Interest Rate
Aug-19	Oct-49	$	350.0		3.70%

Notes Payable [Member]

Notes Tables

Schedule of Debt [Table Text Block]

	Carrying Amount at December 31,						Interest Rate at December 31,								Maturity Date at
	2019			2018			2019				2018				December 31, 2019
Senior unsecured notes	$	4,684.9		$	4,334.9			2.70%	-	4.45%		2.70%	-	6.88%		May-2021– Oct 2049
Credit facility		200.0			100.0			(a)				(a)				Mar-2021
Deferred financing costs, net		(53.1	)		(53.4	)		n/a				n/a				n/a
	$	4,831.8		$	4,381.5			3.46%*				3.48%*

Unsecured Debt [Member]

Notes Tables

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

	2020		2021		2022		2023		2024		Thereafter		Total
Principal payments	$	-	$	684.9	$	500.0	$	350.0	$	400.0	$	2,950.0	$	4,884.9