Unsecured Revolving Line of Credit (Tables)

12 Months Ended

Dec. 31, 2019

Line of Credit Facility [Line Items]

Line of credit facilities availability

The availability under the facilities in place for the years ended December 31 is shown in the following table (in millions):

	2019		2018
Unsecured revolving line of credit, expiring December 2021	$	400.0	$	400.0
Unsecured revolving line of credit, expiring March 2021	25.0		25.0
	425.0		425.0
Amounts outstanding at December 31:
Eurodollar borrowings	289.0		308.0
Letters of credit	—		0.2
	289.0		308.2
Net availability as of December 31	$	136.0	$	116.8