Significant Accounting Policies Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Net Gains (Losses) on Sale and Disposal of Property [Table Text Block]

The amount of gains and losses for the years ended December 31 were as follows:

(in millions)	2020		2019		2018
Gains on the sale of property	$	0.7	$	1.8	$	0.3
Losses on the sale and disposal of property	(0.5)		(2.4)		(0.8)
Net gains (losses) on sale and disposal of property	$	0.2	$	(0.6)	$	(0.5)