Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Net gain on disposition of assets

The following table presents the net gain on asset dispositions for the years ended December 31 (in millions):

	2022		2021		2020
Net disposition gains	$	104.1	$	82.4	$	39.4
Residual sharing income	5.6		8.9		2.5
Non-remarketing net disposition gains	17.1		17.0		0.1
Asset impairments (1)	(48.9)		(2.4)		(0.3)
Net Gain on Asset Dispositions	$	77.9	$	105.9	$	41.7

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(1) See "Note 10. Asset Impairments and Assets Held for Sale" for further information about asset impairment losses.