Net Income per Common Share (Tables)

9 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Schedule of Reconciliation of Weighted Average Shares

A reconciliation of the weighted average basic common shares outstanding to the weighted average diluted common shares outstanding is as follows:

	Three Months Ended				Nine Months Ended
(millions, except share and per share data) (unaudited)	September 30, 2019		September 30, 2018		September 30, 2019		September 30, 2018
Net income attributable to SP Plus Corporation	$	14.2	$	13.5	$	40.0	$	44.1
Basic weighted average common shares outstanding	21,945,129		22,439,884		22,277,852		22,370,789
Dilutive impact of share-based awards	93,776		186,862		134,113		236,485
Diluted weighted average common shares outstanding	22,038,905		22,626,746		22,411,965		22,607,274
Net income per common share
Basic	$	0.64	$	0.60	$	1.79	$	1.97
Diluted	$	0.64	$	0.60	$	1.78	$	1.95