Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net income	$ 148.7	$ 134.7	$ 293.6	$ 281.6
Other comprehensive income (loss):
Unrealized gain (loss) on interest rate derivative instruments during the period, net of tax of $0.5 million, $(1.5) million, $2.1 million and $(1.5) million, respectively	1.5	(2.3)	6.0	(2.3)
Foreign currency translation adjustments, net of tax of $0.3 million and $0.8 million, respectively, for 2017	(1.2)	0.5	0.0	1.3
Other comprehensive income (loss)	0.3	(1.8)	6.0	(1.0)
Comprehensive income	149.0	132.9	299.6	280.6
Less: Comprehensive income attributable to noncontrolling interest	0.5	0.3	0.9	0.6
Comprehensive income attributable to Kansas City Southern and subsidiaries	$ 148.5	$ 132.6	$ 298.7	$ 280.0