Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 983.8	$ 527.0	$ 619.1
Other comprehensive income (loss):
Unrealized gain on interest rate derivative instruments, net of tax of $42.4 million, $4.6 million and $7.5 million	159.5	17.2	28.1
Reclassification of interest rate derivative instruments gain, net of tax of $(54.5) million	(204.8)	0.0	0.0
Reclassification adjustment from cash flow hedges included in net income, net of tax of $0.5 million for each year presented	1.9	2.0	1.9
Foreign currency translation adjustments	0.6	(0.2)	(0.5)
Other comprehensive income (loss)	(42.8)	19.0	29.5
Comprehensive income	941.0	546.0	648.6
Less: comprehensive income attributable to noncontrolling interest	1.6	1.8	2.1
Comprehensive income attributable to Kansas City Southern and subsidiaries	$ 939.4	$ 544.2	$ 646.5