Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net income	$ 120.9	$ 71.7	$ 196.2	$ 135.8
Other comprehensive income (loss):
Unrealized loss on cash flow hedges arising during the period, net of tax of $(0.2) million and $(0.4) million	(0.3)	0	(0.6)	0
Reclassification adjustment from cash flow hedges included in net income, net of tax of $0.1 million, $0.1 million and $0.2 million	0.2	0	0.2	0.2
Amortization of prior service credit, net of tax of less than $(0.1) million	(0.1)	(0.1)	(0.1)	(0.1)
Foreign currency translation adjustments, net of tax of $(0.3) million, less than $0.1 million, less than $0.1 million and $0.1 million	(0.4)	0.1	0.2	0.4
Other comprehensive income (loss)	(0.6)	0	(0.3)	0.5
Comprehensive income	120.3	71.7	195.9	136.3
Less: Comprehensive income attributable to noncontrolling interest	0.5	0.9	0.8	1.0
Comprehensive income attributable to Kansas City Southern and subsidiaries	$ 119.8	$ 70.8	$ 195.1	$ 135.3