Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net income	$ 379.4	$ 331.9	$ 180.0
Other comprehensive income (loss):
Unrealized loss on cash flow hedges arising during the period, net of tax of $(0.6) million and $(0.3) million	(1.0)	0	(0.4)
Reclassification adjustment from cash flow hedges included in net income, net of tax of $0.3 million, $0.2 million and $1.9 million	0.4	0.2	3.2
Amortization of prior service credit, net of tax of $(0.1) million	(0.1)	(0.2)	(0.2)
Foreign currency translation adjustments, net of tax of $0.4 million, $(0.5) million, and $0.2 million	0.5	(0.8)	0.4
Other comprehensive income (loss)	(0.2)	(0.8)	3.0
Comprehensive income	379.2	331.1	183.0
Less: comprehensive income (loss) attributable to noncontrolling interest	2.1	1.6	(0.2)
Comprehensive income attributable to Kansas City Southern and subsidiaries	$ 377.1	$ 329.5	$ 183.2