Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating activities:
Net income	$ 392.4	$ 253.7	$ 145.7
Adjustments to reconcile net income to net cash provided by operating activities:
(Income) loss from discontinued operations	(6.3)	(1.8)	1.1
Depreciation and amortization	211.5	193.7	187.7
Stock-based compensation expense	44.5	27.7	22.8
Excess tax benefits from stock-based compensation	(8.5)	(0.6)	(3.2)
Provision for deferred income taxes	45.8	126.3	60.5
Net gains on railcar lease fleet sales owned more than one year at the time of sale	(20.4)	(33.5)	(16.2)
Gain on disposition of property, plant, equipment, and other assets	(0.8)	(4.6)	(6.2)
Gain on disposition of flood-damaged property, plant, equipment, and other assets	0	(0.4)	(17.6)
Non-cash interest expense	30.8	31.2	18.6
Other	(6.4)	(3.2)	1.4
Changes in assets and liabilities:
(Increase) decrease in receivables	17.2	2.7	(150.3)
(Increase) decrease in inventories	(95.6)	(128.0)	(234.4)
(Increase) decrease in restricted cash	(25.0)	0	0
(Increase) decrease in other assets	(29.1)	(41.5)	14.2
Increase (decrease) in accounts payable	29.0	(16.7)	74.9
Increase (decrease) in accrued liabilities	72.4	125.5	(11.5)
Increase (decrease) in other liabilities	8.2	(3.9)	14.0
Net cash provided by operating activities - continuing operations	659.7	526.6	101.5
Net cash provided by operating activities - discontinued operations	2.5	0.8	9.4
Net cash provided by operating activities	662.2	527.4	110.9
Investing activities:
(Increase) decrease in short-term marketable securities	(149.7)	0	158.0
Proceeds from railcar lease fleet sales owned more than one year at the time of sale	131.6	126.3	60.6
Proceeds from railcar lease fleet sales – sale and leaseback	0	58.3	44.4
Proceeds from disposition of property, plant, equipment, and other assets	3.7	16.8	8.5
Proceeds from disposition of flood-damaged property, plant, and equipment	0	0	23.3
Capital expenditures – leasing, net of sold lease fleet railcars owned one year or less with a net cost of $49.4, $93.8 and $46.2	(581.1)	(352.6)	(258.6)
Capital expenditures – manufacturing and other	(149.9)	(116.6)	(47.6)
Capital expenditures – replacement of flood-damaged property, plant, and equipment	0	0	(29.4)
Acquisitions, net of cash acquired	(73.2)	(46.2)	(42.5)
Other	0	1.7	0
Net cash required by investing activities - continuing operations	(818.6)	(312.3)	(83.3)
Net cash provided (required) by investing activities - discontinued operations	0.6	0.9	(1.7)
Net cash required by investing activities	(818.0)	(311.4)	(85.0)
Financing activities:
Proceeds from issuance of common stock, net	2.5	4.1	2.1
Excess tax benefits from stock-based compensation	8.5	0.6	3.2
Payments to retire debt	(262.1)	(378.4)	(1,112.3)
Proceeds from issuance of debt	175.0	443.8	1,143.3
(Increase) decrease in restricted cash	(12.5)	17.1	(33.2)
Shares repurchased	(103.2)	(45.2)	0
Dividends paid to common shareholders	(39.3)	(31.7)	(27.2)
Proceeds from sale of interests in partially-owned leasing subsidiaries	296.7	0	0
Repurchase of noncontrolling interests in partially-owned leasing subsidiary	(84.0)	0	0
Contributions from noncontrolling interest	50.0	0	0
Distributions to noncontrolling interest	(10.0)	0	(6.6)
Other	(8.8)	(5.3)	0
Net cash provided (required) by financing activities - continuing operations	12.8	5.0	(30.7)
Net cash provided (required) by financing activities - discontinued operations	(1.5)	0.9	1.9
Net cash provided (required) by financing activities	11.3	5.9	(28.8)
Net increase (decrease) in cash and cash equivalents	(144.5)	221.9	(2.9)
Cash and cash equivalents at beginning of period	573.0	351.1	354.0
Cash and cash equivalents at end of period	428.5	573.0	351.1
Supplemental Cash Flow Information
Interest paid	163.6	174.8	154.9
Net tax payments made	$ 110.9	$ 18.4	$ 2.5