Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating activities:
Net income	$ 826.0	$ 709.3	$ 392.4
Adjustments to reconcile net income to net cash provided by operating activities:
Income from discontinued operations	0.0	0.0	(6.3)
Depreciation and amortization	266.4	244.6	211.5
Stock-based compensation expense	61.1	53.3	44.5
Excess tax benefits from stock-based compensation	(13.3)	(24.4)	(8.5)
Provision (benefit) for deferred income taxes	116.6	(5.8)	45.8
Net gains on railcar lease fleet sales owned more than one year at the time of sale	(166.1)	(92.3)	(20.4)
Gains on disposition of property and other assets	(12.7)	(12.1)	(0.8)
Non-cash interest expense	30.1	30.7	30.8
Other	(2.5)	(4.5)	(6.4)
Changes in assets and liabilities:
(Increase) decrease in receivables	(0.8)	(56.4)	17.2
(Increase) decrease in inventories	128.5	(186.3)	(95.6)
(Increase) decrease in restricted cash	(9.4)	25.0	(25.0)
(Increase) decrease in other assets	(40.9)	(8.3)	(29.1)
Increase (decrease) in accounts payable	(78.6)	60.7	29.0
Increase (decrease) in accrued liabilities	(169.6)	82.1	72.4
Increase (decrease) in other liabilities	4.9	2.6	8.2
Net cash provided by operating activities - continuing operations	939.7	818.2	659.7
Net cash provided by operating activities - discontinued operations	0.0	1.0	2.5
Net cash provided by operating activities	939.7	819.2	662.2
Investing activities:
(Increase) decrease in short-term marketable securities	(9.9)	74.7	(149.7)
Proceeds from railcar lease fleet sales owned more than one year at the time of sale	514.6	265.8	131.6
Proceeds from disposition of property and other assets	8.2	23.0	3.7
Capital expenditures – leasing, net of sold lease fleet railcars owned one year or less with a net cost of $295.9, $350.2 and $49.4	(833.8)	(245.3)	(581.1)
Capital expenditures – manufacturing and other	(196.0)	(219.3)	(149.9)
Acquisitions, net of cash acquired	(46.2)	(714.4)	(73.2)
Divestitures	51.3	0.0	0.0
Other	0.5	0.8	0.0
Net cash required by investing activities - continuing operations	(511.3)	(814.7)	(818.6)
Net cash provided by investing activities - discontinued operations	0.0	0.0	0.6
Net cash required by investing activities	(511.3)	(814.7)	(818.0)
Financing activities:
Proceeds from issuance of common stock, net	0.3	0.6	2.5
Excess tax benefits from stock-based compensation	13.3	24.4	8.5
Payments to retire debt	(587.2)	(186.6)	(262.1)
Proceeds from issuance of debt	242.4	727.3	175.0
(Increase) decrease in restricted cash	48.3	1.0	(12.5)
Shares repurchased	(115.0)	(36.5)	(103.2)
Dividends paid to common shareholders	(64.9)	(54.4)	(39.3)
Purchase of shares to satisfy employee tax on vested stock	(27.5)	(38.3)	(9.6)
Proceeds from sale of interests in partially-owned leasing subsidiaries	0.0	0.0	296.7
Repurchase of noncontrolling interests in partially-owned leasing subsidiary	0.0	0.0	(84.0)
Contributions from noncontrolling interest	0.0	49.6	50.0
Distributions to noncontrolling interest	(39.2)	(28.2)	(10.0)
Other	(0.8)	(2.5)	0.8
Net cash provided (required) by financing activities - continuing	(530.3)	456.4	12.8
Net cash provided (required) by financing activities - discontinued operations	0.0	(1.5)	(1.5)
Net cash provided (required) by financing activities	(530.3)	454.9	11.3
Net increase (decrease) in cash and cash equivalents	(101.9)	459.4	(144.5)
Cash and cash equivalents at beginning of period	887.9	428.5	573.0
Cash and cash equivalents at end of period	786.0	887.9	428.5
Supplemental Cash Flow Information
Interest paid	164.3	158.3	163.6
Income tax payments made, net	$ 326.8	$ 399.0	$ 110.9