Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating activities:
Net income	$ 107.1	$ 105.7
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	152.6	146.5
Stock-based compensation expense	19.0	13.8
Provision for deferred income taxes	36.2	116.4
Net gains on railcar lease fleet sales owned more than one year at the time of sale	(11.6)	(23.7)
Gains on dispositions of property and other assets	(2.4)	(2.0)
Non-cash interest expense	12.6	14.7
Other	(0.7)	(0.6)
Changes in assets and liabilities:
(Increase) decrease in receivables	31.8	(52.8)
(Increase) decrease in inventories	26.1	39.6
(Increase) decrease in other assets	(26.4)	(0.9)
Increase (decrease) in accounts payable	29.9	11.0
Increase (decrease) in accrued liabilities	(27.8)	(4.9)
Increase (decrease) in other liabilities	1.9	(26.7)
Net cash provided (required) by operating activities	348.3	336.1
Investing activities:
(Increase) decrease in short-term marketable securities	294.5	55.1
Proceeds from dispositions of property and other assets	5.5	6.0
Proceeds from railcar lease fleet sales owned more than one year at the time of sale	56.4	92.4
Capital expenditures – leasing, net of sold lease fleet railcars owned one year or less with a net cost of $24.8 and $5.6	(503.2)	(271.6)
Capital expenditures – manufacturing and other	(33.9)	(43.4)
Acquisitions, net of cash acquired	(25.0)	(5.3)
Other	1.3	(2.1)
Net cash provided (required) by investing activities	(204.4)	(168.9)
Financing activities:
Payments to retire debt	(674.6)	(98.3)
Proceeds from issuance of debt	478.0	299.4
Shares repurchased	(102.2)	(41.9)
Dividends paid to common shareholders	(39.3)	(33.5)
Purchase of shares to satisfy employee tax on vested stock	(11.3)	(14.0)
Distributions to noncontrolling interest	(10.3)	(16.9)
Other	(3.1)	(0.1)
Net cash provided (required) by financing activities	(362.8)	94.7
Net (decrease) increase in cash, cash equivalents, and restricted cash	(218.9)	261.9
Cash, cash equivalents, and restricted cash at beginning of period	973.8	741.6
Cash, cash equivalents, and restricted cash at end of period	$ 754.9	$ 1,003.5