Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating Activities
Net income	$ 115.1	$ 110.9
Adjustments to reconcile income to net cash provided by operating activities:
Depreciation	167.2	155.8
Change in accrued operating lease expense	(11.1)	(25.3)
Gains on sales of assets	(61.1)	(39.5)
Deferred income taxes	21.2	30.4
Change in income taxes payable	(0.6)	(4.9)
Share of affiliates’ earnings, net of dividends	(27.2)	(18.3)
Other	3.2	14.7
Net cash provided by operating activities	206.7	223.8
Investing Activities
Additions to operating assets and facilities	(367.0)	(295.3)
Purchases of leased-in assets	(39.1)	(79.3)
Portfolio proceeds	149.0	99.1
Proceeds from sales of other assets	20.9	14.9
Sale Leaseback Transaction, Net Proceeds, Investing Activities	0.0	90.7
Payments for (Proceeds from) Other Investing Activities	2.6	0.5
Net cash used in investing activities	(233.6)	(169.4)
Financing Activities
Net proceeds from issuances of debt (original maturities longer than 90 days)	297.1	297.6
Repayments of debt (original maturities longer than 90 days)	(263.1)	(301.5)
Net increase (decrease) in debt with original maturities of 90 days or less	0.1	11.5
Stock repurchases	(25.0)	(50.0)
Dividends	(35.7)	(35.2)
Other (add shares used to pay taxes)	(1.4)	(2.8)
Net cash (used in) provided by financing activities	(28.0)	(80.4)
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(3.7)	2.9
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(58.6)	(23.1)
Cash, Cash Equivalents, and Restricted Cash at beginning of period	299.7	311.1
Cash, Cash Equivalents, and Restricted Cash at end of period	$ 241.1	$ 288.0