Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Operating Activities
Net income	$ 107.6	$ 79.2
Adjustments to reconcile net income to net cash provided by operating activities:
Gains on sales of assets	(52.0)	(51.2)
Depreciation	184.9	176.0
Deferred income taxes	31.8	18.9
Share of affiliates' earnings, net of dividends	(12.8)	(28.2)
Change in income taxes payable	(9.6)	11.5
Change in accrued operating lease expense	(36.6)	(32.5)
Employee benefit plans	0.5	(4.0)
Other	10.8	19.2
Net cash provided by operating activities	224.6	188.9
Investing Activities
Additions to operating assets and facilities	(498.1)	(327.7)
Loans extended	(1.0)	(19.1)
Investments in affiliates	(24.3)	(113.2)
Other		(0.1)
Portfolio investments and capital additions	(523.4)	(460.1)
Purchases of leased-in assets	(1.3)	(61.1)
Portfolio proceeds	260.2	108.9
Proceeds from sales of other assets	22.5	31.5
Proceeds from sale-leaseback	71.3
Net decrease in restricted cash	7.6	6.0
Net cash used in investing activities	(163.1)	(374.8)
Financing Activities
Net proceeds from issuances of debt (original maturities longer than 90 days)	312.9	545.9
Repayments of debt (original maturities longer than 90 days)	(334.5)	(277.1)
Net increase in debt with original maturities of 90 days or less	188.2	9.1
Payments on capital lease obligations	(3.0)	(18.5)
Employee exercises of stock options	2.9	5.1
Derivative settlements	(1.4)	(1.1)
Dividends	(43.6)	(42.3)
Net cash provided by financing activities	121.5	221.1
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(0.8)	1.3
Net increase in Cash and Cash Equivalents during the period	182.2	36.5
Cash and Cash Equivalents at beginning of period	248.4	78.5
Cash and Cash Equivalents at end of period	$ 430.6	$ 115.0