Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities
Net income	$ 51.3	$ 103.4
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	140.1	134.7
Loss on extinguishment of debt, net	0.0	14.2
Gain on sale of Investment in CyrusOne	(117.7)	(151.9)
Provision for loss on receivables	5.6	7.2
Noncash portion of interest expense	1.5	2.4
Deferred income taxes	35.9	59.3
Pension and other postretirement payments less than (in excess of) expense	2.1	(3.9)
Stock-based compensation	5.2	4.8
Other, net	1.1	(3.1)
Changes in operating assets and liabilities, net of effects of acquisitions:
Decrease (increase) in receivables	20.8	(11.0)
Increase in inventory, materials, supplies, prepaid expenses and other current assets	(1.7)	(6.0)
Increase (decrease) in accounts payable	2.4	(3.9)
Increase (decrease) in accrued and other current liabilities	11.1	(3.9)
Decrease (increase) in other noncurrent assets	1.8	(2.1)
(Decrease) increase in other noncurrent liabilities	(2.7)	1.4
Net cash provided by operating activities	156.8	141.6
Cash flows from investing activities
Capital expenditures	(148.2)	(188.8)
Increase in restricted cash	0.0	(90.7)
Proceeds from sale of Investment in CyrusOne	140.7	181.2
Acquisitions of businesses	(9.6)	0.0
Dividends received from Investment in CyrusOne	0.0	6.2
Other, net	0.3	(0.8)
Net cash used in investing activities	(16.8)	(92.9)
Cash flows from financing activities
Proceeds from issuance of long-term debt	0.0	425.0
Net (decrease) increase in corporate credit and receivables facilities with initial maturities less than 90 days	(89.5)	5.9
Repayment of debt	(6.4)	(461.0)
Debt issuance costs	(1.3)	(8.4)
Dividends paid on preferred stock	(7.8)	(7.8)
Common stock repurchase	0.0	(4.8)
Other, net	(1.0)	3.5
Net cash used in financing activities	(106.0)	(47.6)
Net increase in cash and cash equivalents	34.0	1.1
Cash and cash equivalents at beginning of period	9.7	7.4
Cash and cash equivalents at end of period	43.7	8.5
Noncash investing and financing transactions:
Accrual of CyrusOne dividends	0.0	1.2
Acquisition of property by assuming debt and other noncurrent liabilities	16.7	10.9
Acquisition of property on account	$ 19.8	$ 43.0