Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities
Net income	$ 60.4	$ 7.0
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	45.8	43.4
Gain on extinguishment of debt	0.0	(2.4)
Gain on sale of Investment in CyrusOne	(117.7)	0.0
Provision for loss on receivables	1.8	1.9
Noncash portion of interest expense	0.5	1.0
Deferred income taxes	34.4	4.4
Pension and other postretirement payments less than (in excess of) expense	1.0	(1.3)
Stock-based compensation	2.9	1.2
Other, net	(1.2)	(1.8)
Changes in operating assets and liabilities, net of effects of acquisitions:
Decrease in receivables	14.6	17.2
Increase in inventory, materials, supplies, prepaid expenses and other current assets	(5.6)	(4.7)
Increase (decrease) in accounts payable	5.8	(3.2)
Increase in accrued and other current liabilities	7.1	2.8
Decrease in other noncurrent assets	0.8	0.5
Increase (decrease) in other noncurrent liabilities	3.3	(0.3)
Net cash provided by operating activities	53.9	65.7
Cash flows from investing activities
Capital expenditures	(55.1)	(62.4)
Proceeds from sale of Investment in CyrusOne	140.7	0.0
Acquisitions of businesses	(9.2)	0.0
Dividends received from Investment in CyrusOne (equity method investment)	0.0	2.1
Other, net	0.5	(0.1)
Net cash provided by (used in) investing activities	76.9	(60.4)
Cash flows from financing activities
Net (decrease) increase in corporate credit and receivables facilities with initial maturities less than 90 days	(89.5)	28.9
Repayment of debt	(2.1)	(30.9)
Debt issuance costs	(0.5)	0.0
Dividends paid on preferred stock	(2.6)	(2.6)
Other, net	(1.1)	(0.2)
Net cash used in financing activities	(95.8)	(4.8)
Net increase in cash and cash equivalents	35.0	0.5
Cash and cash equivalents at beginning of period	9.7	7.4
Cash and cash equivalents at end of period	44.7	7.9
Noncash investing and financing transactions:
Accrual of CyrusOne dividends	0.0	2.7
Acquisition of property by assuming debt and other noncurrent liabilities	6.9	7.1
Acquisition of property on account	$ 27.3	$ 27.3