Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities
Net (loss) income	$ (8.3)	$ 60.6
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	51.2	45.8
Gain on sale of Investment in CyrusOne	0.0	(117.7)
Provision for loss on receivables	1.0	1.8
Noncash portion of interest expense	0.8	0.5
Deferred income taxes	(1.2)	34.5
Pension and Other postretirement payments less than expense	0.4	1.0
Stock-based compensation	1.2	2.9
Other, net	(2.0)	(1.2)
Changes in operating assets and liabilities, net of effects of acquisitions:
Decrease in receivables	6.5	14.6
Increase in inventory, materials, supplies, prepaid expenses and other current assets	(4.4)	(5.6)
Increase in accounts payable	3.6	5.8
Increase in accrued and other current liabilities	9.6	7.1
Decrease in other noncurrent assets	0.5	0.5
(Decrease) increase in other noncurrent liabilities	(0.4)	3.3
Net cash provided by operating activities	58.5	53.9
Cash flows from investing activities
Capital expenditures	(32.7)	(55.1)
Proceeds from sale of Investment in CyrusOne	0.0	140.7
Acquisitions of businesses	(2.8)	(9.2)
Other, net	(0.1)	0.5
Net cash (used in) provided by investing activities	(35.6)	76.9
Cash flows from financing activities
Net decrease in corporate credit and receivables facilities with initial maturities less than 90 days	0.0	(89.5)
Repayment of debt	(3.0)	(2.1)
Debt issuance costs	(0.4)	(0.5)
Dividends paid on preferred stock	(2.6)	(2.6)
Other, net	(2.0)	(1.1)
Net cash used in financing activities	(8.0)	(95.8)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	0.8	0.0
Net increase in cash, cash equivalents and restricted cash	15.7	35.0
Cash, cash equivalents and restricted cash at beginning of period	396.5	9.7
Cash, cash equivalents and restricted cash at end of period	412.2	44.7
Noncash investing and financing transactions:
Acquisition of property by assuming debt and other noncurrent liabilities	0.0	6.9
Acquisition of property on account	$ 17.6	$ 27.3