Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities
Net income (loss)	$ 7.0	$ (36.7)
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Depreciation and amortization	46.9	50.6
Provision for loss on receivables	2.4	2.6
(Income) loss from CyrusOne equity method investment	(0.5)	1.9
Noncash portion of interest expense	1.7	2.0
Deferred income tax provision	8.8	6.1
Pension and other postretirement payments in excess of expense	(6.0)	(3.1)
Stock-based compensation	0.8	2.3
Amortization of deferred gain	(3.6)	(0.6)
Loss on sale or disposal of assets, net	0	2.5
Excess tax benefit for share based payments	(0.1)	(0.5)
Other, net	(0.4)	0.5
Changes in operating assets and liabilities, net of CyrusOne deconsolidation:
(Increase) decrease in receivables	(22.1)	6.5
Increase in inventory, materials, supplies, prepaid expenses and other current assets	(4.0)	(5.3)
Increase in accounts payable	19.0	23.4
Decrease in accrued and other current liabilities	(10.2)	(0.9)
Decrease in other noncurrent assets	(0.4)	(0.4)
Decrease in other noncurrent liabilities	(2.3)	(9.4)
Net cash provided by operating activities	37.8	42.3
Cash flows from investing activities
Capital expenditures	(34.3)	(50.9)
Dividends received from CyrusOne	7.1	0
Proceeds from sale of assets	1.9	0.8
Release of restricted cash	0	0.4
Cash divested from deconsolidation of CyrusOne	0	(12.2)
Net cash used in investing activities	(25.3)	(61.9)
Cash flows from financing activities
Net (decrease) increase in corporate credit and receivables facilities with initial maturities less than 90 days	(4.1)	2.0
Repayment of debt	(5.2)	(3.1)
Dividends paid on preferred stock	(2.6)	(2.6)
Proceeds from exercise of options and warrants	0.6	6.6
Excess tax benefit for share based payments	0.1	0.5
Other, net	(1.7)	(2.3)
Net cash (used in) provided by financing activities	(12.9)	1.1
Net decrease in cash and cash equivalents	(0.4)	(18.5)
Cash and cash equivalents at beginning of period	4.6	23.6
Cash and cash equivalents at end of period	4.2	5.1
Noncash investing and financing transactions:
Investment in CyrusOne resulting from deconsolidation	0	509.7
Accrual of CyrusOne dividends	9.3	7.1
Acquisition of property by assuming debt and other noncurrent liabilities	0	1.0
Acquisition of property on account	$ 21.0	$ 25.4