Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities
Net (loss) income	$ (54.7)	$ 11.2	$ 18.6
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	169.6	217.4	199.5
Loss on extinguishment of debt	29.6	13.6	0
Loss from CyrusOne equity method investment	10.7	0	0
Loss (gain) on sale of assets	2.4	(1.6)	(8.4)
Impairment of goodwill and other assets	0	14.2	52.4
Provision for loss on receivables	11.3	13.9	13.9
Noncash portion of interest expense	7.5	7.8	7.7
Deferred income taxes expense, including valuation allowance change	(2.7)	21.6	24.9
Pension and other postretirement benefits in excess of expense	(49.7)	(28.4)	(19.5)
Stock-based compensation	4.9	5.2	4.1
Excess tax benefit for share based payments	(0.5)	(2.4)	0
Other, net	(6.7)	(1.4)	(3.7)
Changes in operating assets and liabilities, net of effects of divestitures:
Decrease (increase) in receivables	0.5	(33.6)	(10.6)
Increase in inventory, materials, supplies, prepaid expenses and other current assets	(0.8)	(14.5)	(5.9)
(Decrease) increase in accounts payable	(17.7)	(6.9)	19.2
Decrease in accrued and other current liabilities	(18.1)	(10.0)	(0.5)
Decrease in other noncurrent assets	0.8	4.6	1.1
(Decrease) increase in other noncurrent liabilities	(7.6)	2.0	(2.9)
Net cash provided by operating activities	78.8	212.7	289.9
Cash flows from investing activities
Capital expenditures	(196.9)	(367.2)	(255.5)
Dividends received from CyrusOne	21.3	0	0
Proceeds from sale of assets	2.0	1.6	11.5
Increase in restricted cash	0	(11.1)	0
Release of restricted cash	0.4	4.9	0
Cash divested from deconsolidation of CyrusOne	(12.2)	0	0
Other, net	0	0	(0.7)
Net cash used in investing activities	(185.4)	(371.8)	(244.7)
Cash flows from financing activities
Proceeds from issuance of long-term debt	536.0	525.0	0
Net increase in corporate credit and receivables facilities with initial maturities less than 90 days	94.2	52.0	0.4
Repayment of debt	(530.8)	(442.4)	(11.5)
Debt issuance costs	(6.7)	(20.9)	(0.8)
Dividends paid on preferred stock	(10.4)	(10.4)	(10.4)
CyrusOne stock issuance costs	0	(5.7)	0
Common stock repurchase	0	(0.3)	(10.4)
Proceeds from exercise of options and warrants	7.1	12.1	0.4
Excess tax benefit for share based payments	0.5	2.4	0
Financing obligations and other, net	(2.3)	(2.8)	(16.5)
Net cash provided by (used in) financing activities	87.6	109.0	(48.8)
Net decrease in cash and cash equivalents	(19.0)	(50.1)	(3.6)
Cash and cash equivalents at beginning of year	23.6	73.7	77.3
Cash and cash equivalents at end of year	$ 4.6	$ 23.6	$ 73.7