CyrusOne (CONE) 10-Q 12 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Nov. 01, 2013
Entity Information [Line Items]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-13	'
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'Q3	'
Trading Symbol	'CONE	'
Entity Registrant Name	'CyrusOne Inc.	'
Entity Central Index Key	'0001553023	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Non-accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	21,991,521
CyrusOne L.P. [Member]	'	'
Entity Information [Line Items]	'	'
Entity Registrant Name	'CyrusOne LP	'
Entity Central Index Key	'0001575810	'
Entity Filer Category	'Non-accelerated Filer	'

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Successor [Member]	'	'
Investment in real estate:	'	'
Land	$81.50	'
Buildings and improvements	778.2	'
Equipment	134.3	'
Construction in progress	63.2	'
Subtotal	1,057.20	'
Accumulated depreciation	-218.6	'
Net investment in real estate	838.6	'
Cash and cash equivalents	213.2	'
Rent and other receivables, net of allowance for doubtful accounts of $0.5 and $0.3 as of September 30, 2013, and December 31, 2012, respectively	33.9	'
Restricted cash	0	'
Goodwill	276.2	'
Intangible assets, net of accumulated amortization of $50.9 and $38.2 as of September 30, 2013, and December 31, 2012, respectively	89.9	'
Due from affiliates	0.9	'
Other assets	67.2	'
Total assets	1,519.90	'
Liabilities and equity	'	'
Accounts payable and accrued expenses	67.8	'
Deferred revenue	55.1	'
Due to affiliates	7	'
Capital lease obligations	18.8	'
Long-term debt	525	'
Other financing arrangements	55.8	'
Total liabilities	729.5	'
Commitments and contingencies	'	'
Equity	'	'
Preferred stock, $.01 par value, 100,000,000 authorized; no shares issued or outstanding	0	'
Common stock, $.01 par value, 500,000,000 shares authorized and 22,120,237 shares issued and outstanding at June 30, 2013 and Common stock, $.01 par value, 1,000 shares authorized and 100 shares issued and outstanding at December 31, 2012	0.2	0
Additional paid in capital	339.4	'
Accumulated deficit	-14.2	'
Partnership capital	0	'
Total shareholders’ equity/Parent’s net investments	325.4	'
Noncontrolling interest	465	'
Total equity	790.4	'
Total liabilities and equity	1,519.90	'
Successor [Member] | CyrusOne L.P. [Member]	'	'
Investment in real estate:	'	'
Land	81.5	'
Buildings and improvements	778.2	'
Equipment	134.3	'
Construction in progress	63.2	'
Subtotal	1,057.20	'
Accumulated depreciation	-218.6	'
Net investment in real estate	838.6	'
Cash and cash equivalents	213.2	'
Rent and other receivables, net of allowance for doubtful accounts of $0.5 and $0.3 as of September 30, 2013, and December 31, 2012, respectively	33.9	'
Restricted cash	0	'
Goodwill	276.2	'
Intangible assets, net of accumulated amortization of $50.9 and $38.2 as of September 30, 2013, and December 31, 2012, respectively	89.9	'
Due from affiliates	0.9	'
Other assets	67.2	'
Total assets	1,519.90	'
Liabilities and equity	'	'
Accounts payable and accrued expenses	67.8	'
Deferred revenue	55.1	'
Due to affiliates	7	'
Capital lease obligations	18.8	'
Long-term debt	525	'
Other financing arrangements	55.8	'
Total liabilities	729.5	'
Commitments and contingencies	'	'
Equity	'	'
Total equity	790.4	'
Total liabilities and equity	1,519.90	'
Predecessor [Member]	'	'
Investment in real estate:	'	'
Land	'	44.5
Buildings and improvements	'	722.5
Equipment	'	52.4
Construction in progress	'	64.2
Subtotal	'	883.6
Accumulated depreciation	'	-176.7
Net investment in real estate	'	706.9
Cash and cash equivalents	'	16.5
Rent and other receivables, net of allowance for doubtful accounts of $0.5 and $0.3 as of September 30, 2013, and December 31, 2012, respectively	'	33.2
Restricted cash	'	6.3
Goodwill	'	276.2
Intangible assets, net of accumulated amortization of $50.9 and $38.2 as of September 30, 2013, and December 31, 2012, respectively	'	102.6
Due from affiliates	'	2.2
Other assets	'	67
Total assets	'	1,210.90
Liabilities and equity	'	'
Accounts payable and accrued expenses	'	37.1
Deferred revenue	'	52.8
Due to affiliates	'	2.9
Capital lease obligations	'	32.2
Long-term debt	'	525
Other financing arrangements	'	60.8
Total liabilities	'	710.8
Commitments and contingencies	'	'
Equity	'	'
Preferred stock, $.01 par value, 100,000,000 authorized; no shares issued or outstanding	'	0
Common stock, $.01 par value, 500,000,000 shares authorized and 22,120,237 shares issued and outstanding at June 30, 2013 and Common stock, $.01 par value, 1,000 shares authorized and 100 shares issued and outstanding at December 31, 2012	0	0
Additional paid in capital	'	7.1
Accumulated deficit	'	0
Partnership capital	'	493
Total shareholders’ equity/Parent’s net investments	'	500.1
Noncontrolling interest	'	0
Total equity	'	500.1
Total liabilities and equity	'	1,210.90
Predecessor [Member] | CyrusOne L.P. [Member]	'	'
Investment in real estate:	'	'
Land	'	44.5
Buildings and improvements	'	722.5
Equipment	'	52.4
Construction in progress	'	64.2
Subtotal	'	883.6
Accumulated depreciation	'	-176.7
Net investment in real estate	'	706.9
Cash and cash equivalents	'	16.5
Rent and other receivables, net of allowance for doubtful accounts of $0.5 and $0.3 as of September 30, 2013, and December 31, 2012, respectively	'	33.2
Restricted cash	'	6.3
Goodwill	'	276.2
Intangible assets, net of accumulated amortization of $50.9 and $38.2 as of September 30, 2013, and December 31, 2012, respectively	'	102.6
Due from affiliates	'	2.2
Other assets	'	59.1
Total assets	'	1,203
Liabilities and equity	'	'
Accounts payable and accrued expenses	'	36.3
Deferred revenue	'	52.8
Due to affiliates	'	2.9
Capital lease obligations	'	32.2
Long-term debt	'	525
Other financing arrangements	'	60.8
Total liabilities	'	710
Commitments and contingencies	'	'
Equity	'	'
Total equity	'	493
Total liabilities and equity	'	$1,203

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013
In Millions, except Share data, unless otherwise specified	Predecessor [Member]	Successor [Member]	CyrusOne L.P. [Member]	CyrusOne L.P. [Member]
			Predecessor [Member]	Successor [Member]
Allowance for doubtful accounts receivable	$0.30	$0.50	$0.30	$0.50
Accumulated amortization, net	$38.20	$50.90	$38.20	$50.90
Preferred stock par value (in dollars per share)	$0.01	$0.01	$0.01	$0.01
Preferred stock authorized (in shares)	100,000,000	100,000,000	'	100,000,000
Preferred stock issued (in shares)	0	0	0	0
Preferred stock outstanding (in shares)	0	0	0	0
Common stock par value (in dollars per share)	$0.01	$0.01	$0.01	$0.01
Common stock shares authorized (in shares)	1,000	500,000,000	1,000	500,000,000
Common stock issued (in shares)	100	22,116,172	100	22,116,172
Common stock outstanding (in shares)	100	22,116,172	100	22,116,172

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (USD $)	1 Months Ended	3 Months Ended		8 Months Ended	9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Jan. 23, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Costs and expenses:	'	'	'	'	'
Restructuring Charges	'	'	'	$0.70	'
Gains (Losses) on Sales of Other Real Estate	0	0	0.1	0	'
Successor [Member]	'	'	'	'	'
Revenue	'	67.5	'	176.1	'
Costs and expenses:	'	'	'	'	'
Property operating expenses	'	24.2	'	64.1	'
Sales and marketing	'	2.3	'	7.3	'
General and administrative	'	7.2	'	19.7	'
Transaction-related compensation	'	0	'	0	'
Depreciation and amortization	'	23.9	'	63.3	'
Restructuring Charges	'	0.7	'	0.7	'
Transaction costs	'	0.7	'	1.1	'
Management fees charged by CBI	'	0	'	0	'
Loss on sale of receivables to an affiliate	'	0	'	0	'
Asset impairments	'	0	'	0	'
Total costs and expenses	'	59	'	156.2	'
Operating income (loss)	'	8.5	'	19.9	'
Interest expense	'	10.5	'	29.7	'
Other Nonoperating Income	'	0.1	'	0.1	'
Loss on extinguishment of debt	'	0	'	1.3	'
Income (loss) before income taxes	'	-1.9	'	-11	'
Income tax (expense) benefit	'	-0.3	'	-0.8	'
Income (Loss) from Continuing Operations Attributable to Parent	'	-2.2	'	-11.8	'
Net income (loss) attributed to common shareholders	'	-2.2	-13.4	-11.8	'
Noncontrolling interest in net loss	'	1.4	'	7.8	'
Net loss attributed to common shareholders	'	-0.8	'	-4	'
Basic weighted average common shares outstanding (in shares)	'	20.9	'	20.9	'
Diluted weighted average common shares outstanding (in shares)	'	20.9	'	20.9	'
Loss per share - basic and diluted (in dollars per share)	'	($0.05)	'	($0.22)	'
Dividend declared per share (in dollars per share)	'	$0.16	'	$0.48	'
Successor [Member] | CyrusOne L.P. [Member]	'	'	'	'	'
Revenue	'	67.5	'	176.1	'
Costs and expenses:	'	'	'	'	'
Property operating expenses	'	24.2	'	64.1	'
Sales and marketing	'	2.3	'	7.3	'
General and administrative	'	7.2	'	19.7	'
Transaction-related compensation	'	0	'	0	'
Depreciation and amortization	'	23.9	'	63.3	'
Restructuring Charges	'	0.7	'	0.7	'
Transaction costs	'	0.7	'	1.1	'
Management fees charged by CBI	'	0	'	0	'
Loss on sale of receivables to an affiliate	'	0	'	0	'
Asset impairments	'	0	'	0	'
Total costs and expenses	'	59	'	156.2	'
Operating income (loss)	'	8.5	'	19.9	'
Interest expense	'	10.5	'	29.7	'
Other Nonoperating Income	'	-0.1	'	-0.1	'
Loss on extinguishment of debt	'	0	'	1.3	'
Income (loss) before income taxes	'	-1.9	'	-11	'
Income tax (expense) benefit	'	-0.3	'	-0.8	'
Income (Loss) from Continuing Operations Attributable to Parent	-20.2	'	-2.9	'	-13.5
Gains (Losses) on Sales of Other Real Estate	0	0	0.1	0	0.1
Net income (loss) attributed to common shareholders	'	-2.2	'	-11.8	'
Predecessor [Member]	'	'	'	'	'
Revenue	15.1	'	56.7	'	162.8
Costs and expenses:	'	'	'	'	'
Property operating expenses	4.8	'	20	'	55.3
Sales and marketing	0.7	'	2.1	'	5.8
General and administrative	1.5	'	5.3	'	15.4
Transaction-related compensation	20	'	0	'	0
Depreciation and amortization	5.3	'	18.8	'	52.9
Transaction costs	0.1	'	0.6	'	1.3
Management fees charged by CBI	0	'	0.9	'	2.1
Loss on sale of receivables to an affiliate	0	'	1.3	'	3.7
Asset impairments	0	'	0	'	13.3
Total costs and expenses	32.4	'	49	'	149.8
Operating income (loss)	-17.3	'	7.7	'	13
Interest expense	2.5	'	11.3	'	31.2
Loss on extinguishment of debt	0	'	0	'	0
Income (loss) before income taxes	-19.8	'	-3.6	'	-18.2
Income tax (expense) benefit	-0.4	'	0.7	'	4.7
Income (Loss) from Continuing Operations Attributable to Parent	-20.2	'	-2.9	'	-13.5
Gains (Losses) on Sales of Other Real Estate	'	'	0.1	'	0.1
Net income (loss) attributed to common shareholders	-20.2	'	-2.8	'	-13.4
Predecessor [Member] | CyrusOne L.P. [Member]	'	'	'	'	'
Revenue	15.1	'	56.7	'	162.8
Costs and expenses:	'	'	'	'	'
Property operating expenses	4.8	'	20	'	55.3
Sales and marketing	0.7	'	2.1	'	5.8
General and administrative	1.5	'	5.3	'	15.4
Transaction-related compensation	20	'	0	'	0
Depreciation and amortization	5.3	'	18.8	'	52.9
Restructuring Charges	0	'	0	'	0
Transaction costs	0.1	'	0.6	'	1.3
Management fees charged by CBI	0	'	0.9	'	2.1
Loss on sale of receivables to an affiliate	0	'	1.3	'	3.7
Asset impairments	0	'	0	'	13.3
Total costs and expenses	32.4	'	49	'	149.8
Operating income (loss)	-17.3	'	7.7	'	13
Interest expense	2.5	'	11.3	'	31.2
Other Nonoperating Income	0	'	0	'	0
Loss on extinguishment of debt	0	'	0	'	0
Income (loss) before income taxes	-19.8	'	-3.6	'	-18.2
Income tax (expense) benefit	-0.4	'	0.7	'	4.7
Net income (loss) attributed to common shareholders	($20.20)	'	($2.80)	'	($13.40)

Condensed_Consolidated_Stateme1

Condensed Consolidated Statement of Equity (USD $)

Total

CyrusOne L.P. [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

In Millions, unless otherwise specified

USD ($)

CyrusOne L.P. [Member]

Common Stock Issued

Additional Paid In Capital

Accumulated Deficit

Partnership capital

Total Shareholder’s Equity/ Parent’s Net Investment

Non Controlling Interest

Partnership Units

Partnership Capital

USD ($)

CyrusOne L.P. [Member]

Common Stock Issued

Additional Paid In Capital

Accumulated Deficit

Partnership capital

Total Shareholder’s Equity/ Parent’s Net Investment

Non Controlling Interest

Partnership Units

Partnership Capital

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

USD ($)

USD ($)

Beginning Balance at Dec. 31, 2012

'

'

$500.10

$493

$0

$7.10

$0

$493

$500.10

$0

'

$493

'

'

'

'

'

'

'

'

'

'

Beginning Balance (in shares) at Dec. 31, 2012

'

'

'

'

0

'

'

'

'

'

123.6

'

'

'

'

'

'

'

'

'

'

'

Increase (Decrease) in Stockholders' Equity [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net loss

'

'

-20.2

-20.2

'

'

'

-20.2

-20.2

'

'

-20.2

'

'

'

'

'

'

'

'

'

'

Other contributions from Parent

'

'

1.3

'

'

'

'

1.3

1.3

'

'

1.3

'

'

'

'

'

'

'

'

'

'

Distribution to CyrusOne Inc.

'

'

'

'

'

'

'

'

'

'

'

-2.4

'

'

'

'

'

'

'

'

'

'

Partnership reverse unit split, conversion ratio

'

'

'

'

'

'

'

'

'

'

2.8

'

'

'

'

'

'

'

'

'

'

'

Partnership reverse unit split 2.8 to 1

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

Partnership reverse unit split 2.8 to 1 (in shares)

'

'

'

'

'

'

'

'

'

'

-79.5

'

'

'

'

'

'

'

'

'

'

'

Contributions from Parent–transaction compensation expense reimbursement

'

'

19.6

'

'

'

'

19.6

19.6

'

'

19.6

'

'

'

'

'

'

'

'

'

'

Noncontrolling interest effective January 24, 2013

'

'

'

'

'

-7.1

'

-493.7

-500.8

500.8

'

'

'

'

'

'

'

'

'

'

'

'

Common stock issued

'

'

337.1

'

0.2

336.9

'

'

337.1

'

'

337.1

'

'

'

'

'

'

'

'

'

'

Common stock issued, shares

'

'

'

'

19

'

'

'

'

'

22.1

'

'

'

'

'

'

'

'

'

'

'

Common stock issued to CBI in exchange for operating partnership units

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

Common stock issued to CBI in exchange for operating partnership units (in shares)

'

'

'

'

1.5

'

'

'

'

'

1.5

'

'

'

'

'

'

'

'

'

'

'

Common stock issued to CBI in exchange for settlement of IPO costs paid by CBI

'

'

'

'

'

7.1

'

'

7.1

-7.1

'

'

'

'

'

'

'

'

'

'

'

'

Common stock issued to CBI in exchange for settlement of IPO costs paid by CBI, shares

'

'

'

'

0.4

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

IPO costs

'

'

-9.5

'

'

-9.5

'

'

-9.5

'

'

'

'

'

'

'

'

'

'

'

'

'

Restricted shares issued

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

Restricted shares issued (in shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.2

'

'

'

'

'

'

'

Stock based compensation

'

'

'

'

'

'

'

'

'

'

'

4.9

'

'

'

'

'

'

'

'

'

'

Ending Balance at Jan. 23, 2013

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Increase (Decrease) in Stockholders' Equity [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net loss

'

'

'

'

'

'

'

'

'

'

'

'

-11.8

-11.8

'

'

-11.8

'

-11.8

'

'

'

Noncontrolling interest allocated net loss

'

'

'

'

'

'

'

'

'

'

'

'

7.8

'

'

'

7.8

'

7.8

-7.8

'

'

Stock based compensation

'

'

'

'

'

'

'

'

'

'

'

'

4.9

'

'

4.9

'

'

4.9

'

'

'

Dividends declared, $0.48 per share

'

'

'

'

'

'

'

'

'

'

'

'

-31.1

'

'

'

-10.2

'

-10.2

-20.9

'

-31.1

Ending Balance at Sep. 30, 2013

'

'

'

'

'

'

'

'

'

'

'

'

790.4

790.4

0.2

339.4

-14.2

0

325.4

465

'

790.4

Ending Balance (in shares) at Sep. 30, 2013

'

'

'

'

'

'

'

'

'

'

'

'

'

'

22.1

'

'

'

'

'

64.7

'

Beginning Balance at Jun. 30, 2013

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Increase (Decrease) in Stockholders' Equity [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net loss

'

'

'

'

'

'

'

'

'

'

'

'

-2.2

-2.2

'

'

'

'

'

'

'

'

Noncontrolling interest allocated net loss

'

'

'

'

'

'

'

'

'

'

'

'

1.4

'

'

'

'

'

'

'

'

'

Ending Balance at Sep. 30, 2013

'

'

'

'

'

'

'

'

'

'

'

'

$790.40

$790.40

$0.20

'

'

$0

'

'

'

'

Ending Balance (in shares) at Sep. 30, 2013

'

'

'

'

'

'

'

'

'

'

'

'

'

'

22.1

'

'

'

'

'

64.7

'

Condensed_Consolidated_Stateme2

Condensed Consolidated Statement Of Equity (Parenthetical) (USD $)	8 Months Ended			1 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Jan. 23, 2013
	Successor [Member]	Successor [Member]	Successor [Member]	CyrusOne L.P. [Member]
	Accumulated Deficit	Total Shareholder’s Equity/ Parent’s Net Investment	Non Controlling Interest	Predecessor [Member]
				Partnership Units
Dividends declared per share (in dollars per share)	$0.32	$0.32	$0.32	'
Partnership reverse unit split, conversion ratio	'	'	'	2.8

Condensed_Consolidated_Stateme3

Condensed Consolidated Statements of Cash Flows (USD $)	9 Months Ended	1 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended	8 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2012	Jan. 23, 2013	Sep. 30, 2012	Jan. 23, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2013
		Predecessor [Member]	Predecessor [Member]	Predecessor [Member]	Predecessor [Member]	Successor [Member]	Successor [Member]
				CyrusOne L.P. [Member]	CyrusOne L.P. [Member]		CyrusOne L.P. [Member]
Net cash provided by (used in) operating activities	'	$2	$42.80	$2	$42.80	$62.80	$62.80
Cash flows from investing activities:	'	'	'	'	'	'	'
Capital expenditures – acquisitions of real estate	'	0	-25.4	0	-25.4	-33.3	-33.3
Capital expenditures – other development	'	-7.7	-121	-7.7	-121	-124.6	-124.6
Release of restricted cash	'	1.9	-11.1	0	-11.1	0	0
Proceeds From Release Of Restricted Cash	'	1.9	0.7	1.9	0.7	4.4	4.4
Advances to affiliates	'	0	-9.6	0	-9.6	0	0
Proceeds from Sale of Property, Plant, and Equipment	0.2	'	'	0	0.2	'	0
Net cash provided by (used in) investing activities	'	-5.8	-166.2	-5.8	-166.2	-153.5	-153.5
Cash flows from financing activities:	'	'	'	'	'	'	'
Issuance of common stock	'	0	0	0	0	360.5	337.1
IPO costs	'	0	0	'	'	-23.4	'
Borrowings from affiliates, net	'	0	131.9	0	131.9	0	0
Dividends paid	'	0	0	0	0	-20.7	-20.7
Payments on capital leases and other financing arrangements	'	-0.6	-5.2	-0.6	-5.2	-3.7	-3.7
Payments to buyout capital leases	'	0	0	0	0	-9.6	-9.6
Payment to buyout other financing arrangement	'	0	0	0	0	-10.2	-10.2
Contributions (distributions) from (to) parent, net	'	0.2	-0.7	0.2	-0.7	0	0
Debt Issuance Cost	0	'	'	0	0	-1.3	-1.3
Net cash provided by (used in) financing activities	'	-0.4	126	-0.4	126	291.6	291.6
Net increase (decrease) in cash and cash equivalents	'	-4.2	2.6	-4.2	2.6	200.9	200.9
Cash and cash equivalents at beginning of period	'	16.5	0.6	16.5	0.6	12.3	12.3
Cash and cash equivalents at end of period	'	12.3	3.2	12.3	3.2	213.2	213.2
Supplemental disclosures	'	'	'	'	'	'	'
Cash paid for interest, net of amount capitalized	'	0.3	32.9	0.3	32.9	21.8	21.8
Capitalized interest	'	0	1.6	0	1.6	1.6	1.6
Acquisition of property in accounts payable and other liabilities	'	15.7	26.4	15.7	26.4	30.2	30.2
Assumed liabilities in buyout of other financing obligation lease	'	0	0	0	0	0.2	0.2
Contribution receivable from Parent related to transaction-related compensation	'	19.6	0	19.6	0	0	0
Dividends payable	'	0	0	0	0	10.4	10.4
Deferred IPO costs	'	1.7	0	'	'	0	'
Deferred IPO costs reclassified to additional paid in capital	'	0	0	1.7	0	9.5	1.3
Non-cash distributions to CyrusOne Inc.	'	'	'	$0	$0	'	$2.40

Description_of_Business

Description of Business	9 Months Ended
	Sep. 30, 2013
Description Of Business [Line Items]	'
Description of Business	'
	Description of Business
	CyrusOne Inc., together with CyrusOne GP, a wholly-owned subsidiary of CyrusOne Inc., through which CyrusOne Inc. holds a controlling interest in CyrusOne LP (the “Operating Partnership”) and the subsidiaries of the Operating Partnership (collectively, “CyrusOne”, “we”, “us”, “our”, and the “Company”) is an owner, operator and developer of enterprise-class, carrier neutral data centers. Our customers operate in a number of industries, including energy, oil and gas, mining, medical, technology, finance and consumer goods and services. We currently operate 25 data centers located in the United States, United Kingdom and Singapore.
	CyrusOne’s operations are primarily conducted through the Operating Partnership. CyrusOne intends to elect the status of and qualify as a REIT under the Internal Revenue Code of 1986 (“the Code”), as amended, for the taxable year ended December 31, 2013.
CyrusOne L.P. [Member]	'
Description Of Business [Line Items]	'
Description of Business	'
	Description of Business
	CyrusOne Inc., together with CyrusOne GP, a wholly-owned subsidiary of CyrusOne Inc., holds a controlling interest in CyrusOne LP (the “Operating Partnership”) and the subsidiaries of the Operating Partnership (collectively, “CyrusOne”, “we”, “us”, “our”, and the “Company”) and is an owner, operator and developer of enterprise-class, carrier neutral data centers. Our customers operate in a number of industries, including energy, oil and gas, mining, medical, technology, finance and consumer goods and services. We currently operate 25 data centers located in the United States, United Kingdom and Singapore.
	CyrusOne’s operations are primarily conducted through the Operating Partnership.

Formation

Formation	9 Months Ended
	Sep. 30, 2013
Business Formation [Line Items]	'
Formation	'
	Formation
	Prior to November 20, 2012, the Company was a wholly-owned subsidiary of Cincinnati Bell Inc. (“CBI”). In anticipation of the initial public offering of CyrusOne Inc., CBI created CyrusOne Inc., CyrusOne GP and the Operating Partnership as legal entities and wholly-owned subsidiaries of CBI.
	On November 20, 2012, the Operating Partnership received a contribution of interests in real estate properties and the assumption of debt and other specified liabilities from CBI in exchange for the issuance of 123,688,687 operating partnership units to CBI.
	On January 24, 2013, CyrusOne Inc. completed its initial public offering (“IPO”) of common stock, issuing approximately 19.0 million shares for $337.1 million, net of underwriters' discounts. At that time the Operating Partnership executed a 2.8 to 1.0 reverse unit split, resulting in CBI owning 44.1 million Operating Partnership units. In addition, CBI exchanged approximately 1.5 million of its Operating Partnership units for 1.5 million shares of CyrusOne Inc. common stock, and CBI was issued 0.4 million shares of CyrusOne Inc. common stock in repayment for transaction costs paid by CBI. CyrusOne Inc. also issued approximately 1.0 million shares of restricted stock to its directors and employees. In addition, on January 24, 2013, CyrusOne Inc., together with CyrusOne GP, purchased approximately 21.9 million or 33.9% of the Operating Partnership’s units for $337.1 million and through CyrusOne GP assumed the controlling interest in the Operating Partnership. CBI retained a noncontrolling interest in the Operating Partnership of 66.1%.
	As of September 30, 2013 the total number of outstanding partnership units was 64.7 million and CBI holds a 65.8% ownership in the Operating Partnership.
CyrusOne L.P. [Member]	'
Business Formation [Line Items]	'
Formation	'
	Formation
	Prior to November 20, 2012, the Company was a wholly-owned subsidiary of Cincinnati Bell Inc. (“CBI”). In anticipation of the initial public offering of CyrusOne Inc., CBI created CyrusOne Inc., CyrusOne GP and the Operating Partnership as legal entities and wholly-owned subsidiaries of CBI.
	On November 20, 2012, the Operating Partnership received a contribution of interests in real estate properties and the assumption of debt and other specified liabilities from CBI in exchange for the issuance of 123,688,687 operating partnership units to CBI.
	On January 24, 2013, CyrusOne Inc. completed its initial public offering (“IPO”) of common stock, issuing approximately 19.0 million shares for $337.1 million, net of underwriters' discounts. At that time the Operating Partnership executed a 2.8 to 1.0 reverse unit split, resulting in CBI owning 44.1 million Operating Partnership units. In addition, CBI exchanged approximately 1.5 million of its Operating Partnership units for 1.5 million shares of CyrusOne Inc. common stock, and CBI was issued 0.4 million shares of CyrusOne Inc. common stock in repayment for transaction costs paid by CBI. CyrusOne Inc. also issued approximately 1.0 million shares of restricted stock to its directors and employees. In addition, on January 24, 2013, CyrusOne Inc., together with CyrusOne GP, purchased approximately 21.9 million or 33.9% of the Operating Partnership’s units for $337.1 million and through CyrusOne GP assumed the controlling interest in the Operating Partnership. CBI retained a noncontrolling interest in the Operating Partnership of 66.1%.
	As of September 30, 2013 the total number of outstanding partnership units was 64.7 million and CBI holds a 65.8% ownership in the Operating Partnership.

Basis_of_Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2013
Basis of Presentation [Line Items]	'
Basis of Presentation	'
	Basis of Presentation
	The accompanying condensed consolidated financial statements as of December 31, 2012, and for the periods ended January 23, 2013, and September 30, 2012, were prepared using CBI’s historical basis in the assets and liabilities of its data center business. The condensed consolidated financial statements include all revenues, costs, assets and liabilities directly attributable to the data center business. In addition, certain expenses reflected in the condensed consolidated financial statements include allocations of corporate expenses from CBI, which in the opinion of management are reasonable (see further discussion at Note 12) but do not necessarily reflect what CyrusOne’s financial position, results of operations and cash flows would have been had CyrusOne been a stand-alone company during these respective periods. As a result, historical financial information is not necessarily indicative of CyrusOne’s future results of operations, financial position and cash flows. For the period prior to the effective date of the IPO, January 24, 2013, the financial statements are deemed to be the financial statements of the “Predecessor” company and for the periods subsequent to January 24, 2013, the financial statements are deemed to be the financial statements of the “Successor” company. The financial statements for the Predecessor periods are considered combined and the financial statements for the Successor periods are considered consolidated.
	In addition, the accompanying financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and should be read in conjunction with the financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2012, which was filed with the Securities and Exchange Commission (“SEC”) on March 29, 2013. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been omitted from this report on Form 10-Q pursuant to the rules and regulations of the SEC.
	In addition, the accompanying condensed consolidated balance sheets reflects a reclassification of certain financial statement accounts. We have combined 'other liabilities' with 'accounts payable and accrued expenses' as of September 30, 2013, and December 31, 2012. We believe combining them more accurately reflects the nature of these accounts.
	It should also be noted that the results for the interim periods shown in this report are not necessarily indicative of future financial results and have not been audited by our independent registered public accounting firm. In the opinion of management, the accompanying unaudited condensed consolidated financial statements include all adjustments necessary to present fairly our financial position as of September 30, 2013, and our results of operations, for the three months ended September 30, 2013, the periods ended September 30, 2013 (January 24, 2013 to September 30, 2013), January 23, 2013 (January 1, 2013 to January 23, 2013), and the three and nine months ended September 30, 2012, and the statements of cash flows for the period ended September 30, 2013 (January 24, 2013 to September 30, 2013), January 23, 2013 (January 1, 2013 to January 23, 2013), and nine months ended September 30, 2012. These adjustments are of a normal recurring nature and consistent with the adjustments recorded to prepare the annual audited financial statements as of December 31, 2012.
CyrusOne L.P. [Member]	'
Basis of Presentation [Line Items]	'
Basis of Presentation	'
	Basis of Presentation
	The accompanying condensed consolidated financial statements as of December 31, 2012 and for the periods ended January 23, 2013 and September 30, 2012, were prepared using CBI’s historical basis in the assets and liabilities of its data center business. The condensed consolidated financial statements include all revenues, costs, assets and liabilities directly attributable to the data center business. In addition, certain expenses reflected in the condensed consolidated financial statements include allocations of corporate expenses from CBI, which in the opinion of management are reasonable (see further discussion at Note 10) but do not necessarily reflect what the Operating Partnership's financial position, results of operations and cash flows would have been had the Operating Partnership been a stand-alone company during these respective periods. As a result, historical financial information is not necessarily indicative of the Operating Partnership's future results of operations, financial position and cash flows. For the period prior to the effective date of CyrusOne Inc.'s IPO, January 24, 2013, the financial statements are deemed to be the financial statements of the “Predecessor” company and for the periods subsequent to January 24, 2013, the financial statements are deemed to be the financial statements of the “Successor” company. The financial statements for the Predecessor periods are considered combined and the financial statements for the Successor periods are considered consolidated.
	In addition, the accompanying financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and should be read in conjunction with the financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2012, which was filed with the Securities and Exchange Commission (“SEC”) on March 29, 2013. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been omitted from this report on Form 10-Q pursuant to the rules and regulations of the SEC.
	In addition, the accompanying condensed consolidated balance sheets reflects a reclassification of certain financial statement accounts. We have combined 'other liabilities' with 'accounts payable and accrued expenses' as of September 30, 2013, and December 31, 2012. We believe combining them more accurately reflects the nature of these accounts.
	It should also be noted that the results for the interim periods shown in this report are not necessarily indicative of future financial results and have not been audited by our independent registered public accounting firm. In the opinion of management, the accompanying unaudited condensed consolidated financial statements include all adjustments necessary to present fairly our financial position as of September 30, 2013, and our results of operations, for the three months ended September 30, 2013, the periods ended September 30, 2013 (January 24, 2013 to September 30, 2013), January 23, 2013 (January 1, 2013 to January 23, 2013), and the three and nine months ended September 30, 2012, and the statements of cash flows for the period ended September 30, 2013 (January 24, 2013 to September 30, 2013), January 23, 2013 (January 1, 2013 to January 23, 2013), and nine months ended September 30, 2012. These adjustments are of a normal recurring nature and consistent with the adjustments recorded to prepare the annual audited financial statements as of December 31, 2012.

Significant_Accounting_Policie

Significant Accounting Policies	9 Months Ended
	Sep. 30, 2013
Summary Of Significant Accounting Policies [Line Items]	'
Significant Accounting Policies	'
	Significant Accounting Policies
	Use of Estimates—Preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. These estimates and assumptions are based on management’s knowledge of current events and actions that we may undertake in the future. Estimates are used in determining the fair value of leased real estate, the useful lives of real estate and other long-lived assets, future cash flows associated with goodwill and other long-lived asset impairment testing, deferred tax assets and liabilities and loss contingencies. Estimates were also utilized in the determination of historical allocations of shared employees’ payroll, benefits and incentives and management fees. Actual results may differ from these estimates and assumptions.
	Investments in Real Estate—Investments in real estate consist of land, buildings, improvements and integral equipment utilized in our data center operations. Real estate acquired from third parties has been recorded at its acquisition cost. Real estate acquired from CBI and its affiliates has been recorded at its historical cost basis. Additions and improvements which extend an asset’s useful life or increase its functionality are capitalized and depreciated over the asset’s remaining life. Maintenance and repairs are expensed as incurred.
	When we are involved in the construction of structural improvements to leased property, we are deemed the accounting owner of the leased real estate. In these instances, we bear substantially all the construction period risk, including managing or funding construction. These transactions generally do not qualify for sale-leaseback accounting due to our continued involvement in these data center operations. At inception, the fair value of the real estate, which generally consists of a building shell, and our associated obligation is recorded as construction in progress. As construction progresses, the value of the asset and obligation increases by the fair value of the structural improvements. When construction is complete, the asset is placed in service and depreciation commences. Leased real estate is depreciated to the lesser of (i) its estimated fair value at the end of the term or (ii) the expected amount of the unamortized obligation at the end of the term. The associated obligation is presented as other financing arrangements in the accompanying condensed consolidated balance sheets.
	When we are not deemed the accounting owner, we further evaluate leased real estate to determine whether the lease should be classified as a capital or operating lease. One of the following four characteristics must be present to classify a lease as a capital lease: (i) the lease transfers ownership of the property to the lessee by the end of the lease term, (ii) the lease contains a bargain purchase option, (iii) the lease term is equal to 75% or more of the estimated economic life of the leased property or (iv) the net present value of the lease payments are at least 90% of the fair value of the leased property.
	Construction in progress includes direct and indirect expenditures for the construction and expansion of our data centers and is stated at its acquisition cost. Independent contractors perform substantially all of the construction and expansion efforts of our data centers. Construction in progress includes costs incurred under construction contracts including project management services, engineering and schematic design services, design development, construction services and other construction-related fees and services. Interest, property taxes and certain labor costs are also capitalized during the construction of an asset.
	Cash and Cash Equivalents—Cash and cash equivalents include all non-restricted cash held in financial institutions and other non-restricted highly liquid short-term investments with original maturities at acquisition of three months or less.
	Restricted Cash—Restricted cash consists of funds held in escrow to fund construction.
	Goodwill—Goodwill represents the excess of the purchase price over the fair value of net assets acquired in connection with business acquisitions. We perform impairment testing of goodwill, at the reporting unit level, on an annual basis or more frequently if indicators of potential impairment exist.
	The fair value of our reporting unit was determined using a combination of market-based valuation multiples for comparable businesses and discounted cash flow analysis based on internal financial forecasts incorporating market participant assumptions. There were no impairments recognized for any of the periods presented.
	Long-Lived and Intangible Assets—Intangible assets represent purchased assets that lack physical substance, but can be separately distinguished from goodwill because of contractual or other legal rights or because the asset is capable of being sold or exchanged, either on its own or in combinations with a related contract, asset, or liability. Intangible assets with finite lives consist of trademarks, customer relationships, and a favorable leasehold interest.
	Management reviews the carrying value of long-lived assets, including intangible assets with finite lives, when events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. Examples of such indicators may include a significant adverse change in the extent to which or manner in which the property is being used, an accumulation of costs significantly in excess of the amount originally expected for acquisition or development, or a history of operating or cash flow losses. When such indicators exist, we review an estimate of the undiscounted future cash flows expected to result from the use of an asset (or group of assets) and its eventual disposition and compare such amount to its carrying amount. We consider factors such as future operating income, leasing demand, competition and other factors. If our undiscounted net cash flows indicate that we are unable to recover the carrying value of the asset, an impairment loss is recognized. An impairment loss is measured as the amount by which the asset’s carrying value exceeds its estimated fair value. There was an impairment of $13.3 million recognized for the nine months ended September 30, 2012, and no impairments recognized for any of the periods presented in 2013.
	Deferred Costs—Deferred costs include both deferred leasing costs and deferred financing costs. Deferred costs are presented with other assets in the accompanying condensed consolidated balance sheets. Leasing commissions incurred at the commencement of a new lease are capitalized and amortized over the term of the customer lease. Amortization of deferred leasing costs is presented with depreciation and amortization in the accompanying condensed consolidated statements of operations. If a lease terminates prior to the expected term of the lease, the remaining unamortized cost is written off to amortization expense.
	Deferred financing costs include costs incurred in connection with issuance of debt and the revolving credit agreement. These financing costs are capitalized and amortized over the term of the debt or revolving credit agreement and are included as a component of interest expense.
	Other Financing Arrangements—Other financing arrangements represent leases of real estate where we are involved in the construction of structural improvements to develop buildings into data centers. When we bear substantially all the construction period risk, such as managing or funding construction, we are deemed to be the accounting owner of the leased property and, at the lease inception date, we are required to record at fair value the property and associated liability on our condensed consolidated balance sheet. These transactions generally do not qualify for sale-leaseback accounting due to our continued involvement in these data center operations.
	Revenue Recognition—Colocation rentals are generally billed monthly in advance, and some contracts have escalating payments over the term of the contract. If rents escalate without the lessee gaining access to or control over additional leased space or power, and the lessee takes possession of, or controls the physical use of the property (including all contractually committed power) at the beginning of the lease term, the rental payments by the lessee are recognized as revenue on a straight-line basis over the term of the lease. If rents escalate because the lessee gains access to and control over additional leased space or power, revenue is recognized in proportion to the additional space or power in the years that the lessee has control over the use of the additional space or power. The excess of revenue recognized over amounts contractually due is recognized in other assets in the accompanying condensed consolidated balance sheets.
	Some of our leases are structured on a full-service gross basis in which the customer pays a fixed amount for both colocation rental and power. Other leases provide that the customer will be billed for power based upon actual usage which is separately metered. In both cases, this revenue is presented on a gross basis in the accompanying condensed consolidated statements of operations. Power is generally billed one month in arrears, and an estimate of this revenue is accrued in the month that the associated costs are incurred. We generally are not entitled to reimbursements for real estate taxes, insurance or other operating expenses.
	Revenue is recognized for services or products that are deemed separate units of accounting. When a customer makes an advance payment, which is not deemed a separate unit of accounting, deferred revenue is recorded. This revenue is recognized ratably over the expected term of the lease, unless the pattern of service suggests otherwise.
	Certain customer contracts require specified levels of service or performance. If we fail to meet these service levels, our customers may be eligible to receive credits on their contractual billings. These credits are recognized against revenue when an event occurs that gives rise to such credits.
	Property Operating Expenses—Property operating expenses generally consist of electricity, salaries and benefits of data center operations personnel, real estate taxes, security, rent, insurance and other site operating and maintenance costs.
	Sales and Marketing Expense—Sales and marketing expense is comprised of compensation and benefits associated with sales and marketing personnel as well as advertising and marketing costs.
	General and Administrative Expense—General and administrative expense is comprised of salaries and benefits of senior employees and support functions, such as legal, accounting, and professional service fees.
	Depreciation and Amortization Expense—Depreciation expense is recognized over the estimated useful lives of real estate applying the straight-line method. The useful life of leased real estate and leasehold improvements is the lesser of the economic useful life of the asset or the term of the lease, including optional renewal periods if renewal of the lease is reasonably assured. The residual value of leased real estate is estimated as the lesser of (i) the expected fair value of the asset at the end of the lease term or (ii) the expected amount of the unamortized liability at the end of the lease term. Estimated useful lives are periodically reviewed.
	Amortization expense is recognized over the estimated useful lives of finite-lived intangibles. An accelerated method of amortization is utilized to amortize our customer relationship intangible, consistent with the benefit expected to be derived from this asset. We amortize trademarks, favorable leasehold interests and deferred leasing costs over their estimated useful lives. The estimated useful life of trademarks and customer relationships is eight to 15 years. In addition, we have a favorable leasehold interest related to a land lease that is being amortized over the remaining lease term of 56 years.
	Restructuring Charge—Restructuring charges are a result of programs planned and controlled by management that materially changes either the scope of business undertaken or the manner in which that business is conducted. Current restructuring charges were the result of moving certain administrative functions to the Company's corporate office. These charges are generally recognized in the period in which the liability is incurred.
	Transaction-Related Compensation —During the period ended January 23, 2013, the Company received an allocated compensation charge from CBI of $20.0 million for the settlement of its long-term incentive plan associated with the completion of the IPO. The amount was determined by CBI and allocated to CyrusOne Inc. on January 23, 2013, and reflected as expense and contributed capital in the respective period.
	Transaction Costs—Transaction costs represent legal, accounting and professional fees incurred in connection with the formation transactions, our qualification as a REIT, completed and potential business combinations, and costs incurred to pursue additional property purchases. Transaction costs are expensed as incurred.
	Income Taxes—The Company was included in CBI’s consolidated tax returns in various jurisdictions for all Predecessor periods. In the accompanying financial statements, the Predecessor periods reflect income taxes as if the Company was a separate stand-alone company. The income tax provision consists of an amount for taxes currently payable and an amount for tax consequences deferred to future periods.
	CyrusOne Inc. will elect to be taxed as a REIT under the Code, as amended, commencing with our taxable year ending December 31, 2013. Provided we qualify for taxation as a REIT and continue to meet the various qualification tests mandated under the Code, we are generally not subject to corporate level federal income tax on the earnings distributed currently to our shareholders. If we fail to qualify as a REIT in any taxable year, our taxable income will be subject to federal income tax at regular corporate rates and any applicable alternative minimum tax.
	While CyrusOne Inc. and the Operating Partnership do not pay federal income taxes, we are still subject to foreign, state and local income taxes in the locations in which it conducts business. Our taxable REIT subsidiaries (each a “TRS”) are also subject to federal and state income taxes to the extent there is taxable income.
	Deferred income taxes are recognized in certain entities. Deferred income taxes are provided for temporary differences in the bases between financial statement and income tax assets and liabilities. Deferred income taxes are recalculated annually at rates then in effect. Valuation allowances are recorded to reduce deferred tax assets to amounts that are more likely than not to be realized. The ultimate realization of the deferred tax assets depends upon our ability to generate future taxable income during the periods in which basis differences and other deductions become deductible and prior to the expiration of the net operating loss carryforwards.
	The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction as well as various foreign, state and local jurisdictions.  The Company's previous tax filings are subject to normal reviews by regulatory agencies until the related statute of limitations expires.  With a few exceptions, the Company is no longer subject to U. S. federal, state or local examinations for years prior to 2009.
	Foreign Currency Translation and Transactions—The financial position of foreign subsidiaries is translated at the exchange rates in effect at the end of the period, while revenues and expenses are translated at average rates of exchange during the period. Gains or losses from translation of foreign operations where the local currency is the functional currency are included as components of other comprehensive loss. Gains or losses from foreign currency transactions are included in determining net income. Gains and losses from translation and foreign currency transactions were immaterial for all periods presented.
	Comprehensive Income (Loss)—Comprehensive income (loss) represents the change in net assets of a company from transactions and other events from non-owner sources. Comprehensive income (loss) comprises all components of net income and all components of other comprehensive income. As components of other comprehensive income (loss) were immaterial for all periods presented, comprehensive income (loss) is not presented.
	Stock-Based Compensation—For all the Predecessor periods presented, some of our employees participated in CBI’s stock-based compensation plans. CBI valued all share-based payments to employees at fair value on the date of grant and expensed this amount over the applicable vesting period. The fair value of stock options and stock appreciation rights was determined using the Black-Scholes option-pricing model using assumptions such as volatility, risk-free interest rate, holding period and expected dividends. The fair value of stock awards was based upon the closing market price of CBI’s common stock on the date of grant. For all share-based awards, a forfeiture rate was estimated based upon historical forfeiture patterns. The forfeiture rate reduced the total fair value of the awards that was recognized as compensation expense. For graded vesting awards, CBI’s policy was to recognize compensation expense on a straight-line basis over the vesting period. Certain employees were granted awards, which were indexed to the change in CBI’s common stock price. The accompanying condensed consolidated financial statements include an allocation of stock-based compensation costs for awards granted to our employees. Upon completion of the IPO, all awards were either terminated and settled by CBI with each respective employee or vesting was accelerated.
	In conjunction with the IPO, our Board of Directors adopted the 2012 Long-Term Incentive Plan (“LTIP”). See further discussion in Note 10.
	Fair Value Measurements—Fair value measurements are utilized in accounting for business combinations and testing of goodwill and other long-lived assets for impairment and disclosures. Fair value of financial and non-financial assets and liabilities is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. The three-tier hierarchy for inputs used in measuring fair value, which prioritizes the inputs used in the methodologies of measuring fair value for assets and liabilities, is as follows:
	Level 1—Observable inputs for identical instruments such as quoted market prices;
	Level 2—Inputs include quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (i.e., interest rates, yield curves, etc.), and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs); and
	Level 3—Unobservable inputs that reflect our determination of assumptions that market participants would use in pricing the asset or liability. These inputs are developed based on the best information available, including our own data.
	Business Segments—Business segments are components of an enterprise for which separate financial information is available and regularly viewed by the chief operating decision maker to assess performance and allocate resources. Our chief operating decision maker reviews our financial information on an aggregate basis. Furthermore, our data centers have similar economic characteristics and customers across all geographic locations, our service offerings have similar production processes, deliver services in a similar manner and use the same types of facilities and similar technologies. As a result, we have concluded that we have one reportable business segment.
	Earnings Per Share—For all periods subsequent to January 23, 2013, we present earnings per share (“EPS”) data. Basic EPS includes only the weighted average number of common shares outstanding during the period. Diluted EPS includes the weighted average number of common shares and the dilutive effect of stock options, restricted stock and share unit awards and convertible subordinated notes outstanding during the period, when such instruments are dilutive.
	All outstanding unvested share-based payment awards that contain rights to nonforfeitable dividends are treated as participating in undistributed earnings with common shareholders. Awards of this nature are considered participating securities and the two-class method of computing basic and diluted EPS must be applied.
	Accounting Standards to be Adopted in Future Periods—In February, 2013, the Financial Accounting Standards Board ("FASB") issued amendments to provide guidance on the recognition, measurement and disclosure of obligations resulting from joint and several liability arrangements for which the total amount of obligation within the scope of this guidance is fixed at the reporting date, except for obligations addressed within existing guidance in GAAP. The amendments are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The Company does not believe the adoption of this guidance will have a material impact on the Company’s financial statements.
CyrusOne L.P. [Member]	'
Summary Of Significant Accounting Policies [Line Items]	'
Significant Accounting Policies	'
	Significant Accounting Policies
	Use of Estimates—Preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. These estimates and assumptions are based on management’s knowledge of current events and actions that we may undertake in the future. Estimates are used in determining the fair value of leased real estate, the useful lives of real estate and other long-lived assets, future cash flows associated with goodwill and other long-lived asset impairment testing, deferred tax assets and liabilities and loss contingencies. Estimates were also utilized in the determination of historical allocations of shared employees’ payroll, benefits and incentives and management fees. Actual results may differ from these estimates and assumptions.
	Investments in Real Estate—Investments in real estate consist of land, buildings, improvements and integral equipment utilized in our data center operations. Real estate acquired from third parties has been recorded at its acquisition cost. Real estate acquired from CBI and its affiliates has been recorded at its historical cost basis. Additions and improvements which extend an asset’s useful life or increase its functionality are capitalized and depreciated over the asset’s remaining life. Maintenance and repairs are expensed as incurred.
	When we are involved in the construction of structural improvements to leased property, we are deemed the accounting owner of the leased real estate. In these instances, we bear substantially all the construction period risk, including managing or funding construction. These transactions generally do not qualify for sale-leaseback accounting due to our continued involvement in these data center operations. At inception, the fair value of the real estate, which generally consists of a building shell, and our associated obligation is recorded as construction in progress. As construction progresses, the value of the asset and obligation increases by the fair value of the structural improvements. When construction is complete, the asset is placed in service and depreciation commences. Leased real estate is depreciated to the lesser of (i) its estimated fair value at the end of the term or (ii) the expected amount of the unamortized obligation at the end of the term. The associated obligation is presented as other financing arrangements in the accompanying condensed consolidated balance sheets.
	When we are not deemed the accounting owner, we further evaluate leased real estate to determine whether the lease should be classified as a capital or operating lease. One of the following four characteristics must be present to classify a lease as a capital lease: (i) the lease transfers ownership of the property to the lessee by the end of the lease term, (ii) the lease contains a bargain purchase option, (iii) the lease term is equal to 75% or more of the estimated economic life of the leased property or (iv) the net present value of the lease payments are at least 90% of the fair value of the leased property.
	Construction in progress includes direct and indirect expenditures for the construction and expansion of our data centers and is stated at its acquisition cost. Independent contractors perform substantially all of the construction and expansion efforts of our data centers. Construction in progress includes costs incurred under construction contracts including project management services, engineering and schematic design services, design development, construction services and other construction-related fees and services. Interest, property taxes and certain labor costs are also capitalized during the construction of an asset.
	Cash and Cash Equivalents—Cash and cash equivalents include all non-restricted cash held in financial institutions and other non-restricted highly liquid short-term investments with original maturities at acquisition of three months or less.
	Restricted Cash—Restricted cash consists of funds held in escrow to fund construction.
	Goodwill—Goodwill represents the excess of the purchase price over the fair value of net assets acquired in connection with business acquisitions. We perform impairment testing of goodwill, at the reporting unit level, on an annual basis or more frequently if indicators of potential impairment exist.
	The fair value of our reporting unit was determined using a combination of market-based valuation multiples for comparable businesses and discounted cash flow analysis based on internal financial forecasts incorporating market participant assumptions. There were no impairments recognized for any of the periods presented.
	Long-Lived and Intangible Assets—Intangible assets represent purchased assets that lack physical substance, but can be separately distinguished from goodwill because of contractual or other legal rights or because the asset is capable of being sold or exchanged, either on its own or in combinations with a related contract, asset, or liability. Intangible assets with finite lives consist of trademarks, customer relationships, and a favorable leasehold interest.
	Management reviews the carrying value of long-lived assets, including intangible assets with finite lives, when events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. Examples of such indicators may include a significant adverse change in the extent to which or manner in which the property is being used, an accumulation of costs significantly in excess of the amount originally expected for acquisition or development, or a history of operating or cash flow losses. When such indicators exist, we review an estimate of the undiscounted future cash flows expected to result from the use of an asset (or group of assets) and its eventual disposition and compare such amount to its carrying amount. We consider factors such as future operating income, leasing demand, competition and other factors. If our undiscounted net cash flows indicate that we are unable to recover the carrying value of the asset, an impairment loss is recognized. An impairment loss is measured as the amount by which the asset’s carrying value exceeds its estimated fair value. There was an impairment of $13.3 million recognized for the nine months ended September 30, 2012, and no impairments recognized for any of the periods presented in 2013.
	Deferred Costs—Deferred costs include both deferred leasing costs and deferred financing costs. Deferred costs are presented with other assets in the accompanying condensed consolidated balance sheets. Leasing commissions incurred at the commencement of a new lease are capitalized and amortized over the term of the customer lease. Amortization of deferred leasing costs is presented with depreciation and amortization in the accompanying condensed consolidated statements of operations. If a lease terminates prior to the expected term of the lease, the remaining unamortized cost is written off to amortization expense.
	Deferred financing costs include costs incurred in connection with issuance of debt and the revolving credit agreement. These financing costs are capitalized and amortized over the term of the debt or revolving credit agreement and are included as a component of interest expense.
	Other Financing Arrangements—Other financing arrangements represent leases of real estate where we are involved in the construction of structural improvements to develop buildings into data centers. When we bear substantially all the construction period risk, such as managing or funding construction, we are deemed to be the accounting owner of the leased property and, at the lease inception date, we are required to record at fair value the property and associated liability on our condensed consolidated balance sheet. These transactions generally do not qualify for sale-leaseback accounting due to our continued involvement in these data center operations.
	Revenue Recognition—Colocation rentals are generally billed monthly in advance, and some contracts have escalating payments over the term of the contract. If rents escalate without the lessee gaining access to or control over additional leased space or power, and the lessee takes possession of, or controls the physical use of the property (including all contractually committed power) at the beginning of the lease term, the rental payments by the lessee are recognized as revenue on a straight-line basis over the term of the lease. If rents escalate because the lessee gains access to and control over additional leased space or power, revenue is recognized in proportion to the additional space or power in the years that the lessee has control over the use of the additional space or power. The excess of revenue recognized over amounts contractually due is recognized in other assets in the accompanying condensed consolidated balance sheets.
	Some of our leases are structured on a full-service gross basis in which the customer pays a fixed amount for both colocation rental and power. Other leases provide that the customer will be billed for power based upon actual usage which is separately metered. In both cases, this revenue is presented on a gross basis in the accompanying condensed consolidated statements of operations. Power is generally billed one month in arrears, and an estimate of this revenue is accrued in the month that the associated costs are incurred. We generally are not entitled to reimbursements for real estate taxes, insurance or other operating expenses.
	Revenue is recognized for services or products that are deemed separate units of accounting. When a customer makes an advance payment, which is not deemed a separate unit of accounting, deferred revenue is recorded. This revenue is recognized ratably over the expected term of the lease, unless the pattern of service suggests otherwise.
	Certain customer contracts require specified levels of service or performance. If we fail to meet these service levels, our customers may be eligible to receive credits on their contractual billings. These credits are recognized against revenue when an event occurs that gives rise to such credits.
	Property Operating Expenses—Property operating expenses generally consist of electricity, salaries and benefits of data center operations personnel, real estate taxes, security, rent, insurance and other site operating and maintenance costs.
	Sales and Marketing Expense—Sales and marketing expense is comprised of compensation and benefits associated with sales and marketing personnel as well as advertising and marketing costs.
	General and Administrative Expense—General and administrative expense is comprised of salaries and benefits of senior employees and support functions, such as legal, accounting, and professional service fees.
	Depreciation and Amortization Expense—Depreciation expense is recognized over the estimated useful lives of real estate applying the straight-line method. The useful life of leased real estate and leasehold improvements is the lesser of the economic useful life of the asset or the term of the lease, including optional renewal periods if renewal of the lease is reasonably assured. The residual value of leased real estate is estimated as the lesser of (i) the expected fair value of the asset at the end of the lease term or (ii) the expected amount of the unamortized liability at the end of the lease term. Estimated useful lives are periodically reviewed.
	Amortization expense is recognized over the estimated useful lives of finite-lived intangibles. An accelerated method of amortization is utilized to amortize our customer relationship intangible, consistent with the benefit expected to be derived from this asset. We amortize trademarks, favorable leasehold interests and deferred leasing costs over their estimated useful lives. The estimated useful life of trademarks and customer relationships is eight to 15 years. In addition, we have a favorable leasehold interest related to a land lease that is being amortized over the remaining lease term of 56 years.
	Restructuring Charge—Restructuring charges are a result of programs planned and controlled by management that materially changes either the scope of business undertaken or the manner in which that business is conducted. Current restructuring charges were the result of moving certain administrative functions to the Company's corporate office. These charges are generally recognized in the period in which the liability is incurred.
	Transaction-Related Compensation—During the period ended January 23, 2013, the Company received an allocated compensation charge from CBI of $20.0 million for the settlement of its long-term incentive plan associated with the completion of the IPO. The amount was determined by CBI and allocated to the Operating Partnership on January 23, 2013 and reflected as expense and contributed capital in the respective period.
	Transaction Costs—Transaction costs represent legal, accounting and professional fees incurred in connection with the formation transactions, potential business combinations, and costs incurred to pursue additional property purchases. Transaction costs are expensed as incurred.
	Income Taxes—Various wholly-owned subsidiaries of the Company were included in CBI’s consolidated tax returns in various jurisdictions for all Predecessor periods. In the accompanying financial statements, the Predecessor periods reflect income taxes as if the Company was a separate stand-alone company. The income tax provision consists of an amount for taxes currently payable and an amount for tax consequences deferred to future periods.
	Deferred income taxes are recognized in certain entities. Deferred income taxes are provided for temporary differences in the bases between financial statement and income tax assets and liabilities. Deferred income taxes are recalculated annually at rates then in effect. Valuation allowances are recorded to reduce deferred tax assets to amounts that are more likely than not to be realized. The ultimate realization of the deferred tax assets depends upon our ability to generate future taxable income during the periods in which basis differences and other deductions become deductible and prior to the expiration of the net operating loss carryforwards.
	The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction as well as various foreign, state and local jurisdictions.  The Company's previous tax filings are subject to normal reviews by regulatory agencies until the related statute of limitations expires.  With a few exceptions, the Company is no longer subject to U. S. federal, state or local examinations for years prior to 2009.
	Foreign Currency Translation and Transactions—The financial position of foreign subsidiaries is translated at the exchange rates in effect at the end of the period, while revenues and expenses are translated at average rates of exchange during the period. Gains or losses from translation of foreign operations where the local currency is the functional currency are included as components of other comprehensive loss. Gains or losses from foreign currency transactions are included in determining net income. Gains and losses from translation and foreign currency transactions were immaterial for all periods presented.
	Comprehensive Loss—Comprehensive income (loss) represents the change in net assets of a company from transactions and other events from non-owner sources. Comprehensive income (loss) comprises all components of net income and all components of other comprehensive income. As components of other comprehensive income (loss) were immaterial for all periods presented, comprehensive income (loss) is not presented.
	Stock-Based Compensation—For all the Predecessor periods presented, some of our employees participated in CBI’s stock-based compensation plans. CBI valued all share-based payments to employees at fair value on the date of grant and expensed this amount over the applicable vesting period. The fair value of stock options and stock appreciation rights was determined using the Black-Scholes option-pricing model using assumptions such as volatility, risk-free interest rate, holding period and expected dividends. The fair value of stock awards was based upon the closing market price of CBI’s common stock on the date of grant. For all share-based awards, a forfeiture rate was estimated based upon historical forfeiture patterns. The forfeiture rate reduced the total fair value of the awards that was recognized as compensation expense. For graded vesting awards, CBI’s policy was to recognize compensation expense on a straight-line basis over the vesting period. Certain employees were granted awards, which were indexed to the change in CBI’s common stock price. The accompanying condensed consolidated financial statements include an allocation of stock-based compensation costs for awards granted to our employees. Upon completion of CyrusOne Inc.'s IPO, all awards were either terminated and settled by CBI with each respective employee or vesting was accelerated.
	In conjunction with CyrusOne Inc.'s IPO, the Board of Directors of CyrusOne Inc. adopted the 2012 Long-Term Incentive Plan (“LTIP”). See further discussion in Note 9.
	Fair Value Measurements—Fair value measurements are utilized in accounting for business combinations and testing of goodwill and other long-lived assets for impairment. Fair value of financial and non-financial assets and liabilities is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. The three-tier hierarchy for inputs used in measuring fair value, which prioritizes the inputs used in the methodologies of measuring fair value for assets and liabilities, is as follows:
	Level 1—Observable inputs for identical instruments such as quoted market prices;
	Level 2—Inputs include quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (i.e., interest rates, yield curves, etc.), and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs); and
	Level 3—Unobservable inputs that reflect our determination of assumptions that market participants would use in pricing the asset or liability. These inputs are developed based on the best information available, including our own data.
	Business Segments—Business segments are components of an enterprise for which separate financial information is available and regularly viewed by the chief operating decision maker to assess performance and allocate resources. Our chief operating decision maker reviews our financial information on an aggregate basis. Furthermore, our data centers have similar economic characteristics and customers across all geographic locations, our service offerings have similar production processes, deliver services in a similar manner and use the same types of facilities and similar technologies. As a result, we have concluded that we have one reportable business segment.
	Accounting Standards to be Adopted in Future Periods—In February, 2013, the Financial Accounting Standards Board ("FASB") issued amendments to provide guidance on the recognition, measurement and disclosure of obligations resulting from joint and several liability arrangements for which the total amount of obligation within the scope of this guidance is fixed at the reporting date, except for obligations addressed within existing guidance in GAAP. The amendments are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The Company does not believe the adoption of this guidance will have a material impact on the Company’s financial statements.

Investment_in_Real_Estate

Investment in Real Estate	9 Months Ended
	Sep. 30, 2013
Real Estate Properties [Line Items]	'
Investment in Real Estate	'
	Investment in Real Estate
	A schedule of our gross investment in real estate follows:
		Successor						Predecessor
		September 30, 2013						December 31, 2012
	(dollars in millions)	Land		Building and		Equipment		Land		Building and		Equipment
				Improvements						Improvements
	West Seventh St., Cincinnati, OH (7th Street)	$	0.9	$	108.9	$	7.3	$	0.9	$	108.7	$	0.8
	Parkway Dr., Mason, OH (Mason)	—		20.3		0.5		—		20.2		0.4
	Industrial Rd., Florence, KY (Florence)	8.8		34.5		2.2		—		46.8		0.5
	Goldcoast Dr., Cincinnati, OH (Goldcoast)	0.6		6.7		0.1		0.6		6.7		—
	Knightsbridge Dr., Hamilton, OH (Hamilton)	—		49.2		3.5		—		49.9		2.1
	E. Monroe St., South Bend, IN (Monroe St.)	—		2.5		—		—		3.2		—
	Springer St., Lombard, IL (Lombard)	1.3		4		0.2		—		2.6		—
	Crescent Circle, South Bend, IN (Blackthorn)	—		3.4		0.1		—		3.3		0.1
	Kingsview Dr., Lebanon, OH (Lebanon)	4		71.4		1.7		4		71		1.1
	McAuley Place, Blue Ash, OH (Blue Ash)	—		0.6		—		—		0.6		—
	Westway Park Blvd., Houston, TX (Houston West 1)	1.4		88.4		21.4		3.3		87.8		12
	Westway Park Blvd., Houston, TX (Houston West 2)	2		20.9		14.5		—		—		—
	N. Sam Houston Pky., Houston, TX (Houston-MetroNational)	18.3		—		—		—		—		—
	Southwest Fwy., Houston, TX (Galleria)	—		68.7		12.1		—		66		6.6
	E. Ben White Blvd., Austin, TX (Austin 1)	—		22.5		1.1		—		22.6		0.8
	S. State Highway 121 Business, Lewisville, TX (Lewisville)	—		77		19.5		—		76		9.6
	Marsh Lane, Carrollton, TX	—		0.1		0.4		—		0.1		0.2
	Midway Rd., Carrollton, TX	—		2		0.4		—		2		0.3
	W. Frankford Rd., Carrollton, TX (Carrollton)	16.1		41.3		13.2		16.1		34.6		5
	Bryan St., Dallas, TX	—		0.1		0.1		—		0.1		—
	North Freeway, Houston, TX (Greenspoint)	—		1.3		0.4		—		1.3		0.4
	South Ellis Street, Chandler, AZ (Phoenix)	14.8		55.9		9.8		15		38.7		6.8
	Westover Hills Blvd., San Antonio, TX (San Antonio 1)	4.6		32		23.6		4.6		30.8		4.7
	Westover Hills Blvd., San Antonio, TX (San Antonio 2)	6.7		—		—		—		—		—
	Metropolis Dr., Austin, TX (Austin 2)	2		23		1.5		—		22.7		0.6
	Kestral Way (London)	—		34		0.6		—		17.1		0.3
	Jurong East (Singapore)	—		9.5		0.1		—		9.7		0.1
	Total	$	81.5	$	778.2	$	134.3	$	44.5	$	722.5	$	52.4
	Construction in progress was $63.2 million and $64.2 million as of September 30, 2013 and December 31, 2012, respectively. We continue to have high amounts of construction in progress as we continue to build data center facilities.
	In March 2013, we purchased a 33 acre parcel of land in the Houston West metro area adjacent to our existing Houston facilities for $18.2 million. We plan to develop this land in the future into data center space.
	On May 1, 2013, we executed our lease buyout option to purchase the Springer Street, Lombard, IL (Lombard) data center facility for a total purchase price of $5.5 million. The purchase price was used to settle the related capital lease obligation of $2.8 million and the excess purchase price of $2.7 million was allocated to the relative fair value of land and building.
	On May 3, 2013, we executed our lease buyout option to purchase the Industrial Road, Florence, KY (Florence) data center facility for a total purchase price of $10.5 million. The purchase price was used to settle the related capital lease obligation of $6.8 million and the excess purchase price of $3.7 million was allocated to the relative fair value of land and building.
	On June 18, 2013, we extinguished our Metropolis Drive, Austin, TX (Austin 2) data center facility related financing lease obligation for $12.2 million.  The extinguishment resulted in the settlement of the related financing lease obligation for Austin 2 of $8.9 million, acquisition of land of $2.0 million and a loss on extinguishment of debt of $1.3 million.
	On August 7, 2013, we acquired 22 acres of land for $6.7 million in San Antonio (San Antonio 2) for future data center expansions.
	Upon completion of the buyout of the Lombard and Florence capital leases, the gross basis of the acquired assets were reset to the net carrying value of the leased assets and the depreciable life was extended to 25 years consistent with our policy for depreciating buildings. The amount of these adjustments for Lombard and Florence were $0.1 million and $7.9 million, respectively.
	The allocated amounts related to the Lombard and Florence data center acquisitions represent a preliminary allocation of purchase price to the assets acquired and are subject to final fair value measurements.
CyrusOne L.P. [Member]	'
Real Estate Properties [Line Items]	'
Investment in Real Estate	'
	Investment in Real Estate
	A schedule of our gross investment in real estate follows:
		Successor						Predecessor
		September 30, 2013						December 31, 2012
	(dollars in millions)	Land		Building and		Equipment		Land		Building and		Equipment
				Improvements						Improvements
	West Seventh St., Cincinnati, OH (7th Street)	$	0.9	$	108.9	$	7.3	$	0.9	$	108.7	$	0.8
	Parkway Dr., Mason, OH (Mason)	—		20.3		0.5		—		20.2		0.4
	Industrial Rd., Florence, KY (Florence)	8.8		34.5		2.2		—		46.8		0.5
	Goldcoast Dr., Cincinnati, OH (Goldcoast)	0.6		6.7		0.1		0.6		6.7		—
	Knightsbridge Dr., Hamilton, OH (Hamilton)	—		49.2		3.5		—		49.9		2.1
	E. Monroe St., South Bend, IN (Monroe St.)	—		2.5		—		—		3.2		—
	Springer St., Lombard, IL (Lombard)	1.3		4		0.2		—		2.6		—
	Crescent Circle, South Bend, IN (Blackthorn)	—		3.4		0.1		—		3.3		0.1
	Kingsview Dr., Lebanon, OH (Lebanon)	4		71.4		1.7		4		71		1.1
	McAuley Place, Blue Ash, OH (Blue Ash)	—		0.6		—		—		0.6		—
	Westway Park Blvd., Houston, TX (Houston West 1)	1.4		88.4		21.4		3.3		87.8		12
	Westway Park Blvd., Houston, TX (Houston West 2)	2		20.9		14.5		—		—		—
	N. Sam Houston Pky., Houston, TX (Houston-MetroNational)	18.3		—		—		—		—		—
	Southwest Fwy., Houston, TX (Galleria)	—		68.7		12.1		—		66		6.6
	E. Ben White Blvd., Austin, TX (Austin 1)	—		22.5		1.1		—		22.6		0.8
	S. State Highway 121 Business, Lewisville, TX (Lewisville)	—		77		19.5		—		76		9.6
	Marsh Lane, Carrollton, TX	—		0.1		0.4		—		0.1		0.2
	Midway Rd., Carrollton, TX	—		2		0.4		—		2		0.3
	W. Frankford Rd., Carrollton, TX (Carrollton)	16.1		41.3		13.2		16.1		34.6		5
	Bryan St., Dallas, TX	—		0.1		0.1		—		0.1		—
	North Freeway, Houston, TX (Greenspoint)	—		1.3		0.4		—		1.3		0.4
	South Ellis Street, Chandler, AZ (Phoenix)	14.8		55.9		9.8		15		38.7		6.8
	Westover Hills Blvd., San Antonio, TX (San Antonio 1)	4.6		32		23.6		4.6		30.8		4.7
	Westover Hills Blvd., San Antonio, TX (San Antonio 2)	6.7		—		—		—		—		—
	Metropolis Dr., Austin, TX (Austin 2)	2		23		1.5		—		22.7		0.6
	Kestral Way (London)	—		34		0.6		—		17.1		0.3
	Jurong East (Singapore)	—		9.5		0.1		—		9.7		0.1
	Total	$	81.5	$	778.2	$	134.3	$	44.5	$	722.5	$	52.4
	Construction in progress was $63.2 million and $64.2 million as of September 30, 2013 and December 31, 2012, respectively. We continue to have high amounts of construction in progress as we continue to build data center facilities.
	In March 2013, we purchased a 33 acre parcel of land in the Houston West metro area adjacent to our existing Houston facilities for $18.2 million. We plan to develop this land in the future into data center space.
	On May 1, 2013, we executed our lease buyout option to purchase the Springer Street, Lombard, IL (Lombard) data center facility for a total purchase price of $5.5 million. The purchase price was used to settle the related capital lease obligation of $2.8 million and the excess purchase price of $2.7 million was allocated to the relative fair value of land and building.
	On May 3, 2013, we executed our lease buyout option to purchase the Industrial Road, Florence, KY (Florence) data center facility for a total purchase price of $10.5 million. The purchase price was used to settle the related capital lease obligation of $6.8 million and the excess purchase price of $3.7 million was allocated to the relative fair value of land and building.
	On June 18, 2013, we extinguished our Metropolis Drive, Austin, TX (Austin 2) data center facility related financing lease obligation for $12.2 million.  The extinguishment resulted in the settlement of the related financing lease obligation for Austin 2 of $8.9 million, acquisition of land of $2.0 million and a loss on extinguishment of debt of $1.3 million.
	On August 7, 2013, we acquired 22 acres of land for $6.7 million in San Antonio (San Antonio 2) for future data center expansions.
	Upon completion of the buyout of the Lombard and Florence capital leases, the gross basis of the acquired assets were reset to the net carrying value of the leased assets and the depreciable life was extended to 25 years consistent with our policy for depreciating buildings. The amount of these adjustments for Lombard and Florence were $0.1 million and $7.9 million, respectively.
	The allocated amounts related to the Lombard and Florence data center acquisitions represent a preliminary allocation of purchase price to the assets acquired and are subject to final fair value measurements.

Debt_and_Other_Financing_Arran

Debt and Other Financing Arrangements	9 Months Ended
	Sep. 30, 2013
Debt Instrument [Line Items]	'
Debt and Other Financing Arrangements	'
	Debt and Other Financing Arrangements
	The Company’s outstanding debt and other financing arrangements consists of the following:
		Successor		Predecessor
	(dollars in millions)	30-Sep-13		31-Dec-12
	Revolving credit agreement	$	—	$	—
	Capital lease obligations	18.8		32.2
	6 3/8% Senior Notes due 2022	525		525
	Other financing arrangements	55.8		60.8
	Total	$	599.6	$	618
	Revolving Credit Agreement—As of September 30, 2013, and December 31, 2012, we had no outstanding borrowings on our revolving credit agreement, leaving $225 million available for borrowings with a sub-limit of $50 million for letters of credit and a $30 million sub-limit for swingline loans. The revolving credit agreement has a maturity date of November 20, 2017.
	Borrowings under the revolving credit agreement will be used for working capital, capital expenditures and other general corporate purposes of CyrusOne LLC, the operating subsidiary of CyrusOne LP, the borrower and the other subsidiaries of CyrusOne, including for acquisitions, dividends and other distributions permitted thereunder. Letters of credit will be used for general corporate purposes.
	All obligations under the revolving credit agreement are unconditionally guaranteed by CyrusOne Inc., CyrusOne GP and each of CyrusOne LP’s existing and future domestic wholly-owned subsidiaries, subject to certain exceptions. All obligations under the revolving credit agreement, and the guarantees of those obligations, are secured by substantially all of our assets, subject to certain exceptions.
	The revolving credit agreement bears interest, at our option, at a rate equal to an applicable margin over either a base rate or a LIBOR rate. The applicable margin is 2.5% for base rate loans and 3.5% for LIBOR loans. Interest with respect to base rate loans is payable quarterly in arrears on the last business day of each calendar quarter.
	The revolving credit agreement, subject to certain exceptions contains customary affirmative and negative covenants, including, but not limited to, restrictions on the ability to incur additional indebtedness, create liens, make certain investments, make certain dividends and related distributions, prepay certain debt, engage in affiliate transactions, enter into, or undertake, certain liquidations, mergers, consolidations or acquisitions, amend the organizational documents and dispose of assets or subsidiaries. In addition, the revolving credit agreement requires us to maintain a certain secured net leverage ratio, ratio of earnings before interest, taxes, depreciation and amortization (“EBITDA”) to fixed charges and ratio of total indebtedness to gross asset value, in each case on a consolidated basis. Notwithstanding the limitations set forth above, we will be permitted, subject to the terms and conditions of the revolving credit agreement, to distribute to our shareholders cash dividends in an amount not to exceed 95% of our adjusted funds from operations (“AFFO”) for any period.
	The revolving credit agreement contains customary events of default (which are in some cases subject to certain exceptions, thresholds, notice requirements and grace periods), including, but not limited to, nonpayment of principal or interest, failure to perform or observe covenants, breaches of representations and warranties, cross-defaults with certain other indebtedness, certain bankruptcy-related events or proceedings, final monetary judgments or orders, ERISA defaults, certain change of control events and loss of REIT status following a REIT election by us.
	We pay commitment fees for the unused amount of borrowings on the revolving credit agreement and letter of credit fees on any outstanding letters of credit. The commitment fees are equal to 0.50% of the actual daily amount by which the aggregate revolving commitments exceed the sum of outstanding revolving loans and letter of credit obligations. Commitment fees related to the revolving credit agreement were immaterial for all periods presented.
	Capital Lease Obligations—We use leasing as a source of financing for certain of our data center facilities and related equipment. We currently operate four data center facilities recognized as capital leases. We have options to extend the initial lease term on all of these leases. Interest expense on capital lease obligations was $1.6 million, $4.6 million and $0.3 million, for the three months ended September 30, 2013, and the periods ended September 30, 2013, and January 23, 2013, respectively. For the three and nine months ended September 30, 2012, interest expense was $2.2 million and $5.5 million, respectively.
	6 3/8% Senior Notes due 2022—On November 20, 2012, CyrusOne LP and CyrusOne Finance Corp. (the “Issuers”) issued $525 million of 6 3/8% Senior Notes due 2022 (“Senior Notes”). The Senior Notes are senior unsecured obligations of the Issuers, which rank equally in right of payment with all existing and future unsecured senior debt of the Issuers. The Senior Notes are effectively subordinated to all existing and future secured indebtedness of the Issuers to the extent of the value of the assets securing such indebtedness. The Senior Notes are guaranteed on a joint and several basis, full and unconditional, by CyrusOne Inc., CyrusOne GP, and each of CyrusOne LP’s existing and future domestic wholly-owned subsidiaries, subject to certain exceptions. Each such guarantee is a senior unsecured obligation of the applicable guarantor, ranking equally with all existing and future unsecured senior debt of such guarantor and effectively subordinated to all existing and future secured indebtedness of such guarantor to the extent of the value of the assets securing that indebtedness. The Senior Notes are structurally subordinated to all liabilities (including trade payables) of each subsidiary of the Issuers that does not guarantee the Senior Notes. The Senior Notes bear interest at a rate of 6 3/8% per annum, payable semi-annually on May 15 and November 15 of each year, beginning on May 15, 2013, to persons who are registered holders of the Senior Notes on the immediately preceding May 1 and November 1, respectively. Interest expense on the Senior Notes was $8.3 million, $22.9 million and $2.1 million for the three months ended September 30, 2013, and the periods ended September 30, 2013, and January 23, 2013, respectively. There was no such expense for the three and nine months ended September 30, 2012.
	The indenture governing the Senior Notes limits the ability of CyrusOne LP and its restricted subsidiaries to incur indebtedness, encumber their assets, enter into sale and leaseback transactions, make restricted payments, enter into mergers, create dividend restrictions and other payment restrictions that affect CyrusOne LP’s restricted subsidiaries, permit restricted subsidiaries to guarantee certain indebtedness, enter into transactions with affiliates, sell assets and engage in certain business activities, in each case subject to certain qualifications set forth in the indenture.
	The Senior Notes will mature on November 15, 2022. However, prior to November 15, 2017, the Issuers may, at their option, redeem some or all of the Senior Notes at a redemption price equal to 100% of the principal amount of the Senior Notes, together with accrued and unpaid interest, if any, plus a “make-whole” premium. On or after November 15, 2017, the Issuers may, at their option, redeem some or all of the 6 3/8% Senior Notes at any time at declining redemption prices equal to (i) 103.188% beginning on November 15, 2017, (ii) 102.125% beginning on November 15, 2018, (iii) 101.063% beginning on November 15, 2019, and (iv) 100.000% beginning on November 15, 2020, and thereafter, plus, in each case, accrued and unpaid interest, if any, to the applicable redemption date. In addition, before November 15, 2015, and subject to certain conditions, the Issuers may, at their option, redeem up to 35% of the aggregate principal amount of the Senior Notes with the net proceeds of certain equity offerings at 106.375% of the principal amount thereof, plus accrued and unpaid interest, if any, to the date of redemption; provided that (i) at least 65% of the aggregate principal amount of the Senior Notes remains outstanding and (ii) the redemption occurs within 90 days of the closing of any such equity offering.
	Other Financing Arrangements—Other financing arrangements represents leases of real estate in which we are involved in the construction of structural improvements to develop buildings into data centers. When we bear substantially all the construction period risk, such as managing or funding construction, we are deemed to be the accounting owner of the leased property and, at the lease inception date, we are required to record at fair value the property and associated liability on our balance sheet. These transactions generally do not qualify for sale-leaseback accounting due to our continued involvement in these data center operations.
	Deferred Financing Costs—Deferred financing costs are costs incurred in connection with obtaining long-term financing. We incurred deferred financing costs in connection with the revolving credit agreement and the issuance of the Senior Notes. Total deferred financing costs as of September 30, 2013, were $15.5 million. Deferred financing costs are amortized over the term of the related indebtedness. Amortization of deferred financing costs, included in interest expense in the consolidated statements of operations, totaled $0.5 million, $2.8 million and $0.1 million for the three months ended September 30, 2013, and the periods ended September 30, 2013 and January 23, 2013, respectively, with no such costs incurred during the three and nine months ended September 30, 2012.
	Debt Covenants—The indenture governing the Senior Notes contains affirmative and negative covenants customarily found in indebtedness of this type, including a number of covenants that, among other things, restrict, subject to certain exceptions, the Company’s ability to: incur secured or unsecured indebtedness; pay dividends or distributions on its equity interests, or redeem or repurchase equity interests of the Company; make certain investments or other restricted payments; enter into transactions with affiliates; enter into agreements limiting the ability of the operating partnership’s subsidiaries to pay dividends or make certain transfers and other payments to the operating partnership or to other subsidiaries; sell assets; and merge, consolidate or transfer all or substantially all of the operating partnership’s assets. Notwithstanding the foregoing, the covenants contained in the indenture do not restrict the Company’s ability to pay dividends or distributions to shareholders to the extent (i) no default or event of default exists or is continuing under the indenture and (ii) the Company believes in good faith that we qualify as a REIT under the Code and the payment of such dividend or distribution is necessary either to maintain its status as a REIT or to enable it to avoid payment of any tax that could be avoided by reason of such dividend or distribution. The Company and its subsidiaries are also required to maintain total unencumbered assets of at least 150% of their unsecured debt on a consolidated basis, provided that for the purposes of such calculation their revolving credit agreement facility shall be treated as unsecured indebtedness.
	The revolving credit agreement requires us to maintain a certain secured net leverage ratio, ratio of EBITDA to fixed charges and ratio of total indebtedness to gross asset value, in each case on a consolidated basis. Notwithstanding these limitations, we will be permitted, subject to the terms and conditions of the revolving credit agreement, to distribute to our shareholders cash dividends in an amount not to exceed 95% of our AFFO for any period. Similarly, our indenture permits dividends and distributions necessary for us to maintain our status as a REIT.
	The Company’s most restrictive covenants are generally included in its revolving credit agreement. In order to continue to have access to the amounts available to it under the revolving credit agreement, the Company must remain in compliance with all covenants.
	As of September 30, 2013, the Company was in compliance with all covenants.
CyrusOne L.P. [Member]	'
Debt Instrument [Line Items]	'
Debt and Other Financing Arrangements	'
	Debt and Other Financing Arrangements
	The Company’s outstanding debt and other financing arrangements consists of the following:
		Successor		Predecessor
	(dollars in millions)	30-Sep-13		31-Dec-12
	Revolving credit agreement	$	—	$	—
	Capital lease obligations	18.8		32.2
	6 3/8% Senior Notes due 2022	525		525
	Other financing arrangements	55.8		60.8
	Total	$	599.6	$	618
	Revolving Credit Agreement—As of September 30, 2013, and December 31, 2012, we had no outstanding borrowings on our revolving credit agreement, leaving $225 million available for borrowings with a sublimit of $50 million for letters of credit and a $30 million sublimit for swingline loans. The revolving credit agreement has a maturity date of November 20, 2017.
	Borrowings under the revolving credit agreement will be used for working capital, capital expenditures and other general corporate purposes of CyrusOne LLC, the operating subsidiary of CyrusOne LP, the borrower and the other subsidiaries of CyrusOne, including for acquisitions, dividends and other distributions permitted thereunder. Letters of credit will be used for general corporate purposes.
	All obligations under the revolving credit agreement are unconditionally guaranteed by CyrusOne Inc., CyrusOne GP and each of CyrusOne LP’s existing and future domestic wholly-owned subsidiaries, subject to certain exceptions. All obligations under the revolving credit agreement, and the guarantees of those obligations, are secured by substantially all of our assets, subject to certain exceptions.
	The revolving credit agreement bears interest, at our option, at a rate equal to an applicable margin over either a base rate or a LIBOR rate. The applicable margin is 2.5% for base rate loans and 3.5% for LIBOR loans. Interest with respect to base rate loans is payable quarterly in arrears on the last business day of each calendar quarter.
	The revolving credit agreement, subject to certain exceptions contains customary affirmative and negative covenants, including, but not limited to, restrictions on the ability to incur additional indebtedness, create liens, make certain investments, make certain dividends and related distributions, prepay certain debt, engage in affiliate transactions, enter into, or undertake, certain liquidations, mergers, consolidations or acquisitions, amend the organizational documents and dispose of assets or subsidiaries. In addition, the revolving credit agreement requires us to maintain a certain secured net leverage ratio, ratio of earnings before interest, taxes, depreciation and amortization (“EBITDA”) to fixed charges and ratio of total indebtedness to gross asset value, in each case on a consolidated basis. Notwithstanding the limitations set forth above, we will be permitted, subject to the terms and conditions of the revolving credit agreement, to distribute to our shareholders cash dividends in an amount not to exceed 95% of our adjusted funds from operations (“AFFO”) for any period.
	The revolving credit agreement contains customary events of default (which are in some cases subject to certain exceptions, thresholds, notice requirements and grace periods), including, but not limited to, nonpayment of principal or interest, failure to perform or observe covenants, breaches of representations and warranties, cross-defaults with certain other indebtedness, certain bankruptcy-related events or proceedings, final monetary judgments or orders, ERISA defaults, certain change of control events and loss of REIT status following a REIT election by CyrusOne Inc.
	We pay commitment fees for the unused amount of borrowings on the revolving credit agreement and letter of credit fees on any outstanding letters of credit. The commitment fees are equal to 0.50% of the actual daily amount by which the aggregate revolving commitments exceed the sum of outstanding revolving loans and letter of credit obligations. Commitment fees related to the revolving credit agreement were immaterial for all periods presented.
	Capital Lease Obligations—We use leasing as a source of financing for certain of our data center facilities and related equipment. We currently operate four data center facilities recognized as capital leases. We have options to extend the initial lease term on all of these leases. Interest expense on capital lease obligations was $1.6 million, $4.6 million and $0.3 million, for the three months ended September 30, 2013, and the periods ended September 30, 2013, and January 23, 2013, respectively. For the three and nine months ended September 30, 2012, interest expense was $2.2 million and $5.5 million, respectively.
	6 3/8% Senior Notes due 2022—On November 20, 2012, CyrusOne LP and CyrusOne Finance Corp. (the “Issuers”) issued $525 million of 6 3/8% the Senior Notes due 2022 ("Senior Notes"). The Senior Notes are senior unsecured obligations of the Issuers, which rank equally in right of payment with all existing and future unsecured senior debt of the Issuers. The Senior Notes are effectively subordinated to all existing and future secured indebtedness of the Issuers to the extent of the value of the assets securing such indebtedness. The Senior Notes are guaranteed on a joint and several basis, full and unconditional, by CyrusOne Inc., CyrusOne GP, and each of CyrusOne LP’s existing and future domestic wholly-owned subsidiaries, subject to certain exceptions. Each such guarantee is a senior unsecured obligation of the applicable guarantor, ranking equally with all existing and future unsecured senior debt of such guarantor and effectively subordinated to all existing and future secured indebtedness of such guarantor to the extent of the value of the assets securing that indebtedness. The Senior Notes are structurally subordinated to all liabilities (including trade payables) of each subsidiary of the Issuers that does not guarantee the Senior Notes. The Senior Notes bear interest at a rate of 6 3/8% per annum, payable semi-annually on May 15 and November 15 of each year, beginning on May 15, 2013, to persons who are registered holders of the Senior Notes on the immediately preceding May 1 and November 1, respectively. Interest expense on the Senior Notes was $8.3 million, $22.9 million and $2.1 million for the three months ended September 30, 2013, and the periods ended September 30, 2013, and January 23, 2013, respectively. There was no such expense for the three and nine months ended September 30, 2012.
	The indenture governing the Senior Notes limits the ability of CyrusOne LP and its restricted subsidiaries to incur indebtedness, encumber their assets, enter into sale and leaseback transactions, make restricted payments, enter into mergers, create dividend restrictions and other payment restrictions that affect CyrusOne LP’s restricted subsidiaries, permit restricted subsidiaries to guarantee certain indebtedness, enter into transactions with affiliates, sell assets and engage in certain business activities, in each case subject to certain qualifications set forth in the indenture.
	The Senior Notes will mature on November 15, 2022. However, prior to November 15, 2017, the Issuers may, at their option, redeem some or all of the Senior Notes at a redemption price equal to 100.0% of the principal amount of the Senior Notes, together with accrued and unpaid interest, if any, plus a “make-whole” premium. On or after November 15, 2017, the Issuers may, at their option, redeem some or all of the 6 3/8% Senior Notes at any time at declining redemption prices equal to (i) 103.188% beginning on November 15, 2017, (ii) 102.125% beginning on November 15, 2018, (iii) 101.163% beginning on November 15, 2019, and (iv) 100.000% beginning on November 15, 2020, and thereafter, plus, in each case, accrued and unpaid interest, if any, to the applicable redemption date. In addition, before November 15, 2015, and subject to certain conditions, the Issuers may, at their option, redeem up to 35% of the aggregate principal amount of the Senior Notes with the net proceeds of certain equity offerings at 106.375% of the principal amount thereof, plus accrued and unpaid interest, if any, to the date of redemption; provided that (i) at least 65% of the aggregate principal amount of the Senior Notes remains outstanding and (ii) the redemption occurs within 90 days of the closing of any such equity offering.
	Other Financing Arrangements—Other financing arrangements represents leases of real estate in which we are involved in the construction of structural improvements to develop buildings into data centers. When we bear substantially all the construction period risk, such as managing or funding construction, we are deemed to be the accounting owner of the leased property and, at the lease inception date, we are required to record at fair value the property and associated liability on our balance sheet. These transactions generally do not qualify for sale-leaseback accounting due to our continued involvement in these data center operations.
	Deferred Financing Costs—Deferred financing costs are costs incurred in connection with obtaining long-term financing. We incurred deferred financing costs in connection with the revolving credit agreement and the issuance of the Senior Notes. Total deferred financing costs as of September 30, 2013, were $15.5 million. Deferred financing costs are amortized over the term of the related indebtedness. Amortization of deferred financing costs, included in interest expense in the consolidated statements of operations, totaled $0.5 million, $2.8 million and $0.1 million for the three months ended September 30, 2013, and the periods ended September 30, 2013, and January 23, 2013, respectively, with no such costs incurred during the three and nine months ended September 30, 2012.
	Debt Covenants—The indenture governing the Senior Notes contains affirmative and negative covenants customarily found in indebtedness of this type, including a number of covenants that, among other things, restrict, subject to certain exceptions, the Company’s ability to: incur secured or unsecured indebtedness; pay dividends or distributions on its equity interests, or redeem or repurchase equity interests of the Company; make certain investments or other restricted payments; enter into transactions with affiliates; enter into agreements limiting the ability of the operating partnership’s subsidiaries to pay dividends or make certain transfers and other payments to the operating partnership or to other subsidiaries; sell assets; and merge, consolidate or transfer all or substantially all of the operating partnership’s assets. Notwithstanding the foregoing, the covenants contained in the indenture do not restrict the Company’s ability to pay dividends or distributions to stockholders to the extent (i) no default or event of default exists or is continuing under the indenture and (ii) the Company believes in good faith that CyrusOne Inc. will qualify as a REIT under the Code and the payment of such dividend or distribution is necessary either to maintain its status as a REIT or to enable it to avoid payment of any tax that could be avoided by reason of such dividend or distribution. The Company and its subsidiaries are also required to maintain total unencumbered assets of at least 150% of their unsecured debt on a consolidated basis, provided that for the purposes of such calculation their revolving credit agreement shall be treated as unsecured indebtedness.
	The revolving credit agreement requires us to maintain a certain secured net leverage ratio, ratio of EBITDA to fixed charges and ratio of total indebtedness to gross asset value, in each case on a consolidated basis. Notwithstanding these limitations, we will be permitted, subject to the terms and conditions of the revolving credit agreement, to distribute to our shareholders cash dividends in an amount not to exceed 95% of our AFFO for any period. Similarly, our indenture permits dividends and distributions necessary for us to maintain our status as a REIT.
	The Company’s most restrictive covenants are generally included in its revolving credit agreement. In order to continue to have access to the amounts available to it under the revolving credit agreement, the Company must remain in compliance with all covenants.
	As of September 30, 2013, the Company was in compliance with all covenants.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'
Fair Value of Financial Instruments	'
	Fair Value of Financial Instruments
	The fair value of cash and cash equivalents, restricted cash, accounts receivable, accounts payable and accrued expenses approximate their carrying value because of the short-term nature of these instruments. The carrying value and fair value of other financial instruments are as follows:
		Successor				Predecessor
		September 30, 2013				December 31, 2012
	(dollars in millions)	Carrying Value		Fair Value		Carrying Value		Fair Value
	6 3/8% Senior Notes due 2022	$	525	$	525	$	525	$	547.3
	Other financing arrangements	55.8		63.4		60.8		69.5
	The fair value of our Senior Notes was estimated based on the estimated fair value of these notes at September 30, 2013, and December 31, 2012, which is considered Level 1 of the fair value hierarchy. The estimated fair value of our Senior Notes on September 30, 2013 , and December 31, 2012, are based on the average trading price for these notes on or about the respective dates. The fair value of other financing arrangements at September 30, 2013, and December 31, 2012, was calculated using a discounted cash flow model that incorporates current borrowing rates for obligations of similar duration. These fair value measurements are considered Level 2 of the fair value hierarchy.
CyrusOne L.P. [Member]	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'
Fair Value of Financial Instruments	'
	Fair Value of Financial Instruments
	The fair value of cash and cash equivalents, restricted cash, accounts receivable, accounts payable and accrued expenses approximate their carrying value because of the short-term nature of these instruments. The carrying value and fair value of other financial instruments are as follows:
						Predecessor
		September 30, 2013				December 31, 2012
	(dollars in millions)	Carrying Value		Fair Value		Carrying Value		Fair Value
	6 3/8% Senior Notes due 2022	$	525	$	525	$	525	$	547.3
	Other financing arrangements	55.8		63.4		60.8		69.5
	The fair value of our Senior Notes was estimated based on the estimated fair value of these notes at September 30, 2013, and December 31, 2012, which is considered Level 1 of the fair value hierarchy. The estimated fair value of our Senior Notes on September 30, 2013, and December 31, 2012, are based on the average trading price for these notes on or about the respective dates. The fair value of other financing arrangements at September 30, 2013, and December 31, 2012, was calculated using a discounted cash flow model that incorporates current borrowing rates for obligations of similar duration. These fair value measurements are considered Level 2 of the fair value hierarchy.

Noncontrolling_Interest

Noncontrolling Interest	9 Months Ended
	Sep. 30, 2013
Noncontrolling Interest [Abstract]	'
Noncontrolling Interest	'
	Noncontrolling Interest
	As part of the IPO, CyrusOne Inc. together with CyrusOne GP, purchased 21.9 million (or 33.9%) of the outstanding partnership units of CyrusOne LP and CBI retained a 66.1% ownership or 42.6 million Operating Partnership units in CyrusOne LP. Commencing on January 17, 2014, CBI may exchange the partnership units of CyrusOne into cash, or shares of common stock of CyrusOne Inc. as determined by us, on a one-for-one basis based upon the fair value of a share of our common stock. We have evaluated whether we control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the share settlement of these Operating Partnership units. Based on the results of this analysis, we concluded that these convertible Operating Partnership units met the criteria to be classified within equity at September 30, 2013. For each share of common stock issued by us, the Operating Partnership issues an equivalent Operating Partnership unit to the Company. The redemption value of the noncontrolling interests at September 30, 2013, was approximately $809 million based on the closing price of our stock of $19.00 on September 30, 2013, the last trading day of the quarter ended September 30, 2013. As stock is issued by CyrusOne, CBI's ownership percentage will change. CyrusOne has issued shares in conjunction with the LTIP discussed in Note 10 and CBI's ownership is 65.8% as of September 30, 2013.

Shareholders_Equity_Partnershi

Shareholders' Equity / Partnership Capital	9 Months Ended
	Sep. 30, 2013
Schedule Of Stockholders Equity [Line Items]	'
Shareholders' Equity	'
	Shareholders’ Equity
	On September 4, 2013, we announced a regular cash dividend for the quarter ended September 30, 2013, of $0.16 per common share payable to shareholders of record as of September 27, 2013. In addition, holders of Operating Partnership units also received a distribution of $0.16 per unit. The dividend and distribution were paid on October 15, 2013.
CyrusOne L.P. [Member]	'
Schedule Of Stockholders Equity [Line Items]	'
Shareholders' Equity	'
	Partnership Capital
	On September 4, 2013, we announced a partnership dividend for the quarter ended September 30, 2013, of $10.3 million, or $0.16 per operating partnership unit. The distribution was paid on October 15, 2013.

Equity_Incentive_Plan

Equity Incentive Plan	9 Months Ended
	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Equity Incentive Plan	'
	Equity Incentive Plan
	In conjunction with the IPO, our Board of Directors adopted the 2012 LTIP . The LTIP is administered by the Board of Directors, or the plan administrator. Awards issuable under the LTIP include common stock, restricted stock, stock options and other incentive awards. We have reserved a total of 4 million shares of our common stock for issuance pursuant to the LTIP, which may be adjusted for changes in our capitalization and certain corporate transactions. To the extent that an award expires, terminates or lapses, or an award is settled in cash without the delivery of shares of common stock to the participant, then any unexercised shares subject to the award will be available for future grant or sale under the LTIP. Shares of restricted stock which are forfeited or repurchased by us pursuant to the LTIP may again be optioned, granted or awarded under the LTIP. The payment of dividend equivalents in cash in conjunction with any outstanding awards will not be counted against the shares available for issuance under the LTIP.
	Restricted Shares
	The Company issued approximately 1 million restricted shares to its employees, officers and board of director members in conjunction with the IPO. These restricted shares will generally vest over three years with a per share price of $19 and have been issued in the form of common stock. These restricted shares also earn non-forfeitable dividends throughout the vesting period.
	The Company recognized stock-based compensation expense of approximately $1.6 million and $4.3 million for the three months ended September 30, 2013, and the period ended September 30, 2013, respectively. In addition, we had unrecognized compensation expense of approximately $14.7 million as of September 30, 2013. This expense will be recognized over the remaining vesting period, or approximately 2.3 years.
	Performance Based Awards
	On April 17, 2013, the Company approved grants of performance-based options and performance-based restricted stock under the Company’s 2012 LTIP. These awards generally vest over three years and upon the achievement of certain performance-based objectives. These awards are expensed based on the grant date fair value if it is probable that the performance conditions will be achieved.
	The Company recognized stock-based compensation expense of approximately $0.3 million for the three months ended September 30, 2013, and $0.6 million for the period ended September 30, 2013, respectively. In addition, we had unrecognized compensation expense of approximately $3.2 million as of September 30, 2013. This expense will be recognized over the remaining vesting period, or approximately 2.5 years.
	The performance criteria is based on achieving both an EBITDA and a relative return target by the end of the three year period. We are recording a compensation charge based on achieving 100% of both targets.
CyrusOne L.P. [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Equity Incentive Plan	'
	Equity Incentive Plan
	In conjunction with the CyrusOne Inc. IPO, the Board of Directors of CyrusOne Inc. adopted the 2012 LTIP. The LTIP is administered by the Board of Directors, or the plan administrator. Awards issuable under the LTIP include common stock, restricted stock, stock options and other incentive awards. CyrusOne Inc. has reserved a total of 4 million shares of CyrusOne Inc. common stock for issuance pursuant to the LTIP, which may be adjusted for changes in capitalization and certain corporate transactions. To the extent that an award expires, terminates or lapses, or an award is settled in cash without the delivery of shares of common stock to the participant, then any unexercised shares subject to the award will be available for future grant or sale under the LTIP. Shares of restricted stock which are forfeited or repurchased by CyrusOne Inc. pursuant to the LTIP may again be optioned, granted or awarded under the LTIP. The payment of dividend equivalents in cash in conjunction with any outstanding awards will not be counted against the shares available for issuance under the LTIP. The related stock compensation expense incurred by CyrusOne Inc. will be allocated to the Operating Partnership.
	Restricted Shares
	CyrusOne Inc. issued approximately 1 million restricted shares to its employees, officers and board of director members in conjunction with CyrusOne Inc.'s IPO. These restricted shares will generally vest over three years with a per share price of $19 and have been issued in the form of common stock. These restricted shares also earn non-forfeitable dividends throughout the vesting period.
	CyrusOne Inc. recognized stock-based compensation expense of approximately $1.6 million and $4.3 million for the three months ended September 30, 2013, and the period ended September 30, 2013, respectively. In addition, CyrusOne Inc. had unrecognized compensation expense of approximately $14.7 million as of September 30, 2013. This expense will be recognized over the remaining vesting period, or approximately 2.3 years. The related stock compensation expense incurred by CyrusOne Inc. was allocated to the Operating Partnership for all relative periods.
	Performance Based Awards
	On April 17, 2013, the Company approved grants of performance-based options and performance-based restricted stock under the Company’s 2012 LTIP. These awards generally vest over three years and upon the achievement of certain performance-based objectives. These awards are expensed based on the grant date fair value if it is probable that the performance conditions will be achieved.
	CyrusOne Inc. recognized stock-based compensation expense of approximately $0.3 million for the three months ended September 30, 2013 and $0.6 million for the period ended September 30, 2013. In addition, CyrusOne Inc. had unrecognized compensation expense of approximately $3.2 million as of September 30, 2013. This expense will be recognized over the remaining vesting period, or approximately 2.5 years. The related stock compensation expense incurred by CyrusOne Inc. was allocated to the Operating Partnership for all respective periods.
	The performance criteria is based on achieving both an EBITDA and a relative return target by the end of the three year period. We are recording a compensation charge based on achieving 100% of both targets.

Loss_per_Share

Loss per Share	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Earnings (Loss) per Share	'
	Loss per Share
	Basic loss per share is calculated using the weighted average number of shares of common stock outstanding during the period. In addition, net loss applicable to participating securities and the related participating securities are excluded from the computation of basic loss per share.
	Diluted loss per share is calculated using the weighted average number of shares of common stock outstanding during the period, including restricted stock outstanding. If there is net income during the period, the dilutive impact of common stock equivalents outstanding would also be reflected.
	The following table reflects a reconciliation of the shares used in the basic and diluted net loss per share computation for the period ended September 30, 2013:
		Three Months Ended						Period Ended
		30-Sep-13						30-Sep-13
	(dollars in millions, except per share amount)	Basic			Diluted			Basic			Diluted
	Numerator:
	Net loss attributed to common shareholders	$	(0.8	)	$	(0.8	)	$	(4.0	)	$	(4.0	)
	Less: Restricted stock dividends	(0.2		)	(0.2		)	(0.5		)	(0.5		)
	Net loss available to shareholders	$	(1.0	)	$	(1.0	)	$	(4.5	)	$	(4.5	)
	Denominator:
	Weighted average common outstanding-basic	20.9			20.9			20.9			20.9
	Performance-based restricted stock(1)				—						—
	Convertible securities(1)				—						—
	Weighted average shares outstanding-diluted				20.9						20.9
	EPS:
	Net loss per share-basic	$	(0.05	)				$	(0.22	)
	Effect of dilutive shares
	Net loss per share-diluted				$	(0.05	)				$	(0.22	)
	(1) We have excluded 0.2 million of restricted stock, and 42.6 million of Operating Partnership units which are securities convertible into common stock in January 2014, from our diluted earnings per share as of September 30, 2013. These amounts were deemed anti-dilutive.

Related_Party_Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2013
Related Party Transaction [Line Items]	'
Related Party Transactions	'
	Related Party Transactions
	Prior to November 20, 2012, CyrusOne Inc., CyrusOne GP, CyrusOne LP and its subsidiaries were operated by CBI during the periods presented. As discussed in Note 3, the condensed consolidated financial statements have been prepared from the records maintained by CBI and may not necessarily be indicative of the conditions that would have existed or the results of operations that would have occurred if the business had been operated as an unaffiliated company. The condensed consolidated financial statements reflect the following transactions with CBI and its affiliated entities, including Cincinnati Bell Telephone (“CBT”) and Cincinnati Bell Technology Solutions (“CBTS”):
	Revenues—The Company records revenues from CBI under contractual service arrangements. These services include lease of data center space, power and cooling in certain of our data center facilities and network interface services.
	Operating Expenses—The Company records expenses from CBI incurred in relation to network support, services calls, monitoring and management, storage and backup, IT systems support, and connectivity services.
	Revenues and expenses for the periods presented were as follows:
		Successor		Successor		Predecessor
	(dollars in millions)	Three Months Ended September 30, 2013		January 24, 2013 to September 30, 2013		January 1, 2013 to January 23, 2013
	Revenue:
	Data center colocation agreement provided to CBT and CBTS	$	1.1	$	3.1	$	0.3
	229 West 7th Street lease provided to CBT	0.1		0.2		—
	Goldcoast Drive lease provided to CBT	—		0.1		—
	Parkway (Mason) lease provided to CBTS	0.1		0.2		—
	Transition services provided to CBTS (network interfaces)	0.7		1.4		0.1
	Data center leases provided to CBTS	0.4		3.8		—
	Total revenue	$	2.4	$	8.8	$	0.4
	Operating costs and expenses:
	Charges for services provided by CBT (connectivity)	0.9		1.6		0.1
	Allocated employee benefit plans by CBI	—		—		0.2
	Allocated centralized insurance costs by CBI	—		—		0.1
	General and administrative services provided by CBI	—		—		0.1
	Total operating costs and expenses	$	0.9	$	1.6	$	0.5
	As of September 30, 2013, and December 31, 2012, the amounts receivable and payable to CBI were as follows:
		Successor		Predecessor
		As of		As of
	(dollars in millions)	September 30, 2013		December 31, 2012
	Accounts receivable from CBI	$	0.9	$	2.2
	Accounts payable	$	0.2	$	2.9
	Dividends payable	6.8		—
	Accounts payable to CBI	$	7	$	2.9
	The dividends payable as of September 30, 2013, reflect the balance due to CBI related to the dividend declared on September 4, 2013, of $0.16 per share.
CyrusOne L.P. [Member]	'
Related Party Transaction [Line Items]	'
Related Party Transactions	'
	Related Party Transactions
	Prior to November 20, 2012, CyrusOne Inc., CyrusOne GP, CyrusOne LP and its subsidiaries were operated by CBI during the periods presented. As discussed in Note 3, the condensed consolidated financial statements have been prepared from the records maintained by CBI and may not necessarily be indicative of the conditions that would have existed or the results of operations that would have occurred if the business had been operated as an unaffiliated company. The condensed consolidated financial statements reflect the following transactions with CBI and its affiliated entities, including Cincinnati Bell Telephone (“CBT”) and Cincinnati Bell Technology Solutions (“CBTS”):
	Revenues—The Company records revenues from CBI under contractual service arrangements. These services include lease of data center space, power and cooling in certain of our data center facilities and network interface services.
	Operating Expenses—The Company records expenses from CBI incurred in relation to network support, services calls, monitoring and management, storage and backup, IT systems support, and connectivity services.
	Revenues and expenses for the periods presented were as follows:
		Successor		Successor		Predecessor
	(dollars in millions)	Three Months Ended September 30, 2013		January 24, 2013 to September 30, 2013		January 1, 2013 to January 23, 2013
	Revenue:
	Data center colocation agreement provided to CBT and CBTS	$	1.1	$	3.1	$	0.3
	229 West 7th Street lease provided to CBT	0.1		0.2		—
	Goldcoast Drive lease provided to CBT	—		0.1		—
	Parkway (Mason) lease provided to CBTS	0.1		0.2		—
	Transition services provided to CBTS (network interfaces)	0.7		1.4		0.1
	Data center leases provided to CBTS	0.4		3.8		—
	Total revenue	$	2.4	$	8.8	$	0.4
	Operating costs and expenses:
	Charges for services provided by CBT (connectivity)	0.9		1.6		0.1
	Allocated employee benefit plans by CBI	—		—		0.2
	Allocated centralized insurance costs by CBI	—		—		0.1
	General and administrative services provided by CBI	—		—		0.1
	Total operating costs and expenses	$	0.9	$	1.6	$	0.5
	As of September 30, 2013, and December 31, 2012, the amounts receivable and payable to CBI were as follows:
		Successor		Predecessor
		As of		As of
	(dollars in millions)	September 30, 2013		December 31, 2012
	Accounts receivable from CBI	$	0.9	$	2.2
	Accounts payable	$	0.2	$	2.9
	Dividends payable	6.8		—
	Accounts payable to CBI	$	7	$	2.9
	The dividends payable as of September 30, 2013, reflect the balance due to CBI related to the dividend declared on September 4, 2013, of $0.16 per share.

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	CyrusOne Inc., will elect to be taxed as a REIT under the Code, as amended, commencing with our taxable year ending December 31, 2013. To qualify as a REIT, we are required to distribute at least 90% of our taxable income to our stockholders and meet various other requirements imposed by the Code relating to such matters as operating results, asset holdings, distribution levels and diversity of stock ownership. Provided we qualify for taxation as a REIT, we are generally not subject to corporate level federal income tax on the earnings distributed currently to our shareholders. It is our policy and intent, subject to change, to distribute 100% of our taxable income and therefore no provision is required in the accompanying financial statements for federal income taxes with regards to activities of the CyrusOne Inc. and its subsidiary pass-through entities.
	We have elected to designate two subsidiaries as taxable REIT subsidiaries (each, a "TRS"). A TRS may perform services for our tenants that would otherwise be considered impermissible for REITs. The income generated from these services is taxed at federal and state corporate rates. Income tax expense for the three months and period ended September 30, 2013, were $0.3 million and $1.2 million, respectively.
	In conjunction with the Company’s tax sharing arrangement with CBI, CBI may be required to file Texas margin tax returns on a consolidated, combined or unitary basis with the Company for any given year.   If such return is prepared by CBI on a combined or consolidated basis to include the Company, the related Texas margin tax of the Company will be paid by CBI. The Company will then reimburse CBI for its portion of the related Texas margin tax.  As of September 30, 2013, our total Texas margin tax payable was $0.8 million.
	For certain entities we calculate deferred tax assets and liabilities for temporary differences in the basis between financial statement and income tax assets and liabilities. Deferred income taxes are recalculated annually at rates then in effect. Valuation allowances are recorded to reduce deferred tax assets to amounts that are more likely than not to be realized. The ultimate realization of the deferred tax assets depends upon our ability to generate future taxable income during the periods in which basis differences and other deductions become deductible and prior to the expiration of the net operating loss carryforwards. Deferred tax assets (net of valuation allowance) and liabilities were accrued, as necessary, for the periods ended September 30, 2013, and December 31, 2012. The net deferred tax assets were $0.6 million as of September 30, 2013, and $0.5 million as of December 31, 2012.

Guarantors_Guarantors

Guarantors Guarantors	9 Months Ended
	Sep. 30, 2013
Condensed Financial Statements, Captions [Line Items]	'
Guarantors	'
	Guarantors
	CyrusOne LP and CyrusOne Finance Corp., as “LP Co-issuer” and “Finance Co-issuer,” respectively (together, the “Issuers”), had $525 million aggregate principal amount of Senior Notes outstanding at September 30, 2013. The Senior Notes are fully and unconditionally and jointly and severally guaranteed on a senior basis by CyrusOne Inc. (“Parent Guarantor”), CyrusOne GP (“General Partner”), and CyrusOne LP’s 100% owned subsidiaries, CyrusOne LLC, CyrusOne TRS Inc. and CyrusOne Foreign Holdings LLC (such subsidiaries, together the “Guarantors”). None of the subsidiaries organized outside of the United States (collectively, the “Non-Guarantors”) guarantee the Senior Notes. Subject to the provisions of the indenture governing the Senior Notes, in certain circumstances, a Guarantor may be released from its guarantee obligation, including:
	•	upon the sale or other disposition (including by way of consolidation or merger) of such Guarantor or of all of the capital stock of such Guarantor such that such Guarantor is no longer a restricted subsidiary under the indenture,
	•	upon the sale or disposition of all or substantially all of the assets of the Guarantor,
	•	upon the LP Co-issuer designating such Guarantor as an unrestricted subsidiary under the terms of the indenture,
	•	if such Guarantor is no longer a guarantor or other obligor of any other indebtedness of the LP Co-issuer or the Parent Guarantor, and
	•	upon the defeasance or discharge of the Senior Notes in accordance with the terms of the indenture.
	The following provides information regarding the entity structure of each guarantor of the Senior Notes:
	CyrusOne Inc. – CyrusOne Inc. was formed on July 31, 2012. As of January 23, 2013, CyrusOne Inc. was a wholly-owned subsidiary of CBI. Effective January 24, 2013, CyrusOne Inc. completed its IPO of common stock for net proceeds of $337.1 million, and together with the General Partner, purchased a 33.9% ownership interest in CyrusOne LP. CyrusOne Inc. also represents a guarantor or Parent Guarantor and became a separate registrant with the SEC upon completion of its IPO.
	CyrusOne GP – CyrusOne GP was formed on July 31, 2012, and was a 100% owned subsidiary of CyrusOne Inc. as of January 23, 2013. Effective upon completion of CyrusOne Inc.’s IPO, this entity became the general partner and 1% owner of CyrusOne LP and has no other assets or operations. Prior to the IPO, this entity did not incur any obligations or record any transactions.
	Issuers – The Issuers include CyrusOne LP and CyrusOne Finance Corp. CyrusOne Finance Corp., a 100% owned subsidiary of CyrusOne LP, was formed for the sole purpose of acting as co-issuer of the Senior Notes and has no other assets or operations. CyrusOne LP, in addition to being the co-issuer of the Senior Notes, is also the 100% owner, either directly or indirectly, of the Guarantors and Non-Guarantors.
	Guarantors – The guarantors include CyrusOne LLC, CyrusOne TRS Inc., and CyrusOne Foreign Holdings LLC. CyrusOne LLC accounts for all of the domestic operations of CyrusOne LP, including the businesses that composed the Predecessor operations. CyrusOne LLC, together with CyrusOne Foreign Holdings LLC, directly or indirectly owns 100% of the Non-Guarantors. As of September 30, 2013, CyrusOne TRS Inc. had not incurred any obligations or recorded any material transactions for the three months and period ended September 30, 2013.
	As of September 30, 2013, the Non-Guarantors consist of 100% owned subsidiaries which conduct operations in the United Kingdom and Singapore.
	The following schedules present the financial information for the three months ended September 30, 2013, period ended September 30, 2013, period ended January 23, 2013, the three and nine months ended September 30, 2012, and the year ended December 31, 2012, for the Parent Guarantor, General Partner, LP Co-issuer, Finance Co-issuer, Guarantors, and Non-Guarantors. The financial statements for the period ended January 23, 2013, present the financial information for the Parent Guarantor, General Partner, LP Co-issuer, Finance Co-issuer, Guarantors, and Non-Guarantors, prior to the effective date of the IPO. The financial statements for the three months and period ended September 30, 2013, present the financial information for the Parent Guarantor, General Partner, LP Co-issuer, Finance Co-issuer, Guarantors, and Non-Guarantors, after the effective date of the IPO. The consolidating schedules are provided in accordance with the reporting requirements for guarantor subsidiaries.
	Condensed Consolidating Balance Sheets
	(dollars in millions)		As of September 30, 2013
			Parent			General			LP			Finance			Guarantors			Non-			Eliminations			Total
			Guarantor			Partner			Co-issuer			Co-issuer						Guarantors
	Land		$	—		$	—		$	—		$	—		$	81.5		$	—		$	—		$	81.5
	Buildings and improvements		—			—			—			—			734.8			43.4			—			778.2
	Equipment		—			—			—			—			133.6			0.7			—			134.3
	Construction in progress		—			—			—			—			63.2			—			—			63.2
	Subtotal		—			—			—			—			1,013.10			44.1			—			1,057.20
	Accumulated depreciation		—			—			—			—			(214.6		)	(4.0		)	—			(218.6		)
	Net investment in real estate		—			—			—			—			798.5			40.1			—			838.6
	Cash and cash equivalents		—			—			—			—			211.8			1.4			—			213.2
	Investment in subsidiaries		790.4			7.9			814.7			—			0.3			—			(1,613.3		)	—
	Rent and other receivables		—			—			—			—			33.3			0.6			—			33.9
	Intercompany receivable		—			—			508.1			508.2			0.2			—			(1,016.5		)	—
	Goodwill		—			—			—			—			276.2			—			—			276.2
	Intangible assets, net		—			—			—			—			89.9			—			—			89.9
	Due from affiliates		—			—			—			—			0.9			—			—			0.9
	Other assets		—			—			15.5			15.5			49.8			1.9			(15.5		)	67.2
	Total assets		$	790.4		$	7.9		$	1,338.30		$	523.7		$	1,460.90		$	44		$	(2,645.3	)	$	1,519.90
	Accounts payable and accrued expenses		$	—		$	—		$	16.1		$	12.6		$	51.3		$	0.4		$	(12.6	)	$	67.8
	Deferred revenue		—			—			—			—			54.4			0.7			—			55.1
	Intercompany payable		—			—			—			—			508.1			0.2			(508.3		)	—
	Due to affiliates		—			—			6.8			—			0.2			—			—			7
	Capital lease obligations		—			—			—			—			10.4			8.4			—			18.8
	Long-term debt		—			—			525			525			—			—			(525.0		)	525
	Other financing arrangements		—			—			—			—			21.8			34			—			55.8
	Total liabilities		—			—			547.9			537.6			646.2			43.7			(1,045.9		)	729.5
	Total equity		790.4			7.9			790.4			(13.9		)	814.7			0.3			(1,599.4		)	790.4
	Total liabilities and equity		$	790.4		$	7.9		$	1,338.30		$	523.7		$	1,460.90		$	44		$	(2,645.3	)	$	1,519.90
	(dollars in millions)		As of December 31, 2012
			Parent			General			LP			Finance			Guarantors			Non-			Eliminations			Total
			Guarantor			Partner			Co-issuer			Co-issuer						Guarantors
	Land		$	—		$	—		$	—		$	—		$	44.5		$	—		$	—		$	44.5
	Buildings and improvements		—			—			—			—			695.7			26.8			—			722.5
	Equipment		—			—			—			—			52			0.4			—			52.4
	Construction in progress		—			—			—			—			51.4			12.8			—			64.2
	Subtotal		—			—			—			—			843.6			40			—			883.6
	Accumulated depreciation		—			—			—			—			(174.8		)	(1.9		)	—			(176.7		)
	Net investment in real estate		—			—			—			—			668.8			38.1			—			706.9
	Cash and cash equivalents		—			—			—			—			15.6			0.9			—			16.5
	Investment in subsidiaries		—			—			497.2			—			0.4			—			(497.6		)	—
	Rent and other receivables		—			—			—			—			32.6			0.6			—			33.2
	Restricted cash		—			—			—			—			6.3			—			—			6.3
	Goodwill		—			—			—			—			276.2			—			—			276.2
	Intangible assets, net		—			—			—			—			102.6			—			—			102.6
	Intercompany receivable		—			—			508.2			508.2			—			—			(1,016.4		)	—
	Due from affiliates		—			—			—			—			2.2			—			—			2.2
	Other assets		7.9			—			17			17			41.6			0.5			(17.0		)	67
Total assets		$	7.9		$	—		$	1,022.40		$	525.2		$	1,146.30		$	40.1		$	(1,531.0	)	$	1,210.90
Accounts payable and accrued expenses		$	0.8		$	—		$	4.4		$	4.4		$	31.7		$	0.2		$	(4.4	)	$	37.1
Deferred revenue		—			—			—			—			52.3			0.5			—			52.8
Intercompany payable		—			—			—			—			508			0.2			(508.2		)	—
Due to affiliates		—			—			—			—			2.9			—			—			2.9
Capital lease obligations		—			—			—			—			23.2			9			—			32.2
Long-term debt		—			—			525			525			—			—			(525.0		)	525
Other financing arrangements		—			—			—			—			31			29.8			—			60.8
Total liabilities		0.8			—			529.4			529.4			649.1			39.7			(1,037.6		)	710.8
Total parent’s net investment		7.1			—			493			(4.2		)	497.2			0.4			(493.4		)	500.1
Total liabilities and parent’s net investment		$	7.9		$	—		$	1,022.40		$	525.2		$	1,146.30		$	40.1		$	(1,531.0	)	$	1,210.90
Condensed Consolidating Statements of Operations
(dollars in millions)	Three Months Ended September 30, 2013
		Parent			General			LP			Finance			Guarantors			Non-			Eliminations			Total
		Guarantor			Partner			Co-issuer			Co-issuer						Guarantors
Revenue		$	—		$	—		$	—		$	—		$	66.4		$	1.1		$	—		$	67.5
Costs and expenses:
Property operating expenses		—			—			—			—			23.7			0.5			—			24.2
Sales and marketing		—			—			—			—			2.2			0.1			—			2.3
General and administrative		—			—			—			—			7.1			0.1			—			7.2
Depreciation and amortization		—			—			—			—			23.2			0.7			—			23.9
Transaction costs		—			—			—			—			0.7			—			—			0.7
Restructuring charges		—			—			—			—			0.7			—			—			0.7
Total costs and expenses		—			—			—			—			57.6			1.4			—			59
Operating income (loss)		—			—			—			—			8.8			(0.3		)	—			8.5
Interest expense (income)		—			—			9.2			9.2			0.4			0.9			(9.2		)	10.5
Other income		—			—			—			—			(0.1		)	—			—			(0.1		)
Income (loss) before income taxes		—			—			(9.2		)	(9.2		)	8.5			(1.2		)	9.2			(1.9		)
Income tax expense		—			—			—			—			(0.3		)	—			—			(0.3		)
Equity earnings (loss) related to investment in subsidiaries		(2.2		)	—			7			—			(1.2		)	—			(3.6		)	—
Income (loss) from continuing operations		(2.2		)	—			(2.2		)	(9.2		)	7			(1.2		)	5.6			(2.2		)
Noncontrolling interest in net loss		1.4			—			—			—			—			—			—			1.4
Net income (loss) attributed to common shareholders		$	(0.8	)	$	—		$	(2.2	)	$	(9.2	)	$	7		$	(1.2	)	$	5.6		$	(0.8	)
(dollars in millions)		Three Months Ended September 30, 2012
		Parent			General			LP			Finance			Guarantors			Non-			Eliminations			Total
		Guarantor			Partner			Co-issuer			Co-issuer						Guarantors
Revenue		$	—		$	—		$	—		$	—		$	56.3		$	0.4		$	—		$	56.7
Costs and expenses:
Property operating expenses		—			—			—			—			19.5			0.5			—			20
Sales and marketing		—			—			—			—			2			0.1			—			2.1
General and administrative		—			—			—			—			5.2			0.1			—			5.3
Depreciation and amortization		—			—			—			—			18.2			0.6			—			18.8
Transaction costs		—			—			—			—			0.6			—			—			0.6
Management fees charged by CBI		—			—			—			—			0.9			—			—			0.9
Loss on sale of receivables to an affiliate		—			—			—			—			1.3			—			—			1.3
Total costs and expenses		—			—			—			—			47.7			1.3			—			49
Operating income (loss)		—			—			—			—			8.6			(0.9		)	—			7.7
Interest expense		—			—			—			—			10.2			1.1			—			11.3
Loss before income taxes		—			—			—			—			(1.6		)	(2.0		)	—			(3.6		)
Income tax benefit		—			—			—			—			0.7			—			—			0.7
Equity earnings (loss) related to investments in subsidiaries		—			—			—			—			(2.0		)	—			2			—
Loss from continuing operations		—			—			—			—			(2.9		)	(2.0		)	2			(2.9		)
Gain on sale of real estate improvements		—			—			—			—			0.1			—			—			0.1
Net loss		$	—		$	—		$	—		$	—		$	(2.8	)	$	(2.0	)	$	2		$	(2.8	)
(dollars in millions)	Period Ended September 30, 2013
		Parent			General			LP			Finance			Guarantors			Non-			Eliminations			Total
		Guarantor			Partner			Co-issuer			Co-issuer						Guarantors
Revenue		$	—		$	—		$	—		$	—		$	173.4		$	2.7		$	—		$	176.1
Costs and expenses:
Property operating expenses		—			—			—			—			62.5			1.6			—			64.1
Sales and marketing		—			—			—			—			7.1			0.2			—			7.3
General and administrative		—			—			—			—			19.6			0.1			—			19.7
Depreciation and amortization		—			—			—			—			61.3			2			—			63.3
Restructuring charges		—			—			—			—			0.7			—			—			0.7
Transaction costs		—			—			—			—			1.1			—			—			1.1
Total costs and expenses		—			—			—			—			152.3			3.9			—			156.2
Operating income (loss)		—			—			—			—			21.1			(1.2		)	—			19.9
Interest expense (income)		—			—			26.5			26.5			1.3			1.9			(26.5		)	29.7
Other income		—			—			—			—			(0.1		)	—			—			(0.1		)
Loss on extinguishment of debt		—			—			—			—			1.3			—			—			1.3
Income (loss) before income taxes		—			—			(26.5		)	(26.5		)	18.6			(3.1		)	26.5			(11.0		)
Income tax expense		—			—			—			—			(0.8		)	—			—			(0.8		)
Equity earnings (loss) related to investment in subsidiaries		(11.8		)	(0.1		)	14.7			—			(3.1		)	—			0.3			—
Income (loss) from continuing operations		(11.8		)	(0.1		)	(11.8		)	(26.5		)	14.7			(3.1		)	26.8			(11.8		)
Noncontrolling interest in net loss		7.8			—			—			—			—			—			—			7.8
Net income (loss) attributed to common stockholders		$	(4.0	)	$	(0.1	)	$	(11.8	)	$	(26.5	)	$	14.7		$	(3.1	)	$	26.8		$	(4.0	)
(dollars in millions)		Period Ended January 23, 2013
		Parent			General			LP			Finance			Guarantors			Non-			Eliminations			Total
		Guarantor			Partner			Co-issuer			Co-issuer						Guarantors
Revenue		$	—		$	—		$	—		$	—		$	14.9		$	0.2		$	—		$	15.1
Costs and expenses:
Property operating expenses		—			—			—			—			4.8			—			—			4.8
Sales and marketing		—			—			—			—			0.7			—			—			0.7
General and administrative		—			—			—			—			1.4			0.1			—			1.5
Transaction-related compensation		—			—			—			—			20			—			—			20
Depreciation and amortization		—			—			—			—			5.2			0.1			—			5.3
Transaction costs		—			—			—			—			0.1			—			—			0.1
Total costs and expenses		—			—			—			—			32.2			0.2			—			32.4
Operating loss		—			—			—			—			(17.3		)	—			—			(17.3		)
Interest expense		—			—			2.3			2.3			0.1			0.1			(2.3		)	2.5
Loss before income taxes		—			—			(2.3		)	(2.3		)	(17.4		)	(0.1		)	2.3			(19.8		)
Income tax expense		—			—			—			—			(0.4		)	—			—			(0.4		)
Equity earnings (loss) related to investment in subsidiaries		—			—			(17.9		)	—			(0.1		)	—			18			—
Loss from continuing operations		—			—			(20.2		)	(2.3		)	(17.9		)	(0.1		)	20.3			(20.2		)
Net loss		$	—		$	—		$	(20.2	)	$	(2.3	)	$	(17.9	)	$	(0.1	)	$	20.3		$	(20.2	)
(dollars in millions)		Nine Months Ended September 30, 2012
		Parent			General			LP			Finance			Guarantors			Non-			Eliminations			Total
		Guarantor			Partner			Co-issuer			Co-issuer						Guarantors
Revenue		$	—		$	—		$	—		$	—		$	161.8		$	1		$	—		$	162.8
Costs and expenses:
Property operating expenses		—			—			—			—			54			1.3			—			55.3
Sales and marketing		—			—			—			—			5.6			0.2			—			5.8
General and administrative		—			—			—			—			15.3			0.1			—			15.4
Depreciation and amortization		—			—			—			—			51.7			1.2			—			52.9
Transaction costs		—			—			—			—			1.3			—			—			1.3
Management fees charged by CBI		—			—			—			—			2.1			—			—			2.1
Loss on sale of receivables to an affiliate		—			—			—			—			3.7			—			—			3.7
Asset Impairment		—			—			—			—			13.3			—			—			13.3
Total costs and expenses		—			—			—			—			147			2.8			—			149.8
Operating income (loss)		—			—			—			—			14.8			(1.8		)	—			13
Interest expense		—			—			—			—			28.9			2.3			—			31.2
Loss before income taxes		—			—			—			—			(14.1		)	(4.1		)	—			(18.2		)
Income tax benefit		—			—			—			—			4.7			—			—			4.7
Equity earnings (loss) related to investments in subsidiaries		—			—			—			—			(4.1		)	—			4.1			—
Loss from continuing operations		—			—			—			—			(13.5		)	(4.1		)	4.1			(13.5		)
Gain on sale of real estate improvements		—			—			—			—			0.1			—			—			0.1
Net loss		$	—		$	—		$	—		$	—		$	(13.4	)	$	(4.1	)	$	4.1		$	(13.4	)
Condensed Consolidating Statements of Cash Flows
(dollars in millions)		Period Ended September 30, 2013
		Parent			General			LP			Finance			Guarantors			Non-			Eliminations			Total
		Guarantor			Partner			Co-issuer			Co-issuer						Guarantors
Net cash provided by (used in) operating activities		$	—		$	—		(17.3		)	$	(17.2	)	$	82.3		$	(2.2	)	$	17.2		$	62.8
Cash flows from investing activities:
Capital expenditures - acquisitions of real estate		—			—			—			—			(33.3		)	—			—			(33.3		)
Capital expenditures - other		—			—			—			—			(124.5		)	(0.1		)	—			(124.6		)
Investment in subsidiaries		(337.1		)	—			(337.1		)	—			—			—			674.2			—
Return of investment		20.7			—			39.2			18.5			—			—			(78.4		)	—
Release of restricted cash		—			—			—			—			4.4			—			—			4.4
Net cash provided by (used in) investing activities		(316.4		)	—			(297.9		)	18.5			(153.4		)	(0.1		)	595.8			(153.5		)
Cash flows from financing activities:
Issuance of common stock/partnership units		360.5			—			337.1			—			—			—			(337.1		)	360.5
IPO costs		(23.4		)	—			—			—			—			—			—			(23.4		)
Dividends paid		(20.7		)	—			(20.7		)	—			(20.7		)	—			41.4			(20.7		)
Payments on capital leases and other financing arrangements		—			—			—			—			(3.2		)	(0.5		)	—			(3.7		)
Payments to buyout capital leases		—			—			—			—			(9.6		)	—			—			(9.6		)
Payment to buyout other financing arrangement		—			—			—			—			(10.2		)	—			—			(10.2		)
Contributions (distributions) from parent guarantor		—			—			—			—			315.4			3.2			(318.6		)	—
Debt issuance costs		—			—			(1.3		)	(1.3		)	—			—			1.3			(1.3		)
Net cash provided by (used in) financing activities		316.4			—			315.1			(1.3		)	271.7			2.7			(613.0		)	291.6
Net increase (decrease) in cash and cash equivalents		—			—			(0.1		)	—			200.6			0.4			—			200.9
Cash and cash equivalents at beginning of period		—			—			0.1			—			11.2			1			—			12.3
Cash and cash equivalents at end of period		$	—		$	—		$	—		$	—		$	211.8		$	1.4		$	—		$	213.2
(dollars in millions)		Period Ended January 23, 2013
		Parent			General			LP			Finance			Guarantors			Non-			Eliminations			Total
		Guarantor			Partner			Co-issuer			Co-issuer						Guarantors
Net cash provided by operating activities		$	—		$	—		$	—		$	—		$	1.9		$	0.1		$	—		$	2
Cash flows from investing activities:
Capital expenditures - other		—			—			—			—			(7.7		)	—			—			(7.7		)
Release of restricted cash		—			—			—			—			1.9			—			—			1.9
Intercompany advances, net		—			—			0.1			—			(0.1		)	—			—			—
Net cash provided by (used in) investing activities		—			—			0.1			—			(5.9		)	—			—			(5.8		)
Cash flows from financing activities:
Payments on capital lease obligations		—			—			—			—			(0.6		)	—			—			(0.6		)
Contributions from parent, net		—			—			—			—			0.2			—			—			0.2
Net cash used in financing activities		—			—			—			—			(0.4		)	—			—			(0.4		)
Net increase (decrease) in cash and cash equivalents		—			—			0.1			—			(4.4		)	0.1			—			(4.2		)
Cash and cash equivalents at beginning of period		—			—			—			—			15.6			0.9			—			16.5
Cash and cash equivalents at end of period		$	—		$	—		$	0.1		$	—		$	11.2		$	1		$	—		$	12.3
(dollars in millions)		Nine Months Ended September 30, 2012
		Parent			General			LP			Finance			Guarantors			Non-			Eliminations			Total
		Guarantor			Partner			Co-issuer			Co-issuer						Guarantors
Net cash provided by operating activities		$	—		$	—		$	—		$	—		40.3			$	2.5		$	—		$	42.8
Cash flows from investing activities:
Capital expenditures - acquisitions of real estate		—			—			—			—			(25.4		)	—			—			(25.4		)
Capital expenditures - other		—			—			—			—			(120.2		)	(0.8		)	—			(121.0		)
Increase in restricted cash		—			—			—			—			(11.1		)	—			—			(11.1		)
Release of restricted cash		—			—			—			—			0.7			—			—			0.7
Advance to affiliate		—			—			—			—			(9.6		)	—			—			(9.6		)
Proceeds from sale of assets		—			—			—			—			0.2			—			—			0.2
Net cash used in investing activities		—			—			—			—			(165.4		)	(0.8		)	—			(166.2		)
Cash flows from financing activities:
Borrowings from affiliates, net		—			—			—			—			131.9			—			—			131.9
Payment on capital leases and other financing arrangements		—			—			—			—			(5.2		)	—			—			(5.2		)
Distributions to parent, net		—			—			—			—			(0.7		)	—			—			(0.7		)
Net cash provided by financing activities		—			—			—			—			126			—			—			126
Net increase in cash and cash equivalents		—			—			—			—			0.9			1.7			—			2.6
Cash and cash equivalents at beginning of period		—			—			—			—			0.4			0.2			—			0.6
Cash and cash equivalents at end of period		$	—		$	—		$	—		$	—		$	1.3		$	1.9		$	—		$	3.2
CyrusOne L.P. [Member]	'
Condensed Financial Statements, Captions [Line Items]	'
Guarantors	'
	Guarantors
	CyrusOne LP and CyrusOne Finance Corp., as “LP Co-issuer” and “Finance Co-issuer,” respectively (together, the “Issuers”), had $525 million aggregate principal amount of Senior Notes outstanding at September 30, 2013. The Senior Notes are fully and unconditionally and jointly and severally guaranteed on a senior basis by CyrusOne Inc. (“Parent Guarantor”), CyrusOne GP (“General Partner”), and CyrusOne LP’s 100% owned subsidiaries, CyrusOne LLC, CyrusOne TRS Inc. and CyrusOne Foreign Holdings LLC (such subsidiaries, together the “Guarantors”). None of the subsidiaries organized outside of the United States (collectively, the “Non-Guarantors”) guarantee the Senior Notes. Subject to the provisions of the indenture governing the Senior Notes, in certain circumstances, a Guarantor may be released from its guarantee obligation, including:
	•	upon the sale or other disposition (including by way of consolidation or merger) of such Guarantor or of all of the capital stock of such Guarantor such that such Guarantor is no longer a restricted subsidiary under the indenture,
	•	upon the sale or disposition of all or substantially all of the assets of the Guarantor,
	•	upon the LP Co-issuer designating such Guarantor as an unrestricted subsidiary under the terms of the indenture,
	•	if such Guarantor is no longer a guarantor or other obligor of any other indebtedness of the LP Co-issuer or the Parent Guarantor, and
	•	upon the defeasance or discharge of the Senior Notes in accordance with the terms of the indenture.
	The following provides information regarding the entity structure of each guarantor of the Senior Notes:
	CyrusOne Inc.—CyrusOne Inc. was formed on July 31, 2012. As of January 23, 2013, CyrusOne Inc. was a 100% owned subsidiary of CBI. Effective January 24, 2013, CyrusOne Inc. completed its IPO of common stock for net proceeds of $337.1 million, and together with the General Partner, purchased a 33.9% ownership interest in CyrusOne LP. CyrusOne Inc. also represents a guarantor or Parent Guarantor. In addition, CyrusOne Inc. became a separate registrant with the SEC upon completion of its IPO.
	CyrusOne GP—CyrusOne GP was formed on July 31, 2012, and was a 100% owned subsidiary of CyrusOne Inc. as of January 23, 2013. Effective upon completion of CyrusOne Inc.’s IPO, this entity became the general partner and 1% owner of CyrusOne LP and has no other assets or operations. Prior to the IPO, this entity did not incur any obligations or record any transactions.
	Issuers—The Issuers include CyrusOne LP and CyrusOne Finance Corp. CyrusOne Finance Corp., a 100% owned subsidiary of CyrusOne LP, was formed for the sole purpose of acting as co-issuer of the Senior Notes and has no other assets or operations. CyrusOne LP, in addition to being the co-issuer of the Senior Notes, is also the 100% owner, either directly or indirectly, of the Guarantors and Non-Guarantors.
	Guarantors—The guarantors include CyrusOne LLC, CyrusOne TRS Inc., and CyrusOne Foreign Holdings LLC. CyrusOne LLC accounts for all of the domestic operations of CyrusOne LP, including the businesses that composed the Predecessor operations. CyrusOne LLC, together with CyrusOne Foreign Holdings LLC, directly or indirectly owns 100% of the Non-Guarantors. As of September 30, 2013, CyrusOne TRS Inc. had not incurred any obligations or recorded any material transactions for the three months and period ended September 30, 2013.
	As of September 30, 2013, the Non-Guarantors consist of 100% owned subsidiaries which conduct operations in the United Kingdom and Singapore.
	The following schedules present the financial information for the three months ended September 30, 2013, period ended September 30, 2013, period ended January 23, 2013, and the three and nine months ended September 30, 2012, for the LP Co-issuer, Finance Co-issuer, Guarantors, and Non-Guarantors. The financial statements for the period ended January 23, 2013, present the financial information for the LP Co-issuer, Finance Co-issuer, Guarantors, and Non-Guarantors, prior to the effective date of the IPO. The financial statements for the three months and period ended September 30, 2013, present the financial information for the LP Co-issuer, Finance Co-issuer, Guarantors, and Non-Guarantors, after the effective date of the IPO. The consolidating schedules are provided in accordance with the reporting requirements for guarantor subsidiaries.
	Condensed Consolidating Balance Sheets
	(dollars in millions)		As of September 30, 2013
			LP			Finance			Guarantors			Non-			Eliminations			Total
			Co-issuer			Co-issuer						Guarantors
	Land		$	—		$	—		$	81.5		$	—		$	—		$	81.5
	Buildings and improvements		—			—			734.8			43.4			—			778.2
	Equipment		—			—			133.6			0.7			—			134.3
	Construction in progress		—			—			63.2			—			—			63.2
	Subtotal		—			—			1,013.10			44.1			—			1,057.20
	Accumulated depreciation		—			—			(214.6		)	(4.0		)	—			(218.6		)
	Net investment in real estate		—			—			798.5			40.1			—			838.6
	Cash and cash equivalents		—			—			211.8			1.4			—			213.2
	Investment in subsidiaries		814.7			—			0.3			—			(815.0		)	—
	Rent and other receivables		—			—			33.3			0.6			—			33.9
	Intercompany receivable		508.1			508.2			0.2			—			(1,016.5		)	—
	Goodwill		—			—			276.2			—			—			276.2
	Intangible assets, net		—			—			89.9			—			—			89.9
	Due from affiliates		—			—			0.9			—			—			0.9
	Other assets		15.5			15.5			49.8			1.9			(15.5		)	67.2
	Total assets		$	1,338.30		$	523.7		$	1,460.90		$	44		$	(1,847.0	)	$	1,519.90
	Accounts payable and accrued expenses		$	16.1		$	12.6		$	51.3		$	0.4		$	(12.6	)	$	67.8
	Deferred revenue		—			—			54.4			0.7			—			55.1
	Intercompany payable		—			—			508.1			0.2			(508.3		)	—
	Due to affiliates		6.8			—			0.2			—			—			7
	Capital lease obligations		—			—			10.4			8.4			—			18.8
	Long-term debt		525			525			—			—			(525.0		)	525
	Other financing arrangements		—			—			21.8			34			—			55.8
	Total liabilities		547.9			537.6			646.2			43.7			(1,045.9		)	729.5
	Partnership capital		790.4			(13.9		)	814.7			0.3			(801.1		)	790.4
	Total liabilities and partnership capital		$	1,338.30		$	523.7		$	1,460.90		$	44		$	(1,847.0	)	$	1,519.90
	(dollars in millions)		As of December 31, 2012
			LP			Finance			Guarantors			Non-			Eliminations			Total
			Co-issuer			Co-issuer						Guarantors
	Land		$	—		$	—		$	44.5		$	—		$	—		44.5
	Buildings and improvements		—			—			695.7			26.8			—			722.5
	Equipment		—			—			52			0.4			—			52.4
	Construction in progress		—			—			51.4			12.8			—			64.2
	Subtotal		—			—			843.6			40			—			883.6
	Accumulated depreciation		—			—			(174.8		)	(1.9		)	—			(176.7		)
	Net investment in real estate		—			—			668.8			38.1			—			706.9
	Cash and cash equivalents		—			—			15.6			0.9			—			16.5
	Investment in subsidiaries		497.2			—			0.4			—			(497.6		)	—
	Rent and other receivables		—			—			32.6			0.6			—			33.2
	Restricted cash		—			—			6.3			—			—			6.3
	Goodwill		—			—			276.2			—			—			276.2
	Intangible assets, net		—			—			102.6			—			—			102.6
	Intercompany receivable		508.2			508.2			—			—			(1,016.4		)	—
	Due from affiliates		—			—			2.2			—			—			2.2
	Other assets		17			17			41.6			0.5			(17.0		)	59.1
Total assets		$	1,022.40		$	525.2		$	1,146.30		$	40.1		$	(1,531.0	)	$	1,203.00
Accounts payable and accrued expenses		$	4.4		$	4.4		$	31.7		$	0.2		$	(4.4	)	36.3
Deferred revenue		—			—			52.3			0.5			—			52.8
Intercompany payable		—			—			508			0.2			(508.2		)	—
Due to affiliates		—			—			2.9			—			—			2.9
Capital lease obligations		—			—			23.2			9			—			32.2
Long-term debt		525			525			—			—			(525.0		)	525
Other financing arrangements		—			—			31			29.8			—			60.8
Total liabilities		529.4			529.4			649.1			39.7			(1,037.6		)	710
Total parent’s net investment		493			(4.2		)	497.2			0.4			(493.4		)	493
Total liabilities and parent’s net investment		$	1,022.40		$	525.2		$	1,146.30		$	40.1		$	(1,531.0	)	$	1,203.00
Condensed Consolidating Statements of Operations
(dollars in millions)	Three Months Ended September 30, 2013
		LP			Finance			Guarantors			Non-			Eliminations			Total
		Co-issuer			Co-issuer						Guarantors
Revenue		$	—		$	—		$	66.4		$	1.1		$	—		$	67.5
Costs and expenses:
Property operating expenses		—			—			23.7			0.5			—			24.2
Sales and marketing		—			—			2.2			0.1			—			2.3
General and administrative		—			—			7.1			0.1			—			7.2
Depreciation and amortization		—			—			23.2			0.7			—			23.9
Restructuring charges		—			—			0.7			—			—			0.7
Transaction costs		—			—			0.7			—			—			0.7
Total costs and expenses		—			—			57.6			1.4			—			59
Operating income (loss)		—			—			8.8			(0.3		)	—			8.5
Interest expense (income)		9.2			9.2			0.4			0.9			(9.2		)	10.5
Other income		—			—			(0.1		)	—			—			(0.1		)
Income (loss) before income taxes		(9.2		)	(9.2		)	8.5			(1.2		)	9.2			(1.9		)
Income tax expense		—			—			(0.3		)	—			—			(0.3		)
Equity earnings (loss) related to investment in subsidiaries		7			—			(1.2		)	—			(5.8		)	—
Income (loss) from continuing operations		(2.2		)	(9.2		)	7			(1.2		)	3.4			(2.2		)
Net income (loss)		$	(2.2	)	$	(9.2	)	$	7		$	(1.2	)	$	3.4		$	(2.2	)
(dollars in millions)		Three Months Ended September 30, 2012
		LP			Finance			Guarantors			Non-			Eliminations			Total
		Co-issuer			Co-issuer						Guarantors
Revenue		$	—		$	—		$	56.3		$	0.4		$	—		$	56.7
Costs and expenses:
Property operating expenses		—			—			19.5			0.5			—			20
Sales and marketing		—			—			2			0.1			—			2.1
General and administrative		—			—			5.2			0.1			—			5.3
Depreciation and amortization		—			—			18.2			0.6			—			18.8
Transaction costs		—			—			0.6			—			—			0.6
Management fees charged by CBI		—			—			0.9			—			—			0.9
Loss on sale of receivables to an affiliate		—			—			1.3			—			—			1.3
Total costs and expenses		—			—			47.7			1.3			—			49
Operating income (loss)		—			—			8.6			(0.9		)	—			7.7
Interest expense		—			—			10.2			1.1			—			11.3
Income (loss) before income taxes		—			—			(1.6		)	(2.0		)	—			(3.6		)
Income tax benefit		—			—			0.7			—			—			0.7
Equity earnings (loss) related to investments in subsidiaries		—			—			(2.0		)	—			2			—
Loss from continuing operations		—			—			(2.9		)	(2.0		)	2			(2.9		)
Gain on sale of real estate improvements		—			—			0.1			—			—			0.1
Net loss		$	—		$	—		$	(2.8	)	$	(2.0	)	$	2		$	(2.8	)
(dollars in millions)	Period Ended September 30, 2013
		LP			Finance			Guarantors			Non-			Eliminations			Total
		Co-issuer			Co-issuer						Guarantors
Revenue		$	—		$	—		$	173.4		$	2.7		$	—		$	176.1
Costs and expenses:
Property operating expenses		—			—			62.5			1.6			—			64.1
Sales and marketing		—			—			7.1			0.2			—			7.3
General and administrative		—			—			19.6			0.1			—			19.7
Depreciation and amortization		—			—			61.3			2			—			63.3
Restructuring charges		—			—			0.7			—			—			0.7
Transaction costs		—			—			1.1			—			—			1.1
Total costs and expenses		—			—			152.3			3.9			—			156.2
Operating income (loss)		—			—			21.1			(1.2		)	—			19.9
Interest expense (income)		26.5			26.5			1.3			1.9			(26.5		)	29.7
Other income		—			—			(0.1		)	—			—			(0.1		)
Loss on extinguishment of debt		—			—			1.3			—			—			1.3
Income (loss) before income taxes		(26.5		)	(26.5		)	18.6			(3.1		)	26.5			(11.0		)
Income tax expense		—			—			(0.8		)	—			—			(0.8		)
Equity earnings (loss) related to investment in subsidiaries		14.7			—			(3.1		)	—			(11.6		)	—
Income (loss) from continuing operations		(11.8		)	(26.5		)	14.7			(3.1		)	14.9			(11.8		)
Net income (loss)		$	(11.8	)	$	(26.5	)	$	14.7		$	(3.1	)	$	14.9		$	(11.8	)
(dollars in millions)		Period Ended January 23, 2013
		LP			Finance			Guarantors			Non-			Eliminations			Total
		Co-issuer			Co-issuer						Guarantors
Revenue		$	—		$	—		$	14.9		$	0.2		$	—		$	15.1
Costs and expenses:
Property operating expenses		—			—			4.8			—			—			4.8
Sales and marketing		—			—			0.7			—			—			0.7
General and administrative		—			—			1.4			0.1			—			1.5
Transaction-related compensation		—			—			20			—			—			20
Depreciation and amortization		—			—			5.2			0.1			—			5.3
Transaction costs		—			—			0.1			—			—			0.1
Total costs and expenses		—			—			32.2			0.2			—			32.4
Operating loss		—			—			(17.3		)	—			—			(17.3		)
Interest expense		2.3			2.3			0.1			0.1			(2.3		)	2.5
Loss before income taxes		(2.3		)	(2.3		)	(17.4		)	(0.1		)	2.3			(19.8		)
Income tax expense		—			—			(0.4		)	—			—			(0.4		)
Equity earnings (loss) related to investment in subsidiaries		(17.9		)	—			(0.1		)	—			18			—
Loss from continuing operations		(20.2		)	(2.3		)	(17.9		)	(0.1		)	20.3			(20.2		)
Net loss		$	(20.2	)	$	(2.3	)	$	(17.9	)	$	(0.1	)	$	20.3		$	(20.2	)
(dollars in millions)		Nine Months Ended September 30, 2012
		LP			Finance			Guarantors			Non-			Eliminations			Total
		Co-issuer			Co-issuer						Guarantors
Revenue		$	—		$	—		$	161.8		$	1		$	—		$	162.8
Costs and expenses
Property operating expenses		—			—			54			1.3			—			55.3
Sales and marketing		—			—			5.6			0.2			—			5.8
General and administrative		—			—			15.3			0.1			—			15.4
Depreciation and amortization		—			—			51.7			1.2			—			52.9
Transaction costs		—			—			1.3			—			—			1.3
Management fees charged by CBI		—			—			2.1			—			—			2.1
Loss on sale of receivables to an affiliate		—			—			3.7			—			—			3.7
Asset impairment		—			—			13.3			—			—			13.3
Total costs and expenses		—			—			147			2.8			—			149.8
Operating income (loss)		—			—			14.8			(1.8		)	—			13
Interest expense		—			—			28.9			2.3			—			31.2
Loss before income taxes		—			—			(14.1		)	(4.1		)	—			(18.2		)
Income tax benefit		—			—			4.7			—			—			4.7
Equity earnings (loss) related to investments in subsidiaries		—			—			(4.1		)	—			4.1			—
Loss from continuing operations		—			—			(13.5		)	(4.1		)	4.1			(13.5		)
Gain on sale of real estate improvements		—			—			0.1			—			—			0.1
Net loss		$	—		$	—		$	(13.4	)	$	(4.1	)	$	4.1		$	(13.4	)
Condensed Consolidating Statements of Cash Flows
(dollars in millions)		Period Ended September 30, 2013
		LP			Finance			Guarantors			Non-			Eliminations			Total
		Co-issuer			Co-issuer						Guarantors
Net cash provided by (used in) operating activities		(17.3		)	$	(17.2	)	$	82.3		$	(2.2	)	$	17.2		$	62.8
Cash flows from investing activities:
Capital expenditures - acquisitions of real estate		—			—			(33.3		)	—			—			(33.3		)
Capital expenditures - other		—			—			(124.5		)	(0.1		)	—			(124.6		)
Investment in subsidiaries		(337.1		)	—			—			—			337.1			—
Return of investment		39.2			18.5			—			—			(57.7		)	—
Intercompany advances, net		—			—			—			—			—			—
Release of restricted cash		—			—			4.4			—			—			4.4
Net cash provided by (used in) investing activities		(297.9		)	18.5			(153.4		)	(0.1		)	279.4			(153.5		)
Cash flows from financing activities:
Issuance of partnership units		337.1			—			—			—			—			337.1
Distributions paid		(20.7		)	—			(20.7		)	—			20.7			(20.7		)
Payments on capital leases and other financing arrangements		—			—			(3.2		)	(0.5		)	—			(3.7		)
Payments to buyout capital leases		—			—			(9.6		)	—			—			(9.6		)
Payment to buyout other financing arrangement		—			—			(10.2		)	—			—			(10.2		)
Contribution from parent, net		—			—			315.4			3.2			(318.6		)	—
Debt issuance costs		(1.3		)	(1.3		)	—			—			1.3			(1.3		)
Net cash provided by (used in) financing activities		315.1			(1.3		)	271.7			2.7			(296.6		)	291.6
Net increase (decrease) in cash and cash equivalents		(0.1		)	—			200.6			0.4			—			200.9
Cash and cash equivalents at beginning of period		0.1			—			11.2			1			—			12.3
Cash and cash equivalents at end of period		$	—		$	—		$	211.8		$	1.4		$	—		$	213.2
(dollars in millions)		Period Ended January 23, 2013
		LP			Finance			Guarantors			Non-			Eliminations			Total
		Co-issuer			Co-issuer						Guarantors
Net cash provided by operating activities		$	—		$	—		$	1.9		$	0.1		$	—		$	2
Cash flows from investing activities:
Capital expenditures - other		—			—			(7.7		)	—			—			(7.7		)
Release of restricted cash		—			—			1.9			—			—			1.9
Intercompany advances, net		0.1			—			(0.1		)	—			—			—
Net cash provided by (used in) investing activities		0.1			—			(5.9		)	—			—			(5.8		)
Cash flows from financing activities:
Payments on capital lease obligations		—			—			(0.6		)	—			—			(0.6		)
Contributions from parent, net		—			—			0.2			—			—			0.2
Net cash used in financing activities		—			—			(0.4		)	—			—			(0.4		)
Net increase (decrease) in cash and cash equivalents		0.1			—			(4.4		)	0.1			—			(4.2		)
Cash and cash equivalents at beginning of period		—			—			15.6			0.9			—			16.5
Cash and cash equivalents at end of period		$	0.1		$	—		$	11.2		$	1		$	—		$	12.3
(dollars in millions)		Nine Months Ended September 30, 2012
		LP			Finance			Guarantors			Non-			Eliminations			Total
		Co-issuer			Co-issuer						Guarantors
Net cash provided by operating activities		$	—		$	—		40.3			$	2.5		$	—		$	42.8
Cash flows from investing activities:
Capital expenditures - acquisitions of real estate		—			—			(25.4		)	—			—			(25.4		)
Capital expenditures - other		—			—			(120.2		)	(0.8		)	—			(121.0		)
Increase in restricted cash		—			—			(11.1		)	—			—			(11.1		)
Release of restricted cash		—			—			0.7			—			—			0.7
Advance to affiliate		—			—			(9.6		)	—			—			(9.6		)
Proceeds from sale of assets		—			—			0.2			—			—			0.2
Net cash used in investing activities		—			—			(165.4		)	(0.8		)	—			(166.2		)
Cash flows from financing activities:
Borrowings from affiliates, net		—			—			131.9			—			—			131.9
Payments on capital lease obligations		—			—			(5.2		)	—			—			(5.2		)
Distributions to parent, net		—			—			(0.7		)	—			—			(0.7		)
Net cash provided by financing activities		—			—			126			—			—			126
Net increase in cash and cash equivalents		—			—			0.9			1.7			—			2.6
Cash and cash equivalents at beginning of period		—			—			0.4			0.2			—			0.6
Cash and cash equivalents at end of period		$	—		$	—		$	1.3		$	1.9		$	—		$	3.2

Significant_Accounting_Policie1

Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2013
Summary Of Significant Accounting Policies [Line Items]	'
Restructuring Costs Policy [Text Block]	'
	Restructuring Charge—Restructuring charges are a result of programs planned and controlled by management that materially changes either the scope of business undertaken or the manner in which that business is conducted. Current restructuring charges were the result of moving certain administrative functions to the Company's corporate office. These charges are generally recognized in the period in which the liability is incurred.
Use of Estimates	'
	Use of Estimates—Preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. These estimates and assumptions are based on management’s knowledge of current events and actions that we may undertake in the future. Estimates are used in determining the fair value of leased real estate, the useful lives of real estate and other long-lived assets, future cash flows associated with goodwill and other long-lived asset impairment testing, deferred tax assets and liabilities and loss contingencies. Estimates were also utilized in the determination of historical allocations of shared employees’ payroll, benefits and incentives and management fees. Actual results may differ from these estimates and assumptions.
Investments in Real Estate	'
	Investments in Real Estate—Investments in real estate consist of land, buildings, improvements and integral equipment utilized in our data center operations. Real estate acquired from third parties has been recorded at its acquisition cost. Real estate acquired from CBI and its affiliates has been recorded at its historical cost basis. Additions and improvements which extend an asset’s useful life or increase its functionality are capitalized and depreciated over the asset’s remaining life. Maintenance and repairs are expensed as incurred.
	When we are involved in the construction of structural improvements to leased property, we are deemed the accounting owner of the leased real estate. In these instances, we bear substantially all the construction period risk, including managing or funding construction. These transactions generally do not qualify for sale-leaseback accounting due to our continued involvement in these data center operations. At inception, the fair value of the real estate, which generally consists of a building shell, and our associated obligation is recorded as construction in progress. As construction progresses, the value of the asset and obligation increases by the fair value of the structural improvements. When construction is complete, the asset is placed in service and depreciation commences. Leased real estate is depreciated to the lesser of (i) its estimated fair value at the end of the term or (ii) the expected amount of the unamortized obligation at the end of the term. The associated obligation is presented as other financing arrangements in the accompanying condensed consolidated balance sheets.
	When we are not deemed the accounting owner, we further evaluate leased real estate to determine whether the lease should be classified as a capital or operating lease. One of the following four characteristics must be present to classify a lease as a capital lease: (i) the lease transfers ownership of the property to the lessee by the end of the lease term, (ii) the lease contains a bargain purchase option, (iii) the lease term is equal to 75% or more of the estimated economic life of the leased property or (iv) the net present value of the lease payments are at least 90% of the fair value of the leased property.
	Construction in progress includes direct and indirect expenditures for the construction and expansion of our data centers and is stated at its acquisition cost. Independent contractors perform substantially all of the construction and expansion efforts of our data centers. Construction in progress includes costs incurred under construction contracts including project management services, engineering and schematic design services, design development, construction services and other construction-related fees and services. Interest, property taxes and certain labor costs are also capitalized during the construction of an asset.
Cash and Cash Equivalents	'
	Cash and Cash Equivalents—Cash and cash equivalents include all non-restricted cash held in financial institutions and other non-restricted highly liquid short-term investments with original maturities at acquisition of three months or less.
Restricted Cash	'
	Restricted Cash—Restricted cash consists of funds held in escrow to fund construction.
Goodwill	'
	Goodwill—Goodwill represents the excess of the purchase price over the fair value of net assets acquired in connection with business acquisitions. We perform impairment testing of goodwill, at the reporting unit level, on an annual basis or more frequently if indicators of potential impairment exist.
	The fair value of our reporting unit was determined using a combination of market-based valuation multiples for comparable businesses and discounted cash flow analysis based on internal financial forecasts incorporating market participant assumptions. There were no impairments recognized for any of the periods presented.
Long-Lived and Intangible Assets	'
	Long-Lived and Intangible Assets—Intangible assets represent purchased assets that lack physical substance, but can be separately distinguished from goodwill because of contractual or other legal rights or because the asset is capable of being sold or exchanged, either on its own or in combinations with a related contract, asset, or liability. Intangible assets with finite lives consist of trademarks, customer relationships, and a favorable leasehold interest.
	Management reviews the carrying value of long-lived assets, including intangible assets with finite lives, when events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. Examples of such indicators may include a significant adverse change in the extent to which or manner in which the property is being used, an accumulation of costs significantly in excess of the amount originally expected for acquisition or development, or a history of operating or cash flow losses. When such indicators exist, we review an estimate of the undiscounted future cash flows expected to result from the use of an asset (or group of assets) and its eventual disposition and compare such amount to its carrying amount. We consider factors such as future operating income, leasing demand, competition and other factors. If our undiscounted net cash flows indicate that we are unable to recover the carrying value of the asset, an impairment loss is recognized. An impairment loss is measured as the amount by which the asset’s carrying value exceeds its estimated fair value. There was an impairment of $13.3 million recognized for the nine months ended September 30, 2012, and no impairments recognized for any of the periods presented in 2013.
Deferred Costs	'
	Deferred Costs—Deferred costs include both deferred leasing costs and deferred financing costs. Deferred costs are presented with other assets in the accompanying condensed consolidated balance sheets. Leasing commissions incurred at the commencement of a new lease are capitalized and amortized over the term of the customer lease. Amortization of deferred leasing costs is presented with depreciation and amortization in the accompanying condensed consolidated statements of operations. If a lease terminates prior to the expected term of the lease, the remaining unamortized cost is written off to amortization expense.
	Deferred financing costs include costs incurred in connection with issuance of debt and the revolving credit agreement. These financing costs are capitalized and amortized over the term of the debt or revolving credit agreement and are included as a component of interest expense.
Other Financing Arrangements	'
	Other Financing Arrangements—Other financing arrangements represent leases of real estate where we are involved in the construction of structural improvements to develop buildings into data centers. When we bear substantially all the construction period risk, such as managing or funding construction, we are deemed to be the accounting owner of the leased property and, at the lease inception date, we are required to record at fair value the property and associated liability on our condensed consolidated balance sheet. These transactions generally do not qualify for sale-leaseback accounting due to our continued involvement in these data center operations.
Revenue Recognition	'
	Revenue Recognition—Colocation rentals are generally billed monthly in advance, and some contracts have escalating payments over the term of the contract. If rents escalate without the lessee gaining access to or control over additional leased space or power, and the lessee takes possession of, or controls the physical use of the property (including all contractually committed power) at the beginning of the lease term, the rental payments by the lessee are recognized as revenue on a straight-line basis over the term of the lease. If rents escalate because the lessee gains access to and control over additional leased space or power, revenue is recognized in proportion to the additional space or power in the years that the lessee has control over the use of the additional space or power. The excess of revenue recognized over amounts contractually due is recognized in other assets in the accompanying condensed consolidated balance sheets.
	Some of our leases are structured on a full-service gross basis in which the customer pays a fixed amount for both colocation rental and power. Other leases provide that the customer will be billed for power based upon actual usage which is separately metered. In both cases, this revenue is presented on a gross basis in the accompanying condensed consolidated statements of operations. Power is generally billed one month in arrears, and an estimate of this revenue is accrued in the month that the associated costs are incurred. We generally are not entitled to reimbursements for real estate taxes, insurance or other operating expenses.
	Revenue is recognized for services or products that are deemed separate units of accounting. When a customer makes an advance payment, which is not deemed a separate unit of accounting, deferred revenue is recorded. This revenue is recognized ratably over the expected term of the lease, unless the pattern of service suggests otherwise.
	Certain customer contracts require specified levels of service or performance. If we fail to meet these service levels, our customers may be eligible to receive credits on their contractual billings. These credits are recognized against revenue when an event occurs that gives rise to such credits.
Property Operating Expenses	'
	Property Operating Expenses—Property operating expenses generally consist of electricity, salaries and benefits of data center operations personnel, real estate taxes, security, rent, insurance and other site operating and maintenance costs.
Sales and Marketing Expense	'
	Sales and Marketing Expense—Sales and marketing expense is comprised of compensation and benefits associated with sales and marketing personnel as well as advertising and marketing costs.
General and Administrative Expense	'
	General and Administrative Expense—General and administrative expense is comprised of salaries and benefits of senior employees and support functions, such as legal, accounting, and professional service fees.
Depreciation and Amortization Expense	'
	Depreciation and Amortization Expense—Depreciation expense is recognized over the estimated useful lives of real estate applying the straight-line method. The useful life of leased real estate and leasehold improvements is the lesser of the economic useful life of the asset or the term of the lease, including optional renewal periods if renewal of the lease is reasonably assured. The residual value of leased real estate is estimated as the lesser of (i) the expected fair value of the asset at the end of the lease term or (ii) the expected amount of the unamortized liability at the end of the lease term. Estimated useful lives are periodically reviewed.
	Amortization expense is recognized over the estimated useful lives of finite-lived intangibles. An accelerated method of amortization is utilized to amortize our customer relationship intangible, consistent with the benefit expected to be derived from this asset. We amortize trademarks, favorable leasehold interests and deferred leasing costs over their estimated useful lives. The estimated useful life of trademarks and customer relationships is eight to 15 years. In addition, we have a favorable leasehold interest related to a land lease that is being amortized over the remaining lease term of 56 years.
Transaction-related Compensation	'
	Transaction-Related Compensation —During the period ended January 23, 2013, the Company received an allocated compensation charge from CBI of $20.0 million for the settlement of its long-term incentive plan associated with the completion of the IPO. The amount was determined by CBI and allocated to CyrusOne Inc. on January 23, 2013, and reflected as expense and contributed capital in the respective period.
Transaction Costs	'
	Transaction Costs—Transaction costs represent legal, accounting and professional fees incurred in connection with the formation transactions, our qualification as a REIT, completed and potential business combinations, and costs incurred to pursue additional property purchases. Transaction costs are expensed as incurred.
Income Taxes	'
	Income Taxes—The Company was included in CBI’s consolidated tax returns in various jurisdictions for all Predecessor periods. In the accompanying financial statements, the Predecessor periods reflect income taxes as if the Company was a separate stand-alone company. The income tax provision consists of an amount for taxes currently payable and an amount for tax consequences deferred to future periods.
	CyrusOne Inc. will elect to be taxed as a REIT under the Code, as amended, commencing with our taxable year ending December 31, 2013. Provided we qualify for taxation as a REIT and continue to meet the various qualification tests mandated under the Code, we are generally not subject to corporate level federal income tax on the earnings distributed currently to our shareholders. If we fail to qualify as a REIT in any taxable year, our taxable income will be subject to federal income tax at regular corporate rates and any applicable alternative minimum tax.
	While CyrusOne Inc. and the Operating Partnership do not pay federal income taxes, we are still subject to foreign, state and local income taxes in the locations in which it conducts business. Our taxable REIT subsidiaries (each a “TRS”) are also subject to federal and state income taxes to the extent there is taxable income.
	Deferred income taxes are recognized in certain entities. Deferred income taxes are provided for temporary differences in the bases between financial statement and income tax assets and liabilities. Deferred income taxes are recalculated annually at rates then in effect. Valuation allowances are recorded to reduce deferred tax assets to amounts that are more likely than not to be realized. The ultimate realization of the deferred tax assets depends upon our ability to generate future taxable income during the periods in which basis differences and other deductions become deductible and prior to the expiration of the net operating loss carryforwards.
	The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction as well as various foreign, state and local jurisdictions.  The Company's previous tax filings are subject to normal reviews by regulatory agencies until the related statute of limitations expires.  With a few exceptions, the Company is no longer subject to U. S. federal, state or local examinations for years prior to 2009.
Foreign Currency Translation and Transactions	'
	Foreign Currency Translation and Transactions—The financial position of foreign subsidiaries is translated at the exchange rates in effect at the end of the period, while revenues and expenses are translated at average rates of exchange during the period. Gains or losses from translation of foreign operations where the local currency is the functional currency are included as components of other comprehensive loss. Gains or losses from foreign currency transactions are included in determining net income. Gains and losses from translation and foreign currency transactions were immaterial for all periods presented.
Comprehensive Income (Loss)	'
	Comprehensive Income (Loss)—Comprehensive income (loss) represents the change in net assets of a company from transactions and other events from non-owner sources. Comprehensive income (loss) comprises all components of net income and all components of other comprehensive income.
Stock-Based Compensation	'
	Stock-Based Compensation—For all the Predecessor periods presented, some of our employees participated in CBI’s stock-based compensation plans. CBI valued all share-based payments to employees at fair value on the date of grant and expensed this amount over the applicable vesting period. The fair value of stock options and stock appreciation rights was determined using the Black-Scholes option-pricing model using assumptions such as volatility, risk-free interest rate, holding period and expected dividends. The fair value of stock awards was based upon the closing market price of CBI’s common stock on the date of grant. For all share-based awards, a forfeiture rate was estimated based upon historical forfeiture patterns. The forfeiture rate reduced the total fair value of the awards that was recognized as compensation expense. For graded vesting awards, CBI’s policy was to recognize compensation expense on a straight-line basis over the vesting period. Certain employees were granted awards, which were indexed to the change in CBI’s common stock price. The accompanying condensed consolidated financial statements include an allocation of stock-based compensation costs for awards granted to our employees. Upon completion of the IPO, all awards were either terminated and settled by CBI with each respective employee or vesting was accelerated.
	In conjunction with the IPO, our Board of Directors adopted the 2012 Long-Term Incentive Plan (“LTIP”). See further discussion in Note 10.
Fair Value Measurements	'
	Fair Value Measurements—Fair value measurements are utilized in accounting for business combinations and testing of goodwill and other long-lived assets for impairment and disclosures. Fair value of financial and non-financial assets and liabilities is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. The three-tier hierarchy for inputs used in measuring fair value, which prioritizes the inputs used in the methodologies of measuring fair value for assets and liabilities, is as follows:
	Level 1—Observable inputs for identical instruments such as quoted market prices;
	Level 2—Inputs include quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (i.e., interest rates, yield curves, etc.), and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs); and
	Level 3—Unobservable inputs that reflect our determination of assumptions that market participants would use in pricing the asset or liability. These inputs are developed based on the best information available, including our own data.
Business Segments	'
	Business Segments—Business segments are components of an enterprise for which separate financial information is available and regularly viewed by the chief operating decision maker to assess performance and allocate resources. Our chief operating decision maker reviews our financial information on an aggregate basis. Furthermore, our data centers have similar economic characteristics and customers across all geographic locations, our service offerings have similar production processes, deliver services in a similar manner and use the same types of facilities and similar technologies. As a result, we have concluded that we have one reportable business segment.
Earnings Per Share	'
	Earnings Per Share—For all periods subsequent to January 23, 2013, we present earnings per share (“EPS”) data. Basic EPS includes only the weighted average number of common shares outstanding during the period. Diluted EPS includes the weighted average number of common shares and the dilutive effect of stock options, restricted stock and share unit awards and convertible subordinated notes outstanding during the period, when such instruments are dilutive.
	All outstanding unvested share-based payment awards that contain rights to nonforfeitable dividends are treated as participating in undistributed earnings with common shareholders. Awards of this nature are considered participating securities and the two-class method of computing basic and diluted EPS must be applied.
CyrusOne L.P. [Member]	'
Summary Of Significant Accounting Policies [Line Items]	'
Restructuring Costs Policy [Text Block]	'
	Restructuring Charge—Restructuring charges are a result of programs planned and controlled by management that materially changes either the scope of business undertaken or the manner in which that business is conducted. Current restructuring charges were the result of moving certain administrative functions to the Company's corporate office. These charges are generally recognized in the period in which the liability is incurred.
Use of Estimates	'
	Use of Estimates—Preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. These estimates and assumptions are based on management’s knowledge of current events and actions that we may undertake in the future. Estimates are used in determining the fair value of leased real estate, the useful lives of real estate and other long-lived assets, future cash flows associated with goodwill and other long-lived asset impairment testing, deferred tax assets and liabilities and loss contingencies. Estimates were also utilized in the determination of historical allocations of shared employees’ payroll, benefits and incentives and management fees. Actual results may differ from these estimates and assumptions.
Investments in Real Estate	'
	Investments in Real Estate—Investments in real estate consist of land, buildings, improvements and integral equipment utilized in our data center operations. Real estate acquired from third parties has been recorded at its acquisition cost. Real estate acquired from CBI and its affiliates has been recorded at its historical cost basis. Additions and improvements which extend an asset’s useful life or increase its functionality are capitalized and depreciated over the asset’s remaining life. Maintenance and repairs are expensed as incurred.
	When we are involved in the construction of structural improvements to leased property, we are deemed the accounting owner of the leased real estate. In these instances, we bear substantially all the construction period risk, including managing or funding construction. These transactions generally do not qualify for sale-leaseback accounting due to our continued involvement in these data center operations. At inception, the fair value of the real estate, which generally consists of a building shell, and our associated obligation is recorded as construction in progress. As construction progresses, the value of the asset and obligation increases by the fair value of the structural improvements. When construction is complete, the asset is placed in service and depreciation commences. Leased real estate is depreciated to the lesser of (i) its estimated fair value at the end of the term or (ii) the expected amount of the unamortized obligation at the end of the term. The associated obligation is presented as other financing arrangements in the accompanying condensed consolidated balance sheets.
	When we are not deemed the accounting owner, we further evaluate leased real estate to determine whether the lease should be classified as a capital or operating lease. One of the following four characteristics must be present to classify a lease as a capital lease: (i) the lease transfers ownership of the property to the lessee by the end of the lease term, (ii) the lease contains a bargain purchase option, (iii) the lease term is equal to 75% or more of the estimated economic life of the leased property or (iv) the net present value of the lease payments are at least 90% of the fair value of the leased property.
	Construction in progress includes direct and indirect expenditures for the construction and expansion of our data centers and is stated at its acquisition cost. Independent contractors perform substantially all of the construction and expansion efforts of our data centers. Construction in progress includes costs incurred under construction contracts including project management services, engineering and schematic design services, design development, construction services and other construction-related fees and services. Interest, property taxes and certain labor costs are also capitalized during the construction of an asset.
Cash and Cash Equivalents	'
	Cash and Cash Equivalents—Cash and cash equivalents include all non-restricted cash held in financial institutions and other non-restricted highly liquid short-term investments with original maturities at acquisition of three months or less.
Restricted Cash	'
	Restricted Cash—Restricted cash consists of funds held in escrow to fund construction.
Goodwill	'
	Goodwill—Goodwill represents the excess of the purchase price over the fair value of net assets acquired in connection with business acquisitions. We perform impairment testing of goodwill, at the reporting unit level, on an annual basis or more frequently if indicators of potential impairment exist.
	The fair value of our reporting unit was determined using a combination of market-based valuation multiples for comparable businesses and discounted cash flow analysis based on internal financial forecasts incorporating market participant assumptions. There were no impairments recognized for any of the periods presented.
Long-Lived and Intangible Assets	'
	Long-Lived and Intangible Assets—Intangible assets represent purchased assets that lack physical substance, but can be separately distinguished from goodwill because of contractual or other legal rights or because the asset is capable of being sold or exchanged, either on its own or in combinations with a related contract, asset, or liability. Intangible assets with finite lives consist of trademarks, customer relationships, and a favorable leasehold interest.
	Management reviews the carrying value of long-lived assets, including intangible assets with finite lives, when events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. Examples of such indicators may include a significant adverse change in the extent to which or manner in which the property is being used, an accumulation of costs significantly in excess of the amount originally expected for acquisition or development, or a history of operating or cash flow losses. When such indicators exist, we review an estimate of the undiscounted future cash flows expected to result from the use of an asset (or group of assets) and its eventual disposition and compare such amount to its carrying amount. We consider factors such as future operating income, leasing demand, competition and other factors. If our undiscounted net cash flows indicate that we are unable to recover the carrying value of the asset, an impairment loss is recognized. An impairment loss is measured as the amount by which the asset’s carrying value exceeds its estimated fair value. There was an impairment of $13.3 million recognized for the nine months ended September 30, 2012, and no impairments recognized for any of the periods presented in 2013.
Deferred Costs	'
	Deferred Costs—Deferred costs include both deferred leasing costs and deferred financing costs. Deferred costs are presented with other assets in the accompanying condensed consolidated balance sheets. Leasing commissions incurred at the commencement of a new lease are capitalized and amortized over the term of the customer lease. Amortization of deferred leasing costs is presented with depreciation and amortization in the accompanying condensed consolidated statements of operations. If a lease terminates prior to the expected term of the lease, the remaining unamortized cost is written off to amortization expense.
	Deferred financing costs include costs incurred in connection with issuance of debt and the revolving credit agreement. These financing costs are capitalized and amortized over the term of the debt or revolving credit agreement and are included as a component of interest expense.
Other Financing Arrangements	'
	Other Financing Arrangements—Other financing arrangements represent leases of real estate where we are involved in the construction of structural improvements to develop buildings into data centers. When we bear substantially all the construction period risk, such as managing or funding construction, we are deemed to be the accounting owner of the leased property and, at the lease inception date, we are required to record at fair value the property and associated liability on our condensed consolidated balance sheet. These transactions generally do not qualify for sale-leaseback accounting due to our continued involvement in these data center operations.
Revenue Recognition	'
	Revenue Recognition—Colocation rentals are generally billed monthly in advance, and some contracts have escalating payments over the term of the contract. If rents escalate without the lessee gaining access to or control over additional leased space or power, and the lessee takes possession of, or controls the physical use of the property (including all contractually committed power) at the beginning of the lease term, the rental payments by the lessee are recognized as revenue on a straight-line basis over the term of the lease. If rents escalate because the lessee gains access to and control over additional leased space or power, revenue is recognized in proportion to the additional space or power in the years that the lessee has control over the use of the additional space or power. The excess of revenue recognized over amounts contractually due is recognized in other assets in the accompanying condensed consolidated balance sheets.
	Some of our leases are structured on a full-service gross basis in which the customer pays a fixed amount for both colocation rental and power. Other leases provide that the customer will be billed for power based upon actual usage which is separately metered. In both cases, this revenue is presented on a gross basis in the accompanying condensed consolidated statements of operations. Power is generally billed one month in arrears, and an estimate of this revenue is accrued in the month that the associated costs are incurred. We generally are not entitled to reimbursements for real estate taxes, insurance or other operating expenses.
	Revenue is recognized for services or products that are deemed separate units of accounting. When a customer makes an advance payment, which is not deemed a separate unit of accounting, deferred revenue is recorded. This revenue is recognized ratably over the expected term of the lease, unless the pattern of service suggests otherwise.
	Certain customer contracts require specified levels of service or performance. If we fail to meet these service levels, our customers may be eligible to receive credits on their contractual billings. These credits are recognized against revenue when an event occurs that gives rise to such credits.
Property Operating Expenses	'
	Property Operating Expenses—Property operating expenses generally consist of electricity, salaries and benefits of data center operations personnel, real estate taxes, security, rent, insurance and other site operating and maintenance costs.
Sales and Marketing Expense	'
	Sales and Marketing Expense—Sales and marketing expense is comprised of compensation and benefits associated with sales and marketing personnel as well as advertising and marketing costs.
General and Administrative Expense	'
	General and Administrative Expense—General and administrative expense is comprised of salaries and benefits of senior employees and support functions, such as legal, accounting, and professional service fees.
Depreciation and Amortization Expense	'
	Depreciation and Amortization Expense—Depreciation expense is recognized over the estimated useful lives of real estate applying the straight-line method. The useful life of leased real estate and leasehold improvements is the lesser of the economic useful life of the asset or the term of the lease, including optional renewal periods if renewal of the lease is reasonably assured. The residual value of leased real estate is estimated as the lesser of (i) the expected fair value of the asset at the end of the lease term or (ii) the expected amount of the unamortized liability at the end of the lease term. Estimated useful lives are periodically reviewed.
	Amortization expense is recognized over the estimated useful lives of finite-lived intangibles. An accelerated method of amortization is utilized to amortize our customer relationship intangible, consistent with the benefit expected to be derived from this asset. We amortize trademarks, favorable leasehold interests and deferred leasing costs over their estimated useful lives. The estimated useful life of trademarks and customer relationships is eight to 15 years. In addition, we have a favorable leasehold interest related to a land lease that is being amortized over the remaining lease term of 56 years.
Transaction-related Compensation	'
	Transaction-Related Compensation—During the period ended January 23, 2013, the Company received an allocated compensation charge from CBI of $20.0 million for the settlement of its long-term incentive plan associated with the completion of the IPO. The amount was determined by CBI and allocated to the Operating Partnership on January 23, 2013 and reflected as expense and contributed capital in the respective period.
Transaction Costs	'
	Transaction Costs—Transaction costs represent legal, accounting and professional fees incurred in connection with the formation transactions, potential business combinations, and costs incurred to pursue additional property purchases. Transaction costs are expensed as incurred.
Income Taxes	'
	Income Taxes—Various wholly-owned subsidiaries of the Company were included in CBI’s consolidated tax returns in various jurisdictions for all Predecessor periods. In the accompanying financial statements, the Predecessor periods reflect income taxes as if the Company was a separate stand-alone company. The income tax provision consists of an amount for taxes currently payable and an amount for tax consequences deferred to future periods.
	Deferred income taxes are recognized in certain entities. Deferred income taxes are provided for temporary differences in the bases between financial statement and income tax assets and liabilities. Deferred income taxes are recalculated annually at rates then in effect. Valuation allowances are recorded to reduce deferred tax assets to amounts that are more likely than not to be realized. The ultimate realization of the deferred tax assets depends upon our ability to generate future taxable income during the periods in which basis differences and other deductions become deductible and prior to the expiration of the net operating loss carryforwards.
	The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction as well as various foreign, state and local jurisdictions.  The Company's previous tax filings are subject to normal reviews by regulatory agencies until the related statute of limitations expires.  With a few exceptions, the Company is no longer subject to U. S. federal, state or local examinations for years prior to 2009.
Foreign Currency Translation and Transactions	'
	Foreign Currency Translation and Transactions—The financial position of foreign subsidiaries is translated at the exchange rates in effect at the end of the period, while revenues and expenses are translated at average rates of exchange during the period. Gains or losses from translation of foreign operations where the local currency is the functional currency are included as components of other comprehensive loss. Gains or losses from foreign currency transactions are included in determining net income. Gains and losses from translation and foreign currency transactions were immaterial for all periods presented.
Comprehensive Income (Loss)	'
	Comprehensive Loss—Comprehensive income (loss) represents the change in net assets of a company from transactions and other events from non-owner sources.
Stock-Based Compensation	'
	Stock-Based Compensation—For all the Predecessor periods presented, some of our employees participated in CBI’s stock-based compensation plans. CBI valued all share-based payments to employees at fair value on the date of grant and expensed this amount over the applicable vesting period. The fair value of stock options and stock appreciation rights was determined using the Black-Scholes option-pricing model using assumptions such as volatility, risk-free interest rate, holding period and expected dividends. The fair value of stock awards was based upon the closing market price of CBI’s common stock on the date of grant. For all share-based awards, a forfeiture rate was estimated based upon historical forfeiture patterns. The forfeiture rate reduced the total fair value of the awards that was recognized as compensation expense. For graded vesting awards, CBI’s policy was to recognize compensation expense on a straight-line basis over the vesting period. Certain employees were granted awards, which were indexed to the change in CBI’s common stock price. The accompanying condensed consolidated financial statements include an allocation of stock-based compensation costs for awards granted to our employees. Upon completion of CyrusOne Inc.'s IPO, all awards were either terminated and settled by CBI with each respective employee or vesting was accelerated.
	In conjunction with CyrusOne Inc.'s IPO, the Board of Directors of CyrusOne Inc. adopted the 2012 Long-Term Incentive Plan (“LTIP”). See further discussion in Note 9.
Fair Value Measurements	'
	Fair Value Measurements—Fair value measurements are utilized in accounting for business combinations and testing of goodwill and other long-lived assets for impairment. Fair value of financial and non-financial assets and liabilities is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. The three-tier hierarchy for inputs used in measuring fair value, which prioritizes the inputs used in the methodologies of measuring fair value for assets and liabilities, is as follows:
	Level 1—Observable inputs for identical instruments such as quoted market prices;
	Level 2—Inputs include quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (i.e., interest rates, yield curves, etc.), and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs); and
	Level 3—Unobservable inputs that reflect our determination of assumptions that market participants would use in pricing the asset or liability. These inputs are developed based on the best information available, including our own data.
Business Segments	'
	Business Segments—Business segments are components of an enterprise for which separate financial information is available and regularly viewed by the chief operating decision maker to assess performance and allocate resources. Our chief operating decision maker reviews our financial information on an aggregate basis. Furthermore, our data centers have similar economic characteristics and customers across all geographic locations, our service offerings have similar production processes, deliver services in a similar manner and use the same types of facilities and similar technologies. As a result, we have concluded that we have one reportable business segment.

Investment_in_Real_Estate_Tabl

Investment in Real Estate (Tables)	9 Months Ended
	Sep. 30, 2013
Real Estate Properties [Line Items]	'
Schedule of Gross Investment in Real Estate	'
	A schedule of our gross investment in real estate follows:
		Successor						Predecessor
		September 30, 2013						December 31, 2012
	(dollars in millions)	Land		Building and		Equipment		Land		Building and		Equipment
				Improvements						Improvements
	West Seventh St., Cincinnati, OH (7th Street)	$	0.9	$	108.9	$	7.3	$	0.9	$	108.7	$	0.8
	Parkway Dr., Mason, OH (Mason)	—		20.3		0.5		—		20.2		0.4
	Industrial Rd., Florence, KY (Florence)	8.8		34.5		2.2		—		46.8		0.5
	Goldcoast Dr., Cincinnati, OH (Goldcoast)	0.6		6.7		0.1		0.6		6.7		—
	Knightsbridge Dr., Hamilton, OH (Hamilton)	—		49.2		3.5		—		49.9		2.1
	E. Monroe St., South Bend, IN (Monroe St.)	—		2.5		—		—		3.2		—
	Springer St., Lombard, IL (Lombard)	1.3		4		0.2		—		2.6		—
	Crescent Circle, South Bend, IN (Blackthorn)	—		3.4		0.1		—		3.3		0.1
	Kingsview Dr., Lebanon, OH (Lebanon)	4		71.4		1.7		4		71		1.1
	McAuley Place, Blue Ash, OH (Blue Ash)	—		0.6		—		—		0.6		—
	Westway Park Blvd., Houston, TX (Houston West 1)	1.4		88.4		21.4		3.3		87.8		12
	Westway Park Blvd., Houston, TX (Houston West 2)	2		20.9		14.5		—		—		—
	N. Sam Houston Pky., Houston, TX (Houston-MetroNational)	18.3		—		—		—		—		—
	Southwest Fwy., Houston, TX (Galleria)	—		68.7		12.1		—		66		6.6
	E. Ben White Blvd., Austin, TX (Austin 1)	—		22.5		1.1		—		22.6		0.8
	S. State Highway 121 Business, Lewisville, TX (Lewisville)	—		77		19.5		—		76		9.6
	Marsh Lane, Carrollton, TX	—		0.1		0.4		—		0.1		0.2
	Midway Rd., Carrollton, TX	—		2		0.4		—		2		0.3
	W. Frankford Rd., Carrollton, TX (Carrollton)	16.1		41.3		13.2		16.1		34.6		5
	Bryan St., Dallas, TX	—		0.1		0.1		—		0.1		—
	North Freeway, Houston, TX (Greenspoint)	—		1.3		0.4		—		1.3		0.4
	South Ellis Street, Chandler, AZ (Phoenix)	14.8		55.9		9.8		15		38.7		6.8
	Westover Hills Blvd., San Antonio, TX (San Antonio 1)	4.6		32		23.6		4.6		30.8		4.7
	Westover Hills Blvd., San Antonio, TX (San Antonio 2)	6.7		—		—		—		—		—
	Metropolis Dr., Austin, TX (Austin 2)	2		23		1.5		—		22.7		0.6
	Kestral Way (London)	—		34		0.6		—		17.1		0.3
	Jurong East (Singapore)	—		9.5		0.1		—		9.7		0.1
	Total	$	81.5	$	778.2	$	134.3	$	44.5	$	722.5	$	52.4
CyrusOne L.P. [Member]	'
Real Estate Properties [Line Items]	'
Schedule of Gross Investment in Real Estate	'
	A schedule of our gross investment in real estate follows:
		Successor						Predecessor
		September 30, 2013						December 31, 2012
	(dollars in millions)	Land		Building and		Equipment		Land		Building and		Equipment
				Improvements						Improvements
	West Seventh St., Cincinnati, OH (7th Street)	$	0.9	$	108.9	$	7.3	$	0.9	$	108.7	$	0.8
	Parkway Dr., Mason, OH (Mason)	—		20.3		0.5		—		20.2		0.4
	Industrial Rd., Florence, KY (Florence)	8.8		34.5		2.2		—		46.8		0.5
	Goldcoast Dr., Cincinnati, OH (Goldcoast)	0.6		6.7		0.1		0.6		6.7		—
	Knightsbridge Dr., Hamilton, OH (Hamilton)	—		49.2		3.5		—		49.9		2.1
	E. Monroe St., South Bend, IN (Monroe St.)	—		2.5		—		—		3.2		—
	Springer St., Lombard, IL (Lombard)	1.3		4		0.2		—		2.6		—
	Crescent Circle, South Bend, IN (Blackthorn)	—		3.4		0.1		—		3.3		0.1
	Kingsview Dr., Lebanon, OH (Lebanon)	4		71.4		1.7		4		71		1.1
	McAuley Place, Blue Ash, OH (Blue Ash)	—		0.6		—		—		0.6		—
	Westway Park Blvd., Houston, TX (Houston West 1)	1.4		88.4		21.4		3.3		87.8		12
	Westway Park Blvd., Houston, TX (Houston West 2)	2		20.9		14.5		—		—		—
	N. Sam Houston Pky., Houston, TX (Houston-MetroNational)	18.3		—		—		—		—		—
	Southwest Fwy., Houston, TX (Galleria)	—		68.7		12.1		—		66		6.6
	E. Ben White Blvd., Austin, TX (Austin 1)	—		22.5		1.1		—		22.6		0.8
	S. State Highway 121 Business, Lewisville, TX (Lewisville)	—		77		19.5		—		76		9.6
	Marsh Lane, Carrollton, TX	—		0.1		0.4		—		0.1		0.2
	Midway Rd., Carrollton, TX	—		2		0.4		—		2		0.3
	W. Frankford Rd., Carrollton, TX (Carrollton)	16.1		41.3		13.2		16.1		34.6		5
	Bryan St., Dallas, TX	—		0.1		0.1		—		0.1		—
	North Freeway, Houston, TX (Greenspoint)	—		1.3		0.4		—		1.3		0.4
	South Ellis Street, Chandler, AZ (Phoenix)	14.8		55.9		9.8		15		38.7		6.8
	Westover Hills Blvd., San Antonio, TX (San Antonio 1)	4.6		32		23.6		4.6		30.8		4.7
	Westover Hills Blvd., San Antonio, TX (San Antonio 2)	6.7		—		—		—		—		—
	Metropolis Dr., Austin, TX (Austin 2)	2		23		1.5		—		22.7		0.6
	Kestral Way (London)	—		34		0.6		—		17.1		0.3
	Jurong East (Singapore)	—		9.5		0.1		—		9.7		0.1
	Total	$	81.5	$	778.2	$	134.3	$	44.5	$	722.5	$	52.4

Debt_and_Other_Financing_Arran1

Debt and Other Financing Arrangements (Tables)	9 Months Ended
	Sep. 30, 2013
Debt Instrument [Line Items]	'
Debt and Capital Lease Obligations	'
	The Company’s outstanding debt and other financing arrangements consists of the following:
		Successor		Predecessor
	(dollars in millions)	30-Sep-13		31-Dec-12
	Revolving credit agreement	$	—	$	—
	Capital lease obligations	18.8		32.2
	6 3/8% Senior Notes due 2022	525		525
	Other financing arrangements	55.8		60.8
	Total	$	599.6	$	618
CyrusOne L.P. [Member]	'
Debt Instrument [Line Items]	'
Debt and Capital Lease Obligations	'
	The Company’s outstanding debt and other financing arrangements consists of the following:
		Successor		Predecessor
	(dollars in millions)	30-Sep-13		31-Dec-12
	Revolving credit agreement	$	—	$	—
	Capital lease obligations	18.8		32.2
	6 3/8% Senior Notes due 2022	525		525
	Other financing arrangements	55.8		60.8
	Total	$	599.6	$	618

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'
Carrying Value and Fair Value of Other Financial Instruments	'
	The carrying value and fair value of other financial instruments are as follows:
		Successor				Predecessor
		September 30, 2013				December 31, 2012
	(dollars in millions)	Carrying Value		Fair Value		Carrying Value		Fair Value
	6 3/8% Senior Notes due 2022	$	525	$	525	$	525	$	547.3
	Other financing arrangements	55.8		63.4		60.8		69.5
CyrusOne L.P. [Member]	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'
Carrying Value and Fair Value of Other Financial Instruments	'
	The carrying value and fair value of other financial instruments are as follows:
						Predecessor
		September 30, 2013				December 31, 2012
	(dollars in millions)	Carrying Value		Fair Value		Carrying Value		Fair Value
	6 3/8% Senior Notes due 2022	$	525	$	525	$	525	$	547.3
	Other financing arrangements	55.8		63.4		60.8		69.5

Loss_per_Share_Tables

Loss per Share (Tables)	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Computation of Basic and Diluted Net Income (Loss) Per Share	'
	The following table reflects a reconciliation of the shares used in the basic and diluted net loss per share computation for the period ended September 30, 2013:
		Three Months Ended						Period Ended
		30-Sep-13						30-Sep-13
	(dollars in millions, except per share amount)	Basic			Diluted			Basic			Diluted
	Numerator:
	Net loss attributed to common shareholders	$	(0.8	)	$	(0.8	)	$	(4.0	)	$	(4.0	)
	Less: Restricted stock dividends	(0.2		)	(0.2		)	(0.5		)	(0.5		)
	Net loss available to shareholders	$	(1.0	)	$	(1.0	)	$	(4.5	)	$	(4.5	)
	Denominator:
	Weighted average common outstanding-basic	20.9			20.9			20.9			20.9
	Performance-based restricted stock(1)				—						—
	Convertible securities(1)				—						—
	Weighted average shares outstanding-diluted				20.9						20.9
	EPS:
	Net loss per share-basic	$	(0.05	)				$	(0.22	)
	Effect of dilutive shares
	Net loss per share-diluted				$	(0.05	)				$	(0.22	)
	(1) We have excluded 0.2 million of restricted stock, and 42.6 million of Operating Partnership units which are securities convertible into common stock in January 2014, from our diluted earnings per share as of September 30, 2013. These amounts were deemed anti-dilutive.

Related_Party_Transactions_Tab

Related Party Transactions (Tables)	9 Months Ended
	Sep. 30, 2013
Related Party Transaction [Line Items]	'
Schedule of Related Party Transactions	'
	Revenues and expenses for the periods presented were as follows:
		Successor		Successor		Predecessor
	(dollars in millions)	Three Months Ended September 30, 2013		January 24, 2013 to September 30, 2013		January 1, 2013 to January 23, 2013
	Revenue:
	Data center colocation agreement provided to CBT and CBTS	$	1.1	$	3.1	$	0.3
	229 West 7th Street lease provided to CBT	0.1		0.2		—
	Goldcoast Drive lease provided to CBT	—		0.1		—
	Parkway (Mason) lease provided to CBTS	0.1		0.2		—
	Transition services provided to CBTS (network interfaces)	0.7		1.4		0.1
	Data center leases provided to CBTS	0.4		3.8		—
	Total revenue	$	2.4	$	8.8	$	0.4
	Operating costs and expenses:
	Charges for services provided by CBT (connectivity)	0.9		1.6		0.1
	Allocated employee benefit plans by CBI	—		—		0.2
	Allocated centralized insurance costs by CBI	—		—		0.1
	General and administrative services provided by CBI	—		—		0.1
	Total operating costs and expenses	$	0.9	$	1.6	$	0.5
	As of September 30, 2013, and December 31, 2012, the amounts receivable and payable to CBI were as follows:
		Successor		Predecessor
		As of		As of
	(dollars in millions)	September 30, 2013		December 31, 2012
	Accounts receivable from CBI	$	0.9	$	2.2
	Accounts payable	$	0.2	$	2.9
	Dividends payable	6.8		—
	Accounts payable to CBI	$	7	$	2.9
CyrusOne L.P. [Member]	'
Related Party Transaction [Line Items]	'
Schedule of Related Party Transactions	'
	Revenues and expenses for the periods presented were as follows:
		Successor		Successor		Predecessor
	(dollars in millions)	Three Months Ended September 30, 2013		January 24, 2013 to September 30, 2013		January 1, 2013 to January 23, 2013
	Revenue:
	Data center colocation agreement provided to CBT and CBTS	$	1.1	$	3.1	$	0.3
	229 West 7th Street lease provided to CBT	0.1		0.2		—
	Goldcoast Drive lease provided to CBT	—		0.1		—
	Parkway (Mason) lease provided to CBTS	0.1		0.2		—
	Transition services provided to CBTS (network interfaces)	0.7		1.4		0.1
	Data center leases provided to CBTS	0.4		3.8		—
	Total revenue	$	2.4	$	8.8	$	0.4
	Operating costs and expenses:
	Charges for services provided by CBT (connectivity)	0.9		1.6		0.1
	Allocated employee benefit plans by CBI	—		—		0.2
	Allocated centralized insurance costs by CBI	—		—		0.1
	General and administrative services provided by CBI	—		—		0.1
	Total operating costs and expenses	$	0.9	$	1.6	$	0.5
	As of September 30, 2013, and December 31, 2012, the amounts receivable and payable to CBI were as follows:
		Successor		Predecessor
		As of		As of
	(dollars in millions)	September 30, 2013		December 31, 2012
	Accounts receivable from CBI	$	0.9	$	2.2
	Accounts payable	$	0.2	$	2.9
	Dividends payable	6.8		—
	Accounts payable to CBI	$	7	$	2.9

Description_of_Business_Additi

Description of Business - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013
	Center
Description Of Business [Line Items]	'
Number of data operating centers	25
CyrusOne L.P. [Member]	'
Description Of Business [Line Items]	'
Number of data operating centers	25

Formation_Additional_Informati

Formation - Additional Information (Detail) (USD $)

0 Months Ended

0 Months Ended

0 Months Ended

In Millions, except Share data, unless otherwise specified

Jan. 25, 2013

Jan. 25, 2013

Jan. 25, 2013

Nov. 20, 2012

Sep. 30, 2013

Jan. 23, 2013

Sep. 30, 2013

Jan. 23, 2013

Jan. 25, 2013

Nov. 20, 2012

Sep. 30, 2013

Jan. 25, 2013

Jan. 23, 2013

Sep. 30, 2013

Jan. 23, 2013

IPO [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne Inc. and CyrusOne GP [Member]

Cincinnati Bell Inc. [Member]

Cincinnati Bell Inc. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

IPO [Member]

CyrusOne Inc. and CyrusOne GP [Member]

Cincinnati Bell Inc. [Member]

Cincinnati Bell Inc. [Member]

Business Formation [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Partnership units issued to CyrusOne Inc.

'

'

'

123,688,687

'

'

'

'

'

123,688,687

'

'

'

'

'

Common stock share issuance under initial public offering (in shares)

400,000

19,000,000

'

'

'

'

'

'

400,000

'

'

19,000,000

'

'

'

Amount received from initial public offering of common stock, net of underwriter's discount

'

$337.10

'

'

'

'

'

'

'

'

'

$337.10

'

'

'

Reverse unit split executed

'

'

2.8

'

'

'

'

'

2.8

'

'

'

'

'

'

Operating partnership units owned

'

'

44,100,000

'

'

'

'

'

44,100,000

'

'

'

'

'

'

Partnership units exchanged

1,500,000

'

'

'

'

'

'

'

1,500,000

'

'

'

'

'

'

Proceeds from partnership units exchanged

1,500,000

'

'

'

'

'

'

'

1,500,000

'

'

'

'

'

'

Number of common shares issued to directors and employees

1,000,000

'

'

'

'

'

'

'

1,000,000

'

'

'

'

'

'

Total number of outstanding units

'

'

'

'

64,700,000

'

'

'

'

'

64,700,000

'

'

'

'

Shares purchased of Operating partnership's units

'

'

'

'

'

21,900,000

'

'

'

'

'

'

21,900,000

'

'

Combined interest held on completion of transactions

'

'

'

'

'

33.90%

'

'

'

'

'

'

33.90%

'

'

Purchase of Operating partnership's units

'

'

'

'

'

$337.10

'

'

'

'

'

'

$337.10

'

'

Remaining combined interest held

'

'

'

'

'

'

'

66.10%

'

'

'

'

'

'

66.10%

Ownership percentage

'

'

'

'

'

'

65.80%

'

'

'

'

'

'

65.80%

'

Significant_Accounting_Policie2

Significant Accounting Policies - Additional Information (Detail) (USD $)

9 Months Ended

1 Months Ended

9 Months Ended

3 Months Ended

8 Months Ended

3 Months Ended

8 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

1 Months Ended

9 Months Ended

Sep. 30, 2013

Sep. 30, 2013

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Jan. 23, 2013

Sep. 30, 2012

Sep. 30, 2012

Jan. 23, 2013

Sep. 30, 2012

Sep. 30, 2012

Jan. 23, 2013

Jan. 23, 2013

Sep. 30, 2012

CyrusOne L.P. [Member]

Cincinnati Bell Inc. [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

Trademarks and Customer Relationships [Member]

Trademarks and Customer Relationships [Member]

Trademarks and Customer Relationships [Member]

Trademarks and Customer Relationships [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

Cincinnati Bell Inc. [Member]

Predecessor [Member]

Predecessor [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

Summary Of Significant Accounting Policies [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of lease term

75.00%

75.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of lease payment

90.00%

90.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Impairments amount recognized

$0

$0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Useful life of finite-lived intangible assets

'

'

'

'8 years

'8 years

'15 years

'15 years

'

'

'

'

'

'

'

'

'

'

'

'

'

Lease term of favorable leasehold interest which being amortized

'56 years

'56 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Transaction-related compensation

'

'

20,000,000

'

'

'

'

0

0

0

0

20,000,000

0

0

20,000,000

0

0

20,000,000

20,000,000

'

Asset impairments

'

'

'

'

'

'

'

$0

$0

$0

$0

$0

$0

$13,300,000

$0

$0

$13,300,000

'

'

$13,300,000

Investment_in_Real_Estate_Sche

Investment in Real Estate - Schedule of Gross Investment in Real Estate (Detail) (USD $)

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

In Millions, unless otherwise specified

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

West Seventh St., Cincinnati, OH (7th Street) [Member]

Parkway Dr., Mason, OH (Mason) [Member]

Industrial Rd., Florence, KY (Florence) [Member]

Goldcoast Dr., Cincinnati, OH (Goldcoast) [Member]

Knightsbridge Dr., Hamilton, OH (Hamilton) [Member]

E. Monroe St., South Bend, IN (Monroe St.) [Member]

Springer St., Lombard, IL (Lombard) [Member]

Crescent Circle, South Bend, IN (Blackthorn) [Member]

Kingsview Dr., Lebanon, OH (Lebanon) [Member]

McAuley Place, Blue Ash, OH (Blue Ash) [Member]

Westway Park Blvd., Houston, TX (Houston West) [Member]

Westway Park Blvd., Houston, TX (Houston West 2) [Member]

Houston, TX (Houston-MetroNational) [Member]

Southwest Fwy., Houston, TX (Galleria) [Member]

E. Ben White Blvd., Austin, TX (Austin 1) [Member]

S. State Highway 121 Business Lewisville, TX (Lewisville) [Member]

Marsh Lane Carrollton, TX [Member]

Midway Rd., Carrollton, TX [Member]

Frankford Carrollton, TX [Member]

Bryan St., Dallas, TX [Member]

North Freeway, Houston, TX (Greenspoint) [Member]

South Ellis Street Chandler, AZ (Phoenix) [Member]

Westover Hills Blvd, San Antonio, TX (San Antonio) [Member]

Westover Hills Blvd San Antonio 2 [Member]

Metropolis Dr., Austin, TX (Austin 2) [Member]

Kestral Way (London) [Member]

Jurong East (Singapore) [Member]

West Seventh St., Cincinnati, OH (7th Street) [Member]

Parkway Dr., Mason, OH (Mason) [Member]

Industrial Rd., Florence, KY (Florence) [Member]

Goldcoast Dr., Cincinnati, OH (Goldcoast) [Member]

Knightsbridge Dr., Hamilton, OH (Hamilton) [Member]

E. Monroe St., South Bend, IN (Monroe St.) [Member]

Springer St., Lombard, IL (Lombard) [Member]

Crescent Circle, South Bend, IN (Blackthorn) [Member]

Kingsview Dr., Lebanon, OH (Lebanon) [Member]

McAuley Place, Blue Ash, OH (Blue Ash) [Member]

Westway Park Blvd., Houston, TX (Houston West) [Member]

Westway Park Blvd., Houston, TX (Houston West 2) [Member]

Houston, TX (Houston-MetroNational) [Member]

Southwest Fwy., Houston, TX (Galleria) [Member]

E. Ben White Blvd., Austin, TX (Austin 1) [Member]

S. State Highway 121 Business Lewisville, TX (Lewisville) [Member]

Marsh Lane Carrollton, TX [Member]

Midway Rd., Carrollton, TX [Member]

Frankford Carrollton, TX [Member]

Bryan St., Dallas, TX [Member]

North Freeway, Houston, TX (Greenspoint) [Member]

South Ellis Street Chandler, AZ (Phoenix) [Member]

Westover Hills Blvd, San Antonio, TX (San Antonio) [Member]

Westover Hills Blvd San Antonio 2 [Member]

Metropolis Dr., Austin, TX (Austin 2) [Member]

Kestral Way (London) [Member]

Jurong East (Singapore) [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

West Seventh St., Cincinnati, OH (7th Street) [Member]

Parkway Dr., Mason, OH (Mason) [Member]

Industrial Rd., Florence, KY (Florence) [Member]

Goldcoast Dr., Cincinnati, OH (Goldcoast) [Member]

Knightsbridge Dr., Hamilton, OH (Hamilton) [Member]

E. Monroe St., South Bend, IN (Monroe St.) [Member]

Springer St., Lombard, IL (Lombard) [Member]

Crescent Circle, South Bend, IN (Blackthorn) [Member]

Kingsview Dr., Lebanon, OH (Lebanon) [Member]

McAuley Place, Blue Ash, OH (Blue Ash) [Member]

Westway Park Blvd., Houston, TX (Houston West) [Member]

Westway Park Blvd., Houston, TX (Houston West 2) [Member]

Houston, TX (Houston-MetroNational) [Member]

Southwest Fwy., Houston, TX (Galleria) [Member]

E. Ben White Blvd., Austin, TX (Austin 1) [Member]

S. State Highway 121 Business Lewisville, TX (Lewisville) [Member]

Marsh Lane Carrollton, TX [Member]

Midway Rd., Carrollton, TX [Member]

Frankford Carrollton, TX [Member]

Bryan St., Dallas, TX [Member]

North Freeway, Houston, TX (Greenspoint) [Member]

South Ellis Street Chandler, AZ (Phoenix) [Member]

Westover Hills Blvd, San Antonio, TX (San Antonio) [Member]

Westover Hills Blvd San Antonio 2 [Member]

Metropolis Dr., Austin, TX (Austin 2) [Member]

Kestral Way (London) [Member]

Jurong East (Singapore) [Member]

West Seventh St., Cincinnati, OH (7th Street) [Member]

Parkway Dr., Mason, OH (Mason) [Member]

Industrial Rd., Florence, KY (Florence) [Member]

Goldcoast Dr., Cincinnati, OH (Goldcoast) [Member]

Knightsbridge Dr., Hamilton, OH (Hamilton) [Member]

E. Monroe St., South Bend, IN (Monroe St.) [Member]

Springer St., Lombard, IL (Lombard) [Member]

Crescent Circle, South Bend, IN (Blackthorn) [Member]

Kingsview Dr., Lebanon, OH (Lebanon) [Member]

McAuley Place, Blue Ash, OH (Blue Ash) [Member]

Westway Park Blvd., Houston, TX (Houston West) [Member]

Westway Park Blvd., Houston, TX (Houston West 2) [Member]

Houston, TX (Houston-MetroNational) [Member]

Southwest Fwy., Houston, TX (Galleria) [Member]

E. Ben White Blvd., Austin, TX (Austin 1) [Member]

S. State Highway 121 Business Lewisville, TX (Lewisville) [Member]

Marsh Lane Carrollton, TX [Member]

Midway Rd., Carrollton, TX [Member]

Frankford Carrollton, TX [Member]

Bryan St., Dallas, TX [Member]

North Freeway, Houston, TX (Greenspoint) [Member]

South Ellis Street Chandler, AZ (Phoenix) [Member]

Westover Hills Blvd, San Antonio, TX (San Antonio) [Member]

Westover Hills Blvd San Antonio 2 [Member]

Metropolis Dr., Austin, TX (Austin 2) [Member]

Kestral Way (London) [Member]

Jurong East (Singapore) [Member]

Real Estate Properties [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Land

$81.50

$0.90

$0

$8.80

$0.60

$0

$0

$1.30

$0

$4

$0

$1.40

$2

$18.30

$0

$0

$0

$0

$0

$16.10

$0

$0

$14.80

$4.60

$6.70

$2

$0

$0

$44.50

$0.90

$0

$0

$0.60

$0

$0

$0

$0

$4

$0

$3.30

$0

$0

$0

$0

$0

$0

$0

$16.10

$0

$0

$15

$4.60

$0

$0

$0

$0

$81.50

$0.90

$0

$8.80

$0.60

$0

$0

$1.30

$0

$4

$0

$1.40

$2

$18.30

$0

$0

$0

$0

$0

$16.10

$0

$0

$14.80

$4.60

$6.70

$2

$0

$0

$44.50

$0.90

$0

$0

$0.60

$0

$0

$0

$0

$4

$0

$3.30

$0

$0

$0

$0

$0

$0

$0

$16.10

$0

$0

$15

$4.60

$0

$0

$0

$0

Building and Improvements

778.2

108.9

20.3

34.5

6.7

49.2

2.5

4

3.4

71.4

0.6

88.4

20.9

0

68.7

22.5

77

0.1

2

41.3

0.1

1.3

55.9

32

0

23

34

9.5

722.5

108.7

20.2

46.8

6.7

49.9

3.2

2.6

3.3

71

0.6

87.8

0

0

66

22.6

76

0.1

2

34.6

0.1

1.3

38.7

30.8

0

22.7

17.1

9.7

778.2

108.9

20.3

34.5

6.7

49.2

2.5

4

3.4

71.4

0.6

88.4

20.9

0

68.7

22.5

77

0.1

2

41.3

0.1

1.3

55.9

32

0

23

34

9.5

722.5

108.7

20.2

46.8

6.7

49.9

3.2

2.6

3.3

71

0.6

87.8

0

0

66

22.6

76

0.1

2

34.6

0.1

1.3

38.7

30.8

0

22.7

17.1

9.7

Equipment

$134.30

$7.30

$0.50

$2.20

$0.10

$3.50

$0

$0.20

$0.10

$1.70

$0

$21.40

$14.50

$0

$12.10

$1.10

$19.50

$0.40

$0.40

$13.20

$0.10

$0.40

$9.80

$23.60

$0

$1.50

$0.60

$0.10

$52.40

$0.80

$0.40

$0.50

$0

$2.10

$0

$0

$0.10

$1.10

$0

$12

$0

$0

$6.60

$0.80

$9.60

$0.20

$0.30

$5

$0

$0.40

$6.80

$4.70

$0

$0.60

$0.30

$0.10

$134.30

$7.30

$0.50

$2.20

$0.10

$3.50

$0

$0.20

$0.10

$1.70

$0

$21.40

$14.50

$0

$12.10

$1.10

$19.50

$0.40

$0.40

$13.20

$0.10

$0.40

$9.80

$23.60

$0

$1.50

$0.60

$0.10

$52.40

$0.80

$0.40

$0.50

$0

$2.10

$0

$0

$0.10

$1.10

$0

$12

$0

$0

$6.60

$0.80

$9.60

$0.20

$0.30

$5

$0

$0.40

$6.80

$4.70

$0

$0.60

$0.30

$0.10

Investment_in_Real_Estate_Addi

Investment in Real Estate - Additional Information (Detail) (USD $)

8 Months Ended

0 Months Ended

1 Months Ended

3 Months Ended

8 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

8 Months Ended

0 Months Ended

8 Months Ended

0 Months Ended

1 Months Ended

3 Months Ended

8 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

0 Months Ended

8 Months Ended

0 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2013

3-May-13

3-May-13

Jun. 18, 2013

Jun. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Jan. 23, 2013

Sep. 30, 2012

Sep. 30, 2012

Dec. 31, 2012

Sep. 30, 2013

3-May-13

Sep. 30, 2013

3-May-13

Jun. 18, 2013

Jun. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Jan. 23, 2013

Sep. 30, 2012

Sep. 30, 2012

Dec. 31, 2012

3-May-13

3-May-13

3-May-13

3-May-13

3-May-13

3-May-13

3-May-13

3-May-13

Sep. 30, 2013

Jun. 18, 2013

Aug. 07, 2013

Jun. 18, 2013

Jun. 18, 2013

Jun. 18, 2013

Aug. 07, 2013

Springer Street (Lombard) [Member]

Industrial Road (Florence) [Member]

Metropolis Dr. (Austin 2) [Member]

Land [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

Capital Lease Obligations [Member]

Capital Lease Obligations [Member]

Capital Lease Obligations [Member]

Capital Lease Obligations [Member]

Land and Building [Member]

Land and Building [Member]

Land and Building [Member]

Land and Building [Member]

Land and Building [Member]

Land [Member]

Land [Member]

Land [Member]

Capital Lease Obligations [Member]

Capital Lease Obligations [Member]

Subsequent Event [Member]

Houston West [Member]

Springer St., Lombard, IL (Lombard) [Member]

Industrial Rd., Florence, KY (Florence) [Member]

Springer Street (Lombard) [Member]

Springer Street (Lombard) [Member]

Industrial Road (Florence) [Member]

Metropolis Dr. (Austin 2) [Member]

Land [Member]

Successor [Member]

Successor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Springer Street (Lombard) [Member]

Industrial Road (Florence) [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

Springer Street (Lombard) [Member]

Industrial Road (Florence) [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

Metropolis Dr. (Austin 2) [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

Metropolis Dr. (Austin 2) [Member]

CyrusOne L.P. [Member]

acre

acre

Houston West [Member]

Springer Street (Lombard) [Member]

Industrial Road (Florence) [Member]

Springer Street (Lombard) [Member]

Industrial Road (Florence) [Member]

Industrial Road (Florence) [Member]

Metropolis Dr. (Austin 2) [Member]

Metropolis Dr. (Austin 2) [Member]

Metropolis Dr. (Austin 2) [Member]

acre

acre

Real Estate Properties [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cost of construction in progress

'

'

'

'

'

$63.20

$63.20

'

'

'

'

'

$64.20

'

'

'

'

'

'

$63.20

$63.20

'

'

'

$64.20

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Area of Land

'

'

'

'

33

'

'

'

'

'

'

'

'

'

'

'

'

'

33

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

22

'

'

'

22

Purchase price

'

5.5

10.5

'

18.2

'

'

'

'

'

'

'

'

'

5.5

'

10.5

'

18.2

'

'

'

'

'

'

2.8

6.8

2.8

6.8

2.7

3.7

2.7

3.7

'

2

'

2

'

'

'

Extinguishment of debt

'

'

'

12.2

'

'

'

'

'

'

'

'

'

'

'

'

'

12.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

8.9

8.9

'

Loss on extinguishment of debt

'

'

'

-1.3

'

0

1.3

'

'

0

0

0

'

'

'

'

'

-1.3

'

0

1.3

0

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Acqusition of land for future data expansion

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

6.7

'

'

'

6.7

Property, Plant and Equipment, Useful Life

'25 years

'

'

'

'

'

'

'

'

'

'

'

'

'25 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Adjusted net carrying value

'

'

'

'

'

'

'

$0.10

$7.90

'

'

'

'

'

'

$0.10

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$7.90

'

'

'

'

'

'

Debt_and_Other_Financing_Arran2

Debt and Other Financing Arrangements - Debt and Capital Lease Obligations (Detail) (USD $)

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Nov. 20, 2012

Sep. 30, 2013

Nov. 20, 2012

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Dec. 31, 2012

In Millions, unless otherwise specified

Successor [Member]

Successor [Member]

Predecessor [Member]

Predecessor [Member]

Capital Lease Obligations [Member]

Capital Lease Obligations [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

Successor [Member]

Predecessor [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

Successor [Member]

Successor [Member]

Predecessor [Member]

Predecessor [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument Period For Redemption After Closing Of Equity Offering Before Specified Date Five

'

'

'

'

'

'

'

'90 days

'

'

'

'

'

Revolving credit agreement

$0

$0

$0

$0

'

'

'

'

'

'

'

'

'

Capital lease obligations

18.8

18.8

32.2

32.2

18.8

32.2

'

'

'

'

'

'

'

6 3/8% Senior Notes due 2022

525

525

525

525

'

'

525

'

'

525

525

525

525

Other financing arrangements

55.8

55.8

60.8

60.8

'

'

'

'

'

'

'

'

'

Total

$599.60

$599.60

$618

$618

'

'

'

'

'

'

'

'

'

Senior Notes interest rate

'

'

'

'

'

'

6.38%

'

6.38%

6.38%

6.38%

6.38%

6.38%

Debt_and_Other_Financing_Arran3

Debt and Other Financing Arrangements - Additional Information (Detail) (USD $)

1 Months Ended

3 Months Ended

8 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

8 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

8 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

8 Months Ended

9 Months Ended

9 Months Ended

0 Months Ended

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Nov. 20, 2012

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Nov. 20, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Aug. 07, 2013

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

Maximum [Member]

Maximum [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Letter of Credit [Member]

Letter of Credit [Member]

Swing Line Loans [Member]

Swing Line Loans [Member]

Base Rate Borrowings [Member]

Base Rate Borrowings [Member]

LIBOR Borrowings [Member]

LIBOR Borrowings [Member]

Land [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

Cyrus One Lp And Cyrus One Finance Corp [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

Metropolis Dr. (Austin 2) [Member]

CyrusOne L.P. [Member]

acre

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Area of Land

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

22

Acqusition of land for future data expansion

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$6,700,000

Credit agreement amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

225,000,000

'

225,000,000

'

50,000,000

50,000,000

30,000,000

30,000,000

'

'

'

'

'

Outstanding borrowings on revolving credit agreement

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

0

'

'

'

'

'

'

'

'

'

Net leverage ratio

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.50%

2.50%

3.50%

3.50%

'

Shareholders cash dividends in an amount not to exceed

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

95.00%

95.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

Commitment fees

'

'

'

'

0.50%

'

'

'

'

0.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest expense on capital lease obligations

300,000

1,600,000

2,200,000

4,600,000

'

5,500,000

300,000

2,200,000

4,600,000

'

5,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Issuing a note payable

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

525,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Senior Notes interest rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

6.38%

'

'

'

'

'

6.38%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest expense on senior notes

'

'

'

'

'

'

'

'

'

'

'

2,100,000

8,300,000

22,900,000

0

'

2,100,000

8,300,000

22,900,000

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of redemption price

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of senior notes declining redemption

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

103.19%

'

'

103.19%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of senior notes declining redemption

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

102.13%

'

'

102.13%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of senior notes declining redemption

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

101.16%

'

'

101.06%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of senior notes declining redemption

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of Redemption of the aggregate principal

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

35.00%

'

'

35.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of equity offering on principal amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

106.38%

'

'

106.38%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of Redemption of the least aggregate principal

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

65.00%

'

'

65.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of Redemption occurs

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'90 days

'

'

'90 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred financing costs

'

15,500,000

'

15,500,000

15,500,000

'

'

15,500,000

15,500,000

15,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amortization of deferred financing costs

$100,000

$500,000

'

$2,800,000

'

$0

$100,000

$500,000

$2,800,000

'

$0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total unencumbered assets

'

'

'

'

150.00%

'

'

'

'

150.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Shareholders cash dividends in amount not to exceed

'

'

'

'

95.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments - Carrying Value and Fair Value of Other Financial Instruments (Detail) (USD $)

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Nov. 20, 2012

Nov. 20, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

In Millions, unless otherwise specified

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

CyrusOne L.P. [Member]

Carrying Value [Member]

Fair Value [Member]

Fair Value [Member]

CyrusOne L.P. [Member]

Carrying Value [Member]

Carrying Value [Member]

Fair Value [Member]

Fair Value [Member]

CyrusOne L.P. [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

Carrying Value [Member]

Carrying Value [Member]

Fair Value [Member]

Fair Value [Member]

CyrusOne L.P. [Member]

Carrying Value [Member]

Carrying Value [Member]

Fair Value [Member]

Fair Value [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

6 3/8% Senior Notes due 2022

$525

$525

'

'

'

$525

$525

'

'

'

'

$525

'

$525

$525

$525

$525

$525

$525

$525

$525

$525

$525

$547.30

$547.30

Other financing arrangements

$55.80

$55.80

$55.80

$63.40

$63.40

$60.80

$60.80

$60.80

$60.80

$69.50

$69.50

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Senior Notes interest rate

'

'

'

'

'

'

'

'

'

'

'

6.38%

6.38%

6.38%

6.38%

'

'

'

'

6.38%

6.38%

'

'

'

'

Noncontrolling_Interest_Additi

Noncontrolling Interest - Additional Information (Detail) (USD $)	9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2013	Jun. 28, 2013
Noncontrolling Interest [Line Items]	'	'
Partnership units, conversion basis into common stock (in shares)	1	'
Redemption value of noncontrolling interests	$809	'
Redemption value of noncontrolling interests based on closing price (usd per share)	'	$19
CyrusOne Inc. and CyrusOne GP [Member]	'	'
Noncontrolling Interest [Line Items]	'	'
Number of outstanding partnership units purchased	21,900,000	'
Percentage of outstanding partnership units purchased	33.90%	'
Cincinnati Bell Inc. [Member]	'	'
Noncontrolling Interest [Line Items]	'	'
Percentage of retained ownership	66.10%	'
Number of operating partnership units owned	42,600,000	'
Ownership percentage	65.80%	'

Shareholders_Equity_Partnershi1

Shareholders' Equity / Partnership Capital - Additional Information (Detail) (USD $)	0 Months Ended
In Millions, except Per Share data, unless otherwise specified	Jun. 04, 2013
Schedule Of Stockholders Equity [Line Items]	'
Cash dividend payable to stockholders (in dollars per share)	$0.16
Distribution received (in dollars per share)	$0.16
CyrusOne L.P. [Member]	'
Schedule Of Stockholders Equity [Line Items]	'
Dividends payable	$10.30
Cash dividend payable to stockholders (in dollars per share)	$0.16

Equity_Incentive_Plan_Addition

Equity Incentive Plan - Additional Information (Detail) (USD $)	3 Months Ended	8 Months Ended	9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term	'	'	'	'2 years 6 months
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms	'	'	'	'2 years 3 months 18 days
2012 LTIP Plan [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Shares reserved for future issuance (in shares)	4	4	4	'
2012 LTIP Plan [Member] | CyrusOne L.P. [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Shares reserved for future issuance (in shares)	4	4	4	'
Restricted Shares [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Issuance of restricted shares (in shares)	'	'	1	'
Vesting period of restricted stock	'	'	'3 years	'
Restricted shares issued as common stock (in dollars per share)	'	'	$19	'
Compensation expense	$1.60	$4.30	'	'
Unrecognized compensation expense	14.7	14.7	14.7	'
Restricted Shares [Member] | CyrusOne L.P. [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Issuance of restricted shares (in shares)	'	'	1	'
Vesting period of restricted stock	'	'	'3 years	'
Restricted shares issued as common stock (in dollars per share)	'	'	$19	'
Compensation expense	1.6	4.3	'	'
Unrecognized compensation expense	14.7	14.7	14.7	'
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms	'	'	'	'2 years 3 months 18 days
Performance Based Shares [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Vesting period of restricted stock	'	'	'3 years	'
Compensation expense	0.3	'	'	'
Unrecognized compensation expense	3.2	3.2	3.2	'
Target achievement percentage	100.00%	100.00%	100.00%	'
Performance Based Shares [Member] | CyrusOne L.P. [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Compensation expense	0.3	0.6	'	'
Unrecognized compensation expense	$3.20	$3.20	$3.20	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term	'	'	'	'2 years 6 months
Target achievement percentage	100.00%	100.00%	100.00%	'

Loss_per_Share_Computation_of_

Loss per Share - Computation of Basic and Diluted Net Income (Loss) Per Share (Detail) (USD $)	3 Months Ended		8 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2013
Successor [Member]	'		'
Numerator:	'		'
Net loss attributed to common shareholders	($0.80)		($4)
Less: Restricted stock dividends	-0.2		-0.5
Net loss available to stockholders	($1)		($4.50)
Denominator:	'		'
Weighted average common outstanding - basic (in shares)	20.9		20.9
Time-based restricted stock (in shares)	0	[1]	0	[1]
Convertible securities (in shares)	0	[1]	0	[1]
Weighted average shares outstanding- diluted (in shares)	20.9		20.9
EPS:	'		'
Net loss per share- basic (in dollars per share)	($0.05)		($0.22)
Loss per share - diluted (in dollars per share)	($0.05)		($0.22)
Restricted Shares [Member]	'		'
Earnings Per Share [Line Items]	'		'
Anti-dilutive securities excluded from diluted earning per share	'		0.2
Operating Partnership Units [Member]	'		'
Earnings Per Share [Line Items]	'		'
Anti-dilutive securities excluded from diluted earning per share	'		42.6
[1]	We have excluded 0.2 million of restricted stock, and 42.6 million of Operating Partnership units which are securities convertible into common stock in January 2014, from our diluted earnings per share as of September 30, 2013. These amounts were deemed anti-dilutive.

Related_Party_Transactions_Sch

Related Party Transactions - Schedule of Related Party Transactions (Details) (USD $)

Jun. 04, 2013

Jun. 04, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Jan. 23, 2013

Jan. 23, 2013

Dec. 31, 2012

Dec. 31, 2012

Jan. 23, 2013

Jan. 23, 2013

Jan. 23, 2013

Jan. 23, 2013

Jan. 23, 2013

Jan. 23, 2013

Jan. 23, 2013

Jan. 23, 2013

Jan. 23, 2013

Jan. 23, 2013

Jan. 23, 2013

Jan. 23, 2013

Jan. 23, 2013

Jan. 23, 2013

Jan. 23, 2013

Jan. 23, 2013

Jan. 23, 2013

Jan. 23, 2013

Jan. 23, 2013

CyrusOne L.P. [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

Cincinnati Bell Inc. [Member]

Cincinnati Bell Inc. [Member]

Data center colocation agreement provided to CBT and CBTS

Data center colocation agreement provided to CBT and CBTS

Data center colocation agreement provided to CBT and CBTS

Data center colocation agreement provided to CBT and CBTS

229 West 7th Street lease provided to CBT

229 West 7th Street lease provided to CBT

229 West 7th Street lease provided to CBT

229 West 7th Street lease provided to CBT

Goldcoast Drive lease provided to CBT [Member]

Goldcoast Drive lease provided to CBT [Member]

Parkway (Mason) lease provided to CBTS

Parkway (Mason) lease provided to CBTS

Parkway (Mason) lease provided to CBTS

Parkway (Mason) lease provided to CBTS

Transition services provided to CBTS (network interfaces)

Transition services provided to CBTS (network interfaces)

Transition services provided to CBTS (network interfaces)

Transition services provided to CBTS (network interfaces)

Data center leases provided to CBTS

Data center leases provided to CBTS

Data center leases provided to CBTS

Data center leases provided to CBTS

Charges for services provided by CBT (connectivity)

Charges for services provided by CBT (connectivity)

Charges for services provided by CBT (connectivity)

Charges for services provided by CBT (connectivity)

Allocated employee benefit plans by CBI

Allocated employee benefit plans by CBI

Allocated employee benefit plans by CBI

Allocated employee benefit plans by CBI

Allocated centralized insurance costs by CBI

Allocated centralized insurance costs by CBI

Allocated centralized insurance costs by CBI

Allocated centralized insurance costs by CBI

General and administrative services provided by CBI

General and administrative services provided by CBI

General and administrative services provided by CBI

General and administrative services provided by CBI

CyrusOne L.P. [Member]

Cincinnati Bell Inc. [Member]

Cincinnati Bell Inc. [Member]

Data center colocation agreement provided to CBT and CBTS

Data center colocation agreement provided to CBT and CBTS

229 West 7th Street lease provided to CBT

229 West 7th Street lease provided to CBT

Goldcoast Drive lease provided to CBT [Member]

Parkway (Mason) lease provided to CBTS

Parkway (Mason) lease provided to CBTS

Transition services provided to CBTS (network interfaces)

Transition services provided to CBTS (network interfaces)

Data center leases provided to CBTS

Data center leases provided to CBTS

Charges for services provided by CBT (connectivity)

Charges for services provided by CBT (connectivity)

Allocated employee benefit plans by CBI

Allocated employee benefit plans by CBI

Allocated centralized insurance costs by CBI

Allocated centralized insurance costs by CBI

General and administrative services provided by CBI

General and administrative services provided by CBI

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

Revenue:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total revenue

'

'

$2,400,000

$8,800,000

$2,400,000

$8,800,000

'

'

$1,100,000

$3,100,000

$1,100,000

$3,100,000

$100,000

$200,000

$100,000

$200,000

$0

$100,000

$100,000

$200,000

$100,000

$200,000

$700,000

$1,400,000

$700,000

$1,400,000

$400,000

$3,800,000

$400,000

$3,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$400,000

$400,000

'

'

$300,000

$300,000

$0

$0

$0

$0

$0

$100,000

$100,000

$0

$0

'

'

'

'

'

'

'

'

Operating costs and expenses:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total operating costs and expenses

'

'

900,000

1,600,000

900,000

1,600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

900,000

1,600,000

900,000

1,600,000

0

0

0

0

0

0

0

0

0

0

0

0

500,000

500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

100,000

100,000

200,000

200,000

100,000

100,000

100,000

100,000

Accounts receivable from CBI

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Accounts receivable from CBI

'

'

'

'

'

'

0

0.9

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

2.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Accounts payable to CBI

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Accounts payable

'

'

'

'

'

'

0

0.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

2.9

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Dividends payable

'

'

'

'

'

'

0

6.8

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Accounts payable to CBI

'

'

'

'

'

'

$0

$7

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0

$2.90

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash dividend payable to stockholders (in dollars per share)

$0.16

$0.16

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	9 Months Ended		9 Months Ended	3 Months Ended	8 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
	Subsidiary		Minimum [Member]	Maximum [Member]	Maximum [Member]	Maximum [Member]
Income Taxes [Line Items]	'	'	'	'	'	'
Percentage of taxable income	'	'	90.00%	'	'	100.00%
Number of subsidiaries as taxable REIT	2	'	'	'	'	'
Income Tax Expense (Benefit)	'	'	'	$0.30	$1.20	'
Taxes Payable, Current	0.8	'	'	'	'	'
Deferred tax assets, net	$0.60	$0.50	'	'	'	'

Guarantors_Details

Guarantors (Details) (USD $)

1 Months Ended

3 Months Ended

8 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

8 Months Ended

3 Months Ended

8 Months Ended

3 Months Ended

8 Months Ended

3 Months Ended

8 Months Ended

3 Months Ended

8 Months Ended

3 Months Ended

8 Months Ended

3 Months Ended

8 Months Ended

3 Months Ended

8 Months Ended

1 Months Ended

3 Months Ended

8 Months Ended

9 Months Ended

3 Months Ended

8 Months Ended

3 Months Ended

8 Months Ended

3 Months Ended

8 Months Ended

3 Months Ended

8 Months Ended

3 Months Ended

8 Months Ended

3 Months Ended

8 Months Ended

1 Months Ended

3 Months Ended

8 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

8 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

8 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

8 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

8 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

8 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

8 Months Ended

9 Months Ended

0 Months Ended

In Millions, unless otherwise specified

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2013

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2013

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2013

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2013

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2013

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2013

Jan. 23, 2013

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2013

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2013

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2013

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2013

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2013

Jan. 23, 2013

Jan. 23, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Jan. 23, 2013

Sep. 30, 2012

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Jan. 23, 2013

Sep. 30, 2012

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Jan. 23, 2013

Sep. 30, 2012

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Jan. 23, 2013

Sep. 30, 2012

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Jan. 23, 2013

Sep. 30, 2012

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Jan. 23, 2013

Sep. 30, 2012

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Jan. 23, 2013

Sep. 30, 2012

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Jan. 23, 2013

Sep. 30, 2012

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Jan. 23, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2012

Jan. 25, 2013

Jan. 25, 2013

Jan. 25, 2013

Jan. 25, 2013

Nov. 20, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Dec. 31, 2012

Parent Company [Member]

CyrusOne GP [Member]

Non-Guarantor [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

IPO [Member]

IPO [Member]

IPO [Member]

IPO [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

6.375% Senior Notes Due 2022 [Member]

Parent Company [Member]

CyrusOne GP [Member]

Non-Guarantor [Member]

Parent Company [Member]

Parent Company [Member]

Parent Company [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

LP Co-Issuer [Member]

LP Co-Issuer [Member]

LP Co-Issuer [Member]

Finance Co-Issuer [Member]

Finance Co-Issuer [Member]

Finance Co-Issuer [Member]

Guarantors [Member]

Guarantors [Member]

Guarantors [Member]

Non-Guarantor [Member]

Non-Guarantor [Member]

Non-Guarantor [Member]

Eliminations [Member]

Eliminations [Member]

Eliminations [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

Parent Company [Member]

Parent Company [Member]

Parent Company [Member]

Parent Company [Member]

Parent Company [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

General Partner [Member]

LP Co-Issuer [Member]

LP Co-Issuer [Member]

LP Co-Issuer [Member]

LP Co-Issuer [Member]

LP Co-Issuer [Member]

Finance Co-Issuer [Member]

Finance Co-Issuer [Member]

Finance Co-Issuer [Member]

Finance Co-Issuer [Member]

Finance Co-Issuer [Member]

Guarantors [Member]

Guarantors [Member]

Guarantors [Member]

Guarantors [Member]

Guarantors [Member]

Non-Guarantor [Member]

Non-Guarantor [Member]

Non-Guarantor [Member]

Non-Guarantor [Member]

Non-Guarantor [Member]

Eliminations [Member]

Eliminations [Member]

Eliminations [Member]

Eliminations [Member]

Eliminations [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

Parent Company [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

LP Co-Issuer and Finance Co-Issuer [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

Successor [Member]

Successor [Member]

Predecessor [Member]

Predecessor [Member]

LP Co-Issuer [Member]

LP Co-Issuer [Member]

LP Co-Issuer [Member]

Finance Co-Issuer [Member]

Finance Co-Issuer [Member]

Finance Co-Issuer [Member]

Guarantors [Member]

Guarantors [Member]

Guarantors [Member]

Non-Guarantor [Member]

Non-Guarantor [Member]

Non-Guarantor [Member]

Eliminations [Member]

Eliminations [Member]

Eliminations [Member]

LP Co-Issuer [Member]

LP Co-Issuer [Member]

LP Co-Issuer [Member]

LP Co-Issuer [Member]

LP Co-Issuer [Member]

LP Co-Issuer [Member]

LP Co-Issuer [Member]

LP Co-Issuer [Member]

Finance Co-Issuer [Member]

Finance Co-Issuer [Member]

Finance Co-Issuer [Member]

Finance Co-Issuer [Member]

Finance Co-Issuer [Member]

Finance Co-Issuer [Member]

Finance Co-Issuer [Member]

Finance Co-Issuer [Member]

Guarantors [Member]

Guarantors [Member]

Guarantors [Member]

Guarantors [Member]

Guarantors [Member]

Guarantors [Member]

Guarantors [Member]

Guarantors [Member]

Non-Guarantor [Member]

Non-Guarantor [Member]

Non-Guarantor [Member]

Non-Guarantor [Member]

Non-Guarantor [Member]

Non-Guarantor [Member]

Non-Guarantor [Member]

Non-Guarantor [Member]

Eliminations [Member]

Eliminations [Member]

Eliminations [Member]

Eliminations [Member]

Eliminations [Member]

Eliminations [Member]

Eliminations [Member]

Eliminations [Member]

Parent Company [Member]

LP Co-Issuer and Finance Co-Issuer [Member]

CyrusOne L.P. [Member]

CyrusOne L.P. [Member]

Condensed Financial Statements, Captions [Line Items]

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

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'

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'

'

'

Revenue

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$67.50

'

$176.10

$0

$0

'

$0

$0

'

$0

$0

'

$0

$0

'

$66.40

$173.40

'

$1.10

$2.70

'

$0

$0

'

'

$67.50

'

$176.10

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$15.10

$56.70

'

$162.80

'

'

$0

$0

$0

'

'

$0

$0

$0

'

'

$0

$0

$0

'

'

$0

$0

$0

'

'

$14.90

$56.30

$161.80

'

'

$0.20

$0.40

$1

'

'

$0

$0

$0

'

'

$15.10

$56.70

$162.80

'

'

$15.10

$67.50

$56.70

'

$176.10

$162.80

'

'

$0

$0

$0

'

$0

$0

'

'

$0

$0

$0

'

$0

$0

'

'

$14.90

$66.40

$56.30

'

$173.40

$161.80

'

'

$0.20

$1.10

$0.40

'

$2.70

$1

'

'

$0

$0

$0

'

$0

$0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amount received from initial public offering of common stock, net of underwriter's discount

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

337.1

337.1

337.1

337.1

'

'

'

'

'

'

'

'

'

Combined interest held on completion of transactions

'

'

'

'

'

33.90%

1.00%

'

'

33.90%

1.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Ownership percentage of senior notes

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

100.00%

'

'

'

'

Ownership percentage of non-gurantors/subsidiaries

'

'

'

'

'

'

'

100.00%

100.00%

'

'

100.00%

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Condensed Consolidating Balance Sheets

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Land

'

'

'

'

'

'

'

'

'

'

'

'

'

'

81.5

'

81.5

0

0

'

0

0

'

0

0

'

0

0

'

81.5

81.5

'

0

0

'

0

0

'

'

81.5

'

81.5

'

81.5

81.5

'

0

0

'

0

0

'

81.5

81.5

'

0

0

'

0

0

'

'

'

'

'

44.5

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

44.5

'

'

'

'

0

'

'

'

'

0

'

'

'

'

44.5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

44.5

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

44.5

'

'

'

'

'

'

'

'

'

'

'

'

'

Buildings and improvements

'

'

'

'

'

'

'

'

'

'

'

'

'

'

778.2

'

778.2

0

0

'

0

0

'

0

0

'

0

0

'

734.8

734.8

'

43.4

43.4

'

0

0

'

'

778.2

'

778.2

'

778.2

778.2

'

0

0

'

0

0

'

734.8

734.8

'

43.4

43.4

'

0

0

'

'

'

'

'

722.5

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

695.7

'

'

'

'

26.8

'

'

'

'

0

'

'

'

'

722.5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

695.7

'

'

'

'

'

'

'

26.8

'

'

'

'

'

'

'

0

'

722.5

'

'

'

'

'

'

'

'

'

'

'

'

'

Equipment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

134.3

'

134.3

0

0

'

0

0

'

0

0

'

0

0

'

133.6

133.6

'

0.7

0.7

'

0

0

'

'

134.3

'

134.3

'

134.3

134.3

'

0

0

'

0

0

'

133.6

133.6

'

0.7

0.7

'

0

0

'

'

'

'

'

52.4

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

52

'

'

'

'

0.4

'

'

'

'

0

'

'

'

'

52.4

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

52

'

'

'

'

'

'

'

0.4

'

'

'

'

'

'

'

0

'

52.4

'

'

'

'

'

'

'

'

'

'

'

'

'

Construction in progress

'

'

'

'

'

'

'

'

'

'

'

'

'

'

63.2

'

63.2

0

0

'

0

0

'

0

0

'

0

0

'

63.2

63.2

'

0

0

'

0

0

'

'

63.2

'

63.2

'

63.2

63.2

'

0

0

'

0

0

'

63.2

63.2

'

0

0

'

0

0

'

'

'

'

'

64.2

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

51.4

'

'

'

'

12.8

'

'

'

'

0

'

'

'

'

64.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

51.4

'

'

'

'

'

'

'

12.8

'

'

'

'

'

'

'

0

'

64.2

'

'

'

'

'

'

'

'

'

'

'

'

'

Subtotal

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,057.20

'

1,057.20

0

0

'

0

0

'

0

0

'

0

0

'

1,013.10

1,013.10

'

44.1

44.1

'

0

0

'

'

1,057.20

'

1,057.20

'

1,057.20

1,057.20

'

0

0

'

0

0

'

1,013.10

1,013.10

'

44.1

44.1

'

0

0

'

'

'

'

'

883.6

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

843.6

'

'

'

'

40

'

'

'

'

0

'

'

'

'

883.6

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

843.6

'

'

'

'

'

'

'

40

'

'

'

'

'

'

'

0

'

883.6

'

'

'

'

'

'

'

'

'

'

'

'

'

Accumulated depreciation

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-218.6

'

-218.6

0

0

'

0

0

'

0

0

'

0

0

'

-214.6

-214.6

'

-4

-4

'

0

0

'

'

-218.6

'

-218.6

'

-218.6

-218.6

'

0

0

'

0

0

'

-214.6

-214.6

'

-4

-4

'

0

0

'

'

'

'

'

-176.7

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

-174.8

'

'

'

'

-1.9

'

'

'

'

0

'

'

'

'

-176.7

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

-174.8

'

'

'

'

'

'

'

-1.9

'

'

'

'

'

'

'

0

'

-176.7

'

'

'

'

'

'

'

'

'

'

'

'

'

Net investment in real estate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

838.6

'

838.6

0

0

'

0

0

'

0

0

'

0

0

'

798.5

798.5

'

40.1

40.1

'

0

0

'

'

838.6

'

838.6

'

838.6

838.6

'

0

0

'

0

0

'

798.5

798.5

'

40.1

40.1

'

0

0

'

'

'

'

'

706.9

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

668.8

'

'

'

'

38.1

'

'

'

'

0

'

'

'

'

706.9

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

668.8

'

'

'

'

'

'

'

38.1

'

'

'

'

'

'

'

0

'

706.9

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash and cash equivalents

'

'

'

'

'

'

'

'

'

'

'

'

'

12.3

213.2

'

213.2

0

0

0

0

0

0

0

0

0.1

0

0

0

211.8

211.8

11.2

1.4

1.4

1

0

0

0

12.3

213.2

'

213.2

'

213.2

213.2

12.3

0

0

0.1

0

0

0

211.8

211.8

11.2

1.4

1.4

1

0

0

0

12.3

3.2

'

3.2

16.5

0.6

0

0

0

0

0

0

0

0

0

0

0.1

0

0

0

0

0

0

0

0

0

11.2

1.3

1.3

15.6

0.4

1

1.9

1.9

0.9

0.2

0

0

0

0

0

12.3

3.2

3.2

16.5

0.6

12.3

'

3.2

'

'

3.2

16.5

0.6

0.1

'

0

'

'

0

0

0

0

'

0

'

'

0

0

0

11.2

'

1.3

'

'

1.3

15.6

0.4

1

'

1.9

'

'

1.9

0.9

0.2

0

'

0

'

'

0

0

0

16.5

'

'

'

'

'

'

'

'

'

'

'

'

'

Investment in subsidiary

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

0

790.4

790.4

'

7.9

7.9

'

814.7

814.7

'

0

0

'

0.3

0.3

'

0

0

'

-1,613.30

-1,613.30

'

'

'

'

'

'

0

0

'

814.7

814.7

'

0

0

'

0.3

0.3

'

0

0

'

-815

-815

'

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

497.2

'

'

'

'

0

'

'

'

'

0.4

'

'

'

'

0

'

'

'

'

-497.6

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

497.2

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0.4

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

-497.6

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

Rent and other receivables

'

'

'

'

'

'

'

'

'

'

'

'

'

'

33.9

'

33.9

0

0

'

0

0

'

0

0

'

0

0

'

33.3

33.3

'

0.6

0.6

'

0

0

'

'

33.9

'

33.9

'

33.9

33.9

'

0

0

'

0

0

'

33.3

33.3

'

0.6

0.6

'

0

0

'

'

'

'

'

33.2

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

32.6

'

'

'

'

0.6

'

'

'

'

0

'

'

'

'

33.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

32.6

'

'

'

'

'

'

'

0.6

'

'

'

'

'

'

'

0

'

33.2

'

'

'

'

'

'

'

'

'

'

'

'

'

Restricted cash

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

6.3

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

6.3

'

'

'

'

0

'

'

'

'

0

'

'

'

'

6.3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

6.3

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

6.3

'

'

'

'

'

'

'

'

'

'

'

'

'

Goodwill

'

'

'

'

'

'

'

'

'

'

'

'

'

'

276.2

'

276.2

0

0

'

0

0

'

0

0

'

0

0

'

276.2

276.2

'

0

0

'

0

0

'

'

276.2

'

276.2

'

276.2

276.2

'

0

0

'

0

0

'

276.2

276.2

'

0

0

'

0

0

'

'

'

'

'

276.2

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

276.2

'

'

'

'

0

'

'

'

'

0

'

'

'

'

276.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

276.2

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

276.2

'

'

'

'

'

'

'

'

'

'

'

'

'

Intangible assets, net

'

'

'

'

'

'

'

'

'

'

'

'

'

'

89.9

'

89.9

0

0

'

0

0

'

0

0

'

0

0

'

89.9

89.9

'

0

0

'

0

0

'

'

89.9

'

89.9

'

89.9

89.9

'

0

0

'

0

0

'

89.9

89.9

'

0

0

'

0

0

'

'

'

'

'

102.6

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

102.6

'

'

'

'

0

'

'

'

'

0

'

'

'

'

102.6

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

102.6

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

102.6

'

'

'

'

'

'

'

'

'

'

'

'

'

Intercompany receivable

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

0

0

0

'

0

0

'

508.1

508.1

'

508.2

508.2

'

0.2

0.2

'

0

0

'

-1,016.50

-1,016.50

'

'

'

'

'

'

0

0

'

508.1

508.1

'

508.2

508.2

'

0.2

0.2

'

0

0

'

-1,016.50

-1,016.50

'

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

508.2

'

'

'

'

508.2

'

'

'

'

0

'

'

'

'

0

'

'

'

'

-1,016.40

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

508.2

'

'

'

'

'

'

'

508.2

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

-1,016.40

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

Due from affiliates

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.9

'

0.9

0

0

'

0

0

'

0

0

'

0

0

'

0.9

0.9

'

0

0

'

0

0

'

'

0.9

'

0.9

'

0.9

0.9

'

0

0

'

0

0

'

0.9

0.9

'

0

0

'

0

0

'

'

'

'

'

2.2

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

2.2

'

'

'

'

0

'

'

'

'

0

'

'

'

'

2.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

2.2

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

2.2

'

'

'

'

'

'

'

'

'

'

'

'

'

Other assets

'

'

'

'

'

'

'

'

'

'

'

'

'

'

67.2

'

67.2

0

0

'

0

0

'

15.5

15.5

'

15.5

15.5

'

49.8

49.8

'

1.9

1.9

'

-15.5

-15.5

'

'

67.2

'

67.2

'

67.2

67.2

'

15.5

15.5

'

15.5

15.5

'

49.8

49.8

'

1.9

1.9

'

-15.5

-15.5

'

'

'

'

'

67

'

'

'

'

7.9

'

'

'

'

0

'

'

'

'

17

'

'

'

'

17

'

'

'

'

41.6

'

'

'

'

0.5

'

'

'

'

-17

'

'

'

'

59.1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

17

'

'

'

'

'

'

'

17

'

'

'

'

'

'

'

41.6

'

'

'

'

'

'

'

0.5

'

'

'

'

'

'

'

-17

'

59.1

'

'

'

'

'

'

'

'

'

'

'

'

'

Total assets

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,519.90

'

1,519.90

790.4

790.4

'

7.9

7.9

'

1,338.30

1,338.30

'

523.7

523.7

'

1,460.90

1,460.90

'

44

44

'

-2,645.30

-2,645.30

'

'

1,519.90

'

1,519.90

'

1,519.90

1,519.90

'

1,338.30

1,338.30

'

523.7

523.7

'

1,460.90

1,460.90

'

44

44

'

-1,847

-1,847

'

'

'

'

'

1,210.90

'

'

'

'

7.9

'

'

'

'

0

'

'

'

'

1,022.40

'

'

'

'

525.2

'

'

'

'

1,146.30

'

'

'

'

40.1

'

'

'

'

-1,531

'

'

'

'

1,203

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,022.40

'

'

'

'

'

'

'

525.2

'

'

'

'

'

'

'

1,146.30

'

'

'

'

'

'

'

40.1

'

'

'

'

'

'

'

-1,531

'

1,203

'

'

'

'

'

'

'

'

'

'

'

'

'

Accounts payable and accrued expenses

'

'

'

'

'

'

'

'

'

'

'

'

'

'

67.8

'

67.8

0

0

'

0

0

'

16.1

16.1

'

12.6

12.6

'

51.3

51.3

'

0.4

0.4

'

-12.6

-12.6

'

'

67.8

'

67.8

'

67.8

67.8

'

16.1

16.1

'

12.6

12.6

'

51.3

51.3

'

0.4

0.4

'

-12.6

-12.6

'

'

'

'

'

37.1

'

'

'

'

0.8

'

'

'

'

0

'

'

'

'

4.4

'

'

'

'

4.4

'

'

'

'

31.7

'

'

'

'

0.2

'

'

'

'

-4.4

'

'

'

'

36.3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4.4

'

'

'

'

'

'

'

4.4

'

'

'

'

'

'

'

31.7

'

'

'

'

'

'

'

0.2

'

'

'

'

'

'

'

-4.4

'

36.3

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred revenue

'

'

'

'

'

'

'

'

'

'

'

'

'

'

55.1

'

55.1

0

0

'

0

0

'

0

0

'

0

0

'

54.4

54.4

'

0.7

0.7

'

0

0

'

'

55.1

'

55.1

'

55.1

55.1

'

0

0

'

0

0

'

54.4

54.4

'

0.7

0.7

'

0

0

'

'

'

'

'

52.8

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

52.3

'

'

'

'

0.5

'

'

'

'

0

'

'

'

'

52.8

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

52.3

'

'

'

'

'

'

'

0.5

'

'

'

'

'

'

'

0

'

52.8

'

'

'

'

'

'

'

'

'

'

'

'

'

Intercompany and loan payable

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

0

0

0

'

0

0

'

0

0

'

0

0

'

508.1

508.1

'

0.2

0.2

'

-508.3

-508.3

'

'

'

'

'

'

0

0

'

0

0

'

0

0

'

508.1

508.1

'

0.2

0.2

'

-508.3

-508.3

'

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

508

'

'

'

'

0.2

'

'

'

'

-508.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

508

'

'

'

'

'

'

'

0.2

'

'

'

'

'

'

'

-508.2

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

Due to affiliates

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7

'

7

0

0

'

0

0

'

6.8

6.8

'

0

0

'

0.2

0.2

'

0

0

'

0

0

'

'

7

'

7

'

7

7

'

6.8

6.8

'

0

0

'

0.2

0.2

'

0

0

'

0

0

'

'

'

'

'

2.9

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

2.9

'

'

'

'

0

'

'

'

'

0

'

'

'

'

2.9

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

2.9

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

2.9

'

'

'

'

'

'

'

'

'

'

'

'

'

Capital lease obligations

'

'

'

'

'

'

'

'

'

'

'

'

'

'

18.8

'

18.8

0

0

'

0

0

'

0

0

'

0

0

'

10.4

10.4

'

8.4

8.4

'

0

0

'

'

18.8

'

18.8

'

18.8

18.8

'

0

0

'

0

0

'

10.4

10.4

'

8.4

8.4

'

0

0

'

'

'

'

'

32.2

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

23.2

'

'

'

'

9

'

'

'

'

0

'

'

'

'

32.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

23.2

'

'

'

'

'

'

'

9

'

'

'

'

'

'

'

0

'

32.2

'

'

'

'

'

'

'

'

'

'

'

'

'

6 3/8% Senior Notes due 2022

'

'

'

'

'

'

'

'

'

'

'

'

'

'

525

'

525

0

0

'

0

0

'

525

525

'

525

525

'

0

0

'

0

0

'

-525

-525

'

'

525

'

525

'

525

525

'

525

525

'

525

525

'

0

0

'

0

0

'

-525

-525

'

'

'

'

'

525

'

'

'

'

0

'

'

'

'

0

'

'

'

'

525

'

'

'

'

525

'

'

'

'

0

'

'

'

'

0

'

'

'

'

-525

'

'

'

'

525

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

525

'

'

'

'

'

'

'

525

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

-525

'

525

'

'

'

'

525

525

'

525

'

525

525

525

525

Other financing arrangements

'

'

'

'

'

'

'

'

'

'

'

'

'

'

55.8

'

55.8

0

0

'

0

0

'

0

0

'

0

0

'

21.8

21.8

'

34

34

'

0

0

'

'

55.8

'

55.8

'

55.8

55.8

'

0

0

'

0

0

'

21.8

21.8

'

34

34

'

0

0

'

'

'

'

'

60.8

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

31

'

'

'

'

29.8

'

'

'

'

0

'

'

'

'

60.8

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

31

'

'

'

'

'

'

'

29.8

'

'

'

'

'

'

'

0

'

60.8

'

'

'

'

'

'

'

'

'

'

'

'

'

Total liabilities

'

'

'

'

'

'

'

'

'

'

'

'

'

'

729.5

'

729.5

0

0

'

0

0

'

547.9

547.9

'

537.6

537.6

'

646.2

646.2

'

43.7

43.7

'

-1,045.90

-1,045.90

'

'

729.5

'

729.5

'

729.5

729.5

'

547.9

547.9

'

537.6

537.6

'

646.2

646.2

'

43.7

43.7

'

-1,045.90

-1,045.90

'

'

'

'

'

710.8

'

'

'

'

0.8

'

'

'

'

0

'

'

'

'

529.4

'

'

'

'

529.4

'

'

'

'

649.1

'

'

'

'

39.7

'

'

'

'

-1,037.60

'

'

'

'

710

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

529.4

'

'

'

'

'

'

'

529.4

'

'

'

'

'

'

'

649.1

'

'

'

'

'

'

'

39.7

'

'

'

'

'

'

'

-1,037.60

'

710

'

'

'

'

'

'

'

'

'

'

'

'

'

Total shareholders’ equity/Parent’s net investments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

325.4

'

325.4

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

500.1

'

'

'

'

7.1

'

'

'

'

0

'

'

'

'

493

'

'

'

'

-4.2

'

'

'

'

497.2

'

'

'

'

0.4

'

'

'

'

-493.4

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

493

'

'

'

'

'

'

'

-4.2

'

'

'

'

'

'

'

497.2

'

'

'

'

'

'

'

0.4

'

'

'

'

'

'

'

-493.4

'

493

'

'

'

'

'

'

'

'

'

'

'

'

'

Total equity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

790.4

'

790.4

790.4

790.4

'

7.9

7.9

'

790.4

790.4

'

-13.9

-13.9

'

814.7

814.7

'

0.3

0.3

'

-1,599.40

-1,599.40

'

'

790.4

'

790.4

'

790.4

790.4

'

790.4

790.4

'

-13.9

-13.9

'

814.7

814.7

'

0.3

0.3

'

-801.1

-801.1

'

'

'

'

'

500.1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

493

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total liabilities and parent’s net investment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,210.90

'

'

'

'

7.9

'

'

'

'

0

'

'

'

'

1,022.40

'

'

'

'

525.2

'

'

'

'

1,146.30

'

'

'

'

40.1

'

'

'

'

-1,531

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,022.40

'

'

'

'

'

'

'

525.2

'

'

'

'

'

'

'

1,146.30

'

'

'

'

'

'

'

40.1

'

'

'

'

'

'

'

-1,531

'

1,203

'

'

'

'

'

'

'

'

'

'

'

'

'

Total liabilities and equity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,519.90

'

1,519.90

790.4

790.4

'

7.9

7.9

'

1,338.30

1,338.30

'

523.7

523.7

'

1,460.90

1,460.90

'

44

44

'

-2,645.30

-2,645.30

'

'

1,519.90

'

1,519.90

'

1,519.90

1,519.90

'

1,338.30

1,338.30

'

523.7

523.7

'

1,460.90

1,460.90

'

44

44

'

-1,847

-1,847

'

'

'

'

'

1,210.90

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,203

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Costs and expenses:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Property operating expenses

'

'

'

'

'

'

'

'

'

'

'

'

'

'

24.2

'

64.1

0

0

'

0

0

'

0

0

'

0

0

'

23.7

62.5

'

0.5

1.6

'

0

0

'

'

24.2

'

64.1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4.8

20

'

55.3

'

'

0

0

0

'

'

0

0

0

'

'

0

0

0

'

'

0

0

0

'

'

4.8

19.5

54

'

'

0

0.5

1.3

'

'

0

0

0

'

'

4.8

20

55.3

'

'

4.8

24.2

20

'

64.1

55.3

'

'

0

0

0

'

0

0

'

'

0

0

0

'

0

0

'

'

4.8

23.7

19.5

'

62.5

54

'

'

0

0.5

0.5

'

1.6

1.3

'

'

0

0

0

'

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Sales and marketing

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.3

'

7.3

0

0

'

0

0

'

0

0

'

0

0

'

2.2

7.1

'

0.1

0.2

'

0

0

'

'

2.3

'

7.3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.7

2.1

'

5.8

'

'

0

0

0

'

'

0

0

0

'

'

0

0

0

'

'

0

0

0

'

'

0.7

2

5.6

'

'

0

0.1

0.2

'

'

0

0

0

'

'

0.7

2.1

5.8

'

'

0.7

2.3

2.1

'

7.3

5.8

'

'

0

0

0

'

0

0

'

'

0

0

0

'

0

0

'

'

0.7

2.2

2

'

7.1

5.6

'

'

0

0.1

0.1

'

0.2

0.2

'

'

0

0

0

'

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

General and administrative

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7.2

'

19.7

0

0

'

0

0

'

0

0

'

0

0

'

7.1

19.6

'

0.1

0.1

'

0

0

'

'

7.2

'

19.7

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.5

5.3

'

15.4

'

'

0

0

0

'

'

0

0

0

'

'

0

0

0

'

'

0

0

0

'

'

1.4

5.2

15.3

'

'

0.1

0.1

0.1

'

'

0

0

0

'

'

1.5

5.3

15.4

'

'

1.5

7.2

5.3

'

19.7

15.4

'

'

0

0

0

'

0

0

'

'

0

0

0

'

0

0

'

'

1.4

7.1

5.2

'

19.6

15.3

'

'

0.1

0.1

0.1

'

0.1

0.1

'

'

0

0

0

'

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Depreciation and amortization

'

'

'

'

'

'

'

'

'

'

'

'

'

'

23.9

'

63.3

0

0

'

0

0

'

0

0

'

0

0

'

23.2

61.3

'

0.7

2

'

0

0

'

'

23.9

'

63.3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5.3

18.8

'

52.9

'

'

0

0

0

'

'

0

0

0

'

'

0

0

0

'

'

0

0

0

'

'

5.2

18.2

51.7

'

'

0.1

0.6

1.2

'

'

0

0

0

'

'

5.3

18.8

52.9

'

'

5.3

23.9

18.8

'

63.3

52.9

'

'

0

0

0

'

0

0

'

'

0

0

0

'

0

0

'

'

5.2

23.2

18.2

'

61.3

51.7

'

'

0.1

0.7

0.6

'

2

1.2

'

'

0

0

0

'

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Management fees charged by CBI

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0.9

'

2.1

'

'

'

0

0

'

'

'

0

0

'

'

'

0

0

'

'

'

0

0

'

'

'

0.9

2.1

'

'

'

0

0

'

'

'

0

0

'

'

0

0.9

2.1

'

'

'

'

0.9

'

'

2.1

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

0

'

'

'

'

0.9

'

'

2.1

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loss on sale of receivables to an affiliate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

1.3

'

3.7

'

'

'

0

0

'

'

'

0

0

'

'

'

0

0

'

'

'

0

0

'

'

'

1.3

3.7

'

'

'

0

0

'

'

'

0

0

'

'

0

1.3

3.7

'

'

'

'

1.3

'

'

3.7

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

0

'

'

'

'

1.3

'

'

3.7

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Asset impairments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

'

13.3

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

13.3

'

'

'

'

0

'

'

'

'

0

'

'

0

0

13.3

'

'

'

'

'

'

'

13.3

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

13.3

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loss on extinguishment of debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

1.3

'

0

'

'

0

'

'

0

'

'

0

'

'

1.3

'

'

0

'

'

0

'

'

0

'

1.3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

0

'

'

'

'

'

'

-1.3

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

-1.3

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Transaction-related compensation

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

20

0

'

0

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

20

'

'

'

'

0

'

'

'

'

0

'

'

'

'

20

0

0

'

'

20

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

20

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restructuring Charges

'

'

'

0.7

'

'

'

'

'

'

'

'

'

'

0.7

'

0.7

0

0

'

0

0

'

0

0

'

0

0

'

0.7

0.7

'

0

0

'

0

0

'

'

0.7

'

0.7

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

0

'

'

'

0.7

'

'

1.1

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

0

'

'

'

'

0.7

'

'

1.1

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Transaction Costs

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.7

'

1.1

0

0

'

0

0

'

0

0

'

0

0

'

0.7

1.1

'

0

0

'

0

0

'

'

0.7

'

1.1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.1

0.6

'

1.3

'

'

0

0

0

'

'

0

0

0

'

'

0

0

0

'

'

0

0

0

'

'

0.1

0.6

1.3

'

'

0

0

0

'

'

0

0

0

'

'

0.1

0.6

1.3

'

'

0.1

0.7

0.6

'

0.7

1.3

'

'

0

0

0

'

0

0

'

'

0

0

0

'

0

0

'

'

0.1

0.7

0.6

'

0.7

1.3

'

'

0

0

0

'

0

0

'

'

0

0

0

'

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total costs and expenses

'

'

'

'

'

'

'

'

'

'

'

'

'

'

59

'

156.2

0

0

'

0

0

'

0

0

'

0

0

'

57.6

152.3

'

1.4

3.9

'

0

0

'

'

59

'

156.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

32.4

49

'

149.8

'

'

0

0

0

'

'

0

0

0

'

'

0

0

0

'

'

0

0

0

'

'

32.2

47.7

147

'

'

0.2

1.3

2.8

'

'

0

0

0

'

'

32.4

49

149.8

'

'

32.4

59

49

'

156.2

149.8

'

'

0

0

0

'

0

0

'

'

0

0

0

'

0

0

'

'

32.2

57.6

47.7

'

152.3

147

'

'

0.2

1.4

1.3

'

3.9

2.8

'

'

0

0

0

'

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Operating income (loss)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

8.5

'

19.9

0

0

'

0

0

'

0

0

'

0

0

'

8.8

21.1

'

-0.3

-1.2

'

0

0

'

'

8.5

'

19.9

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-17.3

7.7

'

13

'

'

0

0

0

'

'

0

0

0

'

'

0

0

0

'

'

0

0

0

'

'

-17.3

8.6

14.8

'

'

0

-0.9

-1.8

'

'

0

0

0

'

'

-17.3

7.7

13

'

'

-17.3

8.5

7.7

'

19.9

13

'

'

0

0

0

'

0

0

'

'

0

0

0

'

0

0

'

'

-17.3

8.8

8.6

'

21.1

14.8

'

'

0

-0.3

-0.9

'

-1.2

-1.8

'

'

0

0

0

'

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest expense

'

'

'

'

'

'

'

'

'

'

'

'

'

'

10.5

'

29.7

0

0

'

0

0

'

9.2

26.5

'

9.2

26.5

'

0.4

1.3

'

0.9

1.9

'

-9.2

-26.5

'

'

10.5

'

29.7

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.5

11.3

'

31.2

'

'

0

0

0

'

'

0

0

0

'

'

2.3

0

0

'

'

2.3

0

0

'

'

0.1

10.2

28.9

'

'

0.1

1.1

2.3

'

'

-2.3

0

0

'

'

2.5

11.3

31.2

'

'

2.5

10.5

11.3

'

29.7

31.2

'

'

2.3

9.2

0

'

26.5

0

'

'

2.3

9.2

0

'

26.5

0

'

'

0.1

0.4

10.2

'

1.3

28.9

'

'

0.1

0.9

1.1

'

1.9

2.3

'

'

-2.3

-9.2

0

'

-26.5

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Other Nonoperating Income

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-0.1

'

-0.1

0

0

'

0

0

'

0

0

'

0

0

'

-0.1

-0.1

'

0

0

'

0

0

'

'

0.1

'

0.1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

0

'

'

'

-0.1

'

'

0.1

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

0

'

'

'

'

-0.1

'

'

0.1

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Income (loss) before income taxes

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-1.9

'

-11

0

0

'

0

0

'

-9.2

-26.5

'

-9.2

-26.5

'

8.5

18.6

'

-1.2

-3.1

'

9.2

26.5

'

'

-1.9

'

-11

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-19.8

-3.6

'

-18.2

'

'

0

0

0

'

'

0

0

0

'

'

-2.3

0

0

'

'

-2.3

0

0

'

'

-17.4

-1.6

-14.1

'

'

-0.1

-2

-4.1

'

'

2.3

0

0

'

'

-19.8

-3.6

-18.2

'

'

-19.8

-1.9

-3.6

-11

'

-18.2

'

'

-2.3

-9.2

0

-26.5

'

0

'

'

-2.3

-9.2

0

-26.5

'

0

'

'

-17.4

8.5

-1.6

18.6

'

-14.1

'

'

-0.1

-1.2

-2

-3.1

'

-4.1

'

'

2.3

9.2

0

26.5

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Income tax (expense) benefit

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-0.3

'

-0.8

0

0

'

0

0

'

0

0

'

0

0

'

-0.3

-0.8

'

0

0

'

0

0

'

'

-0.3

'

-0.8

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-0.4

0.7

'

4.7

'

'

0

0

0

'

'

0

0

0

'

'

0

0

0

'

'

0

0

0

'

'

-0.4

0.7

4.7

'

'

0

0

0

'

'

0

0

0

'

'

-0.4

0.7

4.7

'

'

-0.4

-0.3

0.7

-0.8

'

4.7

'

'

0

0

0

0

'

0

'

'

0

0

0

0

'

0

'

'

-0.4

-0.3

0.7

-0.8

'

4.7

'

'

0

0

0

0

'

0

'

'

0

0

0

0

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Income (loss) from continuing operations

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-2.2

'

-11.8

-2.2

-11.8

'

0

-0.1

'

-2.2

-11.8

'

-9.2

-26.5

'

7

14.7

'

-1.2

-3.1

'

5.6

26.8

'

-20.2

'

-2.9

'

-13.5

-2.2

'

'

-2.2

'

'

-9.2

'

'

7

'

'

-1.2

'

'

3.4

'

'

-20.2

-2.9

'

-13.5

'

'

0

0

0

'

'

0

0

0

'

'

-20.2

0

0

'

'

-2.3

0

0

'

'

-17.9

-2.9

-13.5

'

'

-0.1

-2

-4.1

'

'

20.3

2

4.1

'

'

'

'

'

'

'

-20.2

'

-2.9

-11.8

'

-13.5

'

'

-20.2

'

0

-11.8

'

0

'

'

-2.3

'

0

-26.5

'

0

'

'

-17.9

'

-2.9

14.7

'

-13.5

'

'

-0.1

'

-2

-3.1

'

-4.1

'

'

20.3

'

2

14.9

'

4.1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gains (Losses) on Sales of Other Real Estate

0

0

0.1

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

0.1

0

0.1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.1

'

0.1

'

'

'

0

0

'

'

'

0

0

'

'

'

0

0

'

'

'

0

0

'

'

'

0.1

0.1

'

'

'

0

0

'

'

'

0

0

'

'

'

'

'

'

'

'

'

0.1

'

'

0.1

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

0

'

'

'

'

0.1

'

'

0.1

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity earnings (loss) related to investment in subsidiaries

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

0

-2.2

-11.8

'

0

-0.1

'

7

14.7

'

0

0

'

-1.2

-3.1

'

0

0

'

-3.6

0.3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

'

0

'

'

0

0

0

'

'

0

0

0

'

'

-17.9

0

0

'

'

0

0

0

'

'

-0.1

-2

-4.1

'

'

0

0

0

'

'

18

2

4.1

'

'

'

'

'

'

'

0

0

0

0

'

0

'

'

-17.9

7

0

14.7

'

0

'

'

0

0

0

0

'

0

'

'

-0.1

-1.2

-2

-3.1

'

-4.1

'

'

0

0

0

0

'

0

'

'

18

-5.8

2

-11.6

'

4.1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Noncontrolling interest in net loss

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.4

'

7.8

1.4

7.8

'

0

0

'

0

0

'

0

0

'

0

0

'

0

0

'

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net income (loss) attributed to common shareholders

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-2.2

-13.4

-11.8

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-2.2

'

-11.8

'

-2.2

'

'

-2.2

'

'

-9.2

'

'

7

'

'

-1.2

'

'

3.4

'

'

-20.2

-2.8

'

-13.4

'

'

0

0

0

'

'

0

0

0

'

'

-20.2

0

0

'

'

-2.3

0

0

'

'

-17.9

-2.8

-13.4

'

'

-0.1

-2

-4.1

'

'

20.3

2

4.1

'

'

-20.2

-2.8

-13.4

'

'

-20.2

'

-2.8

'

'

-13.4

'

'

-20.2

'

0

'

'

0

'

'

-2.3

'

0

'

'

0

'

'

-17.9

'

-2.8

'

'

-13.4

'

'

-0.1

'

-2

'

'

-4.1

'

'

20.3

'

2

'

'

4.1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net loss attributed to common shareholders

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-0.8

'

-4

-0.8

-4

'

0

-0.1

'

-2.2

-11.8

'

-9.2

-26.5

'

7

14.7

'

-1.2

-3.1

'

5.6

26.8

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-11.8

'

'

'

'

'

'

'

-11.8

'

'

'

'

'

'

'

-26.5

'

'

'

'

'

'

'

14.7

'

'

'

'

'

'

'

-3.1

'

'

'

'

'

'

'

14.9

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Condensed Consolidating Statements of Cash Flows

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net cash provided by (used in) operating activities

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

62.8

'

0

'

'

0

'

'

-17.3

'

'

-17.2

'

'

82.3

'

'

-2.2

'

'

17.2

'

'

'

'

62.8

'

'

62.8

'

'

-17.3

'

'

-17.2

'

'

82.3

'

'

-2.2

'

'

17.2

'

2

'

'

42.8

'

'

0

'

0

'

'

0

'

0

'

'

0

'

0

'

'

0

'

0

'

'

1.9

'

40.3

'

'

0.1

'

2.5

'

'

0

'

0

'

'

2

'

42.8

'

'

2

'

'

'

'

42.8

'

'

0

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

1.9

'

'

'

'

40.3

'

'

0.1

'

'

'

'

2.5

'

'

0

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash flows from investing activities:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Capital expenditures – acquisitions of real estate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-33.3

'

0

'

'

0

'

'

0

'

'

0

'

'

-33.3

'

'

0

'

'

0

'

'

'

'

-33.3

'

'

-33.3

'

'

0

'

'

0

'

'

-33.3

'

'

0

'

'

0

'

0

'

'

-25.4

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

-25.4

'

'

'

'

0

'

'

'

'

0

'

'

0

'

-25.4

'

'

'

'

'

'

'

-25.4

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

-25.4

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Capital expenditures – other development

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-124.6

'

0

'

'

0

'

'

0

'

'

0

'

'

-124.5

'

'

-0.1

'

'

0

'

'

'

'

-124.6

'

'

-124.6

'

'

0

'

'

0

'

'

-124.5

'

'

-0.1

'

'

0

'

-7.7

'

'

-121

'

'

0

'

0

'

'

0

'

0

'

'

0

'

0

'

'

0

'

0

'

'

-7.7

'

-120.2

'

'

0

'

-0.8

'

'

0

'

0

'

'

-7.7

'

-121

'

'

-7.7

'

'

'

'

-121

'

'

0

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

-7.7

'

'

'

'

-120.2

'

'

0

'

'

'

'

-0.8

'

'

0

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Increase (Decrease) in Restricted Cash

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

4.4

'

'

0

'

'

0

'

'

4.4

'

'

0

'

'

0

'

1.9

'

'

-11.1

'

'

0

'

0

'

'

0

'

0

'

'

0

'

0

'

'

0

'

0

'

'

1.9

'

-11.1

'

'

0

'

0

'

'

0

'

0

'

'

0

'

-11.1

'

'

1.9

'

'

'

'

-11.1

'

'

0

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

1.9

'

'

'

'

-11.1

'

'

0

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Investment in subsidiaries

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

-337.1

'

'

0

'

'

-337.1

'

'

0

'

'

0

'

'

0

'

'

674.2

'

'

'

'

'

'

'

0

'

'

-337.1

'

'

0

'

'

0

'

'

0

'

'

337.1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Intercompany advances, net

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

0

'

'

0.2

'

'

0

'

0

'

'

0

'

0

'

'

0.1

'

0

'

'

0

'

0

'

'

-0.1

'

0.2

'

'

0

'

0

'

'

0

'

0

'

'

'

'

'

'

'

0

'

'

'

'

0.2

'

'

0.1

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

-0.1

'

'

'

'

0.2

'

'

0

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Return of investment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

20.7

'

'

0

'

'

39.2

'

'

18.5

'

'

0

'

'

0

'

'

-78.4

'

'

'

'

'

'

'

0

'

'

39.2

'

'

18.5

'

'

0

'

'

0

'

'

-57.7

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds From Release Of Restricted Cash

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4.4

'

0

'

'

0

'

'

0

'

'

0

'

'

4.4

'

'

0

'

'

0

'

'

'

'

4.4

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.9

'

4.4

0.7

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0.7

'

'

'

'

0

'

'

'

'

0

'

'

1.9

'

0.7

'

'

'

'

'

'

'

0.7

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0.7

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Advances to affiliates

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

-9.6

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

-9.6

'

'

'

'

0

'

'

'

'

0

'

'

0

'

-9.6

'

'

'

'

'

'

'

-9.6

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

-9.6

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net cash provided by (used in) investing activities

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-153.5

'

-316.4

'

'

0

'

'

-297.9

'

'

18.5

'

'

-153.4

'

'

-0.1

'

'

595.8

'

'

'

'

-153.5

'

'

-153.5

'

'

-297.9

'

'

18.5

'

'

-153.4

'

'

-0.1

'

'

279.4

'

-5.8

'

'

-166.2

'

'

0

'

0

'

'

0

'

0

'

'

0.1

'

0

'

'

0

'

0

'

'

-5.9

'

-165.4

'

'

0

'

-0.8

'

'

0

'

0

'

'

-5.8

'

-166.2

'

'

-5.8

'

'

'

'

-166.2

'

'

0.1

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

-5.9

'

'

'

'

-165.4

'

'

0

'

'

'

'

-0.8

'

'

0

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash flows from financing activities:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Issuance of common stock/partnership units

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

360.5

'

360.5

'

'

0

'

'

337.1

'

'

0

'

'

0

'

'

0

'

'

-337.1

'

'

'

'

337.1

'

'

337.1

'

'

337.1

'

'

0

'

'

0

'

'

0

'

'

0

'

0

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

IPO costs

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-23.4

'

-23.4

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Dividends paid

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-20.7

'

-20.7

'

'

0

'

'

-20.7

'

'

0

'

'

-20.7

'

'

0

'

'

41.4

'

'

'

'

-20.7

'

'

-20.7

'

'

-20.7

'

'

0

'

'

-20.7

'

'

0

'

'

20.7

'

0

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Payments on capital leases and other financing arrangements

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-3.7

'

0

'

'

0

'

'

0

'

'

0

'

'

-3.2

'

'

-0.5

'

'

0

'

'

'

'

-3.7

'

'

-3.7

'

'

0

'

'

0

'

'

-3.2

'

'

-0.5

'

'

0

'

-0.6

'

'

-5.2

'

'

0

'

0

'

'

0

'

0

'

'

0

'

0

'

'

0

'

0

'

'

-0.6

'

-5.2

'

'

0

'

0

'

'

0

'

0

'

'

-0.6

'

-5.2

'

'

-0.6

'

'

'

'

-5.2

'

'

0

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

-0.6

'

'

'

'

-5.2

'

'

0

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Payments to buyout capital leases

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-9.6

'

0

'

'

0

'

'

0

'

'

0

'

'

-9.6

'

'

0

'

'

0

'

'

'

'

-9.6

'

'

-9.6

'

'

0

'

'

0

'

'

-9.6

'

'

0

'

'

0

'

0

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Borrowings from affiliates, net

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

131.9

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

0

'

'

'

'

131.9

'

'

'

'

0

'

'

'

'

0

'

'

0

'

131.9

'

'

'

'

'

'

'

131.9

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

131.9

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Payment to buyout other financing arrangement

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-10.2

'

0

'

'

0

'

'

0

'

'

0

'

'

-10.2

'

'

0

'

'

0

'

'

'

'

-10.2

'

'

-10.2

'

'

0

'

'

0

'

'

-10.2

'

'

0

'

'

0

'

0

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Contributions (distributions) from (to) parent, net

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

0

'

'

0

'

'

0

'

'

0

'

'

315.4

'

'

3.2

'

'

-318.6

'

'

'

'

0

'

'

0

'

'

0

'

'

0

'

'

315.4

'

'

3.2

'

'

-318.6

'

0.2

'

'

-0.7

'

'

0

'

0

'

'

0

'

0

'

'

0

'

0

'

'

0

'

0

'

'

0.2

'

-0.7

'

'

0

'

0

'

'

0

'

0

'

'

0.2

'

-0.7

'

'

0.2

'

'

'

'

-0.7

'

'

0

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

0.2

'

'

'

'

-0.7

'

'

0

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Issuance Cost

0

'

'

-1.3

0

'

'

'

'

'

'

'

'

'

'

'

-1.3

'

0

'

'

0

'

'

-1.3

'

'

-1.3

'

'

0

'

'

0

'

'

1.3

'

'

'

'

-1.3

'

'

-1.3

'

'

-1.3

'

'

-1.3

'

'

0

'

'

0

'

'

1.3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net cash provided by (used in) financing activities

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

291.6

'

316.4

'

'

0

'

'

315.1

'

'

-1.3

'

'

271.7

'

'

2.7

'

'

-613

'

'

'

'

291.6

'

'

291.6

'

'

315.1

'

'

-1.3

'

'

271.7

'

'

2.7

'

'

-296.6

'

-0.4

'

'

126

'

'

0

'

0

'

'

0

'

0

'

'

0

'

0

'

'

0

'

0

'

'

-0.4

'

126

'

'

0

'

0

'

'

0

'

0

'

'

-0.4

'

126

'

'

-0.4

'

'

'

'

126

'

'

0

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

-0.4

'

'

'

'

126

'

'

0

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net increase (decrease) in cash and cash equivalents

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

200.9

'

0

'

'

0

'

'

-0.1

'

'

0

'

'

200.6

'

'

0.4

'

'

0

'

'

'

'

200.9

'

'

200.9

'

'

-0.1

'

'

0

'

'

200.6

'

'

0.4

'

'

0

'

-4.2

'

'

2.6

'

'

0

'

0

'

'

0

'

0

'

'

0.1

'

0

'

'

0

'

0

'

'

-4.4

'

0.9

'

'

0.1

'

1.7

'

'

0

'

0

'

'

-4.2

'

2.6

'

'

-4.2

'

'

'

'

2.6

'

'

0.1

'

'

'

'

0

'

'

0

'

'

'

'

0

'

'

-4.4

'

'

'

'

0.9

'

'

0.1

'

'

'

'

1.7

'

'

0

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash and cash equivalents

'

'

'

'

'

'

'

'

'

'

'

'

'

12.3

213.2

'

213.2

0

0

0

0

0

0

0

0

0.1

0

0

0

211.8

211.8

11.2

1.4

1.4

1

0

0

0

12.3

213.2

'

213.2

'

213.2

213.2

12.3

0

0

0.1

0

0

0

211.8

211.8

11.2

1.4

1.4

1

0

0

0

12.3

3.2

'

3.2

16.5

0.6

0

0

0

0

0

0

0

0

0

0

0.1

0

0

0

0

0

0

0

0

0

11.2

1.3

1.3

15.6

0.4

1

1.9

1.9

0.9

0.2

0

0

0

0

0

12.3

3.2

3.2

16.5

0.6

12.3

'

3.2

'

'

3.2

16.5

0.6

0.1

'

0

'

'

0

0

0

0

'

0

'

'

0

0

0

11.2

'

1.3

'

'

1.3

15.6

0.4

1

'

1.9

'

'

1.9

0.9

0.2

0

'

0

'

'

0

0

0

16.5

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash and cash equivalents at end of period

'

'

'

'

'

'

'

'

'

'

'

'

'

$12.30

$213.20

'

$213.20

$0

$0

$0

$0

$0

$0

$0

$0

$0.10

$0

$0

$0

$211.80

$211.80

$11.20

$1.40

$1.40

$1

$0

$0

$0

$12.30

$213.20

'

$213.20

'

$213.20

$213.20

$12.30

$0

$0

$0.10

$0

$0

$0

$211.80

$211.80

$11.20

$1.40

$1.40

$1

$0

$0

$0

$12.30

$3.20

'

$3.20

$16.50

$0.60

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0

$0.10

$0

$0

$0

$0

$0

$0

$0

$0

$0

$11.20

$1.30

$1.30

$15.60

$0.40

$1

$1.90

$1.90

$0.90

$0.20

$0

$0

$0

$0

$0

$12.30

$3.20

$3.20

$16.50

$0.60

$12.30

'

$3.20

'

'

$3.20

$16.50

$0.60

$0.10

'

$0

'

'

$0

$0

$0

$0

'

$0

'

'

$0

$0

$0

$11.20

'

$1.30

'

'

$1.30

$15.60

$0.40

$1

'

$1.90

'

'

$1.90

$0.90

$0.20

$0

'

$0

'

'

$0

$0

$0

$16.50

'

'

'

'

'

'

'

'

'

'

'

'

'