Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2013

Supplemental Cash Flow Information [Abstract]

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

	Year Ended December 31,
(dollars in millions)	2013		2012		2011
Capitalized interest expense	$	0.6	$	2.7	$	3.5
Cash paid (received) for:
Interest	179.5		217.9		211.8
Income taxes, net of refunds	2.8		0.1		(1.2		)
Noncash investing and financing activities:
Investment in CyrusOne resulting from deconsolidation	509.7		—		—
Accrual of CyrusOne dividends	7.1		—		—
Acquisition of property by assuming debt and other financing arrangements	7.6		19.9		49.7
Acquisition of property on account	13.3		30.7		22.8
Accrued CyrusOne stock issuance costs	—		2.2		—