Condensed Consolidated Statement Of Equity (Parenthetical) (USD $)	2 Months Ended			1 Months Ended
	Mar. 31, 2013 Successor [Member] Accumulated Deficit	Mar. 31, 2013 Successor [Member] Total Shareholder’s Equity/ Parent’s Net Investment	Mar. 31, 2013 Successor [Member] Non- controlling Interest	Jan. 23, 2013 CyrusOne L.P. [Member] 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