CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Cash Flows [Abstract]
Cash acquired in Savvis acquisition	$ 0	$ 0	$ 61,000,000
Cash acquired in Qwest acquisition, cash paid	0	0	5,000,000
Interest (paid) capitalized interest	$ 41,000,000	$ 43,000,000	$ 25,000,000