CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowance (in dollars)	$ 70	$ 76
Customer relationships, accumulated amortization (in dollars)	1,970	1,736
Other intangible assets, accumulated amortization (in dollars)	$ 888	$ 828
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	1,000	1,000
Common stock, shares issued, owned by CenturyLink, Inc.	1,000	1,000