Stock-Based Compensation (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended		9 Months Ended	12 Months Ended		3 Months Ended
	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011 CenturyLink	Dec. 31, 2013 CenturyLink	Dec. 31, 2012 CenturyLink	Mar. 31, 2012 Predecessor	Mar. 31, 2012 Predecessor QCII
Stock-based compensation
Stock based compensation expense				$ 19	$ 17	$ 18		$ 3
Income tax benefit recognized, associated with stock compensation expense	$ 7	$ 7	$ 7				$ 1