Commitments and Contingencies (Details) In Millions, unless otherwise specified	3 Months Ended	24 Months Ended	0 Months Ended	3 Months Ended	0 Months Ended		3 Months Ended
	Mar. 31, 2015 William Douglas Fulghum, et al. v. Embarq Corporation plaintiff	Dec. 31, 2007 William Douglas Fulghum, et al. v. Embarq Corporation USD ($)	Oct. 14, 2011 Abbott et al. v. Sprint Nextel et al. plaintiff	Mar. 31, 2015 Abbott et al. v. Sprint Nextel et al. plaintiff	Jul. 17, 2013 Comcast USD ($)	Sep. 13, 2006 Cargill Financial Markets, Plc and Citibank, N.A. EUR (€)	Mar. 31, 2015 Cargill Financial Markets, Plc and Citibank, N.A. USD ($)	Mar. 31, 2015 Fiber-optic cable installation state	Mar. 31, 2015 Securities actions lawsuit	Mar. 31, 2015 Derivative actions shareholder_derivative_action
Loss Contingencies
Effect of modifications made to Embarq's benefits program, greater than		$ 300
Number of plaintiffs have alleged breach of fiduciary duty (plaintiffs)			1,500
Number of plaintiffs, limited discovery				80
Breach of fiduciary duty claims	15
Damages sought by plaintiff					$ 80	€ 219	$ 238
Number of states in which service is provided (states)								34
Number of states in which final approval of settlements received (states)								32
Number of states where an action is pending								1
Number of states in which actions are not currently pending								1
Number of securities actions									1
Number of shareholder derivative actions										4