Commitments and Contingencies (Details) € in Millions, $ in Millions				6 Months Ended	24 Months Ended
	Jul. 17, 2013 USD ($)	Oct. 14, 2011 plaintiff	Sep. 13, 2006 EUR (€)	Jun. 30, 2015 USD ($) shareholder_derivative_action state plaintiff lawsuit	Dec. 31, 2007 USD ($)
William Douglas Fulghum, et al. v. Embarq Corporation
Loss Contingencies
Effect of modifications made to Embarq's benefits program, greater than | $					$ 300
Breach of fiduciary duty claims | plaintiff				15
Abbott et al. v. Sprint Nextel et al.
Loss Contingencies
Number of plaintiffs have alleged breach of fiduciary duty (plaintiffs) | plaintiff		1,500
Number of plaintiffs, limited discovery | plaintiff				80
Comcast
Loss Contingencies
Damages sought by plaintiff | $	$ 80
Cargill Financial Markets, Plc and Citibank, N.A.
Loss Contingencies
Damages sought by plaintiff			€ 219	$ 243
Fiber-optic cable installation
Loss Contingencies
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
Securities actions
Loss Contingencies
Number of securities actions | lawsuit				1
Derivative actions
Loss Contingencies
Number of shareholder derivative actions | shareholder_derivative_action				4