Acquisitions, Dispositions And Other Adjustments (Narrative) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		1 Months Ended	3 Months Ended	0 Months Ended	1 Months Ended		0 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013 Connecticut Wireline [Member] Disposition [Member] Pending Approval [Member]	Dec. 31, 2014 Connecticut Wireline [Member] Disposition [Member] Pending Approval [Member]	Mar. 13, 2014 Leap Wireless International [Member] Acquisition [Member]	Apr. 30, 2014 Leap Wireless International [Member] Acquisition [Member]	Mar. 31, 2014 Leap Wireless International [Member] Acquisition [Member]	Mar. 13, 2014 Leap Wireless International [Member] Acquisition [Member] Licenses [Member]	Mar. 13, 2014 Leap Wireless International [Member] Acquisition [Member] Property, Plant and Equipment [Member]	Mar. 13, 2014 Leap Wireless International [Member] Acquisition [Member] Customer Lists [Member]	Mar. 13, 2014 Leap Wireless International [Member] Acquisition [Member] Goodwill [Member]	Mar. 13, 2014 Leap Wireless International [Member] Acquisition [Member] Trade Names [Member]
Business Acquisition [Line Items]
Acquisition of assets - anticipated or actual acquisition date					Mar. 13, 2014
Acquisition of assets - anticipated or actual cash paid to seller	$ 662	$ 1,045			$ 1,248
Acquisition of assets - noncash consideration					one non-transferable contingent value right per share
Acquisition of business - purchase price (in US dollars per share)					$ 15
Acquisition of business - allocation to debt					3,889
Acquisition of business - repayments of debt						1,889	1,869
Acquisition of business - preliminary value/amount of assets acquired								3,070	520	490	346	340
Pendiing Acquisitions Dispositions
Disposition of asset - agreement period			2013-12
Disposition of business - estimated cash to be received from sale of subsidiary			$ 2,000
Disposition of business - anticipated or actual disposition period				Dec. 31, 2014