Segment Information (Operating Revenues by Service and Products) (Details) (USD $)	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended		6 Months Ended	9 Months Ended		0 Months Ended	3 Months Ended		6 Months Ended	9 Months Ended		0 Months Ended	3 Months Ended		6 Months Ended	9 Months Ended		0 Months Ended	3 Months Ended		6 Months Ended	9 Months Ended		0 Months Ended	3 Months Ended		6 Months Ended	9 Months Ended		0 Months Ended	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2013 Successor [Member]	Sep. 30, 2013 Successor [Member]	Sep. 30, 2013 Successor [Member] Services [Member]	Sep. 30, 2013 Successor [Member] Services [Member]		Sep. 30, 2013 Successor [Member] Equipment [Member]	Sep. 30, 2013 Successor [Member] Equipment [Member]		Sep. 30, 2013 Successor [Member] Voice [Member]	Sep. 30, 2013 Successor [Member] Voice [Member]		Sep. 30, 2013 Successor [Member] Data [Member]	Sep. 30, 2013 Successor [Member] Data [Member]		Sep. 30, 2013 Successor [Member] Internet [Member]	Sep. 30, 2013 Successor [Member] Internet [Member]		Sep. 30, 2013 Successor [Member] Other Products or Services [Member]	Sep. 30, 2013 Successor [Member] Other Products or Services [Member]		Sep. 30, 2013 Successor [Member] Wireless [Member]	Sep. 30, 2013 Successor [Member] Wireless [Member]	Sep. 30, 2013 Successor [Member] Wireless [Member] Services [Member]	Sep. 30, 2013 Successor [Member] Wireless [Member] Services [Member]	Sep. 30, 2013 Successor [Member] Wireless [Member] Equipment [Member]	Sep. 30, 2013 Successor [Member] Wireless [Member] Equipment [Member]	Sep. 30, 2013 Successor [Member] Wireless [Member] Voice [Member]	Sep. 30, 2013 Successor [Member] Wireless [Member] Voice [Member]	Sep. 30, 2013 Successor [Member] Wireless [Member] Data [Member]	Sep. 30, 2013 Successor [Member] Wireless [Member] Data [Member]	Sep. 30, 2013 Successor [Member] Wireless [Member] Internet [Member]	Sep. 30, 2013 Successor [Member] Wireless [Member] Internet [Member]	Sep. 30, 2013 Successor [Member] Wireless [Member] Other Products or Services [Member]	Sep. 30, 2013 Successor [Member] Wireless [Member] Other Products or Services [Member]	Sep. 30, 2013 Successor [Member] Wireline [Member]	Sep. 30, 2013 Successor [Member] Wireline [Member]	Sep. 30, 2013 Successor [Member] Wireline [Member] Services [Member]	Sep. 30, 2013 Successor [Member] Wireline [Member] Services [Member]	Sep. 30, 2013 Successor [Member] Wireline [Member] Equipment [Member]	Sep. 30, 2013 Successor [Member] Wireline [Member] Equipment [Member]	Sep. 30, 2013 Successor [Member] Wireline [Member] Voice [Member]	Sep. 30, 2013 Successor [Member] Wireline [Member] Voice [Member]	Sep. 30, 2013 Successor [Member] Wireline [Member] Data [Member]	Sep. 30, 2013 Successor [Member] Wireline [Member] Data [Member]	Sep. 30, 2013 Successor [Member] Wireline [Member] Internet [Member]	Sep. 30, 2013 Successor [Member] Wireline [Member] Internet [Member]	Sep. 30, 2013 Successor [Member] Wireline [Member] Other Products or Services [Member]	Sep. 30, 2013 Successor [Member] Wireline [Member] Other Products or Services [Member]	Sep. 30, 2013 Successor [Member] Corporate, Other And Eliminations [Member]		Sep. 30, 2013 Successor [Member] Corporate, Other And Eliminations [Member]		Sep. 30, 2013 Successor [Member] Corporate, Other And Eliminations [Member] Services [Member]		Sep. 30, 2013 Successor [Member] Corporate, Other And Eliminations [Member] Services [Member]		Sep. 30, 2013 Successor [Member] Corporate, Other And Eliminations [Member] Equipment [Member]		Sep. 30, 2013 Successor [Member] Corporate, Other And Eliminations [Member] Equipment [Member]		Sep. 30, 2013 Successor [Member] Corporate, Other And Eliminations [Member] Voice [Member]		Sep. 30, 2013 Successor [Member] Corporate, Other And Eliminations [Member] Voice [Member]		Sep. 30, 2013 Successor [Member] Corporate, Other And Eliminations [Member] Data [Member]		Sep. 30, 2013 Successor [Member] Corporate, Other And Eliminations [Member] Data [Member]		Sep. 30, 2013 Successor [Member] Corporate, Other And Eliminations [Member] Internet [Member]		Sep. 30, 2013 Successor [Member] Corporate, Other And Eliminations [Member] Internet [Member]		Sep. 30, 2013 Successor [Member] Corporate, Other And Eliminations [Member] Other Products or Services [Member]		Sep. 30, 2013 Successor [Member] Corporate, Other And Eliminations [Member] Other Products or Services [Member]		Jul. 10, 2013 Predecessor [Member]	Sep. 30, 2012 Predecessor [Member]	Jul. 10, 2013 Predecessor [Member]	Sep. 30, 2012 Predecessor [Member]	Jul. 10, 2013 Predecessor [Member] Services [Member]	Sep. 30, 2012 Predecessor [Member] Services [Member]	Jul. 10, 2013 Predecessor [Member] Services [Member]	Sep. 30, 2012 Predecessor [Member] Services [Member]	Jul. 10, 2013 Predecessor [Member] Equipment [Member]	Sep. 30, 2012 Predecessor [Member] Equipment [Member]	Jul. 10, 2013 Predecessor [Member] Equipment [Member]	Sep. 30, 2012 Predecessor [Member] Equipment [Member]	Jul. 10, 2013 Predecessor [Member] Voice [Member]	Sep. 30, 2012 Predecessor [Member] Voice [Member]	Jul. 10, 2013 Predecessor [Member] Voice [Member]	Sep. 30, 2012 Predecessor [Member] Voice [Member]	Jul. 10, 2013 Predecessor [Member] Data [Member]	Sep. 30, 2012 Predecessor [Member] Data [Member]	Jul. 10, 2013 Predecessor [Member] Data [Member]	Sep. 30, 2012 Predecessor [Member] Data [Member]	Jul. 10, 2013 Predecessor [Member] Internet [Member]	Sep. 30, 2012 Predecessor [Member] Internet [Member]	Jul. 10, 2013 Predecessor [Member] Internet [Member]	Sep. 30, 2012 Predecessor [Member] Internet [Member]	Jul. 10, 2013 Predecessor [Member] Other Products or Services [Member]	Sep. 30, 2012 Predecessor [Member] Other Products or Services [Member]	Jul. 10, 2013 Predecessor [Member] Other Products or Services [Member]	Sep. 30, 2012 Predecessor [Member] Other Products or Services [Member]	Jul. 10, 2013 Predecessor [Member] Wireless [Member]	Sep. 30, 2012 Predecessor [Member] Wireless [Member]	Jul. 10, 2013 Predecessor [Member] Wireless [Member]	Sep. 30, 2012 Predecessor [Member] Wireless [Member]	Jul. 10, 2013 Predecessor [Member] Wireless [Member] Services [Member]	Sep. 30, 2012 Predecessor [Member] Wireless [Member] Services [Member]	Jul. 10, 2013 Predecessor [Member] Wireless [Member] Services [Member]	Sep. 30, 2012 Predecessor [Member] Wireless [Member] Services [Member]	Jul. 10, 2013 Predecessor [Member] Wireless [Member] Equipment [Member]	Sep. 30, 2012 Predecessor [Member] Wireless [Member] Equipment [Member]	Jul. 10, 2013 Predecessor [Member] Wireless [Member] Equipment [Member]	Sep. 30, 2012 Predecessor [Member] Wireless [Member] Equipment [Member]	Jul. 10, 2013 Predecessor [Member] Wireless [Member] Voice [Member]	Sep. 30, 2012 Predecessor [Member] Wireless [Member] Voice [Member]	Jul. 10, 2013 Predecessor [Member] Wireless [Member] Voice [Member]	Sep. 30, 2012 Predecessor [Member] Wireless [Member] Voice [Member]	Jul. 10, 2013 Predecessor [Member] Wireless [Member] Data [Member]	Sep. 30, 2012 Predecessor [Member] Wireless [Member] Data [Member]	Jul. 10, 2013 Predecessor [Member] Wireless [Member] Data [Member]	Sep. 30, 2012 Predecessor [Member] Wireless [Member] Data [Member]	Jul. 10, 2013 Predecessor [Member] Wireless [Member] Internet [Member]	Sep. 30, 2012 Predecessor [Member] Wireless [Member] Internet [Member]	Jul. 10, 2013 Predecessor [Member] Wireless [Member] Internet [Member]	Sep. 30, 2012 Predecessor [Member] Wireless [Member] Internet [Member]	Jul. 10, 2013 Predecessor [Member] Wireless [Member] Other Products or Services [Member]	Sep. 30, 2012 Predecessor [Member] Wireless [Member] Other Products or Services [Member]	Jul. 10, 2013 Predecessor [Member] Wireless [Member] Other Products or Services [Member]	Sep. 30, 2012 Predecessor [Member] Wireless [Member] Other Products or Services [Member]	Jul. 10, 2013 Predecessor [Member] Wireline [Member]	Sep. 30, 2012 Predecessor [Member] Wireline [Member]	Jul. 10, 2013 Predecessor [Member] Wireline [Member]	Sep. 30, 2012 Predecessor [Member] Wireline [Member]	Jul. 10, 2013 Predecessor [Member] Wireline [Member] Services [Member]	Sep. 30, 2012 Predecessor [Member] Wireline [Member] Services [Member]	Jul. 10, 2013 Predecessor [Member] Wireline [Member] Services [Member]	Sep. 30, 2012 Predecessor [Member] Wireline [Member] Services [Member]	Jul. 10, 2013 Predecessor [Member] Wireline [Member] Equipment [Member]	Sep. 30, 2012 Predecessor [Member] Wireline [Member] Equipment [Member]	Jul. 10, 2013 Predecessor [Member] Wireline [Member] Equipment [Member]	Sep. 30, 2012 Predecessor [Member] Wireline [Member] Equipment [Member]	Jul. 10, 2013 Predecessor [Member] Wireline [Member] Voice [Member]	Sep. 30, 2012 Predecessor [Member] Wireline [Member] Voice [Member]	Jul. 10, 2013 Predecessor [Member] Wireline [Member] Voice [Member]	Sep. 30, 2012 Predecessor [Member] Wireline [Member] Voice [Member]	Jul. 10, 2013 Predecessor [Member] Wireline [Member] Data [Member]	Sep. 30, 2012 Predecessor [Member] Wireline [Member] Data [Member]	Jul. 10, 2013 Predecessor [Member] Wireline [Member] Data [Member]	Sep. 30, 2012 Predecessor [Member] Wireline [Member] Data [Member]	Jul. 10, 2013 Predecessor [Member] Wireline [Member] Internet [Member]	Sep. 30, 2012 Predecessor [Member] Wireline [Member] Internet [Member]	Jul. 10, 2013 Predecessor [Member] Wireline [Member] Internet [Member]	Sep. 30, 2012 Predecessor [Member] Wireline [Member] Internet [Member]	Jul. 10, 2013 Predecessor [Member] Wireline [Member] Other Products or Services [Member]	Sep. 30, 2012 Predecessor [Member] Wireline [Member] Other Products or Services [Member]	Jul. 10, 2013 Predecessor [Member] Wireline [Member] Other Products or Services [Member]	Sep. 30, 2012 Predecessor [Member] Wireline [Member] Other Products or Services [Member]	Jul. 10, 2013 Predecessor [Member] Corporate, Other And Eliminations [Member]	Sep. 30, 2012 Predecessor [Member] Corporate, Other And Eliminations [Member]	Jul. 10, 2013 Predecessor [Member] Corporate, Other And Eliminations [Member]	Sep. 30, 2012 Predecessor [Member] Corporate, Other And Eliminations [Member]	Jul. 10, 2013 Predecessor [Member] Corporate, Other And Eliminations [Member] Services [Member]	Sep. 30, 2012 Predecessor [Member] Corporate, Other And Eliminations [Member] Services [Member]		Jul. 10, 2013 Predecessor [Member] Corporate, Other And Eliminations [Member] Services [Member]	Sep. 30, 2012 Predecessor [Member] Corporate, Other And Eliminations [Member] Services [Member]		Jul. 10, 2013 Predecessor [Member] Corporate, Other And Eliminations [Member] Equipment [Member]	Sep. 30, 2012 Predecessor [Member] Corporate, Other And Eliminations [Member] Equipment [Member]		Jul. 10, 2013 Predecessor [Member] Corporate, Other And Eliminations [Member] Equipment [Member]	Sep. 30, 2012 Predecessor [Member] Corporate, Other And Eliminations [Member] Equipment [Member]		Jul. 10, 2013 Predecessor [Member] Corporate, Other And Eliminations [Member] Voice [Member]	Sep. 30, 2012 Predecessor [Member] Corporate, Other And Eliminations [Member] Voice [Member]		Jul. 10, 2013 Predecessor [Member] Corporate, Other And Eliminations [Member] Voice [Member]	Sep. 30, 2012 Predecessor [Member] Corporate, Other And Eliminations [Member] Voice [Member]		Jul. 10, 2013 Predecessor [Member] Corporate, Other And Eliminations [Member] Data [Member]	Sep. 30, 2012 Predecessor [Member] Corporate, Other And Eliminations [Member] Data [Member]		Jul. 10, 2013 Predecessor [Member] Corporate, Other And Eliminations [Member] Data [Member]	Sep. 30, 2012 Predecessor [Member] Corporate, Other And Eliminations [Member] Data [Member]		Jul. 10, 2013 Predecessor [Member] Corporate, Other And Eliminations [Member] Internet [Member]	Sep. 30, 2012 Predecessor [Member] Corporate, Other And Eliminations [Member] Internet [Member]		Jul. 10, 2013 Predecessor [Member] Corporate, Other And Eliminations [Member] Internet [Member]	Sep. 30, 2012 Predecessor [Member] Corporate, Other And Eliminations [Member] Internet [Member]		Jul. 10, 2013 Predecessor [Member] Corporate, Other And Eliminations [Member] Other Products or Services [Member]	Sep. 30, 2012 Predecessor [Member] Corporate, Other And Eliminations [Member] Other Products or Services [Member]		Jul. 10, 2013 Predecessor [Member] Corporate, Other And Eliminations [Member] Other Products or Services [Member]	Sep. 30, 2012 Predecessor [Member] Corporate, Other And Eliminations [Member] Other Products or Services [Member]
Segment Reporting Information [Line Items]
Revenues	$ 7,749,000,000	$ 7,749,000,000	$ 6,399,000,000	$ 6,399,000,000	[1]	$ 636,000,000	$ 636,000,000	[1]	$ 213,000,000	$ 213,000,000	[1]	$ 34,000,000	$ 34,000,000	[1]	$ 327,000,000	$ 327,000,000	[1]	$ 140,000,000	$ 140,000,000	[1]	$ 7,159,000,000	$ 7,159,000,000	$ 6,399,000,000	$ 6,399,000,000	$ 636,000,000	$ 636,000,000	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 124,000,000	$ 124,000,000	$ 777,000,000	$ 777,000,000	$ 0	$ 0	$ 0	$ 0	$ 333,000,000	$ 333,000,000	$ 57,000,000	$ 57,000,000	$ 373,000,000	$ 373,000,000	$ 14,000,000	$ 14,000,000	$ (187,000,000)	[1]	$ (187,000,000)	[1]	$ 0	[1]	$ 0	[1]	$ 0	[1]	$ 0	[1]	$ (120,000,000)	[1]	$ (120,000,000)	[1]	$ (23,000,000)	[1]	$ (23,000,000)	[1]	$ (46,000,000)	[1]	$ (46,000,000)	[1]	$ 2,000,000	[1]	$ 2,000,000	[1]	$ 932,000,000	$ 8,763,000,000	$ 18,602,000,000	$ 26,340,000,000	$ 769,000,000	$ 7,171,000,000	$ 15,139,000,000	$ 21,473,000,000	$ 74,000,000	$ 750,000,000	$ 1,707,000,000	$ 2,238,000,000	$ 27,000,000	$ 268,000,000	$ 535,000,000	$ 854,000,000	$ 4,000,000	$ 50,000,000	$ 95,000,000	$ 170,000,000	$ 42,000,000	$ 381,000,000	$ 813,000,000	$ 1,189,000,000	$ 16,000,000	$ 143,000,000	$ 313,000,000	$ 416,000,000	$ 858,000,000	$ 8,042,000,000	$ 17,125,000,000	$ 24,059,000,000	$ 769,000,000	$ 7,171,000,000	$ 15,139,000,000	$ 21,473,000,000	$ 74,000,000	$ 750,000,000	$ 1,707,000,000	$ 2,238,000,000	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 15,000,000	$ 121,000,000	$ 279,000,000	$ 348,000,000	$ 98,000,000	$ 939,000,000	$ 1,901,000,000	$ 2,932,000,000	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 42,000,000	$ 399,000,000	$ 771,000,000	$ 1,242,000,000	$ 7,000,000	$ 95,000,000	$ 188,000,000	$ 302,000,000	$ 47,000,000	$ 428,000,000	$ 913,000,000	$ 1,330,000,000	$ 2,000,000	$ 17,000,000	$ 29,000,000	$ 58,000,000	$ (24,000,000)	$ (218,000,000)	$ (424,000,000)	$ (651,000,000)	$ 0	$ 0	[1]	$ 0	$ 0	[1]	$ 0	$ 0	[1]	$ 0	$ 0	[1]	$ (15,000,000)	$ (131,000,000)	[1]	$ (236,000,000)	$ (388,000,000)	[1]	$ (3,000,000)	$ (45,000,000)	[1]	$ (93,000,000)	$ (132,000,000)	[1]	$ (5,000,000)	$ (47,000,000)	[1]	$ (100,000,000)	$ (141,000,000)	[1]	$ (1,000,000)	$ 5,000,000	[1]	$ 5,000,000	$ 10,000,000	[1]
Segment Reporting Information, Total Net Operating Revenues	$ 7,749,000,000	$ 7,749,000,000																			$ 7,159,000,000	$ 7,159,000,000													$ 586,000,000	$ 586,000,000													$ 4,000,000		$ 4,000,000																										$ 932,000,000	$ 8,763,000,000	$ 18,602,000,000	$ 26,340,000,000																									$ 858,000,000	$ 8,042,000,000	$ 17,125,000,000	$ 24,059,000,000																									$ 74,000,000	$ 717,000,000	$ 1,471,000,000	$ 2,272,000,000																									$ 0	$ 4,000,000	$ 6,000,000	$ 9,000,000

[1] eliminated in consolidation consist primarily of wireline services provided to the Wireless segment for resale to or use by wireless subscribers.