Severance, Exit Costs and Asset Impairments Severance, Exit Costs and Asset Impairments (Schedule of Severance and Exit Costs Liability) (Details) (Successor [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Jun. 30, 2014		Mar. 31, 2014
Restructuring Reserve [Roll Forward]
Restructuring Reserve	$ 738		$ 971
Supplemental Unemployment Benefits, Severance Benefits	117		197
Restructuring Charges	27
Restructuring Reserve, Settled with Cash	(260)
Severance Costs	6	[1]
Payments for Postemployment Benefits	(86)
Lease [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve	518		650
Restructuring reserved settled with cash and other adjustments	(135)
Access [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve	103		124
Restructuring Charges	18	[2],[3]
Restructuring reserved settled with cash and other adjustments	(39)
Wireline [Member]
Restructuring Reserve [Roll Forward]
Severance Costs	1	[1]
Wireline [Member] | Cost of products and services [Member] | Access [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges	3
Wireless [Member]
Restructuring Reserve [Roll Forward]
Severance Costs	5	[1]
Wireless [Member] | Lease [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges	3	[2]
Wireless [Member] | Access [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges	$ 15	[2]

[1] (2)For the Successor three-month period ended June 30, 2014, we recognized costs of $6 million ($5 million Wireless, $1 million Wireline).

[2] (1)For the Successor three-month period ended June 30, 2014, we recognized costs of $3 million (solely attributable to Wireless).

[3] (3)For the Successor three-month period ended June 30, 2014, we recognized costs of $18 million ($15 million Wireless, $3 million Wireline).