Severance, Exit Costs and Asset Impairments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 632		$ 692
Cost of products and services [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			657
Severance and Lease [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			541
Access [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	144	27	151
Access [Member] | Cost of products and services [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	28		35
Access [Member] | Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	116
Wireless [Member] | Severance and Lease [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	516		538
Wireless [Member] | Access [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	129	13	133
Wireline [Member] | Severance and Lease [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges			3
Wireline [Member] | Access [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 15	$ 14	$ 18