Segment Information (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Non-cash adjustments to wireless date revenues		$ (268)		$ (235)
Number of customers individually accounting for more than ten percent of total operating revenues	0	0	0	0
Wireline [Member]
Number of countries outside the United States of America to which our Wireline segment provides products and services	150		150