|
Composition of Other Intangible Assets Net (Detail) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 3 Months Ended | 3 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Mar. 31, 2013
|
Dec. 31, 2012
|
Mar. 31, 2013
Customer Lists (6 to 13 years)
|
Dec. 31, 2012
Customer Lists (6 to 13 years)
|
Mar. 31, 2013
Customer Lists (6 to 13 years)
Minimum
|
Mar. 31, 2013
Customer Lists (6 to 13 years)
Maximum
|
Mar. 31, 2013
Non-Network Internal-Use Software (3 To 7 Years)
|
Dec. 31, 2012
Non-Network Internal-Use Software (3 To 7 Years)
|
Mar. 31, 2013
Non-Network Internal-Use Software (3 To 7 Years)
Minimum
|
Mar. 31, 2013
Non-Network Internal-Use Software (3 To 7 Years)
Maximum
|
Mar. 31, 2013
Other (2 To 25 Years)
|
Dec. 31, 2012
Other (2 To 25 Years)
|
Mar. 31, 2013
Other (2 To 25 Years)
Minimum
|
Mar. 31, 2013
Other (2 To 25 Years)
Maximum
|
|
| Finite-Lived Intangible Assets [Line Items] | ||||||||||||||
| Gross Amount | $ 15,007 | $ 14,773 | $ 3,552 | $ 3,556 | $ 10,682 | $ 10,415 | $ 773 | $ 802 | ||||||
| Accumulated Amortization | (9,180) | (8,840) | (2,419) | (2,338) | (6,462) | (6,210) | (299) | (292) | ||||||
| Net Amount | $ 5,827 | $ 5,933 | $ 1,133 | $ 1,218 | $ 4,220 | $ 4,205 | $ 474 | $ 510 | ||||||
| Useful life for finite-lived intangible assets, years | 6 years | 13 years | 3 years | 7 years | 2 years | 25 years | ||||||||