|
Marketable Securities by Contractual Maturities (Detail) (USD $)
In Millions, unless otherwise specified |
Jun. 30, 2012
|
|---|---|
| Schedule Of Marketable Securities [Line Items] | |
| Marketable securities | $ 8,090 |
|
Due in one year
|
|
| Schedule Of Marketable Securities [Line Items] | |
| Marketable securities | 5,369 |
|
Due in one to two years
|
|
| Schedule Of Marketable Securities [Line Items] | |
| Marketable securities | $ 2,721 |