Contractual Maturity Date of Marketable Debt Securities (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
Investments Classified by Contractual Maturity Date [Line Items]
Due in 1 year	$ 13,242
Due in 1 year through 5 years	7,482
Due in 5 years through 10 years	5,525
Due after 10 years	8,087
Total	$ 34,336

This item represents the fair value of debt securities which are expected to mature after five years and through ten years from the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.

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This item represents the fair value of debt securities which are expected to mature after one year and through five years from the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.

+ References+ Details

- Definition

This item represents the fair value of debt securities which are expected to mature within one year of the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.

+ References+ Details

- Definition

For an unclassified balance sheet, total of debt securities categorized neither as held-to-maturity nor trading.

+ References

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+ Details