Fair Value Measurements (Schedule Of Maturities On Debt Securities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014
Fair Value Measurements [Abstract]
Less than 1 year	$ 17
1-5 years	466
5-10 years	263
More than 10 years	384
Total maturities of debt securities	$ 1,130

Fair value of available-for-sale debt securities maturing in the sixth fiscal year through the tenth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Fair value of available-for-sale debt securities maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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Fair value of available-for-sale debt securities maturing after the tenth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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Fair value of available-for-sale debt securities maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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Amount of debt securities categorized neither as held-to-maturity nor trading.

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