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Investment Securities (Details 3) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014
Available For Sale Securities Debt Maturities Amortized Cost [Abstract]
Due within 1 year	$ 579
Due after 1 year but within 5 years	435
Due after 5 years but within 10 years	235
Due after 10 years	3,303
Total	4,552
Estimated Fair Value
Estimated Fair Value, Due within 1 year	580
Estimated Fair Value, Due after 1 year but within 5 years	442
Estimated Fair Value, Due after 5 years but within 10 years	251
Estimated Fair Value, Due after 10 years	3,427
Total	$ 4,700

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Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the sixth fiscal year through the tenth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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