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Retirement Benefit Liabilities (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]
Retiree medical liability	$ 468	$ 479
Pension liability	297	323
Other	15	16
Subtotal	780	818
Less: current portion (included in compensation and benefits, Note 14)	(43)	(43)
Retirement benefits	$ 737	$ 775

This represents the entire liability recognized in the balance sheet that is associated with the defined benefit pension plans.

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- Definition

This represents the entire liability recognized in the balance sheet that is associated with other postretirement defined benefit plans (excluding pension plans).

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- Definition

This represents the entire liability recognized in the balance sheet that is associated with the defined benefit plans.

+ References+ Details

- Definition

This represents the noncurrent liability for underfunded plans recognized in the balance sheet that is associated with the defined benefit pension plans and other postretirement defined benefit plans.

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