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Restructuring and Related Charges Restructuring Reserve (Details) - Financial Fitness Program [Member] $ in Millions	9 Months Ended
	Jun. 30, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Liability as of September 30, 2017	$ 69
Restructuring charges	4
Payments	52
Other	0
Liability as of June 30, 2018	21
Severance and employee related costs
Restructuring Cost and Reserve [Line Items]
Liability as of September 30, 2017	47
Restructuring charges	4
Payments	32
Other	0
Liability as of June 30, 2018	19
Contract termination
Restructuring Cost and Reserve [Line Items]
Liability as of September 30, 2017	22
Restructuring charges	0
Payments	20
Other	0
Liability as of June 30, 2018	$ 2

X

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

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- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

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Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability.

+ References

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