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Benefit Plans Estimated Future Benefit Payments (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013
Pension Benefits
Defined Benefit Plan Disclosure
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	$ 720
Defined Benefit Plan, Expected Future Benefit Payments, Year Two	719
Defined Benefit Plan, Expected Future Benefit Payments, Year Three	727
Defined Benefit Plan, Expected Future Benefit Payments, Year Four	731
Defined Benefit Plan, Expected Future Benefit Payments, Year Five	736
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter	3,773
Other Post-retirement Benefits
Defined Benefit Plan Disclosure
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	40
Defined Benefit Plan, Expected Future Benefit Payments, Year Two	42
Defined Benefit Plan, Expected Future Benefit Payments, Year Three	43
Defined Benefit Plan, Expected Future Benefit Payments, Year Four	44
Defined Benefit Plan, Expected Future Benefit Payments, Year Five	45
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter	$ 210

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- Definition

Amount of benefits expected to be paid in the five rolling twelve months after the fifth rolling twelve months following the latest balance sheet presented from a defined benefit plan.

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- Definition

Amount of benefits expected to be paid in the next rolling twelve months following the latest balance sheet presented from a defined benefit plan.

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- Definition

Amount of benefits expected to be paid in the fifth rolling twelve months following the latest balance sheet presented from a defined benefit plan.

+ References

No definition available.

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- Definition

Amount of benefits expected to be paid in the fourth rolling twelve months following the latest balance sheet presented from a defined benefit plan.

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No definition available.

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- Definition

Amount of benefits expected to be paid in the third rolling twelve months following the latest balance sheet presented from a defined benefit plan.

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No definition available.

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- Definition

Amount of benefits expected to be paid in the second rolling twelve months following the latest balance sheet presented from a defined benefit plan.

+ References

No definition available.

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