Discontinued Operations (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Expected proceeds from divesture of business	$ 4,900
Unfunded pension liabilities assumed	$ 250

- Definition

For the disposal group, including a component of the entity (discontinued operation), the benefit obligation for a defined benefit pension plan. The projected benefit obligation is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. The projected benefit obligation is measured using assumptions as to future compensation levels if the pension benefit formula is based on those future compensation levels (pay-related, final-pay, final-average-pay, or career-average-pay plans).

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