The amount of pension and other (such as medical, dental and life insurance) postretirement benefit costs recognized during the period for (1) defined benefit plans (periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss) on assets, prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments) and for (2) defined contribution plans (to the extent that a plan's defined contributions to an individual's account are to be made for periods in which that individual renders services, the net cost for a period is the contribution called for in that period; if a plan calls for contributions for periods after an individual retires or terminates, the estimated cost is accrued during the employee's service period).

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+ Details

Pension Plans and Other Postretirement Benefits (Details Textual) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Additional pension plans and other postretirement benefits (Textual) [Abstract]
Defined contribution pension and retirement savings plans total expense	$ 10,455,000,000	$ 9,461,000,000	$ 30,521,000,000	$ 29,926,000,000
Other Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Company contributions to defined benefit pension plan	$ 70,000,000