Pension and Postretirement Benefit Plans (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net periodic benefit cost (benefit)
Defined benefit plan estimated current fiscal year employer contributions	$ 1,000,000,000
Qualified and Non-qualified Pension Benefits
Net periodic benefit cost (benefit)
Contributions made to the Company's plans	300,000,000
United States Qualified and Non-qualified Pension Benefits
Net periodic benefit cost (benefit)
Service cost	63,000,000	51,000,000
Interest cost	147,000,000	158,000,000
Expected return on plan assets	(248,000,000)	(232,000,000)
Amortization of prior service cost (benefit)	2,000,000	3,000,000
Amortization of net actuarial (gain) loss	117,000,000	83,000,000
Net periodic benefit cost (benefit)	81,000,000	63,000,000
Settlements, curtailments, special termination benefits and other	26,000,000
Net periodic benefit cost (benefit) after settlements, curtailments, special termination benefits and other	107,000,000	63,000,000
International Qualified and Non-qualified Pension Benefits
Net periodic benefit cost (benefit)
Service cost	31,000,000	28,000,000
Interest cost	61,000,000	62,000,000
Expected return on plan assets	(73,000,000)	(70,000,000)
Amortization of transition (asset) obligation	(1,000,000)
Amortization of prior service cost (benefit)	(4,000,000)	(3,000,000)
Amortization of net actuarial (gain) loss	30,000,000	28,000,000
Net periodic benefit cost (benefit)	44,000,000	45,000,000
Net periodic benefit cost (benefit) after settlements, curtailments, special termination benefits and other	44,000,000	45,000,000
Postretirement Benefits
Net periodic benefit cost (benefit)
Service cost	19,000,000	15,000,000
Interest cost	22,000,000	23,000,000
Expected return on plan assets	(21,000,000)	(19,000,000)
Amortization of prior service cost (benefit)	(18,000,000)	(18,000,000)
Amortization of net actuarial (gain) loss	27,000,000	26,000,000
Net periodic benefit cost (benefit)	29,000,000	27,000,000
Net periodic benefit cost (benefit) after settlements, curtailments, special termination benefits and other	29,000,000	27,000,000
Contributions made to the Company's plans	$ 37,000,000