Income Taxes (Details 3) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Accruals not currently deductible
Employee benefit costs	$ 96	$ 99
Product and other claims	155	148
Miscellaneous accruals	173	175
Pension costs	1,183	724
Stock-based compensation	483	501
Net operating/capital loss carryforwards	392	437
Foreign tax credits	286	281
Other	49	46
Gross deferred tax assets	2,817	2,411
Valuation allowance	(82)	(128)
Total deferred tax assets	2,735	2,283
Deferred tax liabilities:
Product and other insurance receivables	(63)	(59)
Accelerated depreciation	(745)	(695)
Intangible amortization	(798)	(823)
Total deferred tax liabilities	(1,606)	(1,577)
Net deferred tax asset	$ 1,129	$ 706