Employee Benefit Plans (Details 8) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
LESOP shares
Allocated shares	19,047	20,718
Unallocated shares	1,864	2,374
Total LESOP shares	20,911	23,092
U.S. [Member]
Benefit payments, which include estimated future service, are expected to be paid by the company in the next 10years
2012	1,053
2013	1,043
2014	1,046
2015	1,050
2016	1,062
2017-2021	5,261
International [Member]
Benefit payments, which include estimated future service, are expected to be paid by the company in the next 10years
2012	268
2013	316
2014	320
2015	344
2016	375
2017-2021	2,153
Other Benefits [Member]
Benefit payments, which include estimated future service, are expected to be paid by the company in the next 10years
2012	223
2013	229
2014	234
2015	240
2016	245
2017-2021	1,287