Pension and Other Postretirement Benefit Plans (Expected Benefit Payments) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
United States Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2012	$ 307
2013	266
2014	261
2015	258
2016	264
2017-2021	1,278
Foreign Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2012	22
2013	20
2014	24
2015	22
2016	22
2017-2021	130
Other Postretirement Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2012	58
2013	51
2014	50
2015	48
2016	44
2017-2021	$ 177