Pension and Other Postretirement Benefits (Details) (USD $) In Millions | 3 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2011 | Jun. 30, 2011 | Jan. 31, 2011 | Dec. 31, 2010 | Sep. 30, 2011
Other Postretirement Benefit Plans, Defined Benefit [Member] | Sep. 30, 2010
Other Postretirement Benefit Plans, Defined Benefit [Member] | Sep. 30, 2011
Other Postretirement Benefit Plans, Defined Benefit [Member] | Sep. 30, 2010
Other Postretirement Benefit Plans, Defined Benefit [Member] | Sep. 30, 2011
United States Pension Plans Of US Entity Defined Benefit Member | Sep. 30, 2010
United States Pension Plans Of US Entity Defined Benefit Member | Sep. 30, 2011
United States Pension Plans Of US Entity Defined Benefit Member | Sep. 30, 2010
United States Pension Plans Of US Entity Defined Benefit Member | Sep. 30, 2011
Foreign Pension Plans Defined Benefit Member | Sep. 30, 2010
Foreign Pension Plans Defined Benefit Member | Sep. 30, 2011
Foreign Pension Plans Defined Benefit Member | Sep. 30, 2010
Foreign Pension Plans Defined Benefit Member | |
| Defined Benefit Plans Disclosures [Line Items] | ||||||||||||||||
| Service Cost | $ 0 | $ 1 | $ 1 | $ 2 | $ 58 | $ 55 | $ 174 | $ 166 | $ 14 | $ 12 | $ 44 | $ 38 | ||||
| Interest Cost | 17 | 19 | 52 | 62 | 190 | 192 | 571 | 576 | 60 | 56 | 180 | 169 | ||||
| Expected Return on Plan Assets | (253) | (225) | (760) | (676) | (72) | (59) | (215) | (177) | ||||||||
| Amortization of transition obligation | 0 | 0 | 1 | 0 | ||||||||||||
| Amortization of Prior Service Cost | (3) | (13) | (25) | (31) | 8 | 8 | 25 | 24 | 0 | 0 | (1) | 0 | ||||
| Recognition of Actuarial Losses | 10 | 9 | 28 | 23 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||
| Settlements and Curtailments | (106) | 0 | (167) | (46) | 0 | 0 | 24 | 0 | 1 | 0 | 2 | 4 | ||||
| Net Periodic Benefit Costs | (82) | 16 | (111) | 10 | 3 | 30 | 34 | 90 | 3 | 9 | 11 | 34 | ||||
| Pension And Other Post Retirement Disclosure Paragraph Details [Abstract] | ||||||||||||||||
| Voluntary cash contributions | 400 | 1,000 | 250 | |||||||||||||
| Curtailments | $ 106 | $ 61 | ||||||||||||||