|
Expected Cash Flows for Pension and Postretirement Benefit Plans (Detail) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2011
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|---|---|
|
U.S. Pension Benefits
|
|
| Expected Benefit Payments: | |
| 2012 | $ 708 |
| 2013 | 789 |
| 2014 | 873 |
| 2015 | 966 |
| 2016 | 1,065 |
| 2017 - 2021 | 7,112 |
|
U.S. Pension Benefits | Plan Trusts
|
|
| Employer Contributions: | |
| Expected Employer Contribution in 2012 | 355 |
|
U.S. Pension Benefits | plan participants
|
|
| Employer Contributions: | |
| Expected Employer Contribution in 2012 | 13 |
|
U.S. Postretirement Medical Benefits
|
|
| Expected Benefit Payments: | |
| 2012 | 233 |
| 2013 | 253 |
| 2014 | 230 |
| 2015 | 246 |
| 2016 | 260 |
| 2017 - 2021 | 1,466 |
|
U.S. Postretirement Medical Benefits | Plan Trusts
|
|
| Employer Contributions: | |
| Expected Employer Contribution in 2012 | 371 |
|
U.S. Postretirement Medical Benefits | plan participants
|
|
| Employer Contributions: | |
| Expected Employer Contribution in 2012 | 101 |
|
International Pension Benefits
|
|
| Expected Benefit Payments: | |
| 2012 | 18 |
| 2013 | 17 |
| 2014 | 19 |
| 2015 | 21 |
| 2016 | 23 |
| 2017 - 2021 | 153 |
|
International Pension Benefits | Plan Trusts
|
|
| Employer Contributions: | |
| Expected Employer Contribution in 2012 | 53 |
|
International Pension Benefits | plan participants
|
|
| Employer Contributions: | |
| Expected Employer Contribution in 2012 | $ 3 |