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Postretirement Benefit Plans (Details) (USD $) In Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2011 | Sep. 30, 2010
Net periodic benefit cost: |  |  |  |
Service cost | $ 37 | $ 32 | $ 106 | $ 98
Interest cost | 94 | 94 | 277 | 281
Expected return on plan assets | (115) | (115) | (344) | (345)
Amortization of net actuarial loss | 32 | 23 | 94 | 71
Amortization of prior service cost | 1 | 1 | 2 | 2
Net periodic benefit cost | 49 | 35 | 135 | 107
Loss from curtailment/special termination benefits | 5 | 0 | 5 | 0
Total net periodic benefit cost | 54 | 35 | 140 | 107
Other changes in plan assets and benefit obligations recognized in other comprehensive income |  |  |  |
Net loss (gain) | 59 | 0 | 959 | 0
Prior service cost recognized from curtailment | (3) | 0 | (3) | 0
Amortization of net actuarial loss | (32) | (23) | (94) | (71)
Amortization of prior service cost | (1) | (1) | (2) | (2)
Total change recognized in other comprehensive income | 923 | (24) | 860 | (73)
Total impact from net periodic benefit cost and changes in other comprehensive income | 977 | 11 | 1,000 | 34
U.S. Pension Plans [Member] |  |  |  |
Net periodic benefit cost: |  |  |  |
Service cost | 30 | 27 | 87 | 81
Interest cost | 76 | 77 | 225 | 230
Expected return on plan assets | (102) | (104) | (307) | (311)
Amortization of net actuarial loss | 28 | 20 | 82 | 61
Amortization of prior service cost | 1 | 1 | 3 | 3
Net periodic benefit cost | 33 | 21 | 90 | 64
Loss from curtailment/special termination benefits | 5 | 0 | 5 | 0
Total net periodic benefit cost | 38 | 21 | 95 | 64
Other changes in plan assets and benefit obligations recognized in other comprehensive income |  |  |  |
Net loss (gain) | 49 | 0 | 949 | 0
Prior service cost recognized from curtailment | (3) | 0 | (3) | 0
Amortization of net actuarial loss | (28) | (20) | (82) | (61)
Amortization of prior service cost | (1) | (1) | (3) | (3)
Total change recognized in other comprehensive income | 917 | (21) | 861 | (64)
Total impact from net periodic benefit cost and changes in other comprehensive income | 955 | 0 | 956 | 0
International Pension Plan [Member] |  |  |  |
Net periodic benefit cost: |  |  |  |
Service cost | 6 | 4 | 14 | 12
Interest cost | 8 | 7 | 24 | 21
Expected return on plan assets | (7) | (6) | (20) | (18)
Amortization of net actuarial loss | 1 | 1 | 3 | 2
Amortization of prior service cost | 0 | 0 | 0 | 0
Net periodic benefit cost | 8 | 6 | 21 | 17
Loss from curtailment/special termination benefits | 0 | 0 | 0 | 0
Total net periodic benefit cost | 8 | 6 | 21 | 17
Other changes in plan assets and benefit obligations recognized in other comprehensive income |  |  |  |
Net loss (gain) | 10 | 0 | 10 | 0
Prior service cost recognized from curtailment | 0 | 0 | 0 | 0
Amortization of net actuarial loss | (1) | (1) | (3) | (2)
Amortization of prior service cost | 0 | 0 | 0 | 0
Total change recognized in other comprehensive income | 9 | (1) | 7 | (2)
Total impact from net periodic benefit cost and changes in other comprehensive income | 17 | 5 | 28 | 15
Total Pension Excluding Other Benefits (Member) |  |  |  |
Net periodic benefit cost: |  |  |  |
Service cost | 36 | 31 | 101 | 93
Interest cost | 84 | 84 | 249 | 251
Expected return on plan assets | (109) | (110) | (327) | (329)
Amortization of net actuarial loss | 29 | 21 | 85 | 63
Amortization of prior service cost | 1 | 1 | 3 | 3
Net periodic benefit cost | 41 | 27 | 111 | 81
Loss from curtailment/special termination benefits | 5 | 0 | 5 | 0
Total net periodic benefit cost | 46 | 27 | 116 | 81
Other changes in plan assets and benefit obligations recognized in other comprehensive income |  |  |  |
Net loss (gain) | 59 | 0 | 959 | 0
Prior service cost recognized from curtailment | (3) | 0 | (3) | 0
Amortization of net actuarial loss | (29) | (21) | (85) | (63)
Amortization of prior service cost | (1) | (1) | (3) | (3)
Total change recognized in other comprehensive income | 926 | (22) | 868 | (66)
Total impact from net periodic benefit cost and changes in other comprehensive income | 972 | 5 | 984 | 15
Other Benefits [Member] |  |  |  |
Net periodic benefit cost: |  |  |  |
Service cost | 1 | 1 | 5 | 5
Interest cost | 10 | 10 | 28 | 30
Expected return on plan assets | (6) | (5) | (17) | (16)
Amortization of net actuarial loss | 3 | 2 | 9 | 8
Amortization of prior service cost | 0 | 0 | (1) | (1)
Net periodic benefit cost | 8 | 8 | 24 | 26
Loss from curtailment/special termination benefits | 0 | 0 | 0 | 0
Total net periodic benefit cost | 8 | 8 | 24 | 26
Other changes in plan assets and benefit obligations recognized in other comprehensive income |  |  |  |
Net loss (gain) | 0 | 0 | 0 | 0
Prior service cost recognized from curtailment | 0 | 0 | 0 | 0
Amortization of net actuarial loss | (3) | (2) | (9) | (8)
Amortization of prior service cost | 0 | 0 | 1 | 1
Total change recognized in other comprehensive income | (3) | (2) | (8) | (7)
Total impact from net periodic benefit cost and changes in other comprehensive income | $ 5 | $ 6 | $ 16 | $ 19

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- Definition The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 + Details
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- Definition An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Expected Return on Plan Assets -URI http://asc.fasb.org/extlink&oid=6512136 -Topic 715 -SubTopic 30 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Expected Return on Plan Assets -URI http://asc.fasb.org/extlink&oid=6512171 -Topic 715 -SubTopic 60 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a, h -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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