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Pensions and Other Postretirement Benefits Schedule of Net Benefit Costs (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Change in Assumptions for Pension Plans [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |  |
Reduction in Interest and Service Cost | $ 194 |  | $ 385 |
US Pension Plans [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |  |
Service cost including administrative expenses | 96 | $ 102 | 191 | $ 203
Interest cost | 553 | 688 | 1,106 | 1,377
Expected return on plan assets | (944) | (974) | (1,889) | (1,948)
Amortization of prior service cost (credit) | (1) | (1) | (2) | (2)
Amortization of net actuarial (gains) losses | (7) | 2 | (13) | 4
Curtailments, settlements and other | 0 | 0 | 0 | 0
Net periodic pension and OPEB (income) expense | (303) | (183) | (607) | (366)
U.S. Hourly Pension Plan [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |  |
Discretionary employer contributions |  |  | 2,000 |
Non-US Pension Plans [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |  |
Service cost | 89 | 95 | 174 | 195
Interest cost | 140 | 195 | 284 | 391
Expected return on plan assets | (179) | (202) | (361) | (405)
Amortization of prior service cost (credit) | 3 | 4 | 6 | 8
Amortization of net actuarial (gains) losses | 48 | 59 | 95 | 117
Curtailments, settlements and other | 0 | 107 | 0 | 107
Net periodic pension and OPEB (income) expense | 101 | 258 | 198 | 413
Global OPEB Plans [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |  |
Service cost | 4 | 6 | 9 | 12
Interest cost | 50 | 59 | 100 | 119
Expected return on plan assets | 0 | 0 | 0 | 0
Amortization of prior service cost (credit) | (3) | (3) | (7) | (6)
Amortization of net actuarial (gains) losses | 5 | 9 | 10 | 17
Curtailments, settlements and other | 0 | 0 | 0 | 0
Net periodic pension and OPEB (income) expense | $ 56 | $ 71 | $ 112 | $ 142

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- Definition The amount of gains or losses recognized in net periodic benefit cost. + 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)(4) -URI http://asc.fasb.org/extlink&oid=65897934&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 -Glossary Expected Return on Plan Assets -URI http://asc.fasb.org/extlink&oid=6512171 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)(3) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + 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 (h)(2) -URI http://asc.fasb.org/extlink&oid=65897934&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 (a)(2) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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