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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, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Global OPEB Plans [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |  |
Service cost | $ 6 | $ 4 | $ 10 | $ 9
Interest cost | 49 | 50 | 98 | 100
Expected return on plan assets | 0 | 0 | 0 | 0
Amortization of prior service cost (credit) | (4) | (3) | (7) | (7)
Amortization of net actuarial (gains) losses | 8 | 5 | 16 | 10
Net periodic pension and OPEB (income) expense | 59 | 56 | 117 | 112
U.S. [Member] | Pension Plan [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |  |
Service cost including administrative expenses | 79 | 96 | 158 | 191
Interest cost | 536 | 553 | 1,072 | 1,106
Expected return on plan assets | (919) | (944) | (1,838) | (1,889)
Amortization of prior service cost (credit) | (1) | (1) | (2) | (2)
Amortization of net actuarial (gains) losses | (2) | (7) | (3) | (13)
Net periodic pension and OPEB (income) expense | (307) | (303) | (613) | (607)
U.S. [Member] | U.S. Hourly Pension Plan [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |  |
Discretionary employer contributions |  |  |  | 2,000
Non-U.S. [Member] | Pension Plan [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] |  |  |  |
Service cost | 40 | 59 | 86 | 115
Interest cost | 126 | 126 | 251 | 257
Expected return on plan assets | (172) | (177) | (343) | (359)
Amortization of prior service cost (credit) | 1 | 3 | 2 | 6
Amortization of net actuarial (gains) losses | 48 | 35 | 95 | 70
Net periodic pension and OPEB (income) expense | $ 43 | $ 46 | $ 91 | $ 89

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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. + 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=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan. + 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)(5) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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