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Pensions Benefit Plans and Other Postretirement Benefits - Changes in the Benefit Obligation (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Pension Benefit Plans | U.S. |  |  |
Changes in the pension and postretirement benefit obligations |  |  |
Obligations at beginning of year | $ 1,650 | $ 1,956 |
Change in benefit obligations: |  |  |
Service cost | 14 | 14 | $ 15
Interest cost | 59 | 78 | 90
Actuarial (gain) loss, including the effect of change in discount rates | (108) | 123 |
Settlements | (114) | (393) |
Benefit payments | (91) | (128) |
Other | 3 |  |
Net change in benefit obligations | (237) | (306) |
Obligations at end of year | 1,413 | 1,650 | 1,956
Pension Benefit Plans | Non-U.S. |  |  |
Changes in the pension and postretirement benefit obligations |  |  |
Obligations at beginning of year | 1,148 | 1,235 |
Change in benefit obligations: |  |  |
Service cost | 15 | 15 | 16
Interest cost | 32 | 40 | 44
Actuarial (gain) loss, including the effect of change in discount rates | (23) | (15) |
Settlements | (35) | (171) |
Participant contributions | 2 | 1 |
Benefit payments | (51) | (60) |
Foreign currency translation | (64) | 103 |
Other | (2) |  |
Net change in benefit obligations | (126) | (87) |
Obligations at end of year | 1,022 | 1,148 | 1,235
Other Postretirement Benefits | U.S. |  |  |
Changes in the pension and postretirement benefit obligations |  |  |
Obligations at beginning of year | 89 | 92 |
Change in benefit obligations: |  |  |
Interest cost | 3 | 4 | 4
Actuarial (gain) loss, including the effect of change in discount rates | (9) |  |
Benefit payments | (9) | (7) |
Net change in benefit obligations | (15) | (3) |
Obligations at end of year | 74 | 89 | 92
Other Postretirement Benefits | Non-U.S. |  |  |
Changes in the pension and postretirement benefit obligations |  |  |
Obligations at beginning of year | 89 | 81 |
Change in benefit obligations: |  |  |
Service cost | 1 | 1 | 1
Interest cost | 3 | 3 | 3
Actuarial (gain) loss, including the effect of change in discount rates | (4) | 1 |
Benefit payments | (2) | (2) |
Foreign currency translation | (7) | 5 |
Net change in benefit obligations | (9) | 8 |
Obligations at end of year | $ 80 | $ 89 | $ 81

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- References No definition available. + Details
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- Definition The amount of decrease that is related to an event that significantly reduces the expected years of future service of present employees or eliminates due to a curtailment, a settlement such as (a) making lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and (b) purchasing nonparticipating annuity contracts, and plan amendment such as changing an existing plan or the initiation of a new plan. + References No definition available. + Details
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- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive 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 (a)(4) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of actuarial present value of benefits attributed to service rendered by employee for 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 (a) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 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)(6) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of contributions received by defined benefit plan from participant which increase benefit obligation. + 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)(3) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of increase (decrease) in benefit obligation of defined benefit plan. + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of foreign currency translation gain (loss) which (increases) decreases benefit obligation 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 (a)(5) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of cost recognized for passage of time related to 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)(2) -URI http://asc.fasb.org/extlink&oid=82843861&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=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for 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)(1) -URI http://asc.fasb.org/extlink&oid=82843861&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)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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