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Pension Plans and Other Post Employment Benefit Plans Components of net periodic benefit cost (credit) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Jun. 01, 2019 | May 31, 2019 | Dec. 31, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan |  |  |  |  |  | $ 5,800 |  |
Restricted Cash |  |  |  |  |  | $ 319 |  |
Discount Rate |  |  |  |  |  |  | 3.64% | 4.23%
Defined Benefit Plan Remeasurement Impact Underfunded Status |  |  | $ 114 |  | $ 114 |  |  |
Pension Plan |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |
Service Cost |  | $ 6 | 5 | $ 19 | 37 |  |  |
Interest Cost |  | 139 | 185 | 420 | 592 |  |  |
Expected return on plan assets |  | (250) | (253) | (750) | (839) |  |  |
Amortization of unrecognized loss (gain) |  | 1 | 0 | 3 | 2 |  |  |
Amortization of Prior Service Benefit |  | 0 | 0 | (1) | 0 |  |  |
Settlement/Curtailment Loss (Gain) |  | 0 | 1 | 3 | 0 |  |  |
Defined Benefit Plan, Net Periodic Benefit (Credit) Cost |  | (104) | (62) | (306) | (208) |  |  |
Other Benefit Plans |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |
Service Cost |  | 0 | 0 | 1 | 3 |  |  |
Interest Cost |  | 16 | 20 | 49 | 65 |  |  |
Amortization of unrecognized loss (gain) |  | 1 | 0 | 1 | (1) |  |  |
Discontinued Operations [Member] | Pension Plan |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit (Credit) Cost | [1] | 0 | 0 | 0 | (17) |  |  |
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax |  |  |  |  | (37) |  |  |
Continuing Operations [Member] | Pension Plan |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit (Credit) Cost |  | (104) | (62) | (306) | (191) |  |  |
Continuing Operations [Member] | Other Benefit Plans |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit (Credit) Cost |  | $ 17 | $ 20 | $ 51 | $ 67 |  |  |
[1] | Includes non-service related components of net periodic benefit credit of $(37) million for the nine months ended September 30, 2019.

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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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(4) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 + 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/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(5) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(5) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 + Details
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