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Pension Benefit Plans (PBO) (Details) - Pension benefit plans - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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U.S. Pension Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Projected benefit obligation | $ 2,718 | $ 2,468
Fair value of plan assets | 2,125 | 1,866
Non-U.S. Pension Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Projected benefit obligation | 1,366 | 778
Fair value of plan assets | $ 441 | $ 370

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- Definition Amount of plan asset for defined benefit pension plan with projected benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920 + Details
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- Definition Amount of projected benefit obligation for defined benefit pension plan with projected benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920 + Details
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