Post-Employment Benefits - Information For Pension Plans With A Projected Benefit Obligation And An Accumulated Benefit Obligation In Excess Of Plan Assets (Details) - USD ($) $ in Millions |
Dec. 31, 2020 |
Dec. 31, 2019 |
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| Postemployment Benefits [Abstract] | ||
| Accumulated benefit obligation | $ 7,527 | $ 5,752 |
| Fair value of plan assets | 6,066 | 4,820 |
| Projected benefit obligation | 8,719 | 6,820 |
| Fair value of plan assets | $ 6,066 | $ 4,895 |
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- Definition Amount of plan asset for defined benefit pension plan with projected benefit obligation in excess of plan assets. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of plan asset for defined benefit plan with accumulated benefit obligation in excess of plan assets. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of projected benefit obligation for defined benefit pension plan with accumulated benefit obligation in excess of plan assets. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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