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Employee Benefit Plans - Summary of Change in Assets Measured at Level 3 (Details) - Level 3 - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
The effect of fair-value measurements using significant unobservable inputs on changes in Level 3 plan assets for the period are outlined below |  |
Beginning balance | $ 177 | $ 204
Actual Return on Plan Assets: |  |
Assets held at the reporting date | 6 | (19)
Assets sold during the period | (2) | (4)
Purchases, Sales and Settlements | 0 | (4)
Transfers in and/or out of Level 3 | (43) | 0
Ending balance | 138 | 177
International |  |
The effect of fair-value measurements using significant unobservable inputs on changes in Level 3 plan assets for the period are outlined below |  |
Beginning balance | 0 | 0
Actual Return on Plan Assets: |  |
Assets held at the reporting date | 1 | 0
Assets sold during the period | 0 | 0
Purchases, Sales and Settlements | 0 | 0
Transfers in and/or out of Level 3 | 0 | 0
Ending balance | 1 | 0
Corporate |  |
The effect of fair-value measurements using significant unobservable inputs on changes in Level 3 plan assets for the period are outlined below |  |
Beginning balance | 0 | 1
Actual Return on Plan Assets: |  |
Assets held at the reporting date | 0 | (1)
Assets sold during the period | 0 | 0
Purchases, Sales and Settlements | 0 | 0
Transfers in and/or out of Level 3 | 0 | 0
Ending balance | 0 | 0
Real Estate |  |
The effect of fair-value measurements using significant unobservable inputs on changes in Level 3 plan assets for the period are outlined below |  |
Beginning balance | 38 | 42
Actual Return on Plan Assets: |  |
Assets held at the reporting date | 5 | 0
Assets sold during the period | 0 | (4)
Purchases, Sales and Settlements | 0 | 0
Transfers in and/or out of Level 3 | (43) | 0
Ending balance | 0 | 38
Other |  |
The effect of fair-value measurements using significant unobservable inputs on changes in Level 3 plan assets for the period are outlined below |  |
Beginning balance | 139 | 161
Actual Return on Plan Assets: |  |
Assets held at the reporting date | 0 | (18)
Assets sold during the period | (2) | 0
Purchases, Sales and Settlements | 0 | (4)
Transfers in and/or out of Level 3 | 0 | 0
Ending balance | $ 137 | $ 139

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- Definition Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan from actual return (loss) on assets sold. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02)(A) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan from actual return (loss) on assets still held. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02)(A) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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