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Retirement Plans (Schedule of Net Periodic Benefit Cost And Other Comprehensive Loss (Earnings) For Pension And Other Postretirement Benefit Plans) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Net periodic benefit cost: |  |  |  |
Recognition of net actuarial loss (gain) (1) |  | Oil, gas and NGL derivatives | Oil, gas and NGL derivatives | Oil, gas and NGL derivatives
Pension Benefits [Member] |  |  |  |
Net periodic benefit cost: |  |  |  |
Interest cost |  | $ 31 | $ 34 | $ 19
Expected return on plan assets |  | (27) | (27) | (31)
Recognition of net actuarial loss (gain) | [1] | 7 | 6 | 6
Total net periodic benefit cost | [2] | 11 | 13 | (6)
Other comprehensive loss (earnings): |  |  |  |
Actuarial loss (gain) arising in current year |  | 4 | 16 | (11)
Recognition of net actuarial (loss) gain, including settlement expense, in net periodic benefit cost |  | (7) | (6) | (6)
Total other comprehensive loss (earnings) |  | (3) | 10 | (17)
Total |  | 8 | 23 | (23)
Postretirement Benefits [Member] |  |  |  |
Net periodic benefit cost: |  |  |  |
Recognition of net actuarial loss (gain) | [1] | (1) | (1) | (1)
Total net periodic benefit cost | [2] | (1) | (1) | (1)
Other comprehensive loss (earnings): |  |  |  |
Actuarial loss (gain) arising in current year |  | 0 | 0 | (4)
Recognition of net actuarial (loss) gain, including settlement expense, in net periodic benefit cost |  | 1 | 1 | 1
Total other comprehensive loss (earnings) |  | 1 | 1 | (3)
Total |  | $ 0 | $ 0 | $ (4)
[1] | These net periodic benefit costs were reclassified out of other comprehensive earnings in the current period.
[2] | The service cost component of net periodic benefit cost is included in G&A expense and the remaining components of net periodic benefit costs are included in other, net in the accompanying consolidated statements of comprehensive earnings.

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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/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 45 -Paragraph 3A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480535/715-20-45-3A Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-18 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h)(4) -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 6 -Subparagraph (a)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-6 + Details
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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. + 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 45 -Paragraph 3A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480535/715-20-45-3A Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-18 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h)(3) -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 6 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-6 + Details
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