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Note 11 - Pension and Postretirement Benefit Plans - Aggregate Funding Levels of Defined Benefit Pension Plans (Details) - Pension Plan [Member] - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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UNITED STATES |  |
Plans with fair value of plan assets in excess of obligations: |  |
Accumulated benefit obligation | $ 385 | $ 416
Projected benefit obligation | 385 | 416
Fair value of plan assets | 394 | 427
Plans with obligations in excess of fair value of plan assets: |  |
Accumulated benefit obligation | 126 | 133
Projected benefit obligation | 126 | 133
Fair value of plan assets | 99 | 103
Foreign Plan [Member] |  |
Plans with fair value of plan assets in excess of obligations: |  |
Accumulated benefit obligation | 23 | 31
Projected benefit obligation | 23 | 32
Fair value of plan assets | 26 | 33
Plans with obligations in excess of fair value of plan assets: |  |
Accumulated benefit obligation | 245 | 270
Projected benefit obligation | 271 | 298
Fair value of plan assets | $ 35 | $ 36

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