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Note 12 - Pension and Postretirement Benefit Plans - Estimated Future Benefit Payments (Details)
$ in Millions
Dec. 31, 2020
USD ($)
UNITED STATES | Pension Plan [Member]  
2021 $ 51
2022 51
2023 50
2024 50
2025 49
2026 to 2030 229
Total 480
UNITED STATES | Other Postretirement Benefits Plan [Member]  
2021 0
2026 to 2030 1
Total 1
Foreign Plan [Member] | Pension Plan [Member]  
2021 17
2022 16
2023 16
2024 20
2025 17
2026 to 2030 109
Total 195
Foreign Plan [Member] | Other Postretirement Benefits Plan [Member]  
2021 5
2022 5
2023 5
2024 5
2025 5
2026 to 2030 24
Total $ 49