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Note 14 - Commitments and Contingencies - Environmental Liability Activity (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Balance $ 253 $ 243
Accruals 62 52
Payments (50) (29)
Balance 265 266
Balance, Current $ 78 $ 64