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Note 14 - Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2023

Notes Tables

Schedule of Loss Contingencies by Contingency, Environmental [Table Text Block]

Millions, for the Nine Months Ended September 30,		2023				2022
Beginning balance		$	253			$	243
Accruals			85				65
Payments			(75	)			(45	)
Ending balance at September 30,		$	263			$	263
Current portion, ending balance at September 30,		$	83			$	64

Personal Injury [Member]

Notes Tables

Schedule of Loss Contingencies by Contingency [Table Text Block]

Millions, for the Nine Months Ended September 30,		2023				2022
Beginning balance		$	361			$	325
Current year accruals			81				79
Changes in estimates for prior years			55				36
Payments			(104	)			(93	)
Ending balance at September 30,		$	393			$	347
Current portion, ending balance at September 30,		$	105			$	77

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+ References

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-Topic 450
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-URI https://asc.fasb.org//1943274/2147483076/450-20-50-1

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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
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-SubTopic 10
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-Section 50
-Paragraph 3
-Publisher FASB
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