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Note 14 - Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2023

Notes Tables

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

Millions, for the Six Months Ended June 30,		2023				2022
Beginning balance		$	253			$	243
Accruals			62				52
Payments			(50	)			(29	)
Ending balance at June 30,		$	265			$	266
Current portion, ending balance at June 30,		$	78			$	64

Personal Injury [Member]

Notes Tables

Schedule of Loss Contingencies by Contingency [Table Text Block]

Millions, for the Six Months Ended June 30,		2023				2022
Beginning balance		$	361			$	325
Current year accruals			52				51
Changes in estimates for prior years			31				36
Payments			(77	)			(65	)
Ending balance at June 30,		$	367			$	347
Current portion, ending balance at June 30,		$	98			$	70

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
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-Section 50
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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
-Topic 460
-SubTopic 10
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-Section 50
-Paragraph 3
-Publisher FASB
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