Note 15 - Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2024

Notes Tables

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

Millions, for the Nine Months Ended September 30,	2024			2023
Beginning balance	$	245		$	253
Accruals		100			85
Payments		(76	)		(75	)
Ending balance at September 30,	$	269		$	263
Current portion, ending balance at September 30,	$	119		$	83

Personal Injury [Member]

Notes Tables

Schedule of Loss Contingencies by Contingency [Table Text Block]

Millions, for the Nine Months Ended September 30,	2024			2023
Beginning balance	$	383		$	361
Current year accruals		87			81
Changes in estimates for prior years		(2	)		55
Payments		(75	)		(104	)
Ending balance at September 30,	$	393		$	393
Current portion, ending balance at September 30,	$	114		$	105