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Note 15 - Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2022

Notes Tables

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

Millions, for the Nine Months Ended September 30,		2022				2021
Beginning balance		$	243			$	233
Accruals			65				56
Payments			(45	)			(41	)
Ending balance at September 30,		$	263			$	248
Current portion, ending balance at September 30,		$	64			$	60

Personal Injury [Member]

Notes Tables

Schedule of Loss Contingencies by Contingency [Table Text Block]

Millions, for the Nine Months Ended September 30,		2022				2021
Beginning balance		$	325			$	270
Current year accruals			79				69
Changes in estimates for prior years			36				19
Payments			(93	)			(55	)
Ending balance at September 30,		$	347			$	303
Current portion, ending balance at September 30,		$	77			$	62

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