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Note 14 - Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2022

Notes Tables

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

Millions, for the Three Months Ended March 31,		2022				2021
Beginning balance		$	243			$	233
Accruals			40				12
Payments			(15	)			(11	)
Ending balance at March 31,		$	268			$	234
Current portion, ending balance at March 31,		$	64			$	63

Personal Injury [Member]

Notes Tables

Schedule of Loss Contingencies by Contingency [Table Text Block]

Millions, for the Three Months Ended March 31,		2022				2021
Beginning balance		$	325			$	270
Current year accruals			23				18
Changes in estimates for prior years			6				21
Payments			(22	)			(16	)
Ending balance at March 31,		$	332			$	293
Current portion, ending balance at March 31,		$	67			$	60

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