Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2021

Commitments and Contingencies Disclosure [Abstract]

Schedule of Loss Contingencies by Contingency

The following table summarizes the activity in the Company’s accrued obligations for personal injury claims (in millions):

 

	Years ended December 31,
	2021		2020		2019
Beginning balance	$	273	$	275	$	308
Accruals / changes in estimates	61		45		80
Payments	(38)		(47)		(113)
Ending balance	$	296	$	273	$	275
Current portion of ending balance	$	85	$	75	$	75

Accrued Obligations for Environmental Matters

The following table summarizes the activity in the Company’s accrued obligations for environmental matters (in millions):

	Years ended December 31,
	2021		2020		2019
Beginning balance	$	265	$	282	$	298
Accruals / changes in estimates	3		2		5
Payments	(17)		(19)		(21)
Ending balance	$	251	$	265	$	282
Current portion of ending balance	$	35	$	35	$	40