Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2020

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):

	Nine Months Ended September 30,
	2020		2019
Beginning balance	$	275	$	308
Accruals / changes in estimates	36		69
Payments	(34)		(88)
Ending balance	$	277	$	289
Current portion of ending balance	$	75	$	85

Accrued Obligations for Environmental Matters

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

	Nine Months Ended September 30,
	2020		2019
Beginning balance	$	282	$	298
Accruals / changes in estimates	2		—
Payments	(15)		(16)
Ending balance	$	269	$	282
Current portion of ending balance	$	35	$	40