Product Warranty Liabilities (Tables)

6 Months Ended

Jun. 30, 2020

Guarantees And Product Warranties [Abstract]

Product Warranty Liability Activities

Product warranty liability activities consist of the following (dollars in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2020			2019			2020			2019
Beginning balance	$	51		$	64		$	52		$	66
Payments		(9	)		(6	)		(16	)		(12	)
Increase in liability (warranty issued during period)		3			6			8			11
Net adjustments to liability		3			(5	)		4			(6	)
Ending balance	$	48		$	59		$	48		$	59