Product Warranty Liabilities (Tables)

9 Months Ended

Sep. 30, 2019

Guarantees And Product Warranties [Abstract]

Product Warranty Liability Activities

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

	Three months ended September 30,						Nine months ended September 30,
	2019			2018			2019			2018
Beginning balance	$	59		$	65		$	66		$	55
Payments		(7	)		(6	)		(19	)		(25	)
Increase in liability (warranty issued during period)		5			9			16			30
Net adjustments to liability		(3	)		(1	)		(9	)		7
Ending balance	$	54		$	67		$	54		$	67