Commitments (Tables)

6 Months Ended

Jun. 30, 2019

Commitments

Changes in warranty liabilities

Standard Warranty Liability

(Dollars in millions)	2019			2018
Balance at January 1	$	118		$	152
Accruals recorded in first quarter		19	*		25
Accrual adjustments to reflect actual experience		(1)	*		(14)
Charges incurred in first quarter		(29)	*		(32)
Balance at March 31		107			130
Current period accruals		26			37
Accrual adjustments to reflect actual experience		0			(9)
Charges incurred in current period		(30)			(31)
Balance at June 30	$	103		$	126

* Revised grossed-up amounts to conform to current presentation.

Extended Warranty Liability

(Dollars in millions)	2019		2018
Aggregate deferred revenue at January 1	$	533	$	566
Revenue deferred for new extended warranty contracts		81		111
Amortization of deferred revenue		(128)		(134)
Other*		0		(9)
Aggregate deferred revenue at June 30	$	486	$	534
Current portion	$	225	$	254
Noncurrent portion	$	260	$	280

* Other primarily consists of foreign currency translation adjustments.