Commitments (Tables)

3 Months Ended

Mar. 31, 2016

Commitments:

Changes in warranty liabilities

Standard Warranty Liability
(Dollars in millions)	2016		2015
Balance at January 1	$	181	$	197
Current period accruals		27		35
Accrual adjustments to reflect actual experience		(2)		10
Charges incurred		(41)		(51)
Balance at March 31	$	164	$	192

Extended Warranty Liability
(Dollars in millions)	2016		2015
Aggregate deferred revenue at January 1	$	538	$	536
Revenue deferred for new extended warranty contracts		49		45
Amortization of deferred revenue		(66)		(63)
Other*		9		(15)
Aggregate deferred revenue at March 31	$	531	$	503
Current portion	$	247	$	245
Noncurrent portion	$	284	$	258
* Other primarily consists of foreign currency translation adjustments.