Commitments (Tables)

3 Months Ended

Mar. 31, 2015

Commitments:

Changes in warranty liabilities

Standard Warranty Liability
(Dollars in millions)	2015		2014
Balance at January 1	$	197	$	376
Current period accruals		35		54
Accrual adjustments to reflect actual experience		10		(3)
Charges incurred		(51)		(85)
Balance at March 31	$	192	$	342

Extended Warranty Liability
(Dollars in millions)	2015		2014
Aggregate deferred revenue at January 1	$	536	$	579
Revenue deferred for new extended warranty contracts		45		54
Amortization of deferred revenue		(63)		(73)
Other*		(15)		(11)
Aggregate deferred revenue at March 31	$	503	$	548
Current portion	$	245	$	268
Noncurrent portion		258		280
Aggregate deferred revenue at March 31	$	503	$	548
* Other primarily consists of foreign currency translation adjustments.