Commitments: (Tables)

6 Months Ended

Jun. 30, 2014

Commitments:

Changes in warranty liabilities

Standard Warranty Liability
(Dollars in millions)	2014		2013
Balance at January 1	$	376	$	394
Current period accruals		122		163
Accrual adjustments to reflect actual experience		8		11
Charges incurred		(172)		(192)
Balance at June 30	$	334	$	376

Extended Warranty Liability
(Dollars in millions)	2014		2013
Aggregate deferred revenue at January 1	$	579	$	606
Revenue deferred for new extended warranty contracts		132		119
Amortization of deferred revenue		(145)		(148)
Other*		(8)		(11)
Aggregate deferred revenue at June 30	$	558	$	567
Current portion	$	266	$	271
Noncurrent portion		292		296
Aggregate deferred revenue at June 30	$	558	$	567
* Other primarily consists of foreign currency translation adjustments.