Commitments: (Tables)

9 Months Ended

Sep. 30, 2014

Commitments:

Changes in warranty liabilities

Standard Warranty Liability
(Dollars in millions)	2014		2013
Balance at January 1	$	376	$	394
Current period accruals		186		238
Accrual adjustments to reflect actual experience		6		21
Charges incurred		(252)		(292)
Balance at September 30	$	316	$	362

Extended Warranty Liability
(Dollars in millions)	2014		2013
Aggregate deferred revenue at January 1	$	579	$	606
Revenue deferred for new extended warranty contracts		195		204
Amortization of deferred revenue		(214)		(244)
Other*		(21)		(7)
Aggregate deferred revenue at September 30	$	539	$	559
Current portion	$	257	$	283
Noncurrent portion		282		276
Aggregate deferred revenue at September 30	$	539	$	559
* Other primarily consists of foreign currency translation adjustments.