Commitments: (Tables)

3 Months Ended

Mar. 31, 2014

Commitments:

Changes in warranty liabilities

Standard Warranty Liability
(Dollars in millions)	2014		2013
Balance at January 1	$	376	$	394
Current period accruals		54		71
Accrual adjustments to reflect actual experience		(3)		9
Charges incurred		(85)		(93)
Balance at March 31	$	342	$	381

Extended Warranty Liability
(Dollars in millions)	2014		2013
Aggregate deferred revenue at January 1	$	579	$	606
Revenue deferred for new extended warranty contracts		54		47
Amortization of deferred revenue		(73)		(82)
Other*		(11)		(7)
Aggregate deferred revenue at March 31	$	548	$	565
Current portion	$	268	$	286
Noncurrent portion		280		278
Aggregate deferred revenue at March 31	$	548	$	565
* Other primarily consists of foreign currency translation adjustments.