Commitments: (Tables)

9 Months Ended

Sep. 30, 2012

Commitments:

Changes in warranty liabilities

Standard Warranty Liability

(Dollars in millions)	2012			2011
Balance at January 1	$	407		$	375
Current period accruals	270			309
Accrual adjustments to reflect actual experience	(18		)	15
Charges incurred	(295		)	(318		)
Balance at September 30	$	364		$	382

Extended Warranty Liability

(Dollars in millions)	2012			2011
Aggregate deferred revenue at January 1	$	636		$	670
Revenue deferred for new extended warranty contracts	191			225
Amortization of deferred revenue	(240		)	(256		)
Other*	0			(18		)
Aggregate deferred revenue at September 30	$	587		$	621
Current portion	$	284		$	305
Noncurrent portion	302			316
Aggregate deferred revenue at September 30	$	587		$	621

* Other primarily consists of foreign currency translation adjustments.