Commitments: (Tables)

6 Months Ended

Jun. 30, 2012

Commitments:

Changes in warranty liabilities

Standard Warranty Liability

(Dollars in millions)	2012			2011
Balance at January 1	$	407		$	375
Current period accruals	181			203
Accrual adjustments to reflect actual experience	(9		)	18
Charges incurred	(199		)	(215		)
Balance at June 30	$	380		$	381

Extended Warranty Liability

(Dollars in millions)	2012			2011
Aggregate deferred revenue at January 1	$	636		$	670
Revenue deferred for new extended warranty contracts	127			141
Amortization of deferred revenue	(154		)	(164		)
Other*	(6		)	2
Aggregate deferred revenue at June 30	$	602		$	649
Current portion	$	288		$	309
Noncurrent portion	314			340
Aggregate deferred revenue at June 30	$	602		$	649

* Other primarily consists of foreign currency translation adjustments.