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Commitments (Tables)
 6 Months Ended
Jun. 30, 2016
Commitments:  
Changes in warranty liabilities

Standard Warranty Liability

(Dollars in millions)

 

2016

 

2015

 

Balance at January 1

 

$
181

 

$
197

 

Current period accruals

 
74

 
82

 

Accrual adjustments to reflect actual experience

 
3

 
9

 

Charges incurred

 
(89

)
(100

)

 

 

 

 

 

 

Balance at June 30

 

$
169

 

$
188

 

 

 

 

 

 

 

 

 

 

Extended Warranty Liability

(Dollars in millions)

 

2016

 

2015

 

Aggregate deferred revenue at January 1

 

$
538

 

$
536

 

Revenue deferred for new extended warranty contracts

 
122

 
122

 

Amortization of deferred revenue

 
(134

)
(126

)

Other*

 
9

 
(20

)

 

 

 

 

 

 

Aggregate deferred revenue at June 30

 

$
535

 

$
512

 

 

 

 

 

 

 

 

 

Current portion

 

$
241

 

$
245

 

Noncurrent portion

 

$
294

 

$
267

 

 

* Other primarily consists of foreign currency translation adjustments.