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Commitments (Tables)
6 Months Ended
Jun. 30, 2021
Commitments  
Changes in warranty liabilities

Standard Warranty Liability

(Dollars in millions)

    

2021

    

2020

Balance at January 1

$

83

$

113

Current period accruals

 

36

 

43

Accrual adjustments to reflect actual experience

 

(2)

 

(14)

Charges incurred

 

(45)

 

(49)

Balance at June 30

$

73

$

93

Extended Warranty Liability

(Dollars in millions)

    

2021

    

2020

Balance at January 1

$

425

$

477

Revenue deferred for new extended warranty contracts

 

50

 

93

Amortization of deferred revenue

 

(104)

 

(115)

Other*

 

(5)

 

(9)

Balance at June 30

$

367

$

445

Current portion

$

184

$

216

Noncurrent portion

$

183

$

228

* Other primarily consists of foreign currency translation adjustments.