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Commitments (Tables)
9 Months Ended
Sep. 30, 2021
Commitments  
Changes in warranty liabilities

Standard Warranty Liability

(Dollars in millions)

    

2021

    

2020

Balance at January 1

$

83

$

113

Current period accruals

 

50

 

56

Accrual adjustments to reflect actual experience

 

(2)

 

(15)

Charges incurred

 

(66)

 

(73)

Balance at September 30

$

66

$

80

Extended Warranty Liability

(Dollars in millions)

    

2021

    

2020

Balance at January 1

$

425

$

477

Revenue deferred for new extended warranty contracts

 

71

 

115

Amortization of deferred revenue

 

(154)

 

(169)

Other*

 

(9)

 

(3)

Balance at September 30

$

334

$

419

Current portion

$

171

$

196

Noncurrent portion

$

163

$

223

* Other primarily consists of foreign currency translation adjustments.