Commitments (Tables)

3 Months Ended

Mar. 31, 2021

Commitments

Changes in warranty liabilities

Standard Warranty Liability

(Dollars in millions)	2021		2020
Balance at January 1	$	83	$	113
Current period accruals		16		20
Accrual adjustments to reflect actual experience		(4)		(6)
Charges incurred		(23)		(26)
Balance at March 31	$	72	$	100

Extended Warranty Liability (Deferred Income)

(Dollars in millions)	2021		2020
Balance at January 1	$	425	$	477
Revenue deferred for new extended warranty contracts		18		40
Amortization of deferred revenue		(53)		(57)
Other*		(6)		(13)
Balance at March 31	$	383	$	447
Current portion	$	199	$	219
Noncurrent portion	$	185	$	228

* Other primarily consists of foreign currency translation adjustments.