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Other Liabilities
 3 Months Ended 12 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Other Liabilities Disclosure [Abstract]    
Other Liabilities Other Liabilities
A summary of significant other liabilities by balance sheet caption follows:
(Dollars in millions)March 31, 2022December 31, 2021
Salaries, wages and accrued bonuses$54 $70 
Fringe benefits69 74 
Litigation10 10 
Restructuring costs3 4 
Provision for contract losses58 48 
Operating lease liabilities26 24 
Other(1)
55 65 
Total other current liabilities
$275 $295 
Operating lease liabilities$63 $73 
Other
2 1 
Total other noncurrent liabilities
$65 $74 
__________________
(1)Consists primarily of taxes payable, environmental remediation reserves and warranty reserves. See Note 15: Commitments and Contingencies for more information regarding the warranty provision.
 Other Liabilities
A summary of significant other liabilities by balance sheet caption follows:
December 31,
(Dollars in millions)20212020
Salaries, wages and accrued bonuses$70 $61 
Fringe benefits74 71 
Litigation10 10 
Restructuring costs4 1 
Provision for contract losses48 44 
Operating lease liabilities24 22 
Other(1)
65 58 
Total other current liabilities
$295 $267 
Retirement benefits$— $— 
Operating lease liabilities$73 $81 
Other(2)
1 11 
Total other noncurrent liabilities
$74 $92 
__________________
(1)Consists primarily of taxes payable, environmental remediation reserves and warranty reserves. See Note 15: Commitments and Contingencies for more information regarding the warranty provision.
(2)Consists primarily of workers’ compensation liabilities and certain payroll taxes deferred under the CARES Act.