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INCOME TAXES (Tables)
9 Months Ended
Sep. 30, 2021
Income Tax Disclosure [Abstract]  
Schedule of Effective Income Tax Rate Reconciliation
The reconciliations of income tax expense with federal income taxes at the statutory rate are as follows (in millions of dollars):
 Three Months Ended September 30,Nine Months Ended September 30,
 2021202020212020
Federal income tax $89 $89 $228 $171 
States income taxes, net of federal income tax benefit12 12 29 23 
Foreign rate difference10 19 17 
Net tax benefit related to foreign subsidiaries— (4)— (92)
Other - net(1)(1)(5)(1)
Income tax provision$107 $106 $271 $118 
Effective tax rate25.5 %29.3 %25.0 %17.3 %