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INCOME TAXES
 6 Months Ended
Jun. 30, 2021
Income Tax Disclosure [Abstract]  
INCOME TAXES INCOME TAXES
The reconciliations of income tax expense with federal income taxes at the statutory rate are as follows (in millions of dollars):
 Three Months Ended June 30,Six Months Ended June 30,
 2021202020212020
Federal income tax $67 $47 $139 $82 
States income taxes, net of federal income tax benefit8 7 18 11 
Stock compensation (6)— (7)(2)
Foreign rate difference6 4 13 7 
Net tax benefit related to foreign subsidiaries— (3)— (88)
Other, net1 — 1 2 
Income tax provision$76 $55 $164 $12 
Effective tax rate23.6 %30.2 %24.7 %3.9 %

The changes to the Company's effective tax rate for the six months ended June 30, 2021 were primarily driven by the absence of the prior year net tax benefit from the Company's investment in Fabory. The Company divested the Fabory business during the second quarter of 2020.