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Income Taxes
 6 Months Ended
Jun. 30, 2022
Income Tax Disclosure [Abstract]  
Income Tax Disclosure
Income Taxes
The effective income tax rate was 15.7% and 6.6% for the quarters ended 2022 and 2021, respectively, and 22.3% and 13.2% for the six months ended 2022 and 2021, respectively. The effective tax rate for both periods of 2022 reflected tax audit settlements and the remeasurement of income tax reserves associated with global tax audit progression, as well as the sale of Dynamic Yield and the Company's business in Russia. The effective tax rate for both periods of 2021 included a benefit related to the remeasurement of deferred taxes as a result of a change in the U.K. statutory income tax rate.
As of June 30, 2022 and December 31, 2021, the Company’s gross unrecognized tax benefits totaled $640.0 million and $1,504.9 million, respectively. The Company continues to engage with various tax jurisdictions to resolve tax audits. In the quarter, the Company finalized and settled certain tax examinations and remeasured other income tax reserves based on audit progression. The following table presents a reconciliation of the beginning and ending amounts of unrecognized tax benefits:

In millions2022
Balance at January 1$1,504.9 
Decreases for positions taken in prior years(572.1)
Increases for positions taken in prior years49.8 
Increases for positions in the current year19.4 
Decreases due to settlements with taxing authorities(362.0)
Decreases due to the lapsing of statutes of limitations— 
Balance at June 30$640.0