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Income Taxes
 3 Months Ended
Mar. 31, 2023
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
Effective Tax Rates
Our quarterly provision for income taxes is measured using an annual effective tax rate, adjusted for discrete items within the periods presented.
Our effective tax rates are as follows:
Three Months Ended March 31,
20232022
Effective Tax Rate21.0%25.0%

Our effective tax rate for the three months ended March 31, 2023 is lower than the prior year’s comparable period primarily due to the greater benefit related to share-based compensation partially offset by higher non-U.S. taxes.
Our effective tax rate attributable to continuing operations for the three months ended March 31, 2023 is equal to the statutory U.S. federal tax rate of 21%. The effective tax rate is the result of permanent increases and decreases that net against each other and offset.

Unrecognized Tax Benefits
During the three months ended March 31, 2023, our gross unrecognized tax benefits, excluding interest and penalties, increased by $0.5 million, primarily due to increases in tax positions taken in the current periods, partially offset by reductions as a result of positions taken during prior period. During the three months ended March 31, 2023, the total amount of unrecognized tax benefits that, if recognized, would cause our effective tax rate to increase by $0.8 million . The difference between these amounts relates to (1) offsetting tax effects from other tax jurisdictions, and (2) interest expense, net of deferred taxes.

During the three months ended March 31, 2023, we recognized $0.5 million of interest expense related to unrecognized tax benefits in our Condensed Consolidated Statement of Operations. As of March 31, 2023 and December 31, 2022, the total amount of accrued interest and penalty expense related to unrecognized tax benefits recorded in our Condensed Consolidated Balance Sheets was $5.3 million and $4.8 million, respectively.
During the next twelve months, it is reasonably possible that our unrecognized tax benefits may decrease by $13.4 million due to expiration of statutes of limitations and settlements with tax authorities. However, if the ultimate resolution of income tax examinations results in amounts that differ from this estimate, we will record additional income tax expense or benefit in the period in which such matters are effectively settled.