Income Taxes	9 Months Ended
	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income tax expense is provided on an interim basis based upon our estimate of the annual effective income tax rate, adjusted each quarter for discrete items. For the three months ended September 30, 2021 and 2020, our effective tax rate was 20.9% and 20.1%, respectively, and for the nine months ended September 30, 2021 and 2020, our effective tax rate was 20.8% and 20.6%, respectively.