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Income Taxes
 3 Months Ended
Mar. 31, 2022
Income Tax Disclosure [Abstract]  
Income Taxes

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13.  Income Taxes

For the three months ended March 31, 2022, we recorded an income tax expense of $98 million on pre-tax income of $983 million compared to an income tax expense of $17 million on pre-tax income of $616 million for the three months ended March 31, 2021. Our effective income tax rate was 10.0% and 2.8% for the three months ended March 31, 2022 and 2021, respectively.

For the three months ended March 31, 2022, the effective tax rate was lower than the statutory federal rate of 21%, for corporations, primarily due to partnership income for which there was no tax expense, as such income is allocated to the partners.

For the three months ended March 31, 2021, the effective tax rate was lower than the statutory federal rate of 21%, for corporations, primarily due to partnership income for which there was no tax expense, as such income is allocated to the partners.