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Income Tax
3 Months Ended
Mar. 31, 2019
Income Tax Disclosure [Abstract]  
Income Tax
12. Income Tax
The Company’s effective tax rates differ from the U.S. statutory rate typically due to non-taxable investment income, tax credits and foreign earnings taxed at different rates than the U.S. statutory rate. For the three months ended March 31, 2019, the Company’s provision for income tax expense (benefit) includes benefits of $9 million related to the effect of sequestration on the alternative minimum tax credit and $8 million related to the corporate tax deduction for stock compensation. For the three months ended March 31, 2018, the Company’s provision for income tax expense (benefit) includes a tax charge of $17 million related to a tax adjustment in Chile and a $5 million tax charge in Colombia to establish a deferred tax liability due to a change in tax status.