Income Taxes	3 Months Ended
Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company's provision for income taxes is based upon an estimated annual tax rate for the year applied to federal, state and foreign income. On a quarterly basis, the annual effective tax rate is adjusted, as appropriate, based upon changed facts and circumstances, if any, as compared to those forecasted at the beginning of the fiscal year and each interim period thereafter. At March 31, 2019, the Company's effective tax rate for the first three months was 34.7%. This rate includes reductions of income tax expenses of $3 million related to restructuring expense and $5 million related to other one-time adjustments. This rate also includes an increase in income tax expense of $22 million due to the U.S. Department of the Treasury's issuance of the final regulations in the first quarter of 2019 related to the calculation of the one-time transition tax. At March 31, 2018, the Company's effective tax rate for the first three months was 28.6%. This rate includes income tax expense of $1 million related to a commercial settlement gain and reductions of income tax expense of $1 million associated with restructuring expense, and merger and acquisition expense. The annual effective tax rates differ from the U.S. statutory rate primarily due to foreign rates which differ from those in the U.S., U.S. taxes on foreign earnings, the realization of certain business tax credits, including foreign tax credits, and favorable permanent differences between book and tax treatment for certain items, including equity in affiliates' earnings.

Income Taxes

The Company's provision for income taxes is based upon an estimated annual tax rate for the year applied to federal, state and foreign income. On a quarterly basis, the annual effective tax rate is adjusted, as appropriate, based upon changed facts and circumstances, if any, as compared to those forecasted at the beginning of the fiscal year and each interim period thereafter.

At March 31, 2019, the Company's effective tax rate for the first three months was 34.7%. This rate includes reductions of income tax expenses of $3 million related to restructuring expense and $5 million related to other one-time adjustments. This rate also includes an increase in income tax expense of $22 million due to the U.S. Department of the Treasury's issuance of the final regulations in the first quarter of 2019 related to the calculation of the one-time transition tax.

At March 31, 2018, the Company's effective tax rate for the first three months was 28.6%. This rate includes income tax expense of $1 million related to a commercial settlement gain and reductions of income tax expense of $1 million associated with restructuring expense, and merger and acquisition expense.

The annual effective tax rates differ from the U.S. statutory rate primarily due to foreign rates which differ from those in the U.S., U.S. taxes on foreign earnings, the realization of certain business tax credits, including foreign tax credits, and favorable permanent differences between book and tax treatment for certain items, including equity in affiliates' earnings.