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Income Taxes	9 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 3 — INCOME TAXES Our provision for income taxes for the quarters ended September 30, 2019 and 2018 was $215 million and $173 million, respectively, and the effective tax rates were 26.0% and 18.6%, respectively. Our provision for income taxes for the nine months ended September 30, 2019 and 2018 was $765 million and $702 million, respectively, and the effective tax rates were 23.9% and 20.5%, respectively. Our provision for income taxes included tax benefits related to the settlement of employee equity awards of $3 million and $23 million for the quarters ended September 30, 2019 and 2018, respectively, and $56 million and $119 million for the nine months ended September 30, 2019 and 2018, respectively. We also recorded a reduction to the provision for income taxes of $28 million during the quarter ended September 30, 2018 for tax credits related to certain 2017 hurricane-related expenses. Our liability for unrecognized tax benefits was $540 million, including accrued interest of $56 million, as of September 30, 2019 ($435 million and $48 million, respectively, as of December 31, 2018). Unrecognized tax benefits of $147 million ($137 million as of December 31, 2018) would affect the effective rate, if recognized. The Internal Revenue Service began an examination of the Company’s 2016 and 2017 federal income tax returns during 2019. We are also subject to examination by state and foreign taxing authorities. Depending on the resolution of any federal, state and foreign tax disputes, the completion of examinations by federal, state or foreign taxing authorities, or the expiration of statutes of limitation for specific taxing jurisdictions, we believe it is reasonably possible that our liability for unrecognized tax benefits may significantly increase or decrease within the next 12 months. However, we are currently unable to estimate the range of any possible change.

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- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-URI http://asc.fasb.org/topic&trid=2144680

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