"Amount of tax expense (benefit) related to a gain (loss) on disposal.

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Effective Tax Rate Net Tax Benefits

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Estimated Annual Effective Tax Rate From Continuing Operations

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Income tax reconciliation, tax settlements and expiration of statute of limitations.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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Gain (loss) from sale or disposal of an organization or integrated set of activities (for example, but not limited to, a partnership or corporation) engaged in providing a product or service in a commercial, industrial, or professional environment.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates.

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Amount of the difference between reported income tax expense (benefit) and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deduction for qualified production activity.

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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Income Tax Contingency [Line Items]
Estimated effective tax rate			25.80%	13.60%	20.80%
Effective tax rate	23.40%	7.20%	21.30%
Gains on business transactions and divestitures	$ 187		$ 184
Net favorable tax audit settlements and expirations of statutes of limitations		$ 35	74	$ 73
Benefit relating to the U.S. domestic production activities deduction			$ 16
Total unfavorable discrete items		60		109
Australian Grocery Business
Income Tax Contingency [Line Items]
Tax expense on gains from divestitures	27
Gains on business transactions and divestitures	$ 187
U.K
Income Tax Contingency [Line Items]
Benefit from reduction of net deferred tax liabilities in tax legislation enacted		$ 17		$ 17