Segment Information - Additional Information (Detail) - Segment	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Sales Information [Line Items]
Number of reportable segments	4
Walmart Inc. and Subsidiaries [Member] \| Revenue from Contract with Customer [Member] \| Customer Concentration Risk [Member]
Sales Information [Line Items]
Percentage of sales by major customer	13.50%	13.70%	13.50%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
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-Section 50
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