Supplemental Financial Information - Additional Information (Detail) - ERP Software $ / shares in Units, $ in Millions	3 Months Ended
Mar. 31, 2018 USD ($) $ / shares
Property Plant And Equipment [Line Items]
Estimated useful life	2020
Reduction of depreciation expense	$ 6
Increase in net income	$ 4
Incraese in diluted share \| $ / shares	$ 0.01
Maximum
Property Plant And Equipment [Line Items]
Estimated useful life	2028

Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 35
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=68071081&loc=d3e1205-110223

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration