Earnings Per Share - Additional Information (Detail)	Sep. 28, 2017 shares
Earnings Per Share [Abstract]
Weighted average number of shares outstanding prior to conversion	0

Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

No definition available.

Name:	us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration