Acquisitions of Businesses-Purchase Price Allocation (Parenthetical) (Detail) - USD ($) $ in Millions		3 Months Ended
May 06, 2017	Jun. 30, 2017
TNT
Business Acquisition [Line Items]
Increase in goodwill related to adjustments in working capital	$ 1.7	$ 0.1

Amount of increase (decrease) of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Name:	us-gaap_GoodwillPeriodIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration