Debt Facilities - Bridge Term Loan (Detail) - Bridge Loan $ in Millions	1 Months Ended	9 Months Ended
Oct. 31, 2016	Sep. 30, 2015 JPY (¥)	Sep. 30, 2015 USD ($)
Debt Instrument [Line Items]
Maximum borrowing capacity		¥ 47,500,000,000	$ 395.2
Variable rate (percent)	1.75%	0.40%

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant