Quarterly Results of Operations (Unaudited) - Unaudited Quarterly Results of Operations (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended
Dec. 31, 2016	Jun. 30, 2016
Quarterly Financial Information [Line Items]
Accelerated amortization of deferred financing costs		$ 35.2
Income tax benefit from foreign subsidiaries	$ 1.2
Building [Member]
Quarterly Financial Information [Line Items]
Gain recognized on sale of buildings		$ 12.8

Amount of current and deferred foreign income tax expense (benefit) attributable to income (loss) from continuing operations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(1))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration