Deferred Revenue and Financing Receivables (Details) - USD ($) $ in Millions	Jul. 01, 2017	Sep. 30, 2016
Other Assets
Deferred Revenue and Financing Receivables [Line Items]
Billed but uncollected support and subscription related receivable	$ 131.1	$ 126.3

Amount, after allowance, receivable from customers, clients, or other third-parties, and receivables classified as other due within one year or the normal operating cycle, if longer.

No definition available.

Name:	us-gaap_AccountsAndOtherReceivablesNetCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant