Accounting Policies Accounting Policies - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Aug. 31, 2017	Aug. 31, 2017
Accounting Policies [Abstract]
New accounting pronouncement or change in accounting principle, effect of adoption, quantification	$ 0.8	$ 9.4

Represents the quantification of the effect of adopting the new accounting standard or change in accounting principle expected by the entity to have a significant effect on the entity's financial statements.

No definition available.

Name:	us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration