Shareholders' Equity and Earnings Per Share - Dividends (Details)	Jan. 25, 2018 $ / shares
Series C Preferred Stock
Dividends
Quarterly cash dividends declared to holders of Series C preferred stock (on an as converted basis)	$ 0.11

Aggregate dividends declared during the period for each share of preferred stock outstanding.

No definition available.

Name:	us-gaap_PreferredStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration