Earnings Per Share and Stock Issuances - Additional Information (Details) $ in Millions	Feb. 28, 2019 USD ($)
Class of Stock [Line Items]
Stock repurchase program, remaining authorized repurchase amount	$ 96.4
Stock repurchase program, authorized amount	$ 600.0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_ClassOfStockLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration