Capital Stock - Narrative (Details) - Subsequent Event	1 Months Ended
Jul. 31, 2019 shares
Subsequent Event [Line Items]
Increase in number of repurchases authorized	25,000,000.0
Total repurchases authorized	31,500,000

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

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