Accelerated Share Repurchase Programs (Details) shares in Millions, $ in Millions	Jun. 30, 2019 USD ($) shares
Equity [Abstract]
Accelerated Share Repurchases, Settlement (Payment) or Receipt \| $	$ 400.0
Stock Repurchase Program, Number of Shares Authorized to be Repurchased \| shares	12.0

Amount of cash receipt from (payment to) bank; or stock received from (issuance to) bank in the settlement of the accelerated share repurchase agreement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 25
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6405686&loc=d3e22802-112653

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