Amount of liability for consideration received or receivable from customer which is not included in transaction price, when consideration is expected to be refunded to customer.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 55
-Paragraph 27
-URI http://asc.fasb.org/extlink&oid=118944142&loc=SL49130611-203046-203046

Name:	us-gaap_ContractWithCustomerRefundLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Subsequent Events (Details) - Subsequent Event - USD ($) $ in Millions	Jun. 30, 2020	May 06, 2020	May 05, 2020
Subsequent Event [Line Items]
Value of additional shares authorized to be repurchased		$ 200
Remaining authorized repurchase amount		$ 333	$ 133
Forecast
Subsequent Event [Line Items]
Premium credit liability	$ 100