XML 32 R95.htm IDEA: XBRL DOCUMENT v3.20.1
Acquisition of Business (Details) - USD ($)
$ in Millions
Jul. 03, 2019
Apr. 30, 2020
Apr. 30, 2019
Apr. 30, 2018
Business Acquisition [Line Items]        
Business Acquisition, Percentage of Voting Interests Acquired 100.00%      
Goodwill   $ 756 $ 753 $ 763
The 86 Company [Member]        
Business Acquisition [Line Items]        
Payments to Acquire Businesses, Gross $ 22      
Goodwill 11      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets 12      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities $ 1