Financial Instruments and Fair Value - Estimated Fair Value of Financial Instruments (Details) - Level 2 - USD ($) $ in Millions	Jun. 30, 2021	Jun. 30, 2020
Prepayments and other current assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other financial instruments in asset positions	$ 29	$ 1
Accrued expenses and other current liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other financial instruments in liability positions	$ 3	$ 0

Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities.

No definition available.

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