Face (par) amount of debt instrument at time of issuance.

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

Debt Notes and Debentures (Details) - USD ($)	Sep. 30, 2022	Jun. 30, 2022
SEC Debt Shelf Registration
Debt Instrument [Line Items]
Remaining Debt Securities Authorized by the Board	$ 1,550,000,000
Junior Subordinated Debt
Debt Instrument [Line Items]
Subordinated notes related to financial covenants	$ 500,000,000
Four Point Four Five Percent Due January 15, 2053 \| Corporate Debt Securities
Debt Instrument [Line Items]
Debt issuance, face amount		$ 1,000,000,000
Debt instrument, stated interest rate		4.45%