Subsequent Events (Details) - Subsequent Event - Senior notes $ in Millions	Feb. 07, 2022 USD ($)
Fixed-to-floating Rate Senor Notes Due 2026
Subsequent Event [Line Items]
Aggregate principal amount	$ 300
Fixed-to-floating Rate Senor Notes Due 2028
Subsequent Event [Line Items]
Aggregate principal amount	650
Fixed-to-floating Rate Senor Notes Due 2033
Subsequent Event [Line Items]
Aggregate principal amount	$ 550

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

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