Investment Securities (Details 4) $ in Millions	Jun. 30, 2022 USD ($)
Cost
Due within 1 year	$ 1,782
Due after 1 year but within 5 years	2,174
Due after 5 years but within 10 years	31
Due after 10 years	68
Total	4,055
Estimated Fair Value
Due within 1 year	1,780
Due after 1 year but within 5 years	2,144
Due after 5 years but within 10 years	32
Due after 10 years	60
Total	$ 4,016

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