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Summary of Significant Accounting Policies - Investments (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Accrued interest, net of allowance for credit losses	$ 28	$ 12

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- Definition

Debt Securities, Available-for-sale, Accrued Interest Net Of Credit Loss

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

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- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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