Investments - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Schedule of Available for Sale Securities
Short-term investments	$ 4,030	$ 4,009
Accrued investment income	389	339
Fixed income securities
Schedule of Available for Sale Securities
Accrued investment income	$ 359	$ 311

Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.

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