Financial Instruments - Contractual Maturities (Details) $ in Millions	Sep. 30, 2022 USD ($)
Amortized Cost
Due within one year	$ 26,797
Due after one year through five years	13,757
Due after five years through ten years	772
Due after ten years	2,023
Amortized cost	43,349
Estimated Fair Value
Due within one year	26,738
Due after one year through five years	12,807
Due after five years through ten years	728
Due after ten years	1,893
Estimated fair value	$ 42,166