Financial Instruments - Contractual Maturities (Details) $ in Millions	Dec. 31, 2023 USD ($)
Amortized Cost
Due within one year	$ 65,224
Due after one year through five years	4,635
Due after five years through ten years	411
Due after ten years	995
Total	71,265
Estimated Fair Value
Due within one year	65,159
Due after one year through five years	4,430
Due after five years through ten years	394
Due after ten years	936
Total	$ 70,919