Investments and Restricted Cash and Cash Equivalents and Investments - EGTS - Components (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Reflected as:
Other current assets	$ 3,484	$ 2,141
EGTS
Investments And Restricted Cash And Investments [Line Items]
Restricted cash and cash equivalents	28	29
Total investments and restricted cash and cash equivalents	46	43
Reflected as:
Other current assets	28	29
Noncurrent assets	18	14
Customer deposits | EGTS
Investments And Restricted Cash And Investments [Line Items]
Restricted cash and cash equivalents	28	29
Investment funds | EGTS
Investments And Restricted Cash And Investments [Line Items]
Investments	$ 18	$ 14