Investments and Restricted Cash and Cash Equivalents - EGTS - Components (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Investments And Restricted Cash And Investments [Line Items]
Total investments and restricted cash and cash equivalents	$ 13,629	$ 15,960
Reflected as:
Current assets	914	172
Noncurrent assets	12,715	15,788
EGTS
Investments And Restricted Cash And Investments [Line Items]
Investments	13	13
Restricted cash and cash equivalents	28	15
Total investments and restricted cash and cash equivalents	41	28
Reflected as:
Current assets	28	15
Noncurrent assets	13	13
Customer deposits \| EGTS
Investments And Restricted Cash And Investments [Line Items]
Restricted cash and cash equivalents	28	15
Investment funds \| EGTS
Investments And Restricted Cash And Investments [Line Items]
Investments	$ 13	$ 13

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