Additional Financial Information - Schedule of Cash and Cash Equivalents, Including Restricted Cash and Cash Held for Sale (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Supplemental Financial Statement Elements [Abstract]
Cash and cash equivalents	$ 5,030	$ 4,507
Cash and cash equivalents held for sale (included in Other current assets)	0	27
Restricted cash (included in Other current assets)	94	73
Restricted cash (included in Other assets)	75	67
Cash and cash equivalents, including restricted cash and cash held for sale	$ 5,199	$ 4,674