Cash, Cash Equivalents, and Marketable Securities (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash, Cash Equivalents, and Short-term Investments	$ 7,501	$ 8,207
Total cash and cash equivalents	10,651	10,393
Restricted Cash	124	127
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	10,775	10,520	$ 6,453	$ 11,091
Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash and cash equivalents	3,150	2,186
Fair Value, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Marketable securities	1,464	1,493
US Government [Member] | Fair Value, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash and cash equivalents	2,111	1,045
Marketable securities	274	187
US Government Agencies [Member] | Fair Value, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash and cash equivalents	100	150
Marketable securities	223	221
Debt Security, Government, Non-US [Member] | Fair Value, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash and cash equivalents	280	199
Marketable securities	549	658
Corporate debt [Member] | Fair Value, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash and cash equivalents	659	792
Marketable securities	269	266
Other Debt Obligations [Member] | Fair Value, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Marketable securities	$ 149	$ 161