Fair Value Measurements - Cash, Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Abstract]
Available-for-sale Securities - Estimated Fair Value	$ 9,346	$ 8,874
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]
Cash and Cash Equivalents	25,473	21,859
Marketable securities	745	$ 1,068
Total cash, cash equivalents and current marketable securities, Carrying Amount	26,216
Total cash, cash equivalents and current marketable securities, Unrealized Gain	2
Total cash, cash equivalents and current marketable securities, Estimated Fair Value	26,218
Held-to-maturity Securities
Debt Securities, Held-to-maturity [Abstract]
Held-to-maturity Securities - Carrying Amount	16,872
Held-to-maturity Securities, Unrecognized Gain	0
Held-to-maturity Securities - Estimated Fair Value	16,872
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]
Cash and Cash Equivalents	16,758
Marketable securities	114
Held-to-maturity Securities | Cash
Debt Securities, Held-to-maturity [Abstract]
Held-to-maturity Securities - Carrying Amount	3,410
Held-to-maturity Securities, Unrecognized Gain	0
Held-to-maturity Securities - Estimated Fair Value	3,410
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]
Cash and Cash Equivalents	3,410
Marketable securities	0
Held-to-maturity Securities | U.S. Gov't securities
Debt Securities, Held-to-maturity [Abstract]
Held-to-maturity Securities - Carrying Amount	96
Held-to-maturity Securities, Unrecognized Gain	0
Held-to-maturity Securities - Estimated Fair Value	96
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]
Cash and Cash Equivalents	96
Marketable securities	0
Held-to-maturity Securities | Non-U.S. sovereign securities
Debt Securities, Held-to-maturity [Abstract]
Held-to-maturity Securities - Carrying Amount	324
Held-to-maturity Securities, Unrecognized Gain	0
Held-to-maturity Securities - Estimated Fair Value	324
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]
Cash and Cash Equivalents	324
Marketable securities	0
Held-to-maturity Securities | U.S. reverse repurchase agreements
Debt Securities, Held-to-maturity [Abstract]
Held-to-maturity Securities - Carrying Amount	7,892
Held-to-maturity Securities, Unrecognized Gain	0
Held-to-maturity Securities - Estimated Fair Value	7,892
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]
Cash and Cash Equivalents	7,892
Marketable securities	0
Held-to-maturity Securities | Corporate debt securities(1)
Debt Securities, Held-to-maturity [Abstract]
Held-to-maturity Securities - Carrying Amount	702
Held-to-maturity Securities, Unrecognized Gain	0
Held-to-maturity Securities - Estimated Fair Value	702
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]
Cash and Cash Equivalents	588
Marketable securities	114
Held-to-maturity Securities | Money market funds
Debt Securities, Held-to-maturity [Abstract]
Held-to-maturity Securities - Carrying Amount	3,822
Held-to-maturity Securities, Unrecognized Gain	0
Held-to-maturity Securities - Estimated Fair Value	3,822
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]
Cash and Cash Equivalents	3,822
Marketable securities	0
Held-to-maturity Securities | Time deposits(1)
Debt Securities, Held-to-maturity [Abstract]
Held-to-maturity Securities - Carrying Amount	626
Held-to-maturity Securities, Unrecognized Gain	0
Held-to-maturity Securities - Estimated Fair Value	626
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]
Cash and Cash Equivalents	626
Marketable securities	0
Available-for-sale Securities
Debt Securities, Available-for-sale [Abstract]
Available-for-sale Securities - Carrying Amount	9,344
Available-for-sale Securities, Unrecognized Gain	2
Available-for-sale Securities - Estimated Fair Value	9,346
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]
Cash and Cash Equivalents	8,715
Marketable securities	631
Available-for-sale Securities | U.S. Gov’t securities
Debt Securities, Available-for-sale [Abstract]
Available-for-sale Securities - Carrying Amount	9,064
Available-for-sale Securities - Estimated Fair Value	9,064
Available-for-sale Securities | U.S. Gov’t Agencies
Debt Securities, Available-for-sale [Abstract]
Available-for-sale Securities - Carrying Amount	41
Available-for-sale Securities - Estimated Fair Value	43
Available-for-sale Securities | Non-U.S. sovereign securities
Debt Securities, Available-for-sale [Abstract]
Available-for-sale Securities - Carrying Amount	2
Available-for-sale Securities - Estimated Fair Value	2
Available-for-sale Securities | Corporate debt securities(1)
Debt Securities, Available-for-sale [Abstract]
Available-for-sale Securities - Carrying Amount	237
Available-for-sale Securities - Estimated Fair Value	237
Available-for-sale Securities | Non-U.S. sovereign securities
Debt Securities, Available-for-sale [Abstract]
Available-for-sale Securities, Unrecognized Gain	0
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]
Cash and Cash Equivalents	0
Marketable securities	2
Available-for-sale Securities | Corporate debt securities(1)
Debt Securities, Available-for-sale [Abstract]
Available-for-sale Securities, Unrecognized Gain	0
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]
Cash and Cash Equivalents	50
Marketable securities	187
Available-for-sale Securities | U.S. Gov’t securities
Debt Securities, Available-for-sale [Abstract]
Available-for-sale Securities, Unrecognized Gain	0
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]
Cash and Cash Equivalents	8,665
Marketable securities	399
Available-for-sale Securities | U.S. Gov’t Agencies
Debt Securities, Available-for-sale [Abstract]
Available-for-sale Securities, Unrecognized Gain	2
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]
Cash and Cash Equivalents	0
Marketable securities	$ 43