Short-term Investments (Components of Investments) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized cost of available-for-sale debt securities	$ 7,481	$ 6,304
Unrealized gains, available-for-sale debt securities	1	0
Unrealized losses, available-for-sale debt securities	(2)	(1)
Fair value of available-for-sale debt securities	7,480	6,303
Cash	3,972	5,467
Short-term investments and cash	11,452	11,770
Commercial Paper [Member] \| Level 2
Debt Securities, Available-for-sale [Line Items]
Amortized cost of available-for-sale debt securities	2,765	3,074
Unrealized gains, available-for-sale debt securities	0	0
Unrealized losses, available-for-sale debt securities	(2)	(1)
Fair value of available-for-sale debt securities	2,763	3,073
Certificates of deposit and time deposits \| Level 2
Debt Securities, Available-for-sale [Line Items]
Amortized cost of available-for-sale debt securities	3,190	2,093
Unrealized gains, available-for-sale debt securities	0	0
Unrealized losses, available-for-sale debt securities	0	0
Fair value of available-for-sale debt securities	3,190	2,093
U.S. government securities \| Level 1
Debt Securities, Available-for-sale [Line Items]
Amortized cost of available-for-sale debt securities	1,487	1,071
Unrealized gains, available-for-sale debt securities	1	0
Unrealized losses, available-for-sale debt securities	0	0
Fair value of available-for-sale debt securities	1,488	1,071
Corporate notes and bonds \| Level 2
Debt Securities, Available-for-sale [Line Items]
Amortized cost of available-for-sale debt securities	39	66
Unrealized gains, available-for-sale debt securities	0	0
Unrealized losses, available-for-sale debt securities	0	0
Fair value of available-for-sale debt securities	39	66
Cash and Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Fair value of available-for-sale debt securities	3,988	3,158
Cash	3,972	5,467
Short-term investments and cash	7,960	8,625
Cash and Cash Equivalents \| Commercial Paper [Member] \| Level 2
Debt Securities, Available-for-sale [Line Items]
Fair value of available-for-sale debt securities	538	1,106
Cash and Cash Equivalents \| Certificates of deposit and time deposits \| Level 2
Debt Securities, Available-for-sale [Line Items]
Fair value of available-for-sale debt securities	2,600	1,500
Cash and Cash Equivalents \| U.S. government securities \| Level 1
Debt Securities, Available-for-sale [Line Items]
Fair value of available-for-sale debt securities	850	498
Cash and Cash Equivalents \| Corporate notes and bonds \| Level 2
Debt Securities, Available-for-sale [Line Items]
Fair value of available-for-sale debt securities	0	54
Short-term Investments
Debt Securities, Available-for-sale [Line Items]
Fair value of available-for-sale debt securities	3,492	3,145
Cash	0	0
Short-term investments and cash	3,492	3,145
Short-term Investments \| Commercial Paper [Member] \| Level 2
Debt Securities, Available-for-sale [Line Items]
Fair value of available-for-sale debt securities	2,225	1,967
Short-term Investments \| Certificates of deposit and time deposits \| Level 2
Debt Securities, Available-for-sale [Line Items]
Fair value of available-for-sale debt securities	590	593
Short-term Investments \| U.S. government securities \| Level 1
Debt Securities, Available-for-sale [Line Items]
Fair value of available-for-sale debt securities	638	573
Short-term Investments \| Corporate notes and bonds \| Level 2
Debt Securities, Available-for-sale [Line Items]
Fair value of available-for-sale debt securities	$ 39	$ 12

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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