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Marketable and Other Securities - Fair Value of Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Marketable Securities [Line Items]
Total available-for-sale debt securities with contractual maturities	$ 14,862
Total cash and cash equivalents	20,745	$ 20,067
Cash and cash equivalents	296	466
Total restricted cash	2,755	3,475
Due in one year or less	10,152
Due between one and five years	4,709
Total available-for-sale debt securities with contractual maturities	14,862
Cruise
Marketable Securities [Line Items]
Total cash and cash equivalents	1,700	1,600
Cash and cash equivalents
Marketable Securities [Line Items]
Cash and time deposits	9,315	7,881
Total available-for-sale debt securities with contractual maturities	5,931	8,148
Total available-for-sale debt securities with contractual maturities	5,931	8,148
Cash and cash equivalents | Level 1
Marketable Securities [Line Items]
Money market funds	5,499	4,038
Marketable debt securities
Marketable Securities [Line Items]
Total available-for-sale debt securities with contractual maturities	9,566	8,609
Total available-for-sale debt securities with contractual maturities	9,566	8,609
Marketable debt securities | Cruise
Marketable Securities [Line Items]
Total available-for-sale debt securities with contractual maturities	1,600	1,500
Total available-for-sale debt securities with contractual maturities	1,600	1,500
Other current assets | Level 1
Marketable Securities [Line Items]
Money market funds	2,458	3,009
U.S. government and agencies | Cash and cash equivalents | Level 2
Marketable Securities [Line Items]
Total available-for-sale debt securities with contractual maturities	788	722
Total available-for-sale debt securities with contractual maturities	788	722
U.S. government and agencies | Marketable debt securities | Level 2
Marketable Securities [Line Items]
Total available-for-sale debt securities with contractual maturities	2,856	2,071
Total available-for-sale debt securities with contractual maturities	2,856	2,071
Corporate debt | Cash and cash equivalents | Level 2
Marketable Securities [Line Items]
Total available-for-sale debt securities with contractual maturities	3,974	5,321
Total available-for-sale debt securities with contractual maturities	3,974	5,321
Corporate debt | Marketable debt securities | Level 2
Marketable Securities [Line Items]
Total available-for-sale debt securities with contractual maturities	3,646	3,396
Total available-for-sale debt securities with contractual maturities	3,646	3,396
Mortgage and asset-backed | Marketable debt securities | Level 2
Marketable Securities [Line Items]
Total available-for-sale debt securities with contractual maturities	572	575
Total available-for-sale debt securities with contractual maturities	572	575
Sovereign debt | Cash and cash equivalents | Level 2
Marketable Securities [Line Items]
Total available-for-sale debt securities with contractual maturities	1,169	2,105
Total available-for-sale debt securities with contractual maturities	1,169	2,105
Sovereign debt | Marketable debt securities | Level 2
Marketable Securities [Line Items]
Total available-for-sale debt securities with contractual maturities	2,492	2,567
Total available-for-sale debt securities with contractual maturities	$ 2,492	$ 2,567

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