Marketable and Other Securities - Fair Value of Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Marketable Securities [Line Items]
Total available-for-sale debt securities with contractual maturities	$ 13,934
Total cash and cash equivalents	16,710	$ 20,067
Cash and cash equivalents	366	466
Total restricted cash	3,005	3,475
Due in one year or less	9,103
Due between one and five years	4,831
Total available-for-sale debt securities with contractual maturities	13,934
Cruise
Marketable Securities [Line Items]
Total cash and cash equivalents	1,800	1,600
Cash and cash equivalents
Marketable Securities [Line Items]
Cash and time deposits	9,092	7,881
Total available-for-sale debt securities with contractual maturities	4,478	8,148
Total available-for-sale debt securities with contractual maturities	4,478	8,148
Cash and cash equivalents | Level 1
Marketable Securities [Line Items]
Money market funds	3,140	4,038
Marketable debt securities
Marketable Securities [Line Items]
Total available-for-sale debt securities with contractual maturities	10,124	8,609
Total available-for-sale debt securities with contractual maturities	10,124	8,609
Marketable debt securities | Cruise
Marketable Securities [Line Items]
Total available-for-sale debt securities with contractual maturities	1,800	1,500
Total available-for-sale debt securities with contractual maturities	1,800	1,500
Other current assets | Level 1
Marketable Securities [Line Items]
Money market funds	2,639	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	152	722
Total available-for-sale debt securities with contractual maturities	152	722
U.S. government and agencies | Marketable debt securities | Level 2
Marketable Securities [Line Items]
Total available-for-sale debt securities with contractual maturities	2,921	2,071
Total available-for-sale debt securities with contractual maturities	2,921	2,071
Corporate debt | Cash and cash equivalents | Level 2
Marketable Securities [Line Items]
Total available-for-sale debt securities with contractual maturities	3,371	5,321
Total available-for-sale debt securities with contractual maturities	3,371	5,321
Corporate debt | Marketable debt securities | Level 2
Marketable Securities [Line Items]
Total available-for-sale debt securities with contractual maturities	3,570	3,396
Total available-for-sale debt securities with contractual maturities	3,570	3,396
Mortgage and asset-backed | Marketable debt securities | Level 2
Marketable Securities [Line Items]
Total available-for-sale debt securities with contractual maturities	605	575
Total available-for-sale debt securities with contractual maturities	605	575
Sovereign debt | Cash and cash equivalents | Level 2
Marketable Securities [Line Items]
Total available-for-sale debt securities with contractual maturities	955	2,105
Total available-for-sale debt securities with contractual maturities	955	2,105
Sovereign debt | Marketable debt securities | Level 2
Marketable Securities [Line Items]
Total available-for-sale debt securities with contractual maturities	3,028	2,567
Total available-for-sale debt securities with contractual maturities	$ 3,028	$ 2,567