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Financial Instruments - Fair Values on Recurring Basis (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Equity Securities, FV-NI, Gain (Loss)          
Equity securities, unrealized gain (loss) $ (4,200) $ 119 $ (12,300) $ 122  
Rivian          
Equity Securities, FV-NI, Gain (Loss)          
Equity investment, fair value 4,100   4,100   $ 15,600
Equity investment, discount due to lack of marketability         800
Recurring          
Schedule of Investments [Line Items]          
Cash 9,825   9,825   10,942
Debt Securities, Available-for-sale          
Gross unrealized gains 0   0    
Gross unrealized losses (978)   (978)    
Cash, Cash Equivalents, and Marketable Securities          
Cash, cash equivalents and marketable securities 60,932   60,932   96,309
Cash, cash equivalents and marketable securities, amortized cost 56,934   56,934    
Less: Restricted cash, cash equivalents, and marketable securities (222)   (222)   (260)
Total cash, cash equivalents, and marketable securities 60,710   60,710   96,049
Recurring | Level 1 securities          
Schedule of Investments [Line Items]          
Equity securities 4,946   4,946   1,646
Recurring | Level 1 securities | Money market funds          
Schedule of Investments [Line Items]          
Money market funds 18,816   18,816   20,312
Recurring | Level 1 securities | Money market funds | Money market funds          
Schedule of Investments [Line Items]          
Money market funds 18,816   18,816    
Recurring | Level 2 securities          
Schedule of Investments [Line Items]          
Equity securities 30   30   15,740
Recurring | Level 2 securities | Foreign government and agency securities          
Debt Securities, Available-for-sale          
Fixed income securities, amortized cost 50   50    
Gross unrealized gains 0   0    
Gross unrealized losses (1)   (1)    
Fixed income securities 49   49   181
Recurring | Level 2 securities | U.S. government and agency securities          
Debt Securities, Available-for-sale          
Fixed income securities, amortized cost 2,344   2,344    
Gross unrealized gains 0   0    
Gross unrealized losses (122)   (122)    
Fixed income securities 2,222   2,222   4,300
Recurring | Level 2 securities | Corporate debt securities          
Debt Securities, Available-for-sale          
Fixed income securities, amortized cost 21,756   21,756    
Gross unrealized gains 0   0    
Gross unrealized losses (673)   (673)    
Fixed income securities 21,083   21,083   35,764
Recurring | Level 2 securities | Asset-backed securities          
Debt Securities, Available-for-sale          
Fixed income securities, amortized cost 3,736   3,736    
Gross unrealized gains 0   0    
Gross unrealized losses (164)   (164)    
Fixed income securities 3,572   3,572   6,738
Recurring | Level 2 securities | Other fixed income securities          
Debt Securities, Available-for-sale          
Fixed income securities, amortized cost 407   407    
Gross unrealized gains 0   0    
Gross unrealized losses (18)   (18)    
Fixed income securities $ 389   $ 389   $ 686