Quarterly report pursuant to Section 13 or 15(d)

Short-term and Long-term Investments, Restricted Deposits - Fair Value of Available-For-Sale Investments with Gross Unrealized Losses by Investment Type and Length of Time (Details)

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Short-term and Long-term Investments, Restricted Deposits - Fair Value of Available-For-Sale Investments with Gross Unrealized Losses by Investment Type and Length of Time (Details) - USD ($)
$ in Millions
Sep. 30, 2022
Dec. 31, 2021
Unrealized Losses    
Less Than 12 Months $ (1,006) $ (102)
12 Months or More (528) (12)
Fair Value    
Fair Value, Less Than 12 Months 12,805 7,602
Fair Value, 12 Months or More 3,256 331
U.S. Treasury securities and obligations of U.S. government corporations and agencies    
Unrealized Losses    
Less Than 12 Months (14) (2)
12 Months or More (4) 0
Fair Value    
Fair Value, Less Than 12 Months 556 598
Fair Value, 12 Months or More 67 3
Corporate securities    
Unrealized Losses    
Less Than 12 Months (562) (66)
12 Months or More (335) (9)
Fair Value    
Fair Value, Less Than 12 Months 6,737 4,209
Fair Value, 12 Months or More 1,975 209
Municipal securities    
Unrealized Losses    
Less Than 12 Months (228) (14)
12 Months or More (92) (1)
Fair Value    
Fair Value, Less Than 12 Months 2,998 1,173
Fair Value, 12 Months or More 586 39
Asset-backed securities    
Unrealized Losses    
Less Than 12 Months (57) (5)
12 Months or More (11) 0
Fair Value    
Fair Value, Less Than 12 Months 1,094 770
Fair Value, 12 Months or More 166 33
Residential mortgage-backed securities    
Unrealized Losses    
Less Than 12 Months (86) (7)
12 Months or More (49) 0
Fair Value    
Fair Value, Less Than 12 Months 770 472
Fair Value, 12 Months or More 244 15
Commercial mortgage-backed securities    
Unrealized Losses    
Less Than 12 Months (59) (8)
12 Months or More (37) (2)
Fair Value    
Fair Value, Less Than 12 Months 650 380
Fair Value, 12 Months or More $ 218 $ 32