v3.22.4
Financial Instruments - Gross Unrealized Losses and Fair Values for Investments in Unrealized Loss Position (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Investments, Unrealized Loss Position [Line Items]    
Less than 12 Months, Fair Value $ 39,992 $ 67,082
Less than 12 Months, Unrealized Loss (2,029) (494)
12 Months or Greater, Fair Value 35,527 622
12 Months or Greater, Unrealized Loss (2,750) (13)
Total Fair Value 75,519 67,704
Total Unrealized Loss (4,779) (507)
Government bonds    
Investments, Unrealized Loss Position [Line Items]    
Less than 12 Months, Fair Value 21,039 32,843
Less than 12 Months, Unrealized Loss (1,004) (236)
12 Months or Greater, Fair Value 13,438 71
12 Months or Greater, Unrealized Loss (1,041) (2)
Total Fair Value 34,477 32,914
Total Unrealized Loss (2,045) (238)
Corporate debt securities    
Investments, Unrealized Loss Position [Line Items]    
Less than 12 Months, Fair Value 11,228 22,737
Less than 12 Months, Unrealized Loss (440) (152)
12 Months or Greater, Fair Value 15,125 303
12 Months or Greater, Unrealized Loss (1,052) (5)
Total Fair Value 26,353 23,040
Total Unrealized Loss (1,492) (157)
Mortgage-backed and asset-backed securities    
Investments, Unrealized Loss Position [Line Items]    
Less than 12 Months, Fair Value 7,725 11,502
Less than 12 Months, Unrealized Loss (585) (106)
12 Months or Greater, Fair Value 6,964 248
12 Months or Greater, Unrealized Loss (657) (6)
Total Fair Value 14,689 11,750
Total Unrealized Loss $ (1,242) $ (112)