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v3.23.2

Investments (Short-Term and Long-Term Investments) (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Schedule of Investments [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | $ 47,558 | $ 45,926
Securities, Available for sale Debt Securities, Gross Unrealized Gains | 26 | 59
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (3,456) | (3,664)
Debt Securities, Available-for-sale | 44,128 | 42,321
Held-to-maturity securities, Amortized Cost | 740 | 696
Securities, Held to maturity, Unrecognized Holding Gain | 0 | 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | (14) | (17)
Debt Securities, Held-to-maturity, Fair Value | 726 | 679
Total debt securities, Amortized Cost | 48,298 | 46,622
Total debt securities, Gross Unrealized Gains | 26 | 59
Total debt securities, Gross Unrealized Losses | (3,470) | (3,681)
Debt securities, Fair Value Disclosure | 44,854 | 43,000
Debt Securities [Member] |  |
Schedule of Investments [Line Items] |  |
Debt Securities, Available-for-sale | 44,128 | 42,321
U.S. Government and Agency Obligations [Member] |  |
Schedule of Investments [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 4,990 | 4,093
Securities, Available for sale Debt Securities, Gross Unrealized Gains | 0 | 1
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (283) | (285)
Debt Securities, Available-for-sale | 4,707 | 3,809
Held-to-maturity securities, Amortized Cost | 466 | 578
Securities, Held to maturity, Unrecognized Holding Gain | 0 | 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | (11) | (14)
Debt Securities, Held-to-maturity, Fair Value | 455 | 564
State and Municipal Obligations [Member] |  |
Schedule of Investments [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 7,334 | 7,702
Securities, Available for sale Debt Securities, Gross Unrealized Gains | 10 | 25
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (427) | (479)
Debt Securities, Available-for-sale | 6,917 | 7,248
Held-to-maturity securities, Amortized Cost | 28 | 29
Securities, Held to maturity, Unrecognized Holding Gain | 0 | 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | (3) | (3)
Debt Securities, Held-to-maturity, Fair Value | 25 | 26
Corporate Obligations [Member] |  |
Schedule of Investments [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 23,582 | 23,675
Securities, Available for sale Debt Securities, Gross Unrealized Gains | 11 | 17
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (1,643) | (1,798)
Debt Securities, Available-for-sale | 21,950 | 21,894
Held-to-maturity securities, Amortized Cost | 246 | 89
Securities, Held to maturity, Unrecognized Holding Gain | 0 | 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | 0 | 0
Debt Securities, Held-to-maturity, Fair Value | 246 | 89
U.S. Agency Mortgage-Backed Securities [Member] |  |
Schedule of Investments [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 8,504 | 7,379
Securities, Available for sale Debt Securities, Gross Unrealized Gains | 5 | 15
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (799) | (808)
Debt Securities, Available-for-sale | 7,710 | 6,586
Non-U.S. Agency Mortgage-Backed Securities [Member] |  |
Schedule of Investments [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 3,148 | 3,077
Securities, Available for sale Debt Securities, Gross Unrealized Gains | 0 | 1
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (304) | (294)
Debt Securities, Available-for-sale | $ 2,844 | $ 2,784

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