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Investments (Internal Credit Rating Disclosure) (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | $ 8,076 | $ 7,459
High Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 4,460 | 4,212
Internal Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,270 | 2,928
Average Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 282 | 296
Internal Noninvestment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 23 | 7
Watch List [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 41 | 16
Year Of Origination 2024 |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 593 |
Year Of Origination 2024 | High Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 247 |
Year Of Origination 2024 | Internal Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 346 |
Year Of Origination 2024 | Average Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 |
Year Of Origination 2024 | Internal Noninvestment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 |
Year Of Origination 2024 | Watch List [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 |
Year Of Origination 2023 |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,238 | 1,241
Year Of Origination 2023 | High Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 472 | 475
Year Of Origination 2023 | Internal Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 754 | 754
Year Of Origination 2023 | Average Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 12 | 12
Year Of Origination 2023 | Internal Noninvestment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Year Of Origination 2023 | Watch List [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Year Of Origination 2022 |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,366 | 1,303
Year Of Origination 2022 | High Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 659 | 635
Year Of Origination 2022 | Internal Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 707 | 668
Year Of Origination 2022 | Average Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Year Of Origination 2022 | Internal Noninvestment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Year Of Origination 2022 | Watch List [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Year Of Origination 2021 |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,052 | 957
Year Of Origination 2021 | High Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 619 | 573
Year Of Origination 2021 | Internal Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 433 | 384
Year Of Origination 2021 | Average Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Year Of Origination 2021 | Internal Noninvestment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Year Of Origination 2021 | Watch List [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Year Of Origination 2020 [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 528 | 567
Year Of Origination 2020 [Member] | High Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 269 | 304
Year Of Origination 2020 [Member] | Internal Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 241 | 245
Year Of Origination 2020 [Member] | Average Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 18 | 18
Year Of Origination 2020 [Member] | Internal Noninvestment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Year Of Origination 2020 [Member] | Watch List [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Year Of Origination 2019 [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss |  | 867
Year Of Origination 2019 [Member] | High Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss |  | 491
Year Of Origination 2019 [Member] | Internal Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss |  | 313
Year Of Origination 2019 [Member] | Average Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss |  | 63
Year Of Origination 2019 [Member] | Internal Noninvestment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss |  | 0
Year Of Origination 2019 [Member] | Watch List [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss |  | 0
Year Of Origination Prior Periods [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,299 | 2,524
Year Of Origination Prior Periods [Member] | High Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,194 | 1,734
Year Of Origination Prior Periods [Member] | Internal Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 789 | 564
Year Of Origination Prior Periods [Member] | Average Investment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 252 | 203
Year Of Origination Prior Periods [Member] | Internal Noninvestment Grade [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 23 | 7
Year Of Origination Prior Periods [Member] | Watch List [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | $ 41 | $ 16

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