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Income Taxes Operating Loss Carryforwards (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
U.K. |  |
Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforwards | $ 608 | $ 41
Capital loss carryforwards | 533 | 573
U.S. Federal |  |
Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforwards | 1 | 25
Capital loss carryforwards | 112 | 112
Interest Carryforward | 2,269 | 1,140
Foreign tax credit carryforwards | 20 | 18
U.S. State |  |
Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforwards | 473 | 398
Capital loss carryforwards | 123 | 123
Interest Carryforward | 1,187 | 551
Other |  |
Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforwards | 490 | 301
Capital loss carryforwards | 8 | 35
Interest Carryforward | 26 | 26
Other carryforwards | $ 5 | $ 5

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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319 + Details
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