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Basis of Presentation and Significant Accounting Policies Supplemental Cash Flow information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Cash and Cash Equivalents, at Carrying Value	$ 38	$ 60
Income Taxes Paid	4	2
Restricted Cash	10	7	$ 14
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	304	116	61	$ 23
Non Cash Exchange of Puerto Rico Bonds		185
Securities acquired (transferred) in transactions related to Puerto Rico restructurings	(1)
Long-term Debt [Member]
Interest Paid, Including Capitalized Interest, Operating and Investing Activities	50	15
Variable Interest Entity, Primary Beneficiary [Member]
Restricted Cash	$ 256	$ 49	$ 17

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Securities acquired (transferred) in transactions related to Puerto Rico restructurings

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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