Financing Receivables - Credit Quality - Residential Mortgage Loans by Region (Details) - Consumer Loans - Residential mortgage loans - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Financing receivables - credit quality information
Loans	$ 799	$ 466
Minnesota
Financing receivables - credit quality information
Loans	420	284
Other U.S. States
Financing receivables - credit quality information
Loans	$ 379	$ 182
Total residential mortgage loans \| Credit concentration risk
Financing receivables - credit quality information
Percent of Total Fair Value	100.00%	100.00%
Total residential mortgage loans \| Credit concentration risk \| Minnesota
Financing receivables - credit quality information
Percent of Total Fair Value	53.00%	61.00%
Total residential mortgage loans \| Credit concentration risk \| Other U.S. States
Financing receivables - credit quality information
Percent of Total Fair Value	47.00%	39.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details