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Leases (Maturities of Lease Liabilities) (Details)
$ in Millions
Jun. 30, 2026
USD ($)
Leases [Abstract]  
2026 (remainder) $ 1 [1]
2027 3 [1]
2028 3
2029 3
2030 3
Thereafter 10
Total future lease payments 23 [1]
Less imputed interest (5)
Total operating lease liabilities 18 [1]
Projected annual sublease income $ 1
[1] Amount is presented net of future sublease income totaling $1 million, which relates to the remainder of the year ending December 31, 2026 and the year ending December 31, 2027.