Segment Reporting - Segment Assets to Total Assets (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 3,201	$ 3,414
Operating Segments | Reportable Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	3,144	3,345
Segment Reporting, Reconciling Item, Corporate Nonsegment
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 57	$ 69