Variable Interest Entities - Narrative (Details)	12 Months Ended
	Dec. 31, 2025
SNS
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage	90.00%
Variable interest entity, profits interest, percent	47.00%
IX, LLC
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage	51.00%
LLC & KBR
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage	10.00%
KBR, Inc.
Variable Interest Entity [Line Items]
Variable interest entity, profits interest, percent	53.00%
X-energy | IX, LLC
Variable Interest Entity [Line Items]
Variable interest entity, ownership percentage	49.00%