Capital Stock (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Class Of Stock [Line Items]
Common stock cash dividends paid	$ 0	$ 0	$ 0
Common stock issued not disclosed	Common Stock	Common Stock
Common Stock | Payments for Share Repurchases Related to Employee Stock Based Compensation
Class Of Stock [Line Items]
Common stock repurchased (in shares)	0	0	0