Contingencies: (Combustible Tobacco Products Litigation) (Details) - Combustible Products	372 Months Ended
	Dec. 31, 2025 case claim	Dec. 31, 2024 claim	Dec. 31, 2023 case
Combustible Tobacco Products
Loss Contingencies [Line Items]
Claims filed (in claims)	600
Claims on appeal (in cases) | case	1
Health Care Cost Recovery Actions
Loss Contingencies [Line Items]
Claims filed (in claims)	7	17	17
Smoking And Health Class Actions Related To CCAA Plan
Loss Contingencies [Line Items]
Claims released (in claims)	9
Health Care Cost Recovery Actions Related To CCAA Plan
Loss Contingencies [Line Items]
Claims released (in claims)	10