Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Inventories determined using LIFO method	76.00%	77.00%
Current cost of inventories over LIFO amounts	$ 700	$ 700
Revenue, contract duration	1 year
Receivables	$ 263	177	$ 71
Revenue, performance obligation, description of timing	three days
Contract with customer, liability	$ 231	$ 215	$ 258
Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful life of property, plant and equipment	20 years
Maximum [Member] | Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Useful life of property, plant and equipment	50 years
USSTC [Member]
Property, Plant and Equipment [Line Items]
Revenue, performance obligation, description of timing	one business day
Helix Innovations LLC [Member]
Property, Plant and Equipment [Line Items]
Revenue, performance obligation, description of timing	one business day
NJOY Holdings, Inc. [Member]
Property, Plant and Equipment [Line Items]
Revenue, performance obligation, description of timing	one business day