Supplemental Data Summary of Inventories (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Inventory
Raw materials	$ 301	$ 311
Work in process	146	149
Finished goods	981	952
Supplies and other	251	254
Inventory, Gross	1,679	1,666
Excess of FIFO or weighted-average cost over LIFO cost	200	191
Total	1,479	1,475
LIFO
Inventory
Raw materials	104	114
Work in process	114	111
Finished goods	535	484
Supplies and other	0	0
Inventory, Gross	753	709
Excess of FIFO or weighted-average cost over LIFO cost	200	191
Total	553	518
Non-LIFO
Inventory
Raw materials	197	197
Work in process	32	38
Finished goods	446	468
Supplies and other	251	254
Inventory, Gross	926	957
Excess of FIFO or weighted-average cost over LIFO cost	0	0
Total	$ 926	$ 957