Investments in Affiliates (Schedule of Equity Securities Without Readily Determinable Fair Value) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Investments in and Advances to Affiliates [Line Items]
Carrying Value	$ 170	$ 170
Dividend income - equity investments	122	128	$ 126
Acetyl Chain
Investments in and Advances to Affiliates [Line Items]
Carrying Value	165	165
Dividend income - equity investments	121	127	125
Other Activities
Investments in and Advances to Affiliates [Line Items]
Carrying Value	5	5
Dividend income - equity investments	$ 1	$ 1	$ 1