Other (Charges) Gains, Net (Schedule of Restructuring Reserves) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($)
Restructuring Reserve [Roll Forward]
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonrecurring (Income) Expense
Employee Termination Benefits [Member]
Restructuring Reserve [Roll Forward]
Reserve as of the beginning of the period	$ 18
Additions	106
Cash payments	(55)
Other changes	(3)
Exchange rate changes	(3)
Reserve as of the end of the period	63
Engineered Materials | Employee Termination Benefits [Member]
Restructuring Reserve [Roll Forward]
Reserve as of the beginning of the period	13
Additions	89
Cash payments	(40)
Other changes	(2)
Exchange rate changes	(3)
Reserve as of the end of the period	57
Acetyl Chain | Employee Termination Benefits [Member]
Restructuring Reserve [Roll Forward]
Reserve as of the beginning of the period	2
Additions	1
Cash payments	(2)
Other changes	(1)
Exchange rate changes	0
Reserve as of the end of the period	0
Other [Member] | Employee Termination Benefits [Member]
Restructuring Reserve [Roll Forward]
Reserve as of the beginning of the period	3
Additions	16
Cash payments	(13)
Other changes	0
Exchange rate changes	0
Reserve as of the end of the period	$ 6