Other (Charges) Gains, Net - Schedule of Restructuring Reserve by Type of Cost (Details) - Employee Severance $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($)
Restructuring Reserve [Roll Forward]
Reserve as of the beginning of the period	$ 63
Additions	31
Cash payments	(52)
Other changes	0
Exchange rate changes	1
Reserve as of the end of the period	43
Engineered Materials [Member]
Restructuring Reserve [Roll Forward]
Reserve as of the beginning of the period	57
Additions	15
Cash payments	(41)
Other changes	(4)
Exchange rate changes	1
Reserve as of the end of the period	28
Acetyl Chain [Member]
Restructuring Reserve [Roll Forward]
Reserve as of the beginning of the period	0
Additions	3
Cash payments	(1)
Other changes	0
Exchange rate changes	0
Reserve as of the end of the period	2
Corporate Segment and Other Operating Segment [Member]
Restructuring Reserve [Roll Forward]
Reserve as of the beginning of the period	6
Additions	13
Cash payments	(10)
Other changes	4
Exchange rate changes	0
Reserve as of the end of the period	$ 13