Document and Entity Information	3 Months Ended
	Mar. 31, 2022 shares
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
No Trading Symbol Flag	true
Entity Registrant Name	DOMTAR CORPORATION
Entity Central Index Key	0001381531
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Small Business	false
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding	0
Entity File Number	001-33164
Entity Tax Identification Number	20-5901152
Entity Address, Address Line One	234 Kingsley Park Drive
Entity Address, City or Town	Fort Mill
Entity Address, State or Province	SC
Entity Address, Postal Zip Code	29715
City Area Code	803
Local Phone Number	802-7500
Entity Incorporation, State or Country Code	DE
Document Quarterly Report	true
Document Transition Report	false
Title of 12(b) Security	None