Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2021	Jun. 30, 2021
Entity Listings [Line Items]
Entity Registrant Name	Longview Acquisition Corp. II
Entity Central Index Key	0001832300
Current Fiscal Year End Date	--12-31
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Entity Address, State or Province	NY
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	true
Class A Common Stock [Member]
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		69,000,000
Class B Common Stock [Member]
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		17,250,000