| Document and Entity Information | Jul. 30, 2020 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001669812 |
| Document Type | 8-K |
| Document Period End Date | Jul. 30, 2020 |
| Entity Registrant Name | LSC COMMUNICATIONS, INC. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-37729 |
| Entity Tax Identification Number | 36-4829580 |
| Entity Address, Address Line One | 191 North Wacker Drive |
| Entity Address, Address Line Two | Suite 1400 |
| Entity Address, City or Town | Chicago |
| Entity Address, State or Province | IL |
| Entity Address, Postal Zip Code | 60606 |
| City Area Code | (773) |
| Local Phone Number | 272-9200 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
