v3.20.4

Cover Page Document | Mar. 10, 2021
--- | ---
Cover [Abstract] |
Document Type | 8-K
Document Period End Date | Mar. 10, 2021
Entity Registrant Name | Post Holdings, Inc.
Entity Incorporation, State or Country Code | MO
Entity File Number | 001-35305
Entity Tax Identification Number | 45-3355106
Entity Address, Address Line One | 2503 S. Hanley Road
Entity Address, City or Town | St. Louis
Entity Address, State or Province | MO
Entity Address, Postal Zip Code | 63144
City Area Code | 314
Local Phone Number | 644-7600
Written Communications | false
Soliciting Material | false
Pre-commencement Tender Offer | false
Pre-commencement Issuer Tender Offer | false
Title of 12(b) Security | Common Stock, $0.01 par value
Trading Symbol | POST
Security Exchange Name | NYSE
Entity Emerging Growth Company | false
Entity Central Index Key | 0001530950
Document Fiscal Year Focus |
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