| Document | Jul. 29, 2021 | Apr. 29, 2021 |
| Document Information [Line Items] | ||
| Document Type | 8-K | |
| Entity Registrant Name | BRUNSWICK CORPORATION | |
| Entity Incorporation, State or Country Code | DE | |
| Entity File Number | 001-01043 | |
| Entity Tax Identification Number | 36-0848180 | |
| Entity Address, Address Line One | 26125 N. Riverwoods Blvd., Suite 500 | |
| Entity Address, City or Town | Mettawa | |
| Entity Address, State or Province | IL | |
| Entity Address, Postal Zip Code | 60045-3420 | |
| City Area Code | (847) | |
| Local Phone Number | 735-4700 | |
| Written Communications | false | |
| Soliciting Material | false | |
| Pre-commencement Tender Offer | false | |
| Pre-commencement Issuer Tender Offer | false | |
| Entity Emerging Growth Company | false | |
| Entity Central Index Key | 0000014930 | |
| Amendment Flag | false | |
| Document Period End Date | Jul. 29, 2021 | |
| 6.500% Senior Notes due 2048 [Member] | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | 6.500% Senior Notes due 2048 | |
| Trading Symbol | BC-A | |
| Security Exchange Name | NYSE | |
| 6.625% Senior Notes due 2049 [Member] | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | 6.625% Senior Notes due 2049 | |
| Trading Symbol | BC-B | |
| Security Exchange Name | NYSE | |
| 6.375% Senior Notes due 2049 [Member] | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | 6.375% Senior Notes due 2049 | |
| Trading Symbol | BC-C | |
| Security Exchange Name | NYSE | |
| CHICAGO STOCK EXCHANGE, INC [Member] | Common Stock [Member] | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | Common stock, par value $0.75 per share | |
| Trading Symbol | BC | |
| Security Exchange Name | CHX | |
| NEW YORK STOCK EXCHANGE, INC. [Member] | Common Stock [Member] | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | Common stock, par value $0.75 per share | |
| Trading Symbol | BC | |
| Security Exchange Name | NYSE |
