Brunswick Corporation Annual report pursuant to Section 13 and 15(d)

Financial Instruments, Consolidated Statements of Operations, Effect of Derivative Instruments (Details)

Financial Instruments, Consolidated Statements of Operations, Effect of Derivative Instruments (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Foreign Exchange Contracts [Member] \| Other Hedging Activity [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) on Derivatives Recognized in Earnings			$ (3.8)	$ 0.2
Foreign Exchange Contracts [Member] \| Cost of Sales [Member] \| Other Hedging Activity [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) on Derivatives Recognized in Earnings			0.3	(0.8)
Foreign Exchange Contracts [Member] \| Other Income, Net [Member] \| Other Hedging Activity [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) on Derivatives Recognized in Earnings			(4.1)	1.0
Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) on Derivatives Recognized in Accumulated Other Comprehensive Loss (Effective Portion)			29.5	(6.4)
Cash Flow Hedging [Member] \| Derivatives Designated as Hedging Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) on Derivatives Recognized in Accumulated Other Comprehensive Loss (Effective Portion)			15.2	(6.4)
Amount of Gain (Loss) Reclassified From Accumulated Other Comprehensive Loss Into Earnings (Effective Portion)			(4.2)	6.8
Cash Flow Hedging [Member] \| Interest Rate Contracts [Member] \| Derivatives Designated as Hedging Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) on Derivatives Recognized in Accumulated Other Comprehensive Loss (Effective Portion)			(1.6)	0.0
Cash Flow Hedging [Member] \| Interest Rate Contracts [Member] \| Interest Expense [Member] \| Derivatives Designated as Hedging Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified From Accumulated Other Comprehensive Loss Into Earnings (Effective Portion)			(0.6)	(0.6)
Cash Flow Hedging [Member] \| Foreign Exchange Contracts [Member] \| Derivatives Designated as Hedging Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) on Derivatives Recognized in Accumulated Other Comprehensive Loss (Effective Portion)			10.7	(7.3)
Cash Flow Hedging [Member] \| Foreign Exchange Contracts [Member] \| Cost of Sales [Member] \| Derivatives Designated as Hedging Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified From Accumulated Other Comprehensive Loss Into Earnings (Effective Portion)			(8.3)	7.4
Cash Flow Hedging [Member] \| Commodity Contracts [Member] \| Derivatives Designated as Hedging Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) on Derivatives Recognized in Accumulated Other Comprehensive Loss (Effective Portion)			6.1	0.9
Cash Flow Hedging [Member] \| Commodity Contracts [Member] \| Cost of Sales [Member] \| Derivatives Designated as Hedging Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified From Accumulated Other Comprehensive Loss Into Earnings (Effective Portion)			4.7	0.0
Cash Flow Hedging [Member] \| Cross Currency Interest Rate Contract \| Derivatives Designated as Hedging Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) on Derivatives Recognized in Accumulated Other Comprehensive Loss (Effective Portion)	$ 14.3	$ 0.0
Fair Value Hedging [Member] \| Interest Rate Contracts [Member] \| Interest Expense [Member] \| Derivatives Designated as Hedging Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) on Derivatives Recognized in Earnings			$ 0.7	$ 0.7