Accumulated Other Comprehensive Income (Loss) - After-Tax Components of and Changes in Accumulated Other Comprehensive (Loss) Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 3,064.8	$ 2,775.5	$ 2,427.8
Distribution of MasterBrand	(1,965.2)
Ending Balance	2,086.9	3,064.8	2,775.5
Foreign Currency Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	3.3	7.2	(11.5)
Amounts classified into accumulated other comprehensive (loss) income	(23.4)	(3.9)	18.7
Net current period other comprehensive (loss) income	(23.4)	(3.9)	18.7
Distribution of MasterBrand	8.0
Ending Balance	12.1	3.3	7.2
Derivative Hedging Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	2.9	4.2	5.5
Amounts classified into accumulated other comprehensive (loss) income	99.6	1.1	(3.7)
Amounts reclassified into earnings	(6.2)	(2.4)	2.4
Net current period other comprehensive (loss) income	93.4	(1.3)	(1.3)
Distribution of MasterBrand	(2.8)
Ending Balance	93.5	2.9	4.2
Defined Benefit Plan Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(30.8)	(66.5)	(66.6)
Amounts classified into accumulated other comprehensive (loss) income	(14.6)	35.1	2.7
Amounts reclassified into earnings	(1.7)	0.6
Net current period other comprehensive (loss) income	(16.3)	35.7	0.1
Distribution of MasterBrand	3.1
Ending Balance	(44.0)	(30.8)	(66.5)
Accumulated Other Comprehensive (Loss) Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(24.6)	(55.1)	(72.6)
Amounts classified into accumulated other comprehensive (loss) income	61.6	32.3	12.3
Amounts reclassified into earnings	(7.9)	(1.8)	5.2
Net current period other comprehensive (loss) income	53.7	30.5	17.5
Distribution of MasterBrand	8.3
Ending Balance	$ 37.4	$ (24.6)	$ (55.1)