Segments - Financial Data for Continuing Operations for Company's Reportable Segments (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total Revenues	$ 5,414.0	$ 4,729.9	$ 4,739.1
Gross profit	1,348.4	1,252.8	1,179.0
Selling, general and administrative expenses	351.0	305.9	302.7
Earnings (Loss) from operations	973.8	1,005.4	884.9
Assets employed	14,393.0	10,580.8	10,131.6
Depreciation, depletion and amortization	451.7	393.5	371.5
Total property additions, including the impact of acquisitions	1,541.5	387.2	387.6
Property additions through acquisitions	1,087.5	20.0
Building Materials Business
Segment Reporting Information [Line Items]
Total Revenues	5,115.3	4,487.2	4,467.8
Gross profit	1,239.9	1,159.8	1,080.6
Selling, general and administrative expenses	247.2	234.9	201.0
Earnings (Loss) from operations	1,006.9	993.4	894.2
Assets employed	13,273.8	9,698.0	9,642.5
Depreciation, depletion and amortization	419.0	364.5	341.3
Total property additions, including the impact of acquisitions	1,504.5	356.9	355.6
Property additions through acquisitions	1,087.5	20.0
Operating Segments | Building Materials Business East Group
Segment Reporting Information [Line Items]
Total Revenues	2,303.0	1,949.1	1,949.0
Gross profit	721.6	619.4	605.7
Selling, general and administrative expenses	104.6	99.2	84.7
Earnings (Loss) from operations	621.7	522.1	527.3
Assets employed	5,009.0	4,342.5	4,320.6
Depreciation, depletion and amortization	196.0	167.9	158.0
Total property additions, including the impact of acquisitions	372.9	159.0	172.9
Property additions through acquisitions	169.2
Operating Segments | Building Materials Business West Group
Segment Reporting Information [Line Items]
Total Revenues	2,812.3	2,538.1	2,518.8
Gross profit	518.3	540.4	474.9
Selling, general and administrative expenses	142.6	135.7	116.3
Earnings (Loss) from operations	385.2	471.3	366.9
Assets employed	8,264.8	5,355.5	5,321.9
Depreciation, depletion and amortization	223.0	196.6	183.3
Total property additions, including the impact of acquisitions	1,131.6	197.9	182.7
Property additions through acquisitions	918.3	20.0
Operating Segments | Building Materials Business
Segment Reporting Information [Line Items]
Total Revenues	5,115.3	4,487.2	4,467.8
Gross profit	1,239.9	1,159.8	1,080.6
Operating Segments | Magnesia Specialties
Segment Reporting Information [Line Items]
Total Revenues	298.7	242.7	271.3
Gross profit	106.5	85.5	95.4
Selling, general and administrative expenses	14.9	14.1	11.3
Earnings (Loss) from operations	90.8	70.7	83.6
Assets employed	168.7	167.9	176.2
Depreciation, depletion and amortization	12.3	11.5	10.2
Total property additions, including the impact of acquisitions	8.2	13.5	20.0
Corporate
Segment Reporting Information [Line Items]
Gross profit	2.0	7.5	3.0
Selling, general and administrative expenses	88.9	56.9	90.4
Earnings (Loss) from operations	(123.9)	(58.7)	(92.9)
Assets employed	950.5	714.9	312.9
Depreciation, depletion and amortization	20.4	17.5	20.0
Total property additions, including the impact of acquisitions	$ 28.8	$ 16.8	$ 12.0