Income Taxes - Additional information (Detail) - USD ($) $ in Millions		1 Months Ended	3 Months Ended		12 Months Ended
	Jan. 01, 2023	Feb. 28, 2022	Dec. 31, 2022	Mar. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Taxes
Income tax expense at U.S. federal statutory rate					21.00%	21.00%	21.00%
Equity in net losses of unconsolidated entities					$ 67.0	$ 36.0	$ 68.0
Nondeductible acquisition transaction costs						27.0
Reduction in provision for income taxes due to tax audit settlements					6.0	13.0	10.0
Increase (decrease) to accruals and related deferred taxes					1.0	17.0	(3.0)
Reduction in provision for income taxes due to state net operating losses and credits					8.0	15.0	12.0
Excess tax benefits associated with equity-based compensation					17.0	18.0	27.0
Forecast [Member]
Income Taxes
Alternative fuel tax credits	$ 55.0
Investments Qualifying for Federal Tax Credits [Member]
Income Taxes
Equity in net losses of unconsolidated entities					65.0	51.0	73.0
Income tax (expense) benefit, including tax credits, from equity method investment					99.0	74.0	87.0
Refined Coal Facility [Member]
Income Taxes
Equity method investments impairment charges				$ 7.0			7.0
Low income housing investments [Member]
Income Taxes
Interest expense					$ 14.0	$ 9.0	$ 11.0
Consideration for investment		$ 253.0
Investment cash payment		28.0
Interest payable		42.0
Increase (decrease) investments in unconsolidated entities		$ 211.0
2017 Audit [Member]
Income Taxes
Income tax deposit paid			$ 103.0