Restricted Stock, Performance Share and Cash Awards - Additional Information (Detail)				3 Months Ended				6 Months Ended
	May 10, 2022 shares	Mar. 15, 2022 USD ($) shares	Mar. 16, 2021 USD ($) shares	Jun. 30, 2022 USD ($) shares	Mar. 31, 2022 USD ($) shares	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($) shares	Jun. 30, 2022 USD ($) TIME shares	Jun. 30, 2021 USD ($)	Dec. 31, 2021 shares	Mar. 31, 2020 shares	Mar. 12, 2020 USD ($) shares	Mar. 14, 2019 USD ($) shares
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]
Share-based compensation, shares outstanding | shares				8,900,000				8,900,000		7,500,000
Officer and Key Employees [Member]
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]
Performance awards period, years		1 year
Restricted Stock Units (RSUs) [Member]
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]
Shares granted in the period | shares							314,000
Fair value of grants in period							$ 40,100,000
Share based payment award vesting date							Mar. 16, 2026
Period of service from grant date stock options awarded not subject to forfeiture					2 years		2 years
Restricted stock or unit expense				$ 10,100,000		$ 7,600,000		$ 17,700,000	$ 13,500,000
Restricted Stock Units (RSUs) [Member] | Executive Officer [Member] | Minimum [Member]
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]
Minimum age of employee with not subject to award forfeiture on condition compliance					55 years		55 years
Restricted Stock Units (RSUs) [Member] | Tranche One [Member]
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]
Shares granted in the period | shares					335,000
Fair value of grants in period					$ 52,600,000
Share based payment award vesting date					Feb. 01, 2027
Restricted Stock Units (RSUs) [Member] | Tranche Two [Member]
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]
Shares granted in the period | shares					295,000
Fair value of grants in period					$ 46,800,000
Share based payment award vesting date					Mar. 15, 2027
Unvested Restricted Stock [Member]
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]
Total intrinsic value				353,100,000		269,700,000		353,100,000	269,700,000
Equity awards with an aggregate fair value				1,200,000		1,300,000		62,000,000.0	48,100,000
Performance Shares [Member]
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]
Restricted stock or unit expense				3,700,000		3,200,000		7,500,000	6,200,000
Total intrinsic value				54,200,000		55,000,000.0		54,200,000	55,000,000.0
Equity awards with an aggregate fair value								$ 21,800,000	19,100,000
Shares authorized | shares		54,000	67,000
Performance share awards approved, Fair value		$ 8,600,000	$ 8,600,000
Vesting period, years								2 years
2017 Performance Share Awards [Member]
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]
Provisional awards, terms								The 2022 and 2021 awards are subject to a three-year performance period that began on January 1, 2022 and 2021, respectively, and vest on the three-year anniversary of the date of grant (March 15, 2025 and March 16, 2024).
Cash Awards [Member] | Officer and Key Employees [Member]
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]
Provisional awards, terms								The ultimate award value will be equal to the trailing twelve-month price of our common stock on December 31, 2024, multiplied by the number of units subject to the award, but limited to between 0.5 and 1.5 times the original value of the units determined as of the grant date.
Vesting period, years		3 years
Provisional compensation cash awards approved for future grant by compensation committee, value		$ 19,900,000	$ 18,800,000									$ 18,400,000	$ 16,500,000
Provisional compensation cash award approved for future grant by compensation committee, units | shares		125,000	147,000		143,000		208,000				200,000	213,000	206,800
Ultimate award value, multiples of original value of the units, minimum | TIME								0.5
Ultimate award value, multiples of original value of the units, maximum | TIME								1.5
Cash-based compensation awards, expenses								$ 0
2021 Provisional Cash Awards [Member]
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]
Cash-based compensation awards, expenses				2,900,000				$ 5,500,000
Performance awards expiration date								Jan. 01, 2024
2020 Provisional Cash Awards [Member]
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]
Cash-based compensation awards, expenses				$ 2,900,000		2,300,000		$ 6,000,000.0	5,200,000
Performance awards expiration date								Jan. 01, 2023
2019 Provisional Cash Awards [Member]
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]
Provisional compensation cash award approved for future grant by compensation committee, units | shares				177,000				177,000
Cash-based compensation awards, expenses						$ 1,900,000		$ 21,100,000	$ 5,100,000
Performance awards expiration date								Jan. 01, 2022
2018 Provisional Cash Awards [Member]
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]
Provisional compensation cash award approved for future grant by compensation committee, units | shares				176,300				176,300
Cash-based compensation awards, expenses								$ 17,700,000
Long Term Incentive Plan [Member]
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]
Share-based compensation, shares outstanding, Value				$ 4,000,000.0				$ 4,000,000.0
Shares granted in the period | shares	3,500,000							3,300,000