Credit and Other Debt Agreements - Additional Information (Detail) - USD ($) $ in Millions	Feb. 12, 2024	Jun. 30, 2024	Dec. 31, 2023
Fixed Rate of 5.45%, Balloon Due July 15, 2034 [Member]
Debt Instrument [Line Items]
Periodic payment of interest		5.45%	5.45%
Fixed Rate of 5.75%, Balloon Due July 15, 2054 [Member]
Debt Instrument [Line Items]
Periodic payment of interest		5.75%	5.75%
Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Notes issued and sold	$ 1,000.0
Weighted average interest rate	5.71%
Realized a cash gain (loss) on hedging transaction	$ 1.4
Derivative instrument, term	10 years
Unsecured Senior Notes [Member] | Fixed Rate of 5.45%, Balloon Due July 15, 2034 [Member]
Debt Instrument [Line Items]
Notes issued and sold	$ 500.0
Periodic payment of interest	5.45%
Periodic payments of interest and principal, expiry year	2034
Unsecured Senior Notes [Member] | Fixed Rate of 5.75%, Balloon Due July 15, 2054 [Member]
Debt Instrument [Line Items]
Notes issued and sold	$ 500.0
Periodic payment of interest	5.75%
Periodic payments of interest and principal, expiry year	2054