Derivative Financial Instruments - Information about Fair Values of Derivative Instruments in Consolidated Balance Sheet (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Offsetting [Abstract]
Reduction in estimated fair value of interest rate contracts in asset position	$ 1,100.0		$ 1,100.0
Reduction in estimated fair value of interest rate contracts in liability position		$ 17.4	$ 29.2