Derivative Financial Instruments - Information about Interest Rate Swap Agreements (Parenthetical) (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Derivative [Line Items]
Notional Amount	$ 21,227,000	$ 17,400,000
Forward-Starting Interest Rate Swap Agreements [Member]
Derivative [Line Items]
Notional Amount	7,300,000	4,700,000
Forward-Starting SOFR-Based Interest Rate Swap Agreements [Member]
Derivative [Line Items]
Notional Amount	13,600,000
Fair Value Hedges [Member]
Derivative [Line Items]
Impact of estimated fair value gain (losses) on hedging instruments	102,400	65,000
Fair Value Hedges [Member] | Forward-Starting SOFR-Based Interest Rate Swap Agreements [Member]
Derivative [Line Items]
Notional Amount	500,000
Cash Flow Hedges [Member]
Derivative [Line Items]
Impact of estimated fair value gain (losses) on hedging instruments	$ 436,700	$ 329,700