Derivative Financial Instruments (Narrative) (Detail)	3 Months Ended		12 Months Ended
	Dec. 31, 2022 USD ($) derivativeInstrument	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($) derivativeInstrument	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($) derivativeInstrument	Dec. 31, 2021 USD ($) derivativeInstrument
Derivative Instruments, Gain (Loss) [Line Items]
Amount to be reclassified from accumulated other comprehensive income to interest expense in the next twelve months			$ 11,000,000
Net derivative liability position, aggregate fair value	$ 0		0
Interest rate swap terminated
Derivative Instruments, Gain (Loss) [Line Items]
Amount to be reclassified from accumulated other comprehensive income to interest expense in the next twelve months			20,300,000
Forward commitments to sell mortgage loans
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	321,000,000		321,000,000			$ 952,300,000
Mortgage banking derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	$ 190,000,000		$ 190,000,000
Number of derivative instruments held | derivativeInstrument	3		3			0
Not designed as hedging instrument | Interest rate contract
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	$ 0		$ 0
Not designed as hedging instrument | Interest rate contract terminated
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	1,000,000,000		1,000,000,000
Not designed as hedging instrument | Interest rate contract, qualified borrowers
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	9,600,000,000		9,600,000,000
Not designed as hedging instrument | Interest rate lock commitments
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	121,600,000		121,600,000
Not designed as hedging instrument | Forward commitments to sell mortgage loans
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	321,000,000		321,000,000
Not designed as hedging instrument | Commodity forward contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	3,600,000		3,600,000			$ 0
Not designed as hedging instrument | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	$ 226,200,000		$ 226,200,000
Not designed as hedging instrument | Covered call options
Derivative Instruments, Gain (Loss) [Line Items]
Number of derivative instruments held | derivativeInstrument	0		0			0
Interest rate derivatives designated as Cash Flow Hedges | Designated as hedging instrument
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	$ 3,000,000,000		$ 3,000,000,000
Interest rate derivatives designated as Cash Flow Hedges | Designated as hedging instrument | Interest rate swap terminated
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount		$ 1,000,000,000			$ 500,000,000
Derivative term		5 years
Fair value of derivative contracts		$ 66,500,000
Number of derivative instruments held | derivativeInstrument					2
Interest rate derivatives designated as Cash Flow Hedges | Designated as hedging instrument | Interest Rate Swap Terminated, Original Swap Maturing March 2023
Derivative Instruments, Gain (Loss) [Line Items]
Fair value of derivative contracts				$ 3,700,000
Interest rate derivatives designated as Cash Flow Hedges | Designated as hedging instrument | Interest Rate Swap Terminated, Original Swap Maturing April 2024
Derivative Instruments, Gain (Loss) [Line Items]
Fair value of derivative contracts				10,700,000
Interest rate derivatives designated as Cash Flow Hedges | Designated as hedging instrument | Interest Rate Collars Terminated
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	$ 64,300,000		64,300,000
Fair value of derivative contracts				$ 875,000
Number of derivative instruments terminated | derivativeInstrument	1
Interest rate derivatives designated as Fair Value Hedges | Designated as hedging instrument | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	$ 207,200,000		$ 207,200,000
Number of Interest rate derivatives | derivativeInstrument	14		14