Derivative Financial Instruments - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Remaining cumulative basis adjustments on discontinued hedge relationship	$ (1,500,000)	$ (2,900,000)
Cash Flow Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Maximum length of future cash flow hedges	8 years 6 months
Accumulated net gain on derivative contracts included in accumulated other comprehensive loss expected to be recognized in the Consolidated Statements of Comprehensive Income in the following 12 months, net of tax	$ 2,700,000
Reclassification from AOCI	0	$ 0	$ 0
Net Investment Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative notional amount outstanding	348,200,000
Pre-tax gain recognized in OCI	5,300,000
Interest-Rate Contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of outstanding contracts	3,196,700,000
Notional maturities for interest-rate contracts 2020	612,200,000
Notional maturities for interest-rate contracts 2021	1,200,300,000
Notional maturities for interest-rate contracts 2022	864,400,000
Notional maturities for interest-rate contracts 2023	286,800,000
Notional maturities for interest-rate contracts 2024	151,900,000
Notional maturities for interest-rate contracts thereafter	81,100,000
Foreign-exchange contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative notional amount outstanding	$ 1,035,100,000
Foreign-exchange contracts maturity period	within one year