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Derivative Financial Instruments (AOCI Related to Cash Flow Hedges) (Narrative) (Detail)
$ in Millions
9 Months Ended
Sep. 30, 2019
USD ($)
Derivative Instruments, Gain (Loss) [Line Items]  
Loss from Components Excluded from Assessment of Fair Value Hedge Effectiveness $ 13.5
Gain (Loss) on Components Excluded from Assessment of Interest Rate Cash Flow Hedge Effectiveness 12.9
Cash Flow Hedging [Member]  
Derivative Instruments, Gain (Loss) [Line Items]  
Estimate of amount to be reclassified from AOCL (2.7)
Remaining unamortized gain (loss) on termination of cash flow hedges (5.8)
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]  
Derivative Instruments, Gain (Loss) [Line Items]  
Estimate of amount to be reclassified from AOCL $ 4.4