XML 82 R69.htm IDEA: XBRL DOCUMENT v3.4.0.3
Derivative Financial Instruments - Information about Interest Rate Swap Agreements (Detail) - Fixed Rate Long-Term Borrowings [Member] - Fair Value Hedges [Member] - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2016
Dec. 31, 2015
Derivative [Line Items]    
Notional Amount $ 1,400,000,000 $ 1,400,000,000
Average Maturity (in years) 1 year 4 months 24 days 1 year 8 months 12 days
Weighted-Average Rate, Fixed 4.42% 4.42%
Weighted-Average Rate, Variable 1.59% 1.39%