Long-Term Borrowings - Unsecured Long-Term Borrowings (Parenthetical) (Detail) - Unsecured Debt [Member]	Sep. 30, 2016	Dec. 31, 2015
U.S. Dollar [Member] | Minimum [Member]
Debt Instrument [Line Items]
Fixed interest rate debt obligations interest rates range	1.60%	1.60%
U.S. Dollar [Member] | Maximum [Member]
Debt Instrument [Line Items]
Fixed interest rate debt obligations interest rates range	10.04%	10.04%
U.S. Dollar [Member] | Weighted Average [Member]
Debt Instrument [Line Items]
Fixed interest rate debt obligations interest rates range	4.67%	4.89%
Non-U.S. Dollar [Member] | Minimum [Member]
Debt Instrument [Line Items]
Fixed interest rate debt obligations interest rates range	0.02%	0.40%
Non-U.S. Dollar [Member] | Maximum [Member]
Debt Instrument [Line Items]
Fixed interest rate debt obligations interest rates range	13.00%	13.00%
Non-U.S. Dollar [Member] | Weighted Average [Member]
Debt Instrument [Line Items]
Fixed interest rate debt obligations interest rates range	3.13%	3.81%