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Short-Term Borrowings and Related Weighted-Average Interest Rates (Detail) - USD ($)
$ in Millions
Mar. 31, 2016
Dec. 31, 2015
Short-term Debt [Line Items]    
Amount outstanding $ 2,564 $ 236
Commercial Paper    
Short-term Debt [Line Items]    
Amount outstanding $ 2,291  
Weighted-average rate 0.80% 0.00%
Bank Loans    
Short-term Debt [Line Items]    
Amount outstanding $ 273 $ 236
Weighted-average rate 10.50% 9.50%