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Valuation and Qualifying Accounts (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period $ 516 $ 510 $ 605
Addition Charged to Costs and Expenses 77 110 54
Charged to Other Accounts [1] (42) (50) (11)
Deductions [2] 69 54 138
Balance at End of Period 482 516 510
Allowance for Trade Receivables      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period 66 86 118
Addition Charged to Costs and Expenses 14 9 14
Charged to Other Accounts [1] (11) (10) (11)
Deductions [2] 15 19 35
Balance at End of Period 54 66 86
Valuation Allowance for Other Current Receivables      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period 91 73 45
Addition Charged to Costs and Expenses 12 39 20
Charged to Other Accounts [1] 7 (13)  
Deductions [2] 1 8 (8)
Balance at End of Period 109 91 73
Valuation Allowance for Long Term Receivables      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period 14 16 16
Addition Charged to Costs and Expenses 5 1  
Charged to Other Accounts [1] (3) (2)  
Deductions [2]   1  
Balance at End of Period 16 14 16
Allowance for Deferred Taxes      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period 345 335 426
Addition Charged to Costs and Expenses 46 61 20
Charged to Other Accounts [1] (35) (25)  
Deductions [2] 53 26 111
Balance at End of Period $ 303 $ 345 $ 335
[1] Primarily related to divestitures, acquisitions and currency translation.
[2] Represents charges for which allowances were created.