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Receivables - Additional Information (Detail)
 12 Months Ended
Mar. 30, 2012
USD ($)
Dec. 31, 2016
USD ($)
Agreement
Dec. 31, 2015
USD ($)
Schedule Of Financial Receivables [Line Items]      
Number of arrangement with different financial institution to sell customer receivables | Agreement   3  
Sale of customer receivables $ 304,000,000    
Cash received for receivables 50,000,000    
Deferred purchase price receivable $ 254,000,000 $ 83,000,000 $ 249,000,000
Net cash funding received since inception   300,000,000  
Amount of cash draws under arrangement since inception   1,758,000,000  
Amount of cash repayments under arrangement since inception   1,458,000,000  
Net cash funding received during the period   100,000,000  
Amount of cash draws under arrangement during the period   500,000,000 0
Amount of cash repayments under arrangement during the period   400,000,000 0
Accounts receivables   29,938,000,000  
Cash collections of other receivables   29,505,000,000  
Gross cash outflows from deferred purchased receivables   5,340,000,000 5,406,000,000
Gross cash inflows from deferred purchased receivables   6,893,000,000 $ 7,001,000,000
Minimum [Member]      
Schedule Of Financial Receivables [Line Items]      
Funding of customer receivables sold   200,000,000  
Maximum [Member]      
Schedule Of Financial Receivables [Line Items]      
Funding of customer receivables sold   $ 400,000,000