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Commitments and Contingencies (Details) - USD ($)
$ in Millions
3 Months Ended
Oct. 02, 2015
Mar. 31, 2017
Dec. 31, 2016
Tax Years 2007-2009 [Member]      
IRS Claim      
IRS Claim $ 3,300    
Guarantees of indebtedness owed by third parties      
Guarantees      
Guarantees of indebtedness owed by third parties   $ 578  
VIEs maximum exposures to loss   232  
Risk Management Programs      
Risk Management Programs      
Self-insurance reserves   $ 530 $ 527