Quarterly report pursuant to Section 13 or 15(d)

Investments (Details 2)

v3.8.0.1
Investments (Details 2) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 30, 2018
Mar. 31, 2017
Dec. 31, 2017
Equity securities, by type      
Net gains (losses) recognized during the period on equity securities $ (79,000,000)    
Gain (Loss) on Sale of Equity Investments 3,000,000    
Unrealized Gain (Loss) on Securities (82,000,000)    
Equity securities with changes in fair value recognized in income 2,289,000,000    
Securities Owned Not Readily Marketable 104,000,000    
Available-for-sale Securities Fair Value 6,077,000,000    
Equity securities, cost     $ 1,600,000,000
Equity securities, gross unrealized gain     760,000,000
Equity securities, gross unrealized loss     (70,000,000)
Equity Securities     2,290,000,000
Debt Securities [Member]      
Equity securities, by type      
Trading Securities, Unrealized Holding Gain 0   0
Trading Securities, Unrealized Holding Loss 0   0
Trading Securities 37,000,000   12,000,000
Available-for-sale Securities Fair Value 6,077,000,000   5,912,000,000
Available-for-sale Securities, Gross Realized Gains 0 $ 4,000,000  
Available-for-sale Securities, Gross Realized Losses (5,000,000) (4,000,000)  
Proceeds from Sale of Available-for-sale Securities 3,087,000,000 3,012,000,000  
Trading Securities [Member]      
Equity securities, by type      
Equity Securities     395,000,000
Equity Securities      
Equity securities, by type      
Trading Securities, Cost     324,000,000
Trading Securities, Unrealized Holding Gain     75,000,000
Trading Securities, Unrealized Holding Loss     (4,000,000)
Trading Securities     395,000,000
Available-for-sale Securities, Amortized Cost Basis     1,276,000,000
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax     685,000,000
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax     (66,000,000)
Available-for-sale Securities Fair Value     1,895,000,000
Available-for-sale Securities, Gross Realized Gains   22,000,000  
Available-for-sale Securities, Gross Realized Losses   (3,000,000)  
Proceeds from Sale of Available-for-sale Securities   $ 82,000,000  
Available-for-sale Securities [Member]      
Equity securities, by type      
Equity Securities     1,895,000,000
Marketable Securities [Member]      
Equity securities, by type      
Equity securities with changes in fair value recognized in income 335,000,000    
Securities Owned Not Readily Marketable 0    
Marketable Securities [Member] | Trading Securities [Member]      
Equity securities, by type      
Equity Securities     283,000,000
Marketable Securities [Member] | Available-for-sale Securities [Member]      
Equity securities, by type      
Equity Securities     52,000,000
Other Investments [Member]      
Equity securities, by type      
Equity securities with changes in fair value recognized in income 935,000,000    
Securities Owned Not Readily Marketable 104,000,000    
Other Investments [Member] | Trading Securities [Member]      
Equity securities, by type      
Equity Securities     0
Other Investments [Member] | Available-for-sale Securities [Member]      
Equity securities, by type      
Equity Securities     953,000,000
Other Assets      
Equity securities, by type      
Equity securities with changes in fair value recognized in income 1,019,000,000    
Securities Owned Not Readily Marketable $ 0    
Other Assets | Trading Securities [Member]      
Equity securities, by type      
Equity Securities     112,000,000
Other Assets | Available-for-sale Securities [Member]      
Equity securities, by type      
Equity Securities     $ 890,000,000