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Borrowings, Note Issuances (Details) - USD ($)
$ in Millions
Jun. 01, 2016
Nov. 30, 2016
Jun. 02, 2016
Total $6.0 billion debt issuance [Member]      
Debt Instrument [Line Items]      
Fair value of the notes   $ 5,900  
Carrying value of the notes   6,000  
Net proceeds from notes payable $ 6,000    
Total issuance costs     $ 30
Percentage of principal amount of fixed rate notes can be redeemed 101.00%    
Total $8.0 Billion Debt Issuance [Member]      
Debt Instrument [Line Items]      
Fair value of the notes   7,300  
Carrying value of the notes   7,200  
Total 700 million Pounds Debt Issuance [Member]      
Debt Instrument [Line Items]      
Fair value of the notes   900  
Carrying value of the notes   900  
Total 750 million Euros Debt Issuance [Member]      
Debt Instrument [Line Items]      
Fair value of the notes   800  
Carrying value of the notes   800  
Total $4.0 Billion Debt Issuance [Member]      
Debt Instrument [Line Items]      
Fair value of the notes   1,700  
Carrying value of the notes   1,700  
Total $1.0 Billion Debt Issuance [Member]      
Debt Instrument [Line Items]      
Fair value of the notes   300  
Carrying value of the notes   $ 200