v3.20.4
Financial Instruments - Short-Term Borrowings (Details) - USD ($)
Dec. 31, 2020
Jun. 30, 2020
Dec. 31, 2019
Short-term Debt [Line Items]      
Commercial paper [1] $ 556,000,000   $ 13,915,000,000
Current portion of long-term debt, principal amount [2] 2,004,000,000   1,458,000,000
Other short-term borrowings [3] 145,000,000   860,000,000
Total short-term borrowings, principal amount 2,705,000,000   16,233,000,000
Net fair value adjustments related to hedging and purchase accounting 0   5,000,000
Net unamortized discounts, premiums and debt issuance costs (2,000,000)   (43,000,000)
Total Short-term borrowings, including current portion of long-term debt, carried at historical proceeds, as adjusted $ 2,703,000,000   $ 16,195,000,000
Commercial Paper [Member]      
Short-term Debt [Line Items]      
Commercial paper, weighted average interest rate 0.13%   1.92%
Line of Credit [Member]      
Short-term Debt [Line Items]      
Line of credit facility, maximum borrowing capacity $ 332,000,000    
Line of credit facility, due to expire within one year 300,000,000    
Line of Credit [Member] | Commercial Paper [Member]      
Short-term Debt [Line Items]      
Line of credit facility, maximum borrowing capacity 11,000,000,000    
Line of credit facility, remaining borrowing capacity 11,300,000,000    
Credit Facility Expiring 2025 [Member] | Line of Credit [Member] | Commercial Paper [Member]      
Short-term Debt [Line Items]      
Line of credit facility, maximum borrowing capacity 7,000,000,000    
Facility Expiring September 2021 [Member] | Line of Credit [Member] | Commercial Paper [Member]      
Short-term Debt [Line Items]      
Line of credit facility, maximum borrowing capacity $ 4,000,000,000 $ 4,000,000,000.0  
[1] See Note 2B.
[2] See Note 7D.
[3] Primarily includes cash collateral. See Note 7F.