XML 117 R92.htm IDEA: XBRL DOCUMENT v3.10.0.1
Short-Term Debt - Narrative (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Debt Instrument [Line Items]    
Committed credit facilities $ 9,900,000,000  
Debt instrument, term 364 days  
Reclassified to long-term debt $ 9,900,000,000 $ 10,000,000,000
Outstanding amount 0  
Expiring in December 2017    
Debt Instrument [Line Items]    
Committed credit facilities 9,575,000,000  
Expiring in December 2020    
Debt Instrument [Line Items]    
Committed credit facilities $ 325,000,000  
Debt instrument, term 5 years