XML 114 R87.htm IDEA: XBRL DOCUMENT v3.20.4
Debt (Credit Facilities) (Narrative) (Details) - USD ($)
7 Months Ended 12 Months Ended
Dec. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]      
Commercial paper issued   $ 2,300,000,000  
Commercial paper repaid   2,500,000,000  
Commercial paper outstanding $ 75,000,000 $ 75,000,000 $ 200,000,000
Commercial paper maturity duration minimum   14 days  
Commercial paper maturity duration maximum   74 days  
Facility expiration date May 18, 2021    
Line of Credit Facility, Maximum Borrowing Capacity $ 600,000,000 $ 600,000,000  
Amount drawn under line of credit 300,000,000    
Repayments of Lines of Credit 300,000,000    
Line of Credit Facility, Fair Value of Amount Outstanding 0 $ 0  
Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Credit facility term   5 years  
Line of credit facility available credit 2,000,000,000.0 $ 2,000,000,000.0  
Revolving credit facility withdrawals 0 0  
Allowable debt per debt-to-net-worth coverage ratio (as defined in the facility) 36,800,000,000 36,800,000,000  
Outstanding debt (as defined by facility) 28,300,000,000 28,300,000,000  
Cross-default provision (as defined by facility) 150,000,000 150,000,000  
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]      
Debt Instrument [Line Items]      
Line of credit facility available credit $ 2,000,000,000.0 $ 2,000,000,000.0