XML 88 R55.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Debt and Financing Activities - Revolving Credit Facilities (Details) - USD ($)
3 Months Ended 6 Months Ended 9 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Sep. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Mar. 31, 2019
Revolving Credit Facility | Global Facility            
Line of Credit Facility [Line Items]            
Syndicated senior unsecured revolving credit facility $ 3,500,000,000     $ 3,500,000,000    
Syndicated senior unsecured revolving credit facility term       5 years    
Borrowings under facility   $ 0 $ 0   $ 0  
Amounts outstanding under facility 0     $ 0   $ 0
Line of Credit            
Line of Credit Facility [Line Items]            
Committed balance 9,000,000     9,000,000    
Uncommitted balance 195,000,000     $ 195,000,000    
Unsecured Debt | Revolving Credit Facility | The 2020 Credit Facility            
Line of Credit Facility [Line Items]            
Syndicated senior unsecured revolving credit facility     4,000,000,000      
Syndicated senior unsecured revolving credit facility term       5 years    
Borrowings under facility 0          
Amounts outstanding under facility $ 0     $ 0    
Debt to capital covenant ratio (no greater than) 65.00%     65.00%    
Unsecured Debt | Revolving Credit Facility | Canadian Dollar, British Pound Sterling, and Euros Sublimit            
Line of Credit Facility [Line Items]            
Syndicated senior unsecured revolving credit facility     $ 3,600,000,000