XML 49 R29.htm IDEA: XBRL DOCUMENT v3.21.2
Debt - Schedule of Annual Maturities of Debt (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
May 31, 2021
Feb. 28, 2021
Debt Instrument [Line Items]      
2021 3Q   $ 259  
2021 4Q   328  
2022   2,782  
2023   6,373  
2024   4,571  
2025   3,994  
Thereafter   13,168  
Total   31,475  
Revolver Facility Expires August 2024 | Unsecured Debt      
Debt Instrument [Line Items]      
Line of credit   $ 3,100 $ 3,100
Term 6 months