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Borrowings - Lines of Credit (Details)
$ in Billions
3 Months Ended
Mar. 31, 2022
USD ($)
Five-Year Credit Agreement  
Lines of Credit  
Amount of credit facility $ 7.5
Credit facility term 5 years
Three-Year Credit Agreement  
Lines of Credit  
Amount of credit facility $ 2.5
Credit facility term 3 years
Credit Facilities  
Lines of Credit  
Amount of credit facility $ 10.0
Borrowings outstanding $ 0.0