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Borrowings - Narrative (Details)
12 Months Ended
Mar. 15, 2019
USD ($)
period
Jan. 25, 2019
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
Apr. 30, 2020
USD ($)
Jan. 31, 2019
USD ($)
Revolving Credit Agreement            
Debt Instrument [Line Items]            
Limit on revolving credit facility $ 1,000,000,000          
Sub-limit for maximum amount of letters of credit issuable under revolving credit facility 150,000,000          
Line of credit facility, maximum borrowing capacity $ 1,500,000,000          
Maturity extension number of one year periods | period 2          
Cash in excess of amount will be deducted from indebtedness for purposes of calculating operating income leverage ratio         $ 500,000,000  
Line of credit facility, commitment fee percentage     0.15%      
Borrowings outstanding       $ 0    
Revolving Credit Agreement | LIBOR            
Debt Instrument [Line Items]            
Debt instrument variable interest rate     1.10%      
Senior Notes issued April 2020            
Debt Instrument [Line Items]            
Senior notes         $ 1,200,000,000  
Senior Notes issued January 2019 | Bridge Credit Agreement            
Debt Instrument [Line Items]            
Senior notes           $ 6,800,000,000
Senior notes            
Debt Instrument [Line Items]            
Early redemption in certain circumstances where a change in control is deemed to have occurred, percent of principal   101.00%        
Senior notes     $ 750,000,000      
Debt instrument interest rate     3.666%