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Financial assets and liabilities - Maturity profile of the Business' borrowings (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
Financial liabilities    
Total borrowings $ 3,784 $ 3,630
Deferred debt issue costs (33) (38)
Net borrowings 3,751 3,592
Within one year or on demand    
Financial liabilities    
Total borrowings 140 68
Between one and three years    
Financial liabilities    
Total borrowings 132 100
Between three and five years    
Financial liabilities    
Total borrowings 720 704
Greater than five years    
Financial liabilities    
Total borrowings $ 2,792 $ 2,758