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Net Finance Costs - Summary of Net Finance Costs (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Interest expense using the effective interest rate method:      
Interest on bank loans, overdrafts and all other borrowings $ 1,296 $ 1,168 $ 1,130
Interest capitalised at 4.96% (2018: 4.24%; 2017: 3.25%) (1) (248) (139) (113)
Interest on finance leases 47 59 33
Discounting on provisions and other liabilities 470 414 450
Other gains and losses      
Fair value change on hedged loans 729 (265) (1,185)
Fair value change on hedging derivatives (809) 329 1,244
Exchange variations on net debt 6 (19) (23)
Other 19 20 24
Total financial expenses 1,510 1,567 1,560
Financial income      
Interest income (446) (322) (143)
Net finance costs $ 1,064 $ 1,245 $ 1,417