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Derivative Instruments - Schedule of Cash Flow Hedges Reclassified from AOCI (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Commodity contracts      
Derivative [Line Items]      
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net $ (1) $ 6 $ 2
Forward exchange contracts      
Derivative [Line Items]      
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net 0 1 0
Treasury locks      
Derivative [Line Items]      
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net 2 0 0
Cash Flow Hedging      
Derivative [Line Items]      
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net (1) (7) (2)
Cash Flow Hedging | Cost of sales | Commodity contracts      
Derivative [Line Items]      
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net 1 (6) (2)
Cash Flow Hedging | Net sales | Forward exchange contracts      
Derivative [Line Items]      
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net 0 (1) 0
Cash Flow Hedging | Interest expense | Treasury locks      
Derivative [Line Items]      
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net $ (2) $ 0 $ 0