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Leasing Arrangements - Summary of Lease Assets and Liabilities (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Oct. 01, 2019
ASSETS    
Operating lease right of use asset $ 140 $ 174
Total lease assets 140 174
Liabilities    
Current operating lease obligations 23  
Non-current operating lease obligations 126  
Total lease liabilities $ 149 $ 174