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EVENTS AFTER REPORTING PERIOD EVENTS AFTER REPORTING PERIOD - ADDITIONAL INFORMATION (Details) - Australian Data Transmission and Distribution Operation [Member] [Domain]
Jul. 31, 2019
USD ($)
Disclosure of non-adjusting events after reporting period [line items]  
Proportion of ownership interest in subsidiary 14.00%
Total consideration $ 200,000,000
Consortium  
Disclosure of non-adjusting events after reporting period [line items]  
Percentage of voting equity interests acquired 50.00%