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REVENUE RECOGNITION (Tables) | 6 Months Ended
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Dec. 31, 2019
REVENUE RECOGNITION |
Schedule of significant changes in deferred revenue | ​
​ | ​ | ​ | ​
(In millions) |  | December 31, 2019
Balance at June 30, 2019 | ​ | $ | 361
Revenue recognized that was included in the deferred revenue balance at the beginning of the period | ​ |  | (243)
Revenue deferred during the period | ​ |  | 307
Balance at December 31, 2019 | ​ | $ | 425

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- Definition Tabular disclosure of contract balances and changes in contract balances. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130551-203045 + Details
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