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REVENUE RECOGNITION - Changes in Deferred Revenue (Details)
$ in Millions
3 Months Ended
Sep. 30, 2020
USD ($)
Change in Contract with Customer, Liability [Abstract]  
Balance at the beginning of the period $ 279
Revenue recognized that was included in the deferred revenue balance at the beginning of the period (90)
Revenue deferred during the period 216
Other 4
Balance at the end of the period $ 409