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REVENUE CONTRACT LIABILITIES ROLL FORWARD (Details) - USD ($)
$ in Millions
3 Months Ended
Jan. 31, 2020
Jan. 31, 2019
Nov. 01, 2019
Nov. 01, 2018
Oct. 31, 2018
Balance at October 31 $ 510 $ 461      
Impact of adopting new revenue standard         $ 76
Balance at November 1 539 443 $ 510 $ 397 $ 461
Deferral of revenue billed in current period, net of recognition 161 167      
Revenue recognized that was deferred as of the beginning of the period (132) (124)      
Contract Liabilities- translation impact 0 3      
Balance at January 31 $ 539 $ 443      
Accounting Standards Update 2014-09          
Impact of adopting new revenue standard     $ 0 $ (64)