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Segment Information - Reconciliation of Segment Operating Results (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Net revenue:
Net revenue	$ 6,949	$ 7,553
Earnings before taxes:
Total segment earnings from operations	348	456
Amortization of intangible assets	(120)	(72)
Transformation costs	(89)	(78)
Acquisition and other related charges	(22)	(63)
Interest and other, net	(19)	(51)
Tax indemnification adjustments	(21)	219
Non-service net periodic benefit credit	37	16
Earnings from equity interests	33	15
Earnings before taxes	378	655
Cray Inc.
Earnings before taxes:
Non-cash inventory fair value adjustment	20
Operating Segment
Net revenue:
Net revenue	7,027	7,693
Earnings before taxes:
Total segment earnings from operations	675	733
Elimination of intersegment net revenue and other
Net revenue:
Net revenue	(78)	(140)
Segment Reconciling Items
Earnings before taxes:
Unallocated corporate costs and eliminations	(52)	(50)
Unallocated stock-based compensation expense	(21)	(14)
Amortization of initial direct costs	(3)	0
Amortization of intangible assets	(120)	(72)
Transformation costs	(89)	(78)
Acquisition and other related charges	(42)	(63)
Interest and other, net	(19)	(51)
Tax indemnification adjustments	(21)	219
Non-service net periodic benefit credit	37	16
Earnings from equity interests	$ 33	$ 15

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