Keysight (KEYS) 10-K 18 Dec 18 2018 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($) $ in Billions	12 Months Ended
	Oct. 31, 2018	Dec. 10, 2018	Apr. 30, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	Keysight Technologies, Inc.
Entity Central Index Key	1,601,046
Current Fiscal Year End Date	--10-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 6
Entity Common Stock, Shares Outstanding		187,641,764
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Document Type	10-K
Amendment Flag	false
Document Period End Date	Oct. 31, 2018
Trading Symbol	KEYS
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false

CONSOLIDATED STATEMENT OF OPERA

CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Net revenue:
Total net revenue	$ 3,878	$ 3,189	$ 2,918
Costs and expenses:
Cost of Goods and Services Sold	1,756	1,487	1,294
Research and Development Expense	607	498	425
Selling, General and Administrative Expense	1,185	1,049	818
Goodwill impairment	709	0	0
Other Operating Income (Expense), Net	33	84	25
Total costs and expenses	4,224	2,950	2,512
Income (loss) from operations	(346)	239	406
Interest income	12	7	3
Interest expense	(83)	(80)	(47)
Other income (expense), net	6	13	4
Income (loss) before taxes	(411)	179	366
Provision (benefit) for income taxes	(576)	77	31
Net income	$ 165	$ 102	$ 335
Net income per share:
Basic (in dollars per share)	$ 0.88	$ 0.57	$ 1.97
Diluted (in dollars per share)	$ 0.86	$ 0.56	$ 1.95
Weighted average shares used in computing net income per share:
Basic (in shares)	187	180	170
Diluted (in shares)	191	182	172
Products
Net revenue:
Total net revenue	$ 3,229	$ 2,664	$ 2,440
Costs and expenses:
Cost of Goods and Services Sold	1,440	1,206	1,042
Service, Other [Member]
Net revenue:
Total net revenue	649	525	478
Costs and expenses:
Cost of Goods and Services Sold	$ 316	$ 281	$ 252

CONSOLIDATED STATEMENT OF COMPR

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 165	$ 102	$ 335
Other comprehensive income (loss):
Unrealized gain (loss) on investments, net of tax benefit (expense) of $3, $(1) and $2	(14)	4	(11)
Unrealized gain (loss) on derivative instruments, net of tax benefit (expense) of zero, $(2) and $2	0	4	(5)
Amounts reclassified into earnings related to derivative instruments, net of tax benefit (expense) of $1, $(1) and $(4)	(3)	0	8
Foreign currency translation, net of tax benefit (expense) of zero	(21)	(10)	19
Net defined benefit pension cost and post retirement plan costs:
Change in actuarial net gain (loss), net of tax benefit (expense) of $(7), $(68) and $53	23	178	(135)
Change in net prior service credit, net of tax benefit of $6, $9 and $10	(16)	(15)	(15)
Other comprehensive income (loss)	(31)	161	(139)
Total comprehensive income	$ 134	$ 263	$ 196

CONSOLIDATED STATEMENT OF COM_2

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Parenthetical Disclosures [Abstract]
Unrealized gain on investments, tax benefit (expense)	$ 3	$ (1)	$ 2
Unrealized gain (loss) on derivative instruments, tax benefit (expense)	0	(2)	2
Amounts reclassified into earnings related to derivative instruments, tax benefit (expense)	1	(1)	(4)
Foreign currency translation, tax benefit (expense)	0	0	0
Change in actuarial net loss, tax benefit (expense)	(7)	(68)	53
Change in net prior service credit, tax benefit	$ 6	$ 9	$ 10

CONSOLIDATED BALANCE SHEET

CONSOLIDATED BALANCE SHEET - USD ($) $ in Millions	Oct. 31, 2018	Oct. 31, 2017
Current assets:
Cash and cash equivalents	$ 913	$ 818
Accounts receivable, net	624	547
Inventory	619	588
Other current assets	222	224
Total current assets	2,378	2,177
Property, plant and equipment, net	555	530
Goodwill	1,171	1,882
Other intangible assets, net	645	855
Long-term investments	46	63
Long-term deferred tax assets	750	186
Other assets	279	240
Total assets	5,824	5,933
Current liabilities:
Debt, Current	499	10
Accounts payable	242	211
Employee compensation and benefits	276	217
Deferred revenue	334	291
Income and other taxes payable	42	28
Other accrued liabilities	69	62
Total current liabilities	1,462	819
Long-term debt	1,291	2,038
Retirement and post-retirement benefits	224	309
Long-term deferred revenue	127	101
Other long-term liabilities	287	356
Total liabilities	3,391	3,623
Commitments and contingencies (Note 16)
Stockholders' equity:
Preferred stock; $0.01 par value; 100 million shares authorized; none issued and outstanding	0	0
Common stock; $0.01 par value; 1 billion shares authorized; 191 million shares at October 31, 2018, and 188 million shares at October 31, 2017 issued	2	2
Treasury stock at cost; 4.4 million shares at October 31, 2018 and 2.3 million shares at October 31, 2017	(182)	(62)
Additional paid-in-capital	1,889	1,786
Retained earnings	1,212	1,041
Accumulated other comprehensive loss	(488)	(457)
Total stockholders' equity	2,433	2,310
Total liabilities and equity	$ 5,824	$ 5,933

CONSOLIDATED BALANCE SHEET (Par

CONSOLIDATED BALANCE SHEET (Parenthetical) - $ / shares shares in Millions	Oct. 31, 2018	Oct. 31, 2017
Stockholders' equity:
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	100	100
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000	1,000
Common stock, shares issued (in shares)	191	188
Treasury Stock, Common, Shares	4.4	2.3

CONSOLIDATED STATEMENT OF CASH

CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Cash flows from operating activities:
Net income	$ 165	$ 102	$ 335
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	103	92	85
Amortization	207	133	49
Share-based compensation	59	56	49
Amortization of Debt Issuance Costs	0	9	0
Deferred tax expense (benefit)	(789)	(47)	17
Excess and obsolete inventory related charges	25	16	17
Gain on sale of assets and divestitures	(20)	(8)	(10)
Goodwill impairment	709	0	0
Pension curtailment and settlement loss (gain)	1	(69)	0
Other non-cash expenses, net	15	17	4
Changes in assets and liabilities:
Accounts receivable	(89)	(11)	(42)
Inventory	(61)	(4)	(22)
Accounts payable	22	15	(8)
Employee compensation and benefits	63	(1)	16
Increase (Decrease) in Deferred Revenue	75	90	15
Income taxes payable	181	3	(9)
Retirement and post-retirement benefits	(127)	(15)	(32)
Other assets and liabilities	16	(50)	(44)
Net cash provided by operating activities	555	328	420
Cash flows from investing activities:
Purchases of property, plant and equipment	(132)	(72)	(91)
Proceeds from the sale of assets and divestitures	29	8	10
Acquisitions of businesses and intangible assets, net of cash acquired	(11)	(1,702)	(10)
Proceeds from the sale of investments	0	45	1
Other investing activities	(2)	(1)	0
Net cash used in investing activities	(116)	(1,722)	(90)
Cash flows from financing activities:
Issuance of common stock under employee stock plans	64	51	43
Proceeds from Issuance of Common Stock	0	444	0
Payment of taxes related to net share settlement of equity awards	(18)	(12)	(9)
Payments for Repurchase of Common Stock	(120)	0	(62)
Proceeds from issuance of long-term debt	0	1,069	0
Debt issuance costs	0	(16)	0
Proceeds from short-term borrowings	40	212	0
Repayment of debt and credit facility	(300)	(323)	(1)
Other financing activities	(1)	0	0
Net cash provided by/(used in) financing activities	(335)	1,425	(29)
Effect of exchange rate movements	(9)	4	(1)
Net increase in cash and cash equivalents	95	35	300
Cash and cash equivalents at beginning of year	818	783	483
Cash and cash equivalents at end of year	$ 913	$ 818	$ 783

CONSOLIDATED STATEMENT OF EQUIT

CONSOLIDATED STATEMENT OF EQUITY - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]	Treasury Stock [Member]
Treasury Stock, Shares	0
Beginning Balance at Oct. 31, 2015	$ 1,302	$ 2	$ 1,165	$ 614	$ (479)	$ 0
Beginning Balance (in shares) at Oct. 31, 2015		169,591,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	335			335
Other comprehensive income, net of tax	(139)				(139)
Issuance of common stock	34		34
Share-based awards issued (in shares)		2,696,000
Share-based compensation	48		48
Tax deficiency from share-based awards issued	(5)		(5)
Treasury Stock, Shares, Acquired						(2,289,000)
Repurchase of common stock (at cost)	(62)					$ (62)
Ending Balance at Oct. 31, 2016	$ 1,513	$ 2	1,242	949	(618)	(62)
Ending Balance (in shares) at Oct. 31, 2016		172,287,000
Treasury Stock, Shares	(2,289,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 102			102
Other comprehensive income, net of tax	161				161
Adjustment due to adoption of ASU 2016-09	(10)			(10)
Public offering of common stock (Value)	444		444
Issuance of common stock	41		41
Share-based awards issued (in shares)		2,880,000
Stock Issued During Period, Shares, New Issues		13,143,000
Share-based compensation	56		56
Tax benefits from share-based awards issued	$ (3)		3
Treasury Stock, Shares, Acquired	0
Ending Balance at Oct. 31, 2017	$ 2,310	$ 2	1,786	1,041	(457)	$ (62)
Ending Balance (in shares) at Oct. 31, 2017		188,310,000
Treasury Stock, Shares						(2,289,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	165			165
Other comprehensive income, net of tax	(31)				(31)
Adjustment due to adoption of ASU 2016-09	6			6
Issuance of common stock	44		44
Share-based awards issued (in shares)		2,894,000
Share-based compensation	$ 59		59
Treasury Stock, Shares, Acquired	(2,075,460)					(2,075,000)
Repurchase of common stock (at cost)	$ (120)					$ (120)
Ending Balance at Oct. 31, 2018	$ 2,433	$ 2	$ 1,889	$ 1,212	$ (488)	$ (182)
Ending Balance (in shares) at Oct. 31, 2018		191,204,000
Treasury Stock, Shares						(4,364,000)

OVERVIEW AND SUMMARY OF SIGNIFI

OVERVIEW AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Oct. 31, 2018
Accounting Policies [Abstract]
OVERVIEW AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	OVERVIEW, BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Overview. Keysight Technologies, Inc. ("we," "us," "Keysight" or the "company"), incorporated in Delaware on December 6, 2013, is a technology company providing electronic design and test solutions that are used in the design, development, manufacture, installation, deployment, validation, optimization and secure operation of electronics systems to communications, networking and electronics industries. In addition, we provide testing, visibility, and security solutions, strengthening applications across physical and virtual networks. We also offer customization, consulting and optimization services throughout the customer's product lifecycle, including start-up assistance, instrument productivity, application services and instrument calibration and repair. Basis of Presentation. We have prepared the accompanying financial statements pursuant to the rules and regulations of the SEC and in conformity with generally accepted accounting principles in the U.S. ("GAAP"). Our fiscal year end is October 31. Unless otherwise stated, all years and dates refer to our fiscal year. Management is responsible for the fair presentation of the accompanying consolidated financial statements, prepared in accordance with GAAP, and has full responsibility for their integrity and accuracy. In the opinion of management, the accompanying consolidated financial statements contain all normal and recurring adjustments necessary to present fairly our consolidated balance sheet and our consolidated statement of operations, statement of comprehensive income, statement of cash flows and statement of equity. Principles of consolidation. The consolidated financial statements include the accounts of the company and our wholly- and majority-owned subsidiaries. All significant inter-company transactions have been eliminated. Use of Estimates. The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the amounts reported in our consolidated financial statements and accompanying notes. Management bases its estimates on historical experience and various other assumptions believed to be reasonable. Although these estimates are based on management's knowledge of current events and actions that may impact the company in the future, actual results may be different from the estimates. Our critical accounting policies are those that affect our financial statements materially and involve difficult, subjective or complex judgments by management. Those policies are revenue recognition, inventory valuation, share-based compensation, retirement and post-retirement plan assumptions, valuation of goodwill and other intangible assets, warranty, loss contingencies, restructuring and accounting for income taxes. Acquisitions . On April 18, 2017 we acquired all of the outstanding common stock of Ixia for $1,622 million , net of $72 million of cash acquired. On August 31, 2017 we acquired all of the outstanding common stock of ScienLab for $60 million , net of $2 million of cash acquired. See Note 3, "Acquisitions," for further discussion of the company's acquisitions. Revenue recognition. We enter into agreements to sell products (hardware and/or software), services and other arrangements (multiple-element arrangements) that include combinations of products and services. We recognize revenue, net of trade discounts and allowances, provided that (1) persuasive evidence of an arrangement exists, (2) delivery has occurred, (3) the price is fixed or determinable and (4) collectability is reasonably assured. Delivery is considered to have occurred when title and risk of loss have transferred to the customer, for products, or when the service has been provided. We consider the price to be fixed or determinable when the price is not subject to refund or adjustments. We consider arrangements with extended payment terms not to be fixed or determinable, and accordingly we defer revenue until amounts become due. At the time of the transaction, we evaluate the creditworthiness of our customers to determine the appropriate timing of revenue recognition. Product revenue. Our product revenue is generated predominantly from the sales of various types of test equipment and associated software. Product revenue, including sales to resellers and distributors, is reduced for estimated returns, when appropriate. For sales or arrangements that include customer-specified acceptance criteria, including those where acceptance is required upon achievement of performance milestones, revenue is recognized after the acceptance criteria have been met. For products that include installation, if the installation meets the criteria to be considered a separate element, product revenue is recognized upon delivery, and recognition of installation revenue is delayed until the installation is complete. Otherwise, neither the product nor the installation revenue is recognized until the installation is complete. Where software is licensed separately, revenue is recognized when the software is delivered and has been transferred to the customer or, in the case of electronic delivery of software, when the customer is given access to the licensed software programs. We also evaluate whether collection of the receivable is probable, the fee is fixed or determinable and whether any other undelivered elements of the arrangement exist on which a portion of the total fee would be allocated based on vendor-specific objective evidence ("VSOE"). When VSOE is not available, we use third-party evidence ("TPE") or management's best estimate of selling price ("ESP"). Service revenue. Revenue from services includes repair and calibration services, extended warranty, customer and software support, consulting, training and education. Service revenue is deferred and recognized over the contractual period or as services are rendered and accepted by the customer. For example, customer support contracts are recognized ratably over the contractual period, while training revenue is recognized as the training is provided to the customer. In addition, the four revenue recognition criteria described above must be met before service revenue is recognized. Revenue recognition for arrangements with multiple deliverables. Our multiple-element arrangements are generally comprised of a combination of measurement instruments, installation or other start-up services, and/or software and/or support or services. Hardware and software elements are typically delivered at the same time, and revenue is recognized upon delivery and acceptance, if required, once title and risk of loss pass to the customer. Delivery of installation, start-up services and other services varies based on the complexity of the equipment, staffing levels in a geographic location and customer preferences, and can range from a few days to a few months. Service revenue is deferred and recognized over the contractual period or as services are rendered and accepted by the customer. Revenue from the sale of software products that are not required to deliver the tangible product's essential functionality are accounted for under software revenue recognition rules, which require VSOE of fair value to allocate revenue in a multiple-element arrangement. Our arrangements generally do not include any provisions for cancellation, termination or refunds that would significantly impact recognized revenue. We evaluate the deliverables in our multiple-element arrangements and conclude that they are separate units of accounting if it is determined the delivered item or items have value to the customer on a standalone basis. For arrangements that include a general right of return relative to the delivered item(s), delivery or performance of the undelivered item(s) has been determined to be probable and substantially in our control. We allocate revenue to each element in our multiple-element arrangements based on their relative selling prices. We determine the selling price for each deliverable based on a selling price hierarchy. The selling price for a deliverable is based on VSOE if available, TPE if VSOE is not available, or ESP if neither VSOE nor TPE is available. Revenue allocated to each element is then recognized when the basic revenue recognition criteria for that element have been met. Within our Ixia Solutions Group, when an arrangement contains software and non-software deliverables, we use a two-step process to allocate revenue to each element in the arrangement. First, we allocate the total arrangement fee to the separate non-software and software deliverables as a group based on their relative selling prices. Then, we allocate revenue within the software group utilizing the residual method with revenue allocated to the undelivered elements based on VSOE and the residual amount allocated to the delivered elements. We use VSOE of selling price in the selling price allocation in all instances where it exists. VSOE of selling price for products and services is determined when a substantial majority of the selling prices fall within a reasonable range when sold separately. TPE of selling price can be established by evaluating largely interchangeable competitor products or services in standalone sales to similarly situated customers. As our products contain a significant element of proprietary technology and the solution offered differs substantially from that of competitors, it is difficult to obtain the reliable standalone competitive pricing necessary to establish TPE. ESP represents the best estimate of the price at which we would transact a sale if the product or service were sold on a standalone basis. We determine ESP for a product or service by using historical selling prices that reflect multiple factors including, but not limited to, customer type, geography, market conditions, competitive landscape, gross margin objectives and pricing practices. The determination of ESP is made through consultation with and approval by management. We may modify or develop new pricing practices and strategies in the future. As these pricing strategies evolve, changes may occur in ESP. The aforementioned factors may result in a different allocation of revenue to the deliverables in multiple-element arrangements, which may change the pattern and timing of revenue recognition for these elements but will not change the total revenue recognized for the arrangement. Shipping and handling costs. Our shipping and handling costs charged to customers are included in net revenue, and the associated expense is recorded in cost of products for all periods presented. Deferred revenue. Deferred revenue represents the amount of service and software revenue deferred and recognized over the contractual period or as services are rendered and accepted by the customer. In addition, it includes the amount allocated to undelivered elements in multiple-element arrangements. We limit the revenue recognized to the amount that is not contingent on the future delivery of products or services or meeting other specified performance conditions. Accounts receivable, net. Trade accounts receivable are recorded at the invoiced amount and do not bear interest. Such accounts receivable have been reduced by an allowance for doubtful accounts, which is our best estimate of the amount of probable credit losses in our existing accounts receivable. We determine the allowance based on customer specific experience and the aging of such receivables, among other factors. The allowance for doubtful accounts was approximately $2 million and $3 million as of October 31, 2018 and 2017, respectively. We do not have any off-balance-sheet credit exposure related to our customers. Accounts receivable are also recorded net of estimated product returns. Share-based compensation. We account for share-based awards made to our employees and directors, including restricted stock units, employee stock purchases made under Keysight's Employee Stock Purchase Plan ("Keysight's ESPP"), employee stock option awards, and performance share awards under Keysight Technologies, Inc. Long-Term Performance ("Keysight's LTP") Program, using the estimated grant date fair value method of accounting. We recorded compensation expense for all share-based awards of $59 million in 2018 , $56 million in 2017 and $49 million in 2016 . Inventory. Inventory is valued at standard cost, which approximates actual cost computed on a first-in, first-out basis, not in excess of market value. We assess the valuation of our inventory on a periodic basis and make adjustments to the value for estimated excess and obsolete inventory based on estimates about future demand and actual usage. The excess balance determined by this analysis becomes the basis for our excess inventory charge. Our excess inventory review process includes analysis of sales unit forecasts, managing product rollovers and working with manufacturing to maximize recovery of excess inventory. Warranty. Effective December 1, 2017, the Keysight warranties on products sold through direct sales channels are primarily for one year. Warranties for products sold through distribution channels continue to be primarily for three years. We accrue for standard warranty costs based on historical trends in warranty charges. The accrual is reviewed regularly and periodically adjusted to reflect changes in warranty cost estimates. Estimated warranty charges are recorded within cost of products at the time related product revenue is recognized. See Note 15, "Guarantees." We also sell extended warranties that provide warranty coverage beyond the standard warranty term. Revenue associated with extended warranties is deferred and recognized over the extended coverage period. Loss contingencies. We accrue for probable losses from contingencies, including legal settlement costs, on an undiscounted basis when such costs are considered probable of being incurred and are reasonably estimable. We periodically evaluate available information, both internal and external, relative to such contingencies and adjust this accrual as necessary. Taxes on income. Income tax expense is based on income or loss before taxes. Deferred income taxes reflect the effect of temporary differences between asset and liability amounts that are recognized for financial reporting purposes and the amounts that are recognized for income tax purposes. These deferred taxes are measured by applying currently enacted tax laws. Valuation allowances are recognized to reduce deferred tax assets to the amount that is more likely than not to be realized. We account for uncertainty in income taxes using a two-step approach to recognize and measure uncertain tax positions. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates that it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount that is more than 50 percent likely of being realized upon settlement. We make adjustments to these reserves when facts and circumstances change, such as the closing of a tax audit or the refinement of an estimate due to new information. We classify the liability for unrecognized tax benefits as current to the extent that the company anticipates payment (or receipt) of cash within one year. Interest and penalties related to uncertain tax positions are recognized in the provision for income taxes. Given the number of years and numerous matters that remain subject to examination in various tax jurisdictions, we are unable to estimate the range of possible changes to the balance of our unrecognized tax benefits. Goodwill and other intangible assets. Goodwill is assessed for impairment on a reporting unit basis at least annually in the fourth quarter, as of September 30, or more frequently when events and circumstances occur indicating that the recorded goodwill may be impaired. The impairment test compares the fair value of a reporting unit with its carrying amount, with an impairment charge recorded for the amount by which the carrying amount exceeds the reporting unit’s fair value. We determine fair values for each of the reporting units using the market approach, when available and appropriate, or the income approach, or a combination of both. If multiple valuation methodologies are used, the results are weighted appropriately. Valuations using the market approach are derived from metrics of publicly traded comparable companies. The selections of comparable businesses are based on the markets in which our reporting units operate, giving consideration to risk profiles, size, geography and diversity of products and services. Under the income approach, fair value is determined based on the present value of estimated future cash flows, discounted at an appropriate risk-adjusted rate. We use our internal forecasts to estimate future cash flows and include an estimate of long-term future growth rates based on our most recent views of the long-term outlook for each business. As defined in the authoritative guidance, a reporting unit is an operating segment or one level below an operating segment. During the fourth quarter of 2018, we performed our annual impairment test for all our reporting units. Based on the results of our testing, the fair value of each of our reporting units exceeded the carrying value, except for our Ixia Solutions Group (“ISG”) reporting unit. The primary factors contributing to a reduction in fair value of ISG were weaker-than-expected market growth rates since acquisition and significant integration efforts resulting in lower revenue and profitability trends included in our long-term financial forecasts. As a result, we recorded an impairment loss of $709 million for ISG for the year ended October 31, 2018. There were no impairments of goodwill during the years ended October 31, 2017 and 2016. Refer to Note 3, “Acquisitions,” and Note 10, “Goodwill and Other Intangible Assets,” for additional information about our goodwill and other intangible assets. Other intangible assets consist primarily of developed technologies, proprietary know-how, trademarks, customer relationships, non-compete agreements, and acquired backlog and are amortized using the straight-line method over estimated useful lives ranging from 2 months to 10 years. We review other intangible assets for impairment whenever events or changes in business circumstances indicate that the carrying amount of the assets may not be fully recoverable or that the useful lives of these assets are no longer appropriate. No impairments of purchased intangible assets were recorded during the years ended October 31, 2018, 2017 and 2016. The authoritative accounting guidance allows a qualitative approach for testing indefinite-lived intangible assets for impairment, similar to the impairment testing guidance for goodwill. It allows the option to first assess qualitative factors (events and circumstances) that could have affected the significant inputs used in determining the fair value of the indefinite-lived intangible asset. The qualitative factors assist in determining whether it is more-likely-than-not that the indefinite-lived intangible asset is impaired. An organization may choose to bypass the qualitative assessment for any indefinite-lived intangible asset in any period and proceed directly to calculating its fair value. Our indefinite-lived intangible assets are in-process research and development ("IPR&D") intangible assets. In 2018 and 2017, we assessed impairment by performing a qualitative test and recorded impairment charges of $5 million and $7 million, respectively, related to cancellations of IPR&D projects. There were no impairments in 2016. Advertising. Advertising costs are expensed as incurred and were $21 millio n in 2018 , $22 million in 2017 and $19 million in 2016 . Research and development. Costs related to the research, design and development of our products are charged to research and development expense as they are incurred. Sales taxes. Sales taxes collected from customers and remitted to governmental authorities are not included in our revenue. Investments. Cost method investments, consisting of non-marketable equity securities, are accounted for at historical cost. Trading securities are reported at fair value, with gains or losses resulting from changes in fair value recognized currently in earnings. Investments designated as available-for-sale are reported at fair value, with unrealized gains and losses, net of tax, included in accumulated other comprehensive income. The company assesses investments for impairment whenever events or changes in circumstances indicate that the carrying value of an investment may not be recoverable. There was no impairment recognized in 2018 and 2017. In 2016, cost method investments with a carrying amount of $2 million were written down to their fair value of zero , resulting in an impairment charge of $2 million , which is included in other income (expense). Net income per share. Basic net income per share is computed by dividing net income by the weighted average number of common shares outstanding during the period excluding the dilutive effect of stock options and other employee stock plans. Diluted net income per share gives effect to all potentially dilutive common stock equivalents outstanding during the period. The dilutive effect of share-based awards is reflected in diluted net income per share by application of the treasury stock method, which includes consideration of unamortized share-based compensation expense, and the dilutive effect of in-the-money options and non-vested restricted stock units. Under the treasury stock method, the amount the employee must pay for exercising stock options and unamortized share-based compensation expense are assumed proceeds to be used to repurchase hypothetical shares. Cash, cash equivalents and short term investments. We classify investments as cash equivalents if their original maturity or remaining maturity at the time of purchase is three months or less at the date of purchase. Cash equivalents are stated at cost, which approximates fair value. As of October 31, 2018 , approximately $782 million of our cash and cash equivalents was held outside of the U.S. in our foreign subsidiaries. Under U.S. tax legislation that was enacted on December 22, 2017, certain earnings currently held outside of the U.S. are deemed to be repatriated to the U.S., with foreign cash balances generally subject to an effective U.S. tax rate of 15.5 percent and certain cumulative foreign earnings in excess of foreign cash balances subject to an effective U.S. tax rate of 8 percent . Our cash and cash equivalents mainly consist of short-term deposits held at major global financial institutions, investments in institutional money market funds, and similar short duration instruments with original maturities of 90 days or less. We continuously monitor the creditworthiness of the financial institutions in which we invest our funds. We classify investments as short-term investments if their original maturities are greater than three months and their remaining maturities are one year or less. Restricted cash . As of October 31, 2018, restricted cash of approximately $4 million consisted primarily of deposits held as collateral against bank guarantees, of which $2 million is classified within other current assets and $2 million is classified within other assets in the consolidated balance sheet. As of October 31, 2017, restricted cash of approximately $2 million consisted of deposits held as collateral against bank guarantees and is classified within other assets in the consolidated balance sheet. Fair value of financial instruments. The carrying values of certain of our financial instruments, including cash and cash equivalents, accounts receivable, accounts payable and other accrued liabilities, approximate fair value because of their short maturities. The fair value of long-term equity investments is determined using quoted market prices for those securities when available. For those long-term equity investments accounted for under the cost or equity method, the carrying value approximates estimated fair value. The fair value of our long-term debt, calculated from quoted prices that are primarily Level 1 inputs under the accounting guidance fair value hierarchy, exceeded the carrying value by approximately $3 million and $91 million as of October 31, 2018 and 2017, respectively. The fair value of foreign currency contracts used for hedging purposes is estimated internally by using inputs tied to active markets. These inputs, for example, interest rate yield curves, foreign exchange rates, and forward and spot prices for currencies, are observable in the market or can be corroborated by observable market data for substantially the full term of the assets or liabilities. See also Note 12, "Fair Value Measurements," for additional information on the fair value of financial instruments. Concentration of credit risk. Financial instruments that potentially subject us to significant concentration of credit risk include money market fund investments, time deposits and demand deposit balances. These investments are categorized as cash and cash equivalents and long-term investments. In addition, we have credit risk from derivative financial instruments used in hedging activities and accounts receivable. We invest in a variety of financial instruments and limit the amount of credit exposure with any one financial institution. We have a comprehensive credit policy in place and credit exposure is monitored on an ongoing basis. Credit risk with respect to our accounts receivable is diversified due to the large number of entities comprising our customer base and their dispersion across many different industries and geographies. Credit evaluations are performed on customers requiring credit over a certain amount. Credit risk is mitigated through collateral, such as letters of credit, bank guarantees or payment terms like cash in advance. No single customer accounted for more than 10 percent of accounts receivable as of October 31, 2018 or 2017 . Derivative instruments. We are exposed to global foreign currency exchange rate risk in the normal course of business. We enter into foreign exchange hedging contracts, primarily forward contracts and purchased options to manage financial exposures resulting from changes in foreign currency exchange rates. Foreign currency exposures include committed and anticipated revenue and expense transactions (cash flow exposure) and assets and liabilities that are denominated in currencies other than the functional currency of the subsidiary (balance sheet exposure). For cash flow hedges, contracts are designed at inception as hedges of the related foreign currency exposures. For option contracts, we exclude time value from the measurement of effectiveness. We formally document all relationships between hedging instruments and hedged items, as well as our risk-management objective and strategy for undertaking various hedge transactions at the inception of the hedge. This process includes linking all derivatives that are designated as cash flow hedges to specific forecasted transactions. We also formally assess, both at the hedge’s inception and on an ongoing basis, whether the hedging instruments are highly effective in offsetting changes in cash flows of hedged items. Our foreign exchange hedging contracts generally mature within twelve months. We do not use derivative financial instruments for speculative trading purposes. All derivatives are recognized on the balance sheet at their fair values. For derivative instruments that are designated and qualify as a cash flow hedge, changes in the value of the effective portion of the derivative instrument is recognized in accumulated comprehensive income, a component of stockholders' equity. Amounts associated with cash flow hedges are reclassified and recognized in income when either the forecast transaction occurs or it becomes probable the forecast transaction will not occur. Derivatives not designated as hedging instruments are recorded on the balance sheet at fair value, and changes in fair value are recorded in earnings in the current period. Derivative instruments are subject to master netting arrangements and qualify for net presentation in the balance sheet. Changes in the fair value of the ineffective portion of derivative instruments are recognized in earnings in the current period. Cash flows from derivative instruments are classified in the statement of cash flows in the same category as the cash flows from the hedged or economically hedged item, primarily in operating activities. Property, plant and equipment. Property, plant and equipment are stated at cost less accumulated depreciation. Additions, improvements and major renewals are capitalized; maintenance, repairs and minor renewals are expensed as incurred. When assets are retired or disposed of, the assets and related accumulated depreciation and amortization are removed from our general ledger, and the resulting gain or loss is reflected in the consolidated statement of operations. Buildings and improvements are depreciated over the lesser of their useful lives or the remaining term of the lease and machinery and equipment, which is generally over three to ten years. We use the straight-line method to depreciate assets. Leases. We lease buildings, machinery and equipment under operating leases for original terms ranging generally from one to twenty-five years. Certain leases contain renewal options for periods up to ten years. Capitalized software. We capitalize certain internal and external costs incurred to acquire or create internal use software. Capitalized software is included in property, plant and equipment and is depreciated over three years once development is complete. Impairment of long-lived assets. We continually monitor events and changes in circumstances that could indicate carrying amounts of long-lived assets, including intangible assets, may not be recoverable. When such events or changes in circumstances occur, we assess the recoverability of long-lived assets by determining whether the carrying value of such assets will be recovered through undiscounted expected future cash flows. If the total of the undiscounted future cash flows is less than the carrying amount of those assets, we recognize an impairment loss based on the excess of the carrying amount over the fair value of the assets. Restructuring costs. The main component of our existing restructuring plans is related to workforce reductions. Workforce reduction charges are accrued when payment of benefits becomes probable and the amounts can be estimated. If the amounts and timing of cash flows from restructuring activities are significantly different from what we have estimated, the actual amount of restructuring and other related charges could be materially different, either higher or lower, than those we have recorded. Employee compensation and benefits. Amounts owed to employees, such as accrued salary, bonuses and vacation benefits are reported within employee compensation and benefits in the consolidated balance sheet. The total amount of accrued vacation benefit was $80 million and $72 million as of October 31, 2018 and 2017 , respectively. Foreign currency translation. We translate and remeasure balance sheet and statement of operations items into U.S. dollars. For those subsidiaries that operate in a local currency functional environment, all assets and liabilities are translated into U.S. dollars using current exchange rates at the balance sheet date; revenue and expenses are translated using monthly exchange rates that approximate average exchange rates in effect during each period. Resulting translation adjustments are reported as a separate component of accumulated other comprehensive income (loss) in stockholders' equity. For those subsidiaries that operate in a U.S. dollar functional environment, foreign currency assets and liabilities are re-measured into U.S. dollars at current exchange rates except for non-monetary assets and capital accounts, which are remeasured at historical exchange rates. Revenue and expenses are generally remeasured at monthly exchange rates that approximate average exchange rates in effect during each period. Gains or losses from foreign currenc

NEW ACCOUNTING PRONOUNCEMENTS

NEW ACCOUNTING PRONOUNCEMENTS	12 Months Ended
	Oct. 31, 2018
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
NEW ACCOUNTING PRONOUNCEMENTS	NEW ACCOUNTING PRONOUNCEMENTS Accounting Standards Update ("ASU") 2014-09, Revenue From Contracts With Customers. In May 2014, the Financial Accounting Standards Board ("FASB") issued guidance which will replace numerous requirements in GAAP, including industry-specific requirements, and provide companies with a single revenue recognition model for recognizing revenue from contracts with customers. The core principle of the new standard is that a company should recognize revenue to show the transfer of promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. In July 2015, the FASB deferred the effective date by one year to December 15, 2017 for annual reporting periods beginning after that date. The FASB also permitted early adoption of the standard, but not before the original effective date of December 15, 2016. During 2016, the FASB issued several amendments to the standard, including clarification to the guidance on reporting revenues as a principal versus an agent, identifying performance obligations, accounting for intellectual property licenses, assessing collectability, presentation of sales taxes, impairment testing for contract costs and disclosure of performance obligations. The two permitted transition methods under the new standard are (1) the full retrospective method, in which case the standard would be applied to each prior reporting period presented, and the cumulative effect of applying the standard would be recognized at the earliest period shown, or (2) the modified retrospective method, in which case the cumulative effect of applying the standard would be recognized at the date of initial application. We will adopt the new standard effective November 1, 2018 under the modified retrospective method, by recognizing the cumulative effect of initially applying the new standard as an increase to the opening balance of retained earnings. We expect this adjustment to be approximately $70 million to $80 million , with an immaterial impact to our net income on an ongoing basis. The most significant impact of the standard relates to our accounting for software license revenue, as under the new standard we expect to recognize software license revenue at the time of delivery rather than over the contractual term since control of the software license is transferred and our performance obligation is satisfied at that point in time. The new standard will also require certain costs, primarily sales-related commissions on contracts, to be capitalized rather than expensed. The new standard will also require additional disclosures intended to provide users of financial statements comprehensive information about the nature, amount, timing and uncertainty of revenue and cash flows from customer contracts, including disclosure of judgments used and assets recognized from costs incurred to obtain or fulfill a contract. We are in the process of finalizing changes to our business processes, systems and controls to support recognition and disclosure under the new revenue standard. ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities . In January 2016, the FASB issued guidance that amends various aspects of the recognition, measurement, presentation, and disclosure for financial instruments. The standard generally requires companies to measure investments in other entities, except those accounted for under the equity method, at fair value and recognize any changes in fair value in earnings. We will adopt the standard effective November 1, 2018 under a modified retrospective approach, with prospective adoption for amendments related to equity securities without readily determinable fair values. Our assets and liabilities subject to this standard are not material. ASU 2016-02, Leases. In February 2016, the FASB issued guidance that will require organizations that lease assets to recognize assets and liabilities for leases with lease terms of more than 12 months. Consistent with current GAAP, the recognition, measurement, and presentation of expenses and cash flows arising from a lease by a lessee primarily will depend on its classification as a finance or operating lease. However, unlike current GAAP, which requires only capital leases to be recognized on the balance sheet, the new guidance will require both types of leases to be recognized on the balance sheet. We expect our leases designated as operating leases in Note 16, "Commitments and Contingencies," will be reported in the consolidated balance sheet upon adoption. The standard is effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. Early adoption is permitted. We are evaluating the impact of adopting this guidance on our consolidated financial statements. ASU 2016-09, Improvements to Employee Share-Based Payment Accounting. In March 2016, the FASB issued guidance that amends the accounting for stock-based compensation and requires excess tax benefits and deficiencies to be recognized as a component of income tax expense rather than equity. The inclusion of excess tax benefits and deficiencies as a component of income tax expense will increase volatility within our provision for income taxes as the amount of excess tax benefits or deficiencies from stock-based compensation awards depends on our stock price at the date the awards vest. This guidance also requires excess tax benefits and deficiencies to be presented as an operating activity in the statement of cash flows and allows an entity to make an accounting policy election to either estimate expected forfeitures or to account for them as they occur. We adopted this guidance during the first quarter of 2018 and elected to recognize forfeitures as they occur. As a result, a $6 million cumulative-effect adjustment was recorded directly to retained earnings as of November 1, 2017, the beginning of the annual period of adoption, with a corresponding reduction to deferred tax liabilities. Additionally, we reported an income tax benefit of $5 million for the year ended October 31, 2018 due to recognition of excess tax benefits from share-based compensation. We elected to apply the presentation requirements for cash flows related to excess tax benefits and employee taxes paid for withheld shares retrospectively to all periods presented, which resulted in the following change to our previously reported consolidated statement of cash flows for the years ended October 31, 2017 and 2016: Year Ended October 31, 2017 2016 As Originally As Change As Originally As Change (in millions) Net cash provided by operating activities $ 313 $ 328 $ 15 $ 416 $ 420 $ 4 Net cash provided by/(used in) financing activities $ 1,440 $ 1,425 $ (15 ) $ (25 ) $ (29 ) $ (4 ) ASU 2017-04, Simplifying the Test for Goodwill Impairment. In January 2017, the FASB issued guidance that eliminates the requirement to calculate the implied fair value of goodwill to measure a goodwill impairment charge. Instead, entities will record an impairment charge based on the excess of a reporting unit’s carrying amount over its fair value. The standard is effective for annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Early adoption is permitted. We adopted this guidance during the fourth quarter of 2018. ASU 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. In March 2017, the FASB issued guidance that requires the service cost component of net periodic pension cost and net periodic postretirement benefit cost to be included in operating expenses (together with other employee compensation costs) and the other components of the cost to be presented in the statement of operations separately from the service cost component and outside of income from operations. The standard is effective for annual and interim periods beginning after December 31, 2017, and retrospective application is required. Early adoption is permitted. Had this standard been adopted in prior periods, reported operating profit would have been $48 million and $91 million lower and other income (expense) would have been $48 million and $91 million million higher than reflected in the consolidated statement of operations for the years ended October 31, 2018 and 2017, respectively. ASU 2017-09, Scope of Modification Accounting. In May 2017, the FASB issued guidance that clarifies when changes to the terms or conditions of a share-based payment award must be accounted for as modifications. Specifically, an entity would not apply modification accounting if the fair value, vesting conditions and classification of the awards are the same immediately before and after the modification. The standard is effective for fiscal years beginning after December 31, 2017 and interim periods within those fiscal years. Early adoption is permitted. We do not expect a material impact to our consolidated financial statements due to adoption of this guidance. ASU 2017-12, Targeted Improvements to Accounting for Hedging Activities. In August 2017, the FASB issued guidance to enable entities to better portray the economics of their risk management activities in the financial statements and enhance transparency and understandability of hedge results. The standard is effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. Early adoption is permitted. We currently anticipate adopting this guidance on November 1, 2018 and do not expect a material impact to our consolidated financial statements due to adoption of this guidance. ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. In February 2018, the FASB issued guidance that allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act (the "Act") enacted in December 2017. The standard is effective for fiscal years beginning after December 15, 2018. Early adoption is permitted. We currently anticipate adopting this guidance retrospectively on November 1, 2018. The company maintains a portfolio approach accounting policy related to the income tax effects of accumulated other comprehensive income. We intend to elect to retain the income tax effects of the Act as a component of accumulated other comprehensive income. Given this election, the adoption of this guidance is not expected to have a material impact on our consolidated financial statements. ASU 2018-07, Improvements to Nonemployee Share-Based Payment Accounting. In June 2018, the FASB issued guidance to simplify the accounting for share-based payments to nonemployees by aligning it with the accounting for share-based payments to employees, with certain exceptions. The standard is effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. Early adoption is permitted. We do not expect a material impact to our consolidated financial statements due to adoption of this guidance. ASU 2018-15, Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. In August 2018, the FASB issued guidance that requires a customer in a cloud computing arrangement (i.e., hosting arrangement) that is a service contract to follow the internal-use software guidance to determine which implementation costs to defer and recognize as an asset and aligns the recognition of implementation costs to those incurred in an arrangement that includes an internal-use software license. Further, new disclosures about implementation costs for both internal-use software and hosting arrangements are required. The standard is effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years. Early adoption is permitted. We are evaluating the impact of adopting this guidance on our consolidated financial statements. Other amendments to GAAP that have been issued by the FASB or other standards-setting bodies that do not require adoption until a future date are not expected to have a material impact on our consolidated financial statements upon adoption.

ACQUISITIONS

ACQUISITIONS	12 Months Ended
	Oct. 31, 2018
Business Combinations [Abstract]
ACQUISITION OF ANITE	ACQUISITIONS Acquisition of Ixia On April 18, 2017 , pursuant to the terms of an Agreement and Plan of Merger dated January 30, 2017 , between Keysight and Ixia (the "Merger Agreement"), we acquired all of the outstanding common stock of Ixia for $ 1,622 million , net of $72 million of cash acquired, pursuant to an exchange offer for $19.65 per share (the "Merger Consideration"). Pursuant to the Merger Agreement, any outstanding and unexercised Ixia stock options with an exercise price below the Merger Consideration and any outstanding Ixia restricted stock awards were cancelled and converted into the right to receive a cash payment equal to the merger consideration of $19.65 per share (minus the exercise price for the Ixia stock options). The vested portion of the awards associated with prior service of Ixia employees represented approximately $47 million of the total consideration. We funded the acquisition with a combination of cash and proceeds from debt and equity financings. As a result of the acquisition, Ixia has become a wholly-owned subsidiary of Keysight. Accordingly, the results of Ixia are included in Keysight's consolidated financial statements from the date of the acquisition and are reported in the Ixia Solutions Group operating segment. The Ixia acquisition was accounted for in accordance with the authoritative accounting guidance. The acquired assets and assumed liabilities were recorded by Keysight at their estimated fair values. Keysight determined the estimated fair values with the assistance of appraisals or valuations performed by third party specialists, discounted cash flow analysis, and estimates made by management. We expect to leverage and expand the existing sales channels and product development resources, and utilize the assembled workforce. The company also anticipates opportunities for growth through expanded geographic and customer segment diversity and the ability to leverage additional products and capabilities. These factors, among others, contributed to a purchase price in excess of the estimated fair value of Ixia's net identifiable assets acquired (see summary of net assets below), and, as a result, we have recorded goodwill in connection with this transaction. All goodwill, approximately $48 million of which is deductible for tax purposes, was assigned to the Ixia Solutions Group. A portion of the overall purchase price was allocated to acquired intangible assets. Amortization expense associated with acquired intangible assets is not deductible for tax purposes. Therefore, a deferred tax liability of approximately $186 million was established primarily for the future amortization of these intangibles and is included in "other long-term liabilities" in the table below. The following table summarizes the allocation of the purchase price to the estimated fair values of the assets acquired and liabilities assumed on the closing date of April 18, 2017 (in millions): Cash and cash equivalents $ 72 Short-term investments 44 Accounts receivable 91 Inventory 107 Other current assets 34 Property, plant and equipment 50 Goodwill 1,117 Other intangible assets 744 Other assets 4 Total assets acquired 2,263 Accounts payable (10 ) Employee compensation and benefits (32 ) Deferred revenue (35 ) Income and other taxes payable (1 ) Other accrued liabilities (32 ) Other long-term liabilities (459 ) Net assets acquired $ 1,694 The fair values of cash and cash equivalents, short-term investments, accounts receivable, other current assets, accounts payable, employee compensation and benefits, and other accrued liabilities were generally determined using historical carrying values given the short-term nature of these assets and liabilities. The fair values for acquired inventory, property, plant and equipment, intangible assets, and deferred revenue were determined with the input from third-party valuation specialists. The fair values of certain other assets and certain other liabilities were determined internally using historical carrying values and estimates made by management. Valuation of Intangible Assets Acquired The components of intangible assets acquired in connection with the Ixia acquisition were as follows (in millions): Estimated Fair Value Estimated useful life Developed product technology $ 423 4 years Customer relationships 234 7 years Tradenames and trademarks 12 3 years Backlog 8 90 days Total intangible assets subject to amortization 677 In-process research and development 67 Total intangible assets $ 744 As noted above, the intangible assets were valued with input from valuation specialists using the income approach, which includes the discounted cash flow, cost-savings, and relief from royalty methods. The in-process research and development was valued using the multi-period excess earnings method under the income approach by discounting forecasted cash flows directly related to the products expecting to result from the projects, net of returns on contributory assets. A discount rate of 14% was used to value the research and development projects, adjusted to reflect additional risks inherent in the acquired projects. The primary in-process projects acquired relate to next generation products which will be released in the near future. Total costs to complete for all Ixia in-process research and development were estimated at approximately $12 million as of the close date. Acquisition of ScienLab On August 31, 2017 , we acquired all of the outstanding common stock of ScienLab for $60 million , net of $2 million of cash acquired. ScienLab is a Germany-based company that provides test solutions to automotive original equipment manufacturers and Tier 1 suppliers in the automotive and energy markets. This acquisition complements our portfolio, allowing end-to-end solutions for hybrid electric vehicles, electric vehicles, and battery test solutions that address e-mobility market dynamics. We funded the acquisition using existing cash. As a result of the acquisition, ScienLab has become a wholly-owned subsidiary of Keysight. Accordingly, the results of ScienLab are included in Keysight's consolidated financial statements from the date of the acquisition and are reported in the Electronic Industrial Solutions Group operating segment. For the period from September 1, 2017 to October 31, 2017, ScienLab's net revenue and net loss were $1 million and $2 million , respectively. The ScienLab acquisition was accounted for in accordance with the authoritative accounting guidance. The acquired assets and assumed liabilities were recorded by Keysight at their estimated fair values. Keysight determined the estimated fair values with the assistance of appraisals or valuations performed by third party specialists, discounted cash flow analysis, and estimates made by management. We expect to leverage and expand the existing sales channels and product development resources, and utilize the assembled workforce. The company also anticipates opportunities for growth through expanded geographic and customer segment diversity and the ability to leverage additional products and capabilities. These factors, among others, contributed to a purchase price in excess of the estimated fair value of ScienLab's net identifiable assets acquired (see summary of net assets below), and, as a result, we have recorded goodwill in connection with this transaction. All goodwill was assigned to the Electronic Industrial Solutions Group. We do not expect the goodwill recognized or any potential impairment charges in the future to be deductible for income tax purposes. A portion of the overall purchase price was allocated to acquired intangible assets. Amortization expense associated with acquired intangible assets is not deductible for tax purposes. Therefore, a deferred tax liability of approximately $13 million was established primarily for the future amortization of these intangibles and is included in "other long-term liabilities" in the table below. The following table summarizes the allocation of the purchase price to the estimated fair values of the assets acquired and liabilities assumed on the closing date of August 31, 2017 (in millions): Cash and cash equivalents $ 2 Accounts receivable 3 Inventory 16 Other current assets 1 Goodwill 23 Other intangible assets 40 Total assets acquired 85 Accounts payable (1 ) Deferred revenue (3 ) Income and other taxes payable (2 ) Current portion of long-term debt (1 ) Other long-term liabilities (16 ) Net assets acquired $ 62 The fair values of cash and cash equivalents, accounts receivable, other current assets, accounts payable, deferred revenue, and current portion of long-term debt were generally determined using historical carrying values given the short-term nature of these assets and liabilities. The fair values for acquired inventory and intangible assets were determined with the input from third-party valuation specialists. The fair values of certain other liabilities were determined internally using historical carrying values and estimates made by management. Valuation of Intangible Assets Acquired The components of intangible assets acquired in connection with the ScienLab acquisition were as follows (in millions): Estimated Fair Value Estimated useful life Developed product technology $ 33 6 years Customer relationships 4 5 years Non-compete agreements 1 3 years Tradenames and trademarks 1 3 years Backlog 1 6 months Total intangible assets $ 40 As noted above, the intangible assets were valued with input from valuation specialists using the income approach, which includes the discounted cash flow, cost-savings, and relief from royalty methods. Supplemental Pro Forma Information (Unaudited) The following represents pro forma operating results as if Ixia had been included in the company's consolidated statements of operations as of the beginning of fiscal 2017 and 2016, respectively (in millions, except per share amounts): Year Ended October 31, 2017 2016 Net revenue $ 3,462 $ 3,413 Net income $ 116 $ 231 Net income per share - Basic $ 0.63 $ 1.26 Net income per share - Diluted $ 0.62 $ 1.25 The unaudited pro forma financial information for the years ended October 31, 2017 and 2016 combine the historical results of Keysight and Ixia for the years ended October 31, 2017 and 2016, assuming that the companies were combined as of November 1, 2015. The unaudited pro forma financial information includes business combination accounting effects from the acquisition including amortization and depreciation charges from acquired intangible assets, property plant and equipment, interest expense on the financing transactions used to fund the Ixia acquisition and acquisition-related transaction costs and tax-related effects. Pro forma results of operations for ScienLab have not been presented because the effects of the acquisition were not material to the company’s financial results. The pro forma information as presented above is for informational purposes only and is not indicative of the results of operations that would have been achieved if the acquisition had taken place at the beginning of fiscal 2016 for Ixia.

SHARE-BASED COMPENSATION

SHARE-BASED COMPENSATION	12 Months Ended
	Oct. 31, 2018
Share-based Compensation [Abstract]
SHARE-BASED COMPENSATION	SHARE-BASED COMPENSATION Keysight accounts for share-based awards in accordance with the provisions of the authoritative accounting guidance, which requires the measurement and recognition of compensation expense for all share-based payment awards made to our employees and directors, including Restricted Stock Units ("RSUs"), employee stock purchases made under our Employee Stock Purchase Plan (“ESPP”), employee stock option awards, and performance share awards granted to selected members of our senior management under the Long-Term Performance (“LTP”) Program, based on estimated fair values. Description of Keysight’s Share-Based Plans Incentive compensation plans. The 2014 Equity and Incentive Compensation Plan (the "2014 Stock Plan") was originally adopted by the Board of Directors ("the Board") on July 16, 2014, subsequently amended and restated by the Board on September 29, 2014 and on January 22, 2015 and became effective as of November 1, 2014 (the “Effective Date”). The Board initially reserved 25 million shares of company common stock that may be issued under the 2014 Stock Plan, plus any shares forfeited or cancelled under the 2014 Stock Plan and subsequently reduced the number to 17 million shares. The Plan was further amended and restated by the Board on November 16, 2017 to increase the maximum aggregate number of shares that may be issued under the Plan to 21.8 million shares. The 2014 Stock Plan provides for the grant of awards in the form of stock options, SARs, restricted stock, RSUs, performance shares and performance units with performance-based conditions on vesting or exercisability, and cash awards. The 2014 Stock Plan has a term of ten years . As of October 31, 2018, approximately 9 million shares were available for future awards under the 2014 Stock Plan. Stock options granted under the 2014 Stock Plan may be either "incentive stock options," as defined in Section 422 of the Internal Revenue Code, or non-statutory. Options generally vest at a rate of 25 percent per year over a period of four years from the date of grant and generally have a maximum contractual term of ten years . The exercise price for stock options is generally not less than 100 percent of the fair market value of our common stock on the date the stock award is granted. Effective November 1, 2014, the Compensation Committee of the Board of Directors approved the performance awards, part of the Long-Term Performance (“LTP”) Program administered under the 2014 Stock Plan, for the company's executive officers and other key employees. Participants in this program are entitled to receive unrestricted shares of the company's stock after the end of the contractual period if specified performance targets are met. The maximum contractual period for awards under the performance awards program is three years . These awards can be based on a variety of targets, such as total shareholder return ("TSR") or financial metrics, such as operating margin, cost synergies and others. The final award may vary from zero to 200 percent of the target award based on the actual performance. For TSR-based performance awards, the peer group comparisons are set at the beginning of the performance period. We consider the dilutive impact of this program in our diluted net income per share calculation only to the extent that the performance conditions are met. Restricted stock units under our share-based plans are granted to directors, executives and employees. The estimated fair value of the restricted stock unit awards granted under the 2014 Stock Plan is determined based on the market price of Keysight common stock on the date of grant. Restricted stock units generally vest, with some exceptions, at a rate of 25 percent per year over a period of four years from the date of grant. Effective November 1, 2014, the company adopted the Employee Stock Purchase Plan. The ESPP allows eligible employees to contribute up to ten percent of their base compensation to purchase shares of Keysight common stock at 85 percent of the closing market price at the purchase date. Shares authorized for issuance in connection with the ESPP are subject to an automatic annual increase of the lesser of one percent of the outstanding shares of Keysight common stock on November 1 or an amount determined by the Compensation Committee of our Board of Directors. Under the terms of the ESPP, in no event shall the number of shares issued under the ESPP exceed 75 million shares. Under our ESPP, employees purchased 885,110 shares for $36 million in 2018, 1,085,382 shares for $32 million in 2017 and 1,234,111 shares for $30 million in 2016. As of October 31, 2018, common stock authorized and available for issuance under our ESPP was 21,302,108 shares, which includes shares issued in November 2018 to participants in consideration of the aggregate contribution of $23 million as of October 31, 2018. Impact of Share-based Compensation Awards Share-based compensation expense has been recognized using a straight-line amortization method. The impact of share-based compensation expense on our results was as follows: Year Ended October 31, 2018 2017 2016 (in millions) Cost of products and services $ 11 $ 11 $ 11 Research and development 10 9 8 Selling, general and administrative 38 36 30 Total share-based compensation expense $ 59 $ 56 $ 49 At October 31, 2018 and 2017 no share-based compensation expense was capitalized within inventory. The income tax benefit (deficiency) realized from exercised stock options and similar awards recognized was $5 million in 2018 recorded as a component of income tax expense, $3 million in 2017 and $(5) million in 2016 recorded as a component of equity. Valuation Assumptions The following assumptions were used to estimate the fair value of TSR-based performance awards. Year Ended October 31, 2018 2017 2016 Volatility of Keysight shares 25% 27% 25% Volatility of index/peer group 14% 15% 14%-54% Price-wise correlation with selected peers 57% 57% 38% The TSR-based performance awards were valued using a Monte Carlo simulation model, which requires the use of highly subjective and complex assumptions, including the price volatility of the underlying stock. The estimated fair value of restricted stock awards and the financial metrics-based performance awards is determined based on the market price of Keysight’s common stock on the grant date. We did not grant stock option awards in 2018, 2017 and 2016. The fair value of share-based awards for employee stock options granted before 2016 was estimated using the Black-Scholes option pricing model. Share-based Payment Award Activity Employee Stock Options: The following table summarizes 2018 activity related to stock option awarded to our employees and directors: Options Outstanding Weighted Average Exercise Price (in thousands) Outstanding at October 31, 2017 2,354 $ 27 Granted — $ — Exercised (1,048 ) $ 26 Forfeited and expired — $ — Outstanding at October 31, 2018 1,306 $ 27 There were no forfeited or expired options in 2018. The options outstanding and exercisable at October 31, 2018 were as follows: Options Outstanding Options Exercisable Range of Exercise Prices Number Outstanding Weighted Average Remaining Contractual Life Weighted Average Exercise Price Aggregate Intrinsic Value Number Exercisable Weighted Average Remaining Contractual Life Weighted Average Exercise Price Aggregate Intrinsic Value (in thousands) (in years) (in thousands) (in thousands) (in years) (in thousands) $0 - 25 415 3.1 $ 20 $ 15,505 415 3.1 $ 20 $ 15,505 $25.01 - 30 288 5.1 $ 30 7,836 288 5.1 $ 30 7,836 $30.01 - 40 603 6.0 $ 31 15,740 363 6.0 $ 31 9,476 1,306 4.9 $ 27 $ 39,081 1,066 4.6 $ 26 $ 32,817 The aggregate intrinsic value provided above represents the total pre-tax intrinsic value, based on Keysight's closing stock price of $57.08 at October 31, 2018 , that would have been received by award holders had all award holders exercised their awards that were in-the-money as of that date. The total number of in-the-money awards exercisable at October 31, 2018 was approximately 1.1 million . The following table summarizes the aggregate intrinsic value of options exercised in 2018 , 2017 and 2016 : Aggregate Intrinsic Value Weighted Average Exercise Price (in thousands) Options exercised in fiscal 2016 $ 5,656 $ 19 Options exercised in fiscal 2017 $ 16,385 $ 20 Options exercised in fiscal 2018 $ 28,985 $ 26 As of October 31, 2018 , the unrecognized share-based compensation costs for outstanding stock option awards was zero . See Note 5, "Income Taxes," for the tax impact on share-based award exercises. Non-vested Awards The following table summarizes non-vested award activity in 2018 primarily for our LTP Program and restricted stock unit awards: Shares Weighted Average Grant Date Fair Value (in thousands) Non-vested at October 31, 2017 3,640 $ 33 Granted 1,335 $ 46 Vested (1,354 ) $ 33 Forfeited (155 ) $ 38 LTP Program decremental (107 ) $ 31 Non-vested at October 31, 2018 3,359 $ 36 As of October 31, 2018 , the unrecognized share-based compensation cost for non-vested restricted stock awards was approximately $53 million , which is expected to be amortized over a weighted average period of 2.1 years. The total fair value of restricted stock awards vested was $55 million for 2018, $43 million for 2017 and $33 million for 2016.

INCOME TAXES

INCOME TAXES	12 Months Ended
	Oct. 31, 2018
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The domestic and foreign components of income (loss) before taxes are: Year Ended October 31, 2018 2017 2016 (in millions) U.S. operations $ (532 ) $ (147 ) $ (30 ) Non-U.S. operations 121 326 396 Total income (loss) before taxes $ (411 ) $ 179 $ 366 The provision (benefit) for income taxes is comprised of: Year Ended October 31, 2018 2017 2016 (in millions) U.S. federal taxes: Current $ 131 $ 21 $ (15 ) Deferred 46 (56 ) (13 ) Non-U.S. taxes: Current 75 101 32 Deferred (832 ) 9 28 State taxes, net of federal benefit: Current 7 2 (1 ) Deferred (3 ) — — Total provision (benefit) for income taxes $ (576 ) $ 77 $ 31 Due to the adoption of ASU 2016-09, excess tax benefits and deductions associated with our various share-based award plans are included as components of income tax expense for fiscal year 2018. The income tax provision for fiscal years 2017 and 2016 does not reflect potential future tax savings resulting from excess deductions associated with our various share-based award plans. The significant components of deferred tax assets and deferred tax liabilities included in the consolidated balance sheet are: October 31, 2018 2017 Deferred Tax Assets Deferred Tax Liabilities Deferred Tax Assets Deferred Tax Liabilities (in millions) Inventory $ 14 $ — $ 16 $ (3 ) Intangibles 664 (66 ) 55 (158 ) Property, plant and equipment 14 (23 ) 16 (20 ) Warranty reserves 11 (1 ) 17 (1 ) Pension benefits 47 (67 ) 90 (58 ) Employee benefits, other than retirement 27 (1 ) 29 (1 ) Net operating loss, capital loss, and credit carryforwards 120 — 257 — Unremitted earnings of foreign subsidiaries — (5 ) — (305 ) Share-based compensation 14 — 26 — Deferred revenue 37 (1 ) 24 (3 ) Other 11 (1 ) 10 (10 ) Subtotal 959 (165 ) 540 (559 ) Tax valuation allowance (79 ) — (63 ) — Total deferred tax assets or deferred tax liabilities $ 880 $ (165 ) $ 477 $ (559 ) The increase in 2018 as compared to 2017 for the deferred tax assets primarily relates to the Singapore restructuring completed in 2018 in response to Singapore tax law changes, which resulted in an increase in intangible assets, offset with a decrease in net operating losses and a decrease in future pension liabilities in the U.S. pension. The decrease in 2018 as compared to 2017 for deferred tax liabilities primarily relates to a decrease in U.S. income taxes on the undistributed earnings of foreign subsidiaries due to U.S. tax reform, a decrease in acquired intangibles due to amortization or impairment and a decrease in future pension liabilities in the U.K. Prior to the December 2017 enactment of comprehensive Federal tax legislation commonly known as the Tax Cuts and Jobs Act (the "Tax Act"), we recorded U.S. income taxes on the undistributed earnings of foreign subsidiaries unless the subsidiaries' earnings were considered indefinitely reinvested outside the U.S. As a result of the Tax Act, U.S. income taxes are no longer due when earnings are distributed from foreign subsidiaries, so the deferred taxes on undistributed earnings of foreign subsidiaries has significantly reduced. As of October 31, 2018, there was a deferred tax liability of $5 million for the tax liability expected to be imposed upon the repatriation of unremitted foreign earnings that are not considered indefinitely reinvested. As of October 31, 2018, the cumulative amount of undistributed earnings considered indefinitely reinvested was $91 million . No deferred tax liability has been recognized on the basis difference created by such earnings since it is our intention to indefinitely reinvest those earnings in the company’s foreign operations. The amount of the unrecognized deferred tax liability on the indefinitely reinvested earnings was $4 million . Valuation allowances require an assessment of both positive and negative evidence when determining whether it is more likely than not that deferred tax assets are recoverable. Such assessment is required on a jurisdiction by jurisdiction basis. The $79 million valuation allowance as of October 31, 2018 is mainly related to California research credits, capital losses in the U.K. and net operating losses in the U.K. and Netherlands. The $63 million valuation allowance as of October 31, 2017 was mainly related to capital losses in the U.K., California research credits and net operating losses in the U.K. and Netherlands. The increase in valuation allowance from October 31, 2017 to October 31, 2018 is primarily due to an increase in the valuation allowance on California research credits and U.S. state net operating losses that were acquired in the Ixia acquisition and an increase in the valuation allowance on Netherlands net operating losses. We will maintain a valuation allowance until sufficient positive evidence exists to support reversal. At October 31, 2018, we had U.S. federal net operating loss carryforwards of approximately $11 million, U.S. capital loss carryforwards of approximately $3 million, and U.S. state net operating loss carryforwards, primarily acquired in the Ixia acquisition, of approximately $98 million. The U.S. federal net operating losses will expire in years beginning 2029 through 2036 if not utilized, and the capital loss carryforwards will expire in years beginning in 2022 if not utilized. The U.S. state net operating loss carryforwards will begin to expire in 2019 if not utilized. At October 31, 2018, we had California research credit carryforwards of approximately $23 million. The California research credits can be carried forward indefinitely. The U.S. federal and state net operating losses and tax credit carryforwards are subject to change of ownership limitations provided by the Internal Revenue Code and similar state provisions. At October 31, 2018, we also had foreign net operating loss carryforwards of approximately $508 million, $128 million of which will expire in years beginning 2023 through 2027 if not utilized. The remaining $380 million has an indefinite life. At October 31, 2018, we had foreign capital loss carryforwards of approximately $146 million with an indefinite life and $3 million of tax credits in foreign jurisdictions with an indefinite life. Some of the foreign losses are subject to annual loss limitation rules. These annual loss limitations in foreign jurisdictions may result in the expiration or reduced utilization of the net operating losses. The differences between the U.S. federal statutory income tax rate and our effective tax rate are: Year Ended October 31, 2018 2017 2016 (in millions) Profit before tax times statutory rate $ (96 ) $ 63 $ 128 State income taxes, net of federal benefit 2 1 (1 ) U.S. federal statutory tax rate change 10 — — Non-U.S. income taxed at different rates 16 (83 ) (88 ) Singapore tax incentives and amortization (591 ) — — U.S. transition tax and repatriation of foreign earnings 210 5 (42 ) Foreign earnings not considered indefinitely reinvested 5 3 39 Re-measurement of deferred taxes on foreign earnings not considered indefinitely reinvested (304 ) — — Change in unrecognized tax benefits 86 23 1 U.S. research credits (10 ) (7 ) (5 ) Share-based compensation (1 ) 7 5 Goodwill impairment 99 — — Malaysia tax assessment — 68 — Other, net (2 ) (3 ) (6 ) Provision (benefit) for income taxes $ (576 ) $ 77 $ 31 Effective tax rate 140 % 43 % 8 % We benefit from tax incentives in several jurisdictions, most significantly in Singapore, that have granted us tax incentives that require renewal at various times in the future. The tax incentives provide lower rates of taxation on certain classes of income and require thresholds of investments and employment or specific types of income in those jurisdictions. The Singapore tax incentive is due for renewal in fiscal 2024. The impact of the tax incentives decreased income taxes by $567 million , $49 million and $34 million in 2018, 2017, and 2016, respectively. The benefit of the tax incentives on net income per share (diluted) was approximately $2.97 , $0.27 and $0.20 in 2018, 2017 and 2016, respectively. The increase in the benefit from 2017 to 2018 is primarily due to our Singapore restructuring and tax incentive modifications completed in 2018 in response to Singapore tax law changes. Of the $2.97 benefit of the tax incentives on net income per share (diluted) in 2018, $2.75 of the benefit relates to one-time items from the Singapore restructuring. The increase in the benefit from the tax incentive from 2016 to 2017 is primarily due to an increase in pre-tax book income earned in Singapore. For 2018, the effective tax rate was 140 percent , which is higher than the U.S. statutory rate primarily due to the impact of U.S. tax law changes, the Singapore restructuring and tax incentive modifications completed in 2018 in response to Singapore tax law changes, and the tax impact of goodwill impairment. The impact of the Singapore restructuring includes tax benefits associated with intra-entity asset transfers that were recognized in accordance with ASU 2016-16, Intra-Entity Transfers of Assets Other Than Inventory, which we elected to early adopt effective November 1, 2016. For 2017, the effective tax rate was 43 percent , which is higher than the U.S. statutory rate primarily due to the payment of a prior year Malaysia tax assessment of $68 million, including tax and penalties, which we are currently in the process of appealing to the Special Commissioners of Income Tax (“SCIT”) in Malaysia. For 2016, the effective tax rate was 8 percent , which is lower than the U.S. statutory rate primarily due to a higher percentage of earnings in the non-U.S. jurisdictions taxed at lower statutory tax rates. Also, the tax rate was lower than the U.S. statutory rate due to the net tax benefit of $45 million resulting from the repatriation of earnings from Japan, which includes a U.S. tax expense of $27 million offset by $72 million of foreign tax credits recorded in connection with the repatriation. The breakdown between current and long-term income tax assets and liabilities, excluding deferred tax assets and liabilities, was as follows for the years 2018 and 2017 : October 31, 2018 2017 (in millions) Current income tax assets (included within other current assets) $ 32 $ 40 Current income tax liabilities (included within income and other taxes payable) (18 ) (7 ) Long-term income tax assets (included within other assets) — — Long-term income tax liabilities (included within other long-term liabilities) (205 ) (39 ) Total $ (191 ) $ (6 ) The calculation of our tax liabilities involves uncertainties in the application of complex tax law and regulations in a multitude of jurisdictions. Although the guidance on the accounting for uncertainty in income taxes prescribes the use of a recognition and measurement model, the determination of whether an uncertain tax position has met those thresholds will continue to require significant judgment by management. In accordance with the guidance on the accounting for uncertainty in income taxes, for all U.S. and other tax jurisdictions, we recognize potential liabilities for anticipated tax audit issues based on our estimate of whether, and the extent to which, additional taxes and interest will be due. The ultimate resolution of tax uncertainties may differ from what is currently estimated, which could result in a material impact on income tax expense. If our estimate of income tax liabilities proves to be less than the ultimate assessment, a further charge to expense would be required. If events occur and the payment of these amounts ultimately proves to be unnecessary, the reversal of the liabilities would result in tax benefits being recognized in the period when we determine the liabilities are no longer necessary. The aggregate changes in the balances of our unrecognized tax benefits including all federal, state and foreign tax jurisdictions are as follows: 2018 2017 2016 (in millions) Balance, beginning of year $ 146 $ 51 $ 50 Additions due to acquisition — 22 — Additions for tax positions related to the current year 93 31 5 Additions for tax positions from prior years 2 52 1 Reductions for tax positions from prior years (1 ) (9 ) (4 ) Settlements with taxing authorities (12 ) — — Statute of limitations expirations (1 ) (1 ) (1 ) Balance, end of year $ 227 $ 146 $ 51 As of October 31, 2018, we had $249 million of unrecognized tax benefits, including interest and penalties that, if recognized, would affect our effective tax rate. However, approximately $1 million of the unrecognized tax benefits were related to state income tax positions that, if recognized, would be in the form of a deferred tax asset that would likely not affect our effective tax rate due to a valuation allowance. We recognized tax expense of $2 million , $18 million , and $1 million of interest and penalties related to unrecognized tax benefits in 2018, 2017 and 2016, respectively. Cumulatively, interest and penalties accrued as of the end of October 31, 2018, 2017 and 2016 were $22 million , $20 million and $2 million , respectively. The increase in interest and penalties from October 31, 2016 to October 31, 2017 is primarily due to $18 million of penalties paid for the Malaysia tax assessment relating to the 2008 tax year. The open tax years for the IRS and most states are from November 1, 2014 through the current tax year. For the majority of our foreign entities, the open tax years are from August 1, 2014 through the current tax year. For certain foreign entities, the tax years remain open, at most, back to the year 2007 . Given the number of years and numerous matters that remain subject to examination in various tax jurisdictions, we are unable to estimate the range of possible changes to the balance of our unrecognized tax benefits. The company is being audited in Malaysia for the 2008 tax year. Although this tax year pre-dates our spin-off from Agilent, pursuant to the agreement between Agilent and Keysight pertaining to tax matters, as finalized at the time of separation, for certain entities including Malaysia, any historical tax liability is the responsibility of Keysight. In the fourth quarter of fiscal 2017, Keysight paid income taxes and penalties of $68 million on gains related to intellectual property rights, although we are currently in the process of appealing to the Special Commissioners of Income Tax (“SCIT”) in Malaysia. The company believes there are numerous defenses to the current assessment; the statute of limitations for the 2008 tax year in Malaysia is closed and the income in question is exempt from tax in Malaysia. The company is disputing this assessment and pursuing all avenues to resolve this issue favorably for the company.

NET INCOME PER SHARE

NET INCOME PER SHARE	12 Months Ended
	Oct. 31, 2018
Earnings Per Share [Abstract]
NET INCOME PER SHARE	NET INCOME PER SHARE The following is a reconciliation of the numerator and denominator of the basic and diluted net income per share computations. Year Ended October 31, 2018 2017 2016 (in millions) Numerator: Net income $ 165 $ 102 $ 335 Denominator: Basic weighted-average shares 187 180 170 Potential common shares— stock options and other employee stock plans 4 2 2 Diluted weighted-average shares 191 182 172 The dilutive effect of share-based awards is reflected in diluted net income per share by application of the treasury stock method, which includes consideration of unamortized share-based compensation expense and the dilutive effect of in-the-money options and non-vested restricted stock units. Under the treasury stock method, the amount the employee must pay for exercising stock options and unamortized share-based compensation expense are collectively assumed to be used to repurchase hypothetical shares. The increase in diluted weighted average shares for the years ended October 31, 2018 and October 31, 2017 includes 5 million and 8 million shares, respectively, attributed to the weighted impact of 13 million shares of common stock issued in March 2017. We exclude stock options with exercise prices greater than the average market price of our common stock from the calculation of diluted earnings per share because their effect would be anti-dilutive. For the year ended 2018, 2017 and 2016, we excluded zero shares, zero shares and 1.7 million shares, respectively, from the calculation of diluted earnings per share. In addition, we also exclude from the calculation of diluted earnings per share, stock options, ESPP, LTP Program and restricted stock awards, whose combined exercise price, unamortized fair value and excess tax benefits collectively were greater than the average market price of our common stock because their effect would also be anti-dilutive. For the years ended October 31, 2018, 2017 and 2016, we excluded 2,803 shares, 7,760 shares and 26,200 shares, respectively, from the calculation of diluted earnings per share.

SUPPLEMENTAL CASH FLOW INFORMAT

SUPPLEMENTAL CASH FLOW INFORMATION	12 Months Ended
	Oct. 31, 2018
Supplemental Cash Flow Information [Abstract]
SUPPLEMENTAL CASH FLOW INFORMATION	SUPPLEMENTAL CASH FLOW INFORMATION Net cash paid for income taxes was $27 million in 2018 , $121 million in 2017 and $23 million in 2016 . The 2017 payments include $68 million paid to the Malaysia tax authority associated with a tax assessment on gains related to intellectual property transfers that we are currently in the process of appealing to the Special Commissioners of Income Tax in Malaysia. Cash paid for interest was $79 million in 2018, $64 million in 2017 and $44 million in 2016. In 2017, we also paid fees of $9 million in connection with a bridge loan facility that were amortized to interest expense and classified as a financing activity in our consolidated statement of cash flows. The following table summarizes our non-cash investing activities that are not reflected in the consolidated statement of cash flows: Year Ended October 31, 2018 2017 2016 (in millions) Non-cash investing activities: Increase (decrease) in unpaid capital expenditures $ 10 $ (4 ) $ (11 ) Increase in capital lease liabilities — 4 1 $ 10 $ — $ (10 )

INVENTORY

INVENTORY	12 Months Ended
	Oct. 31, 2018
Inventory, Net [Abstract]
INVENTORY	INVENTORY October 31, 2018 2017 (in millions) Finished goods $ 283 $ 286 Purchased parts and fabricated assemblies 336 302 Total inventory $ 619 $ 588 Inventory-related excess and obsolescence charges recorded in total cost of products were $25 million in 2018 , $16 million in 2017 and $17 million in 2016 . In 2018, excess and obsolete inventory-related charges includes $7 million due to divestiture-related activity. We record excess and obsolete inventory charges for inventory at our sites as well as inventory at our contract manufacturers and suppliers, where we have non-cancellable purchase commitments.

PROPERTY, PLANT AND EQUIPMENT,

PROPERTY, PLANT AND EQUIPMENT, NET	12 Months Ended
	Oct. 31, 2018
Property, Plant and Equipment, Net [Abstract]
PROPERTY, PLANT AND EQUIPMENT, NET	PROPERTY, PLANT AND EQUIPMENT, NET October 31, 2018 2017 (in millions) Land $ 63 $ 63 Buildings and leasehold improvements 695 678 Machinery and equipment 1,074 1,008 Total property, plant and equipment 1,832 1,749 Accumulated depreciation and amortization (1,277 ) (1,219 ) Property, plant and equipment, net $ 555 $ 530 Asset impairments were zero in 2018, 2017 and 2016. Depreciation expense was $103 million in 2018 , $92 million in 2017 and $85 million in 2016 . Buildings and leasehold improvements include assets held under capital lease of $4 million and $4 million at October 31, 2018 and 2017, respectively. In 2014 we entered into a binding contract to sell land in the United Kingdom that resulted in the transfers of three separate land tracts from 2014 through 2017 totaling approximately $34 million . In 2017 and 2016, we recognized gains of $8 million and $10 million , respectively, on the sale of the land tracts in other operating expense (income).

GOODWILL AND OTHER INTANGIBLE A

GOODWILL AND OTHER INTANGIBLE ASSETS	12 Months Ended
	Oct. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND OTHER INTANGIBLE ASSETS	GOODWILL AND OTHER INTANGIBLE ASSETS The goodwill balances as of October 31, 2018 , 2017 and 2016 and the movements in 2018 and 2017 for each of our reportable segments were as follows: Communications Solutions Group Electronic Industrial Solutions Group Ixia Solutions Group Services Solutions Group Total (in millions) Goodwill at October 31, 2016 $ 456 $ 216 $ — $ 64 $ 736 Foreign currency translation impact (15 ) 1 — 1 (13 ) Goodwill arising from acquisitions — 23 1,117 19 1,159 Goodwill at October 31, 2017 441 240 1,117 84 1,882 Foreign currency translation impact (2 ) (2 ) (1 ) — (5 ) Goodwill arising from acquisitions — — — 6 6 Impairment losses — — (709 ) — (709 ) Divestitures (2 ) (1 ) — — (3 ) Balance at October 31, 2018 $ 437 $ 237 $ 407 $ 90 $ 1,171 Goodwill $ 437 $ 237 $ 1,116 $ 90 $ 1,880 Accumulated impairment losses — — (709 ) — (709 ) Balance at October 31, 2018 $ 437 $ 237 $ 407 $ 90 $ 1,171 Other intangible assets as of October 31, 2018 and 2017 consisted of the following: Other Intangible Assets as of October 31, 2018 Other Intangible Assets as of October 31, 2017 Gross Carrying Amount Accumulated Amortization and Impairments Net Book Value Gross Carrying Amount Accumulated Amortization and Impairments Net Book Value (in millions) Developed technology $ 835 $ 415 $ 420 $ 808 $ 252 $ 556 Backlog 13 13 — 13 12 1 Trademark/Tradename 33 14 19 33 8 25 Customer relationships 304 100 204 304 61 243 Non-compete agreements 1 — 1 1 — 1 Total amortizable intangible assets 1,186 542 644 1,159 333 826 In-Process R&D 1 — 1 29 — 29 Total $ 1,187 $ 542 $ 645 $ 1,188 $ 333 $ 855 In 2018, we recorded additions to goodwill of $6 million due to an acquisition and a $3 million reduction due to divestiture-related activity. There was $1 million foreign exchange translation impact to other intangible assets in 2018. In 2018, we transferred $23 million from in-process R&D to developed technology as projects were successfully completed and recorded an impairment charge of $5 million related to the cancellation of an in-process R&D project. In 2017, we recorded additions to goodwill and other intangible assets of $1,159 million and $785 million , respectively, due to the acquisition of Ixia and other acquisitions. There was no foreign exchange translation impact to other intangible assets in 2017. In 2017, we transferred $43 million from in-process R&D to developed technology as projects were successfully completed and recorded an impairment charge of $7 million related to the cancellation of an in-process R&D project. Amortization of other intangible assets was $204 million in 2018, $131 million in 2017, and $43 million in 2016. Future amortization expense related to existing finite-lived purchased intangible assets is estimated to be $203 million in 2019, $196 million in 2020, $128 million in 2021, $52 million in 2022, $44 million in 2023, and $21 million thereafter. We test goodwill for impairment annually in the fourth quarter of each year, after the annual update to our long-term financial forecasts during our strategic planning cycle, using data as of September 30 of that year. The impairment test compares the fair value of a reporting unit with its carrying amount, with an impairment charge recorded for the amount by which the carrying amount exceeds the reporting unit’s fair value. We determine fair values for each of the reporting units using the market approach, when available and appropriate, or the income approach, or a combination of both. If multiple valuation methodologies are used, the results are weighted appropriately. Valuations using the market approach are derived from metrics of publicly traded comparable companies. The selections of comparable businesses are based on the markets in which our reporting units operate, giving consideration to risk profiles, size, geography, and diversity of products and services. Under the income approach, fair value is determined based on the present value of estimated future cash flows, discounted at an appropriate risk-adjusted rate. We use our internal forecasts to estimate future cash flows and include an estimate of long-term future growth rates based on our most recent views of the long-term outlook for each business. During the fourth quarter of 2018, we performed our annual impairment test of goodwill for all our reporting units using a qualitative approach, except for our Ixia Solutions Group ("ISG") reporting unit, for which the test was performed using a quantitative approach since their revenue and earnings have not been consistent with originally projected results, thus requiring a reduction of our long-term financial forecasts included in our revised strategic plan. The income and market approaches were used to determine the fair value of the ISG reporting unit. With respect to the income approach, the discounted cash flow method was used, which included an eight year future cash flow projection and an estimated terminal value. The market approach used revenue and EBITDA multiples to develop an estimate of fair value. A weighting of 60 percent and 40 percent was applied to the income and market approaches, respectively, to determine the fair value of the ISG reporting unit. The income approach was applied a larger weighting based on the underlying detailed financial projections prepared during the strategic planning cycle which reflect the financial and operational facts and circumstances specific to ISG as of the valuation date. Based on the results of our testing, the fair value of our ISG reporting unit did not exceed the carrying value. The primary factors contributing to a reduction in fair value of ISG were weaker-than-expected market growth rates since acquisition and significant integration efforts in the current year resulting in lower revenue and profitability trends included in our long-term financial forecasts. As a result, we recorded an impairment loss of $709 million for ISG. As of October 31, 2018, we believe that no other goodwill impairment exists based on the qualitative approach, apart from the impairment charge discussed above, and that the remaining goodwill is recoverable for all of our reporting units; however, there can be no assurance that additional goodwill will not be impaired in future periods. Estimating the fair value of reporting units requires the use of estimates and significant judgments that are based on a number of factors including actual operating results. It is reasonably possible that the judgments and estimates described above could change in future periods. We review long-lived assets for impairment whenever events or changes in business circumstances indicate that the carrying amount of the assets may not be fully recoverable or that the useful lives of these assets are no longer appropriate. As a result of our revised strategic plan, we performed an impairment test of ISG's intangible assets and concluded that no impairment charge was required.

INVESTMENTS

INVESTMENTS	12 Months Ended
	Oct. 31, 2018
Investments, Debt and Equity Securities [Abstract]
INVESTMENTS	INVESTMENTS Net book value of investments as of October 31, 2018 and 2017 were as follows: October 31, 2018 2017 (in millions) Long-Term Cost method investments $ 16 $ 16 Trading securities 13 13 Available-for-sale investments 17 34 Total $ 46 $ 63 Cost method investments consist of non-marketable equity securities and are accounted for at historical cost. Trading securities are reported at fair value, with gains or losses resulting from changes in fair value recognized currently in earnings. Investments designated as available-for-sale consists of equity securities and are reported at fair value, with unrealized gains and losses, net of tax, included in accumulated other comprehensive income (loss). Investments in available-for-sale securities at estimated fair value were as follows: October 31, 2018 October 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (in millions) Long-Term Equity securities $ 15 $ 2 $ — $ 17 $ 15 $ 19 $ — $ 34 All of our investments, excluding trading securities, are subject to periodic impairment review. The impairment analysis requires significant judgment to identify events or circumstances that would likely have a significant adverse effect on the future value of the investment. We consider various factors in determining whether an impairment is other-than-temporary, including the severity and duration of the impairment, forecasted recovery, the financial condition and near-term prospects of the investee, and our ability and intent to hold the investment for a period of time sufficient to allow for any anticipated recovery in market value. There was no impairment recognized in the years ended 2018 and 2017. In 2016, cost method investments with a carrying amount of $2 million were written down to their fair value of zero , resulting in an impairment charge of $2 million , which is included in other income (expense). Realized gains or losses on the sale of available-for-sale or cost method securities were zero in 2018, 2017 and 2016. Net unrealized gains on our trading securities portfolio was zero in 2018 , $2 million in 2017 and zero in 2016 .

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS	12 Months Ended
	Oct. 31, 2018
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	FAIR VALUE MEASUREMENTS The authoritative guidance defines fair value as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities required or permitted to be recorded at fair value, we consider the principal or most advantageous market and assumptions that market participants would use when pricing the asset or liability. Fair Value Hierarchy The guidance establishes a fair value hierarchy that prioritizes inputs used in valuation techniques into three levels. A financial instrument's categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. There are three levels of inputs that may be used to measure fair value: Level 1 — applies to assets or liabilities for which there are quoted prices in active markets for identical assets or liabilities. Level 2 — applies to assets or liabilities for which there are inputs other than quoted prices included within Level 1 that are observable, either directly or indirectly, for the asset or liability such as: quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in less active markets; or other inputs that can be derived principally from, or corroborated by, observable market data. Level 3 — applies to assets or liabilities for which there are unobservable inputs to the valuation methodology that are significant to the measurement of the fair value of the assets or liabilities. Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis Financial assets and liabilities measured at fair value on a recurring basis as of October 31, 2018 and 2017 were as follows: Fair Value Measurements as of October 31, 2018 Fair Value Measurements as of October 31, 2017 Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 (in millions) Assets: Short-term Cash equivalents Money market funds $ 484 $ 484 $ — $ — $ 403 $ 403 $ — $ — Derivative instruments (foreign exchange contracts) 6 — 6 — 6 — 6 — Long-term Trading securities 13 13 — — 13 13 — — Available-for-sale investments 17 17 — — 34 34 — — Total assets measured at fair value $ 520 $ 514 $ 6 $ — $ 456 $ 450 $ 6 $ — Liabilities: Short-term Derivative instruments (foreign exchange contracts) $ 6 $ — $ 6 $ — $ 1 $ — $ 1 $ — Long-term Deferred compensation liability 13 — 13 — 13 — 13 — Total liabilities measured at fair value $ 19 $ — $ 19 $ — $ 14 $ — $ 14 $ — Our money market funds, trading securities, and available-for-sale investments are generally valued using quoted market prices and therefore are classified within Level 1 of the fair value hierarchy. Our deferred compensation liability is classified as Level 2 because the inputs used in the calculations are observable, although the values are not directly based on quoted market prices. Our derivative financial instruments are classified within Level 2, as there is not an active market for each hedge contract, but the inputs used to calculate the value of the instruments are tied to active markets. Trading securities (which are earmarked to pay the deferred compensation liability) and deferred compensation liability are reported at fair value, with gains or losses resulting from changes in fair value recognized currently in earnings. Investments designated as available-for-sale and certain derivative instruments are reported at fair value, with unrealized gains and losses, net of tax, included in accumulated other comprehensive income (loss). Realized gains and losses from the sale of these instruments are recorded in earnings. Financial Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis Assets measured at fair value on a non-recurring basis consisted of goodwill and intangible assets for our Ixia Solutions Group reporting unit. Refer to Note 10, "Goodwill and Other Intangible Assets" for more information. Goodwill Fair value assessments of the reporting unit and the reporting unit's net assets, which are performed for goodwill impairments tests, are considered Level 3 measurements due to the significance of unobservable inputs developed using company-specific information. We considered a market approach as well as an income approach using the discounted cash flow model to determine the fair value of the reporting unit. Intangible Assets We utilized an income approach for estimating the fair value of intangible assets. The future cash flows used in the analysis are based on internal cash flow projections based on our long-range plans and include significant assumptions by management. Accordingly, the fair value assessment of the long-lived asses is considered a Level 3 fair value measurement.

DERIVATIVES

DERIVATIVES	12 Months Ended
	Oct. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVES	DERIVATIVES We are exposed to foreign currency exchange rate fluctuations and interest rate changes in the normal course of our business. As part of risk management strategy, we use derivative instruments, primarily forward contracts and purchased options to hedge economic and/or accounting exposures resulting from changes in foreign currency exchange rates. Cash Flow Hedges We enter into foreign exchange contracts to hedge our forecasted operational cash flow exposures resulting from changes in foreign currency exchange rates. These foreign exchange contracts, carried at fair value, have maturities between one and twelve months. These derivative instruments are designated and qualify as cash flow hedges under the criteria prescribed in the authoritative guidance. The changes in the value of the effective portion of the derivative instrument are recognized in accumulated other comprehensive income. Amounts associated with cash flow hedges are reclassified to cost of sales in the consolidated statement of operations when the forecasted transaction occurs. If it becomes probable that the forecasted transaction will not occur, the hedge relationship will be de-designated and amounts accumulated in other comprehensive income will be reclassified to other income (expense) in the current period. Changes in the fair value of the ineffective portion of derivative instruments are recognized in earnings in the consolidated statement of operations in the current period. We record the premium paid (time value) of an option on the date of purchase as an asset. For options designated as cash flow hedges, changes in the time value are excluded from the assessment of hedge effectiveness and are recognized in other income (expense) over the life of the option contract. The ineffectiveness for the years ended October 31, 2018, 2017 and 2016 was not significant . Other Hedges Additionally, we enter into foreign exchange contracts to hedge monetary assets and liabilities that are denominated in currencies other than the functional currency of our subsidiaries. These foreign exchange contracts are carried at fair value and do not qualify for hedge accounting treatment and are not designated as hedging instruments. Changes in value of the derivative are recognized in other income (expense) in the consolidated statement of operations, in the current period, along with the offsetting foreign currency gain or loss on the underlying assets or liabilities. Our use of derivative instruments exposes us to credit risk to the extent that the counterparties may be unable to meet the terms of the agreement. We do, however, seek to mitigate such risks by limiting our counterparties to major financial institutions which are selected based on their credit ratings and other factors. We have established policies and procedures for mitigating credit risk that include establishing counterparty credit limits, monitoring credit exposures, and continually assessing the creditworthiness of counterparties. A number of our derivative agreements contain threshold limits to the net liability position with counterparties and are dependent on our corporate credit rating determined by the major credit rating agencies. The counterparties to the derivative instruments may request collateralization, in accordance with derivative agreements, on derivative instruments in net liability positions. The aggregate fair value of all derivative instruments with credit-risk-related contingent features that were in a net liability position as of October 31, 2018 was $4 million. The credit-risk-related contingent features underlying these agreements had not been triggered as of October 31, 2018 . There were 159 foreign exchange forward contracts open as of October 31, 2018 and designated as cash flow hedges. There were 63 foreign exchange forward contracts and zero foreign exchange option contract open as of October 31, 2018 not designated as hedging instruments. The aggregated notional amounts by currency and designation as of October 31, 2018 were as follows: Derivatives in Derivatives Not Designated as Hedging Instruments Forward Contracts Forward Contracts Currency Buy/(Sell) Buy/(Sell) (in millions) Euro $ 14 $ 95 British Pound — (28 ) Singapore Dollar 15 1 Malaysian Ringgit 79 1 Japanese Yen (86 ) (1 ) Other currencies 3 6 $ 25 $ 74 Derivative instruments are subject to master netting arrangements and are disclosed gross in the consolidated balance sheet. The gross fair values and balance sheet presentation of derivative instruments held as of October 31, 2018 and 2017 were as follows: Fair Values of Derivative Instruments Asset Derivatives Liability Derivatives Fair Value Fair Value Balance Sheet Location October 31, October 31, Balance Sheet Location October 31, October 31, (in millions) Derivatives designated as hedging instruments: Cash flow hedges Foreign exchange contracts Other current assets $ 5 $ 5 Other accrued liabilities $ 4 $ — Derivatives not designated as hedging instruments: Foreign exchange contracts Other current assets 1 1 Other accrued liabilities 2 1 Total derivatives $ 6 $ 6 $ 6 $ 1 The effect of derivative instruments for foreign exchange contracts designated as hedging instruments and not designated as hedging instruments in our consolidated statement of operations was as follows: 2018 2017 2016 (in millions) Derivatives designated as hedging instruments: Cash flow hedges Foreign exchange contracts: Gain (loss) recognized in accumulated other comprehensive income $ — $ 6 $ (7 ) Gain (loss) reclassified from accumulated other comprehensive income into cost of products $ 4 $ (1 ) $ (12 ) Derivatives not designated as hedging instruments: Gain (loss) recognized in other income (expense), net $ 4 $ 6 $ (10 ) The estimated amount of net gain at October 31, 2018 expected to be reclassified from accumulated other comprehensive income to cost of products within the next twelve months is zero .

RETIREMENT PLANS AND POST RETIR

RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS	12 Months Ended
	Oct. 31, 2018
Defined Benefit Plan [Abstract]
RETIREMENT PLANS AND POST-RETIREMENT PENSION PLANS	RETIREMENT PLANS AND POST-RETIREMENT BENEFIT PLANS General. The majority of our employees are covered under various defined benefit and/or defined contribution retirement plans. Additionally, we sponsor post-retirement health care benefits for our eligible U.S. employees. We provide U.S. employees, who meet eligibility criteria under the Keysight Technologies, Inc. Retirement Plan ("RP"), defined benefits which are based on an employee's base or target pay during the years of employment and on length of service. For eligible employees' service through October 31, 1993, the benefit payable under the RP is reduced by any amounts due to the eligible employees' service under our defined contribution Deferred Profit-Sharing Plan ("DPSP"), which was closed to new participants as of November 1993. In addition, in the U.S. we maintain the Supplemental Benefits Retirement Plan ("SBRP"), a supplemental unfunded non-qualified defined benefit plan to provide benefits that would be provided under the RP but for limitations imposed by the Internal Revenue Code. The RP and the SBRP comprise the "U.S. Plans." As of October 31, 2018 , the fair value of plan assets of the DPSP for U.S. employees was $268 million . The obligation for the DPSP eligible employees equals the fair value of the DPSP assets due to the benefit payable under the RP being the greater of the RP and DPSP. Eligible employees outside the U.S. generally receive retirement benefits under various retirement plans ("Non-U.S. Plans") based on factors such as years of service and/or employee compensation levels. Eligibility is generally determined in accordance with local statutory requirements. 401(k) defined contribution plan . Eligible U.S. employees may participate in the Keysight Technologies, Inc. 401(k) Plan (the "401(k) Plan"). Enrollment in the 401(k) Plan is automatic for employees who meet eligibility requirements unless they decline participation. Under the 401(k) Plan, we provide matching contributions to employees up to a maximum of 4 percent of an employee's annual eligible compensation. The maximum contribution to the 401(k) Plan is 50 percent of an employee's annual eligible compensation, subject to regulatory limitations. Employees hired on or after August 1, 2015 are not eligible to participate in the RP or the U.S. Post-Retirement Benefit Plan. We provide matching contributions to these employees under the 401(k) Plan up to a maximum of 6 percent of the employee's annual eligible compensation. The 401(k) Plan employer expense included in income from operations was $23 million in 2018, $16 million in 2017 and $14 million in 2016. Post-retirement medical benefit plans. In addition to receiving retirement benefits, U.S. employees who meet eligibility requirements as of their termination date may participate in the Keysight Technologies, Inc. Health Plan for Retirees ("U.S. Post-Retirement Benefit Plan"). Eligible retirees who were less than age 50 as of January 1, 2005 and who retire after age 55 with 15 or more years of service (age 54 with 14 or more years of service for workforce managed terminations) are eligible for a fixed amount that can be utilized to pay for premiums under a Keysight sponsored pre-Medicare medical plan, non-Keysight sponsored medical, dental and vision plans purchased in the individual insurance market, as well as Medicare Part A, Medicare Part B, prescription drug premiums, and eligible premiums paid for coverage under another employer's retiree medical, retiree vision and retiree dental plan provided such premiums were not paid on a pre-tax basis. Eligible retirees who were at least age 50 as of January 1, 2005 and who retire after age 55 with 15 or more years of service (age 54 with 14 or more years of service for workforce managed terminations) currently choose from managed-care or indemnity options, with the company subsidization level or stipend dependent on a number of factors, including eligibility and length of service. Grandfathered retirees receive a fixed monthly subsidy toward pre- 65 premium costs (subsidy capped at 2011 levels) and a fixed monthly stipend post- 65 . The subsidy amounts will not increase. Components of net periodic benefit cost. The company uses alternate methods of amortization, as allowed by the authoritative guidance, which amortizes the actuarial gains and losses on a consistent basis for the years presented. For the U.S. Plans, gains and losses are amortized over the average future working lifetime. For most Non-U.S. Plans and the U.S. Post-Retirement Benefit Plan, gains and losses are amortized using a separate layer for each year's gains and losses. On October 26, 2018, the High Court of Justice in the United Kingdom (the "High Court") ruled that Lloyds Bank plc was required to equalize benefits payable to men and women under its U.K. defined benefit pension plans by amending those plans to increase the pension benefits payable to participants that accrued such benefits during the period from 1990 to 1997. The inequalities arose from statutory differences in the retirement ages and rates of accrual of benefits for men and women related to Guaranteed Minimum Pension ("GMP") benefits that are included in U.K. defined benefit pension plans. We are evaluating the applicability of the High Court's ruling to our U.K. defined benefit pension plans. As of October 31, 2018, no amounts have been recorded as specifics related to these calculations have been deferred to future hearings. Our estimate of the potential impact is less than 1 percent of the projected benefit obligation and is not material to our financial statements. On December 15, 2016, we transferred a portion of the assets and obligations of our Japanese Employees’ Pension Fund ("EPF") to the Japanese government. The remaining portion of the EPF was transferred to a new Keysight Japan corporate defined benefit pension plan. The difference between the obligations settled with the government of $142 million and the assets transferred to the government of $51 million resulted in an increase in the funded status of the new defined benefit pension plan of $91 million . The settlement resulted in a gain of $68 million which is included in other operating expense (income) in the consolidated statement of operations. Previously accrued salary progression of $4 million was derecognized at the time of settlement. For the years ended October 31, 2018 , 2017 and 2016 , components of net periodic benefit cost (benefit) and other amounts recognized in other comprehensive income were comprised of: Defined Benefit Plans U.S. Post-Retirement Benefit Plan U.S. Plans Non-U.S. Plans 2018 2017 2016 2018 2017 2016 2018 2017 2016 (in millions) Net periodic benefit cost (benefit) Service cost — benefits earned during the period $ 24 $ 22 $ 21 $ 14 $ 18 $ 19 $ 1 $ 1 $ 1 Interest cost on benefit obligation 25 21 22 23 23 32 7 7 9 Expected return on plan assets (37 ) (33 ) (37 ) (85 ) (74 ) (74 ) (13 ) (11 ) (14 ) Amortization: Net actuarial loss 12 15 9 25 33 27 16 21 20 Prior service credit (7 ) (8 ) (7 ) (1 ) (1 ) (1 ) (14 ) (15 ) (17 ) Net periodic benefit cost (benefit) 17 17 8 (24 ) (1 ) 3 (3 ) 3 (1 ) Curtailments and settlements — — — 1 (69 ) — — — — Net periodic benefit cost (benefit) $ 17 $ 17 $ 8 $ (23 ) $ (70 ) $ 3 $ (3 ) $ 3 $ (1 ) Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss Net actuarial loss (gain) $ (11 ) $ 4 $ 60 $ 41 $ (145 ) $ 188 $ (1 ) $ (16 ) $ 5 Amortization: Net actuarial loss (12 ) (15 ) (9 ) (25 ) (33 ) (27 ) (16 ) (21 ) (20 ) Prior service credit 7 8 7 1 1 1 14 15 17 Settlement — — — (1 ) (24 ) — — — — Curtailment — — — — 1 — — — — Foreign currency — — — (5 ) 1 (5 ) — — — Total recognized in other comprehensive (income) loss $ (16 ) $ (3 ) $ 58 $ 11 $ (199 ) $ 157 $ (3 ) $ (22 ) $ 2 Total recognized in net periodic benefit cost (benefit) and other comprehensive (income) loss $ 1 $ 14 $ 66 $ (12 ) $ (269 ) $ 160 $ (6 ) $ (19 ) $ 1 Funded status. As of October 31, 2018 and 2017 , the funded status of the defined benefit and post-retirement benefit plans was as follows: U.S. Defined Benefit Plans Non-U.S. Defined Benefit Plans U.S. Post-Retirement Benefit Plan 2018 2017 2018 2017 2018 2017 (in millions) Change in fair value of plan assets: Fair value — beginning of year $ 515 $ 464 $ 1,440 $ 1,317 $ 182 $ 171 Actual return on plan assets 6 72 2 136 3 26 Employer contributions 85 — 33 34 — — Settlements — — (6 ) (51 ) — — Benefits paid (31 ) (21 ) (42 ) (42 ) (13 ) (15 ) Currency impact — — (35 ) 46 — — Fair value — end of year $ 575 $ 515 $ 1,392 $ 1,440 $ 172 $ 182 Change in benefit obligation: Benefit obligation — beginning of year $ 675 $ 610 $ 1,338 $ 1,508 $ 207 $ 214 Service cost 24 22 14 18 1 1 Interest cost 25 21 23 23 7 7 Settlements — — (6 ) (142 ) — — Curtailments — — — (12 ) — — Actuarial loss (gain) (43 ) 43 (43 ) (69 ) (12 ) Benefits paid (31 ) (21 ) (42 ) (42 ) (13 ) (15 ) Currency impact — — (35 ) 54 — — Benefit obligation — end of year $ 650 $ 675 $ 1,249 $ 1,338 $ 190 $ 207 Overfunded (Underfunded) status of PBO $ (75 ) $ (160 ) $ 143 $ 102 $ (18 ) $ (25 ) Amounts recognized in the consolidated balance sheet consist of: Other assets $ — $ — $ 257 $ 211 $ — $ — Employee compensation and benefits (1 ) (1 ) — — — — Retirement and post-retirement benefits (74 ) (159 ) (114 ) (109 ) (18 ) (25 ) Net asset (liability) (a) $ (75 ) $ (160 ) $ 143 $ 102 $ (18 ) $ (25 ) Amounts recognized in accumulated other comprehensive income (loss): Actuarial losses $ 112 $ 135 $ 396 $ 385 $ 28 $ 45 Prior service credits (4 ) (11 ) (1 ) (1 ) (28 ) (42 ) Total $ 108 $ 124 $ 395 $ 384 $ — $ 3 (a) Certain of our immaterial defined benefit plans are not included in these disclosures. The amounts in accumulated other comprehensive income expected to be amortized into net periodic benefit cost (benefit) during 2019 are as follows: U.S. Defined Benefit Plans Non-U.S. Defined Benefit Plans U.S. Post-Retirement Benefit Plan (in millions) Amortization of net prior service credit $ (4 ) $ (1 ) $ (14 ) Amortization of actuarial net loss $ 10 $ 28 $ 9 Investment policies and strategies as of October 31, 2018 . In the U.S., our RP and U.S. Post-Retirement Benefit Plan target asset allocations are approximately 70 percent to equities and approximately 30 percent to fixed income investments. Our DPSP target asset allocation is approximately 60 percent to equities and approximately 40 percent to fixed income investments. The general investment objective for all our plan assets is to obtain the optimum rate of investment return on the total investment portfolio consistent with the assumption of a reasonable level of risk. Specific investment objectives for the plans' portfolios are to: maintain and enhance the purchasing power of the plans' assets; achieve investment returns consistent with the level of risk being taken; and earn performance rates of return in accordance with the benchmarks adopted for each asset class. Outside of the U.S., our target asset allocation is from 20 to 60 percent to equities, from 40 to 80 percent to fixed income investments, from zero to 20 percent to real estate investments and from zero to 14 percent to cash, depending on the plan. All plans' assets are broadly diversified. Due to fluctuations in capital markets, our actual allocations of plan assets as of October 31, 2018 , differ from the target allocation. Our policy is to periodically bring the actual allocation in line with the target allocation. Equity securities include exchange-traded common stock and preferred stock of companies from broadly diversified industries. Fixed income securities include a portfolio of corporate bonds of companies from diversified industries, government securities, mortgage-backed securities, asset-backed securities, derivative instruments and other. Portions of the cash and cash equivalent, equity, and fixed income investments are held in commingled funds. Fair Value . The measurement of the fair value of pension and post-retirement plan assets uses the valuation methodologies and the inputs as described in Note 12, "Fair Value Measurements." Cash and Cash Equivalents - Cash and cash equivalents consist of short-term investment funds. The funds also invest in short-term domestic fixed income securities and other securities with debt-like characteristics, emphasizing short-term maturities and quality. Cash and cash equivalents are classified as Level 1 investments except when the cash and cash equivalents are held in commingled funds, which have a daily net asset value ("NAV") derived from quoted prices for the underlying securities in active markets; these are classified as assets measured at NAV. Equity - Some equity securities consisting of common and preferred stock are held in commingled funds, which have daily NAVs derived from quoted prices for the underlying securities in active markets; these are classified as assets measure at NAV. Commingled funds which have quoted prices in active markets are classified as Level 1 investments. Fixed Income - Some of the fixed income securities are held in commingled funds, which have daily NAVs derived from the underlying securities; these are classified as assets measured at NAV. Commingled funds which have quoted prices in active markets are classified as Level 1 investments. Other Investments - Other investments include property-based pooled vehicles which invest in real estate. Market NAVs are regularly published in the financial press or on corporate websites; therefore, these investments are classified as Level 3 investments or assets measured at NAV. The following tables present the fair value of U.S. Defined Benefit Plans assets classified under the appropriate level of the fair value hierarchy as of October 31, 2018 and 2017: Fair Value Measurement as of October 31, 2018 Using October 31, Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Measured at NAV (in millions) Cash and cash equivalents $ 4 $ — $ 4 $ — $ — Equity 392 120 1 — 271 Fixed income 179 14 94 — 71 Other investments — — — — — Total assets measured at fair value $ 575 $ 134 $ 99 $ — $ 342 Fair Value Measurement as of October 31, 2017 Using October 31, Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Measured at NAV (in millions) Cash and cash equivalents $ 5 $ — $ 5 $ — $ — Equity 371 114 1 — 256 Fixed income 139 16 75 — 48 Other investments — — — — — Total assets measured at fair value $ 515 $ 130 $ 81 $ — $ 304 For U.S. Defined Benefit Plans, there was no activity relating to assets measured at fair value using significant unobservable inputs (Level 3) during 2018 and 2017. The following tables present the fair value of U.S. Post-Retirement Benefit Plan assets classified under the appropriate level of the fair value hierarchy as of October 31, 2018 and 2017: Fair Value Measurement as of October 31, 2018 Using October 31, Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Measured at NAV (in millions) Cash and cash equivalents $ 1 $ — $ 1 $ — $ — Equity 120 37 — — 83 Fixed income 51 4 27 — 20 Other investments — — — — — Total assets measured at fair value $ 172 $ 41 $ 28 $ — $ 103 Fair Value Measurement as of October 31, 2017 Using October 31, Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Measured at NAV (in millions) Cash and cash equivalents $ 3 $ 1 $ 2 $ — $ — Equity 132 41 — — 91 Fixed income 47 5 25 — 17 Other investments — — — — — Total assets measured at fair value $ 182 $ 47 $ 27 $ — $ 108 For U.S. Post-Retirement Benefit Plan, there was no activity relating to assets measured at fair value using significant unobservable inputs (Level 3) during 2018 and 2017. The following tables present the fair value of Non-U.S. Defined Benefit Plans assets classified under the appropriate level of the fair value hierarchy as of October 31, 2018 and 2017: Fair Value Measurement as of October 31, 2018 Using October 31, Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Measured at NAV (in millions) Cash and cash equivalents $ — $ — $ — $ — $ — Equity 791 135 — — 656 Fixed income 595 — 208 — 387 Other investments 6 — — 3 3 Total assets measured at fair value $ 1,392 $ 135 $ 208 $ 3 $ 1,046 Fair Value Measurement as of October 31, 2017 Using October 31, Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Measured at NAV (in millions) Cash and cash equivalents $ — $ — $ — $ — $ — Equity 757 156 2 — 599 Fixed income 677 — 200 — 477 Other investments 6 — — 3 3 Total assets measured at fair value $ 1,440 $ 156 $ 202 $ 3 $ 1,079 For Non-U.S. Defined Benefit Plans assets measured at fair value using significant unobservable inputs (Level 3), the following table summarizes the change in balances during 2018 and 2017: Year Ended October 31, 2018 2017 (in millions) Balance, beginning of year $ 3 $ 3 Realized gains — — Unrealized gains/(losses) — — Purchases, sales, issuances, and settlements — — Transfers in (out) — — Balance, end of year $ 3 $ 3 The table below presents the combined projected benefit obligation ("PBO"), accumulated benefit obligation ("ABO") and fair value of plan assets, grouping plans using comparisons of the PBO and ABO relative to the plan assets as of October 31, 2018 and 2017: 2018 2017 Benefit Obligation Fair Value of Plan Assets Benefit Obligation Fair Value of Plan Assets PBO PBO (in millions) (in millions) U.S. defined benefit plans where PBO exceeds the fair value of plan assets $ 650 $ 575 $ 675 $ 515 U.S. defined benefit plans where fair value of plan assets exceeds PBO — — — — Total $ 650 $ 575 $ 675 $ 515 Non-U.S. defined benefit plans where PBO exceeds or is equal to the fair value of plan assets $ 363 $ 249 $ 378 $ 269 Non-U.S. defined benefit plans where fair value of plan assets exceeds PBO 886 1,143 960 1,171 Total $ 1,249 $ 1,392 $ 1,338 $ 1,440 ABO ABO U.S. defined benefit plans where ABO exceeds the fair value of plan assets $ 609 $ 575 $ 629 $ 515 U.S. defined benefit plans where the fair value of plan assets exceeds ABO — — — — Total $ 609 $ 575 $ 629 $ 515 Non-U.S. defined benefit plans where ABO exceeds or is equal to the fair value of plan assets $ 351 $ 249 $ 364 $ 269 Non-U.S. defined benefit plans where fair value of plan assets exceeds ABO 879 1,143 952 1,171 Total $ 1,230 $ 1,392 $ 1,316 $ 1,440 Contributions and estimated future benefit payments . In 2018, we made an accelerated contribution of $85 million to our U.S. Defined Benefit Plans to secure tax deductibility at the current corporate rate prior to new tax legislation taking effect. During 2019, we do not expect to contribute to the U.S. Defined Benefit Plans or the U.S. Post-Retirement Benefit Plan, and we expect to contribute $33 million to the Non-U.S. Defined Benefit Plans. The following table presents expected future benefit payments for the next 10 years . U.S. Defined Benefit Plans Non-U.S. Defined Benefit Plans U.S. Post-Retirement Benefit Plan (in millions) 2019 $ 39 $ 32 $ 18 2020 $ 41 $ 36 $ 18 2021 $ 46 $ 39 $ 17 2022 $ 48 $ 41 $ 16 2023 $ 52 $ 44 $ 16 2024 - 2028 $ 275 $ 238 $ 71 Assumptions . The assumptions used to determine the benefit obligations and expense for our defined benefit and post-retirement benefit plans are presented in the tables below. The expected long-term return on assets below represents an estimate of long-term returns on investment portfolios, consisting of a mixture of equities, fixed income and other investments, in proportion to the asset allocations of each of our plans. We consider long-term rates of return, which are weighted based on the asset classes (both historical and forecasted) in which we expect our pension and post-retirement funds to be invested. Discount rates reflect the current rate at which pension and post-retirement obligations could be settled based on the measurement dates of the plans, which is October 31. The U.S. discount rates as of October 31, 2018 and 2017 were determined based on the results of matching expected plan benefit payments with cash flows from a hypothetically constructed bond portfolio. The Non-U.S. discount rates as of October 31, 2018 and 2017 were determined using spot rates along the yield curve to calculate disaggregated discount rates. In addition, we used this method to calculate two components of the periodic benefit cost: service cost and interest cost. The range of assumptions that were used for the Non-U.S. Defined Benefit Plans reflects the different economic environments within various countries. Assumptions used to calculate the net periodic benefit cost (benefit) for the year ended October 31, 2018 and 2017 were as follows: For years ended October 31, 2018 2017 U.S. Defined Benefit Plans: Discount rate 3.75% 3.50% Average increase in compensation levels 3.00% 3.00% Expected long-term return on assets 7.50% 7.50% Non-U.S. Defined Benefit Plans: Discount rate 0.59-2.52% 0.40-2.63% Average increase in compensation levels 2.50-3.25% 2.50-3.50% Expected long-term return on assets 4.00-6.50% 4.00-6.50% U.S. Post-Retirement Benefits Plan: Discount rate 3.50% 3.50% Expected long-term return on assets 7.50% 7.50% Current medical cost trend rate 6.00% 6.00% Ultimate medical cost trend rate 3.50% 3.50% Medical cost trend rate decreases to ultimate rate in year 2029 2029 Assumptions used to calculate the benefit obligation as of October 31, 2018 and 2017 were as follows: As of the years ended October 31, 2018 2017 U.S. Defined Benefit Plans: Discount rate 4.50% 3.75 % Average increase in compensation levels 3.00% 3.00 % Non-U.S. Defined Benefit Plans: Discount rate 0.83-2.83% 0.59-2.52% Average increase in compensation levels 2.50-3.00% 2.50-3.25% U.S. Post-Retirement Benefits Plan: Discount rate 4.25% 3.50 % Current medical cost trend rate 6.00% 6.00 % Ultimate medical cost trend rate 4.00% 3.50 % Medical cost trend rate decreases to ultimate rate in year 2029 2029 Health care trend rates did not have a significant effect on the total service and interest cost components or on the post-retirement benefit obligation amounts reported for the U.S. Post-Retirement Benefit Plan for the years ended October 31, 2018 and 2017.

GUARANTEES

GUARANTEES	12 Months Ended
	Oct. 31, 2018
Guarantees [Abstract]
GUARANTEES	GUARANTEES Standard Warranty Effective December 1, 2017, Keysight warranties on products sold through direct sales channels are primarily for one year. Warranties for products sold through distribution channels continue to be primarily for three years. We accrue for standard warranty costs based on historical trends in warranty charges. The accrual is reviewed regularly and periodically adjusted to reflect changes in warranty cost estimates. Estimated warranty charges are recorded within cost of products at the time related product revenue is recognized. Activity related to the standard warranty accrual, which is included in other accrued and other long-term liabilities in our consolidated balance sheet, is as follows: Year Ended October 31, 2018 2017 (in millions) Beginning balance $ 45 $ 44 Accruals for warranties, including change in estimates 36 33 Settlements made during the period (36 ) (32 ) Ending balance 45 $ 45 Accruals for warranties due within one year $ 25 $ 24 Accruals for warranties due after one year 20 21 Ending balance $ 45 $ 45 Indemnifications to Agilent In connection with our separation from Agilent, we agreed to indemnify Agilent against certain damages and expenses that it might incur in the future. These indemnifications primarily cover damages relating to liabilities of the electronic measurement business of Agilent which was contributed to Keysight. Additionally, if the distribution of Keysight common stock to the Agilent shareholders were determined to be taxable for U.S. federal income tax purposes, Agilent and its shareholders that are subject to U.S. federal income tax could incur significant U.S. federal income tax liabilities. If such determination is the result of our taking or failing to take certain actions, then under the agreement between Agilent and Keysight pertaining to tax matters, as finalized at the time of separation, we are generally required to indemnify Agilent against such tax liabilities. Pursuant to the agreement pertaining to tax matters, we may also be required to indemnify Agilent for other contingent tax liabilities, which could materially adversely affect our financial position. In our opinion, the fair value of these indemnification obligations was not material as of October 31, 2018 . Indemnifications to Avago In connection with the sale of Agilent's semiconductor products business in December 2005, Agilent agreed to indemnify Avago, its affiliates and other related parties against certain damages and expenses that it might incur in the future. The continuing indemnifications primarily cover damages and expenses relating to liabilities of the businesses that Agilent retained and did not transfer to Avago, as well as pre-closing taxes and other specified items. In connection with our separation from Agilent, we have agreed to indemnify Agilent in connection with the indemnification obligations of Agilent with respect to Avago. In our opinion, the fair value of these indemnification obligations was not material as of October 31, 2018 . Indemnifications to Verigy In connection with the spin-off of Verigy, Agilent agreed to indemnify Verigy and its affiliates against certain damages which it might incur in the future. These indemnifications primarily cover damages relating to liabilities of the businesses that Agilent did not transfer to Verigy, liabilities that might arise under limited portions of Verigy's IPO materials that relate to Agilent, and costs and expenses incurred by Agilent or Verigy to effect the IPO, arising out of the distribution of Agilent's remaining holding in Verigy ordinary shares to Agilent's stockholders, or incurred to effect the separation of the semiconductor test solutions business from Agilent to the extent incurred prior to the separation on June 1, 2006. On July 4, 2011, Verigy announced the completion by Advantest Corporation of its acquisition of Verigy. Verigy operates as a wholly-owned subsidiary of Advantest and Agilent's indemnification obligations to Verigy should be unaffected. In connection with our separation from Agilent, we have agreed to indemnify Agilent in connection with the indemnification obligations of Agilent with respect to Verigy. In our opinion, the fair value of these indemnification obligations was not material as of October 31, 2018 . Indemnifications to HP Inc. Agilent has given multiple indemnities to HP Inc. ("HP") in connection with Agilent's activities prior to its spin-off from HP for the businesses that constituted Agilent prior to the spin-off. These indemnifications cover a variety of aspects of Agilent's business, including, but not limited to, employee, tax, intellectual property and environmental matters. The agreements containing these indemnifications have been previously disclosed as exhibits to Agilent's registration statement on Form S-1 filed on August 16, 1999. As part of our separation from Agilent, we have agreed to assume these indemnification obligations of Agilent relating to the electronic measurement business with respect to HP. In our opinion, the fair value of these indemnification obligations was not material as of October 31, 2018 . Indemnifications to Officers and Directors Our corporate by-laws require that we indemnify our officers and directors, as well as those who act as directors and officers of other entities at our request, against expenses, judgments, fines, settlements and other amounts actually and reasonably incurred in connection with any proceedings arising out of their services to Keysight and such other entities, including service with respect to employee benefit plans. In addition, we have entered into separate indemnification agreements with each director and each board-appointed officer of Keysight which provide for indemnification of these directors and officers under similar circumstances and under additional circumstances. The indemnification obligations are more fully described in the by-laws and the indemnification agreements. We purchase standard insurance to cover claims or a portion of the claims made against our directors and officers. Since a maximum obligation is not explicitly stated in our by-laws or in our indemnification agreements and will depend on the facts and circumstances that arise out of any future claims, the overall maximum amount of the obligations cannot be reasonably estimated. Historically, we have not made payments related to these obligations, and the fair value for these indemnification obligations was not material as of October 31, 2018 . Other Indemnifications As is customary in our industry and as provided for in local law in the U.S. and other jurisdictions, many of our standard contracts provide remedies to our customers and others with whom we enter into contracts, such as defense, settlement, or payment of judgment for intellectual property claims related to the use of our products. From time to time, we indemnify customers, as well as our suppliers, contractors, lessors, lessees, companies that purchase our businesses or assets and others with whom we enter into contracts, against combinations of loss, expense, or liability arising from various triggering events related to the sale and the use of our products and services, the use of their goods and services, the use of facilities and state of our owned facilities, the state of the assets and businesses that we sell and other matters covered by such contracts, usually up to a specified maximum amount. In addition, from time to time we also provide protection to these parties against claims related to undiscovered liabilities, additional product liability or environmental obligations. In our experience, claims made under such indemnifications are rare and the associated estimated fair value of the liability was not material as of October 31, 2018 . In connection with the previous sales of several of Agilent’s businesses, Agilent agreed to indemnify the buyers of such businesses, their respective affiliates and other related parties against certain damages that they might incur in the future. The continuing indemnifications primarily cover damages relating to liabilities of the businesses that Agilent retained and did not transfer to the buyers, as well as other specified items. In connection with our separation from Agilent, we agreed to assume the indemnification obligations of Agilent to the extent that the retained businesses were part of the electronic measurement business. In our opinion, the fair value of these indemnification obligations was not material as of October 31, 2018.

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	12 Months Ended
	Oct. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Operating Lease Commitments. We lease certain real and personal property from unrelated third parties under non-cancellable operating leases. Future minimum lease payments under operating leases as of October 31, 2018 were $44 million in 2019, $38 million in 2020, $27 million in 2021, $22 million in 2022, $14 million in 2023 and $46 million thereafter. Future minimum sublease income under leases as of October 31, 2018 was $2 million in 2019, $1 million in 2020, $1 million in 2021, zero in 2022, zero in 2023 and none thereafter. Certain leases require us to pay property taxes, insurance and routine maintenance, and include escalation clauses. Total rent expense was $60 million in 2018, $51 million in 2017 and $45 million in 2016. Capital Lease Commitments. We had capital lease obligations of $4 million as of October 31, 2018 and October 31, 2017. The current portion of the total obligation is included in other accrued liabilities and the remaining long-term portion is included in other long-term liabilities on the consolidated balance sheet. Future minimum lease payments, including financing charges, under capital leases as of October 31, 2018 were $1 million in 2019, zero in 2020, $1 million in 2021, zero in 2022, $1 million in 2023 and $2 million thereafter. Assets held under capital leases are included in net property, plant, and equipment on the consolidated balance sheet. Litigation and Contingencies. We are involved in lawsuits, claims, investigations and proceedings, including, but not limited to, patent, commercial and environmental matters, which arise in the ordinary course of business. There are no matters pending that we currently believe are reasonably possible of having a material impact to our business, consolidated financial condition, results of operations or cash flows. On July 20, 2017, Centripetal Networks, Inc. ("Centripetal") filed a complaint in the United States District Court for the Eastern District of Virginia, Centripetal Networks, Inc. v. Keysight Technologies, Inc. and Ixia, Case No. 17-cv-00383-HCM-LRL (E.D. Va), alleging the infringement of Centripetal patents related to certain of Ixia’s products. Through July 31, 2018, we had accrued an immaterial amount, which represented a settlement offer made early in the litigation. At that time, we did not believe that a loss was probable or reasonably estimable, nor did we believe there was a reasonable possibility of a material loss. No settlement demands were made, nor were estimates of damages provided prior to court-ordered mediation. Mediation was held in September 2018 but did not result in resolution of the case. On October 2, 2018, trial started before a jury. During the trial, the parties agreed to settle the case for a worldwide, royalty-bearing, non-transferable, irrevocable, non-terminable, non-exclusive license to Centripetal’s worldwide patent portfolio that ends on December 31, 2021, as well as a monetary, one-time payment of $25 million for past damages that was recognized in selling, general and administrative expense in the consolidated statement of operations. The complaint was dismissed on October 12, 2018. The payment for past damages was recognized and paid as of October 31, 2018.

DEBT

DEBT	12 Months Ended
	Oct. 31, 2018
Debt Disclosure [Abstract]
DEBT	DEBT The following table summarizes the components of our short-term and long-term debt: October 31, 2018 2017 (in millions) 2019 Senior Notes at 3.30% ($500 face amount less unamortized costs of $1 and $2) $ 499 $ 498 2024 Senior Notes at 4.55% ($600 face amount less unamortized costs of $3 and $4) 597 596 2027 Senior Notes at 4.60% ($700 face amount less unamortized costs of $6 and $6) 694 694 Senior Unsecured Term loan — 260 Total Debt 1,790 2,048 Less: Short-term and current portion of long-term debt 499 10 Long-Term Debt $ 1,291 $ 2,038 Short-Term Debt Revolving Credit Facility On February 15, 2017 , we entered into an amended and restated credit agreement (the “Revolving Credit Facility”) that replaced our existing $450 million unsecured credit facility dated September 15, 2014. The Revolving Credit Facility provides for a $450 million , five-year unsecured revolving credit facility that will expire on February 15, 2022 and bears interest at an annual rate of LIBOR + 1.30% . In addition, the Revolving Credit Facility permits us to increase the total commitments under this credit facility by up to $150 million in the aggregate on one or more occasions upon request. We may use amounts borrowed under the facility for general corporate purposes. During the year ended October 31, 2018, we borrowed and repaid $40 million of borrowings outstanding under the Revolving Credit Facility. As of October 31, 2018, we had no borrowings outstanding under the Revolving Credit Facility. We were in compliance with the covenants of the Revolving Credit Facility during the year ended October 31, 2018. 2019 Senior Notes In October 2014, the company issued an aggregate principal amount of $500 million in unsecured senior notes ("2019 Senior Notes"). The 2019 Senior Notes were issued at 99.902 percent of their principal amount. The notes will mature on October 30, 2019, and bear interest at a fixed rate of 3.30 percent per annum. The interest is payable semi-annually on April 30 and October 30 of each year. We incurred issuance costs of $4 million in connection with the 2019 Senior Notes that are being amortized to interest expense over the term of the senior notes. The 2019 senior notes are repayable within one year and have been reclassified to short-term debt. Long-Term Debt 2024 Senior Notes In October 2014, the company issued an aggregate principal amount of $600 million in unsecured senior notes ("2024 Senior Notes"). The 2024 Senior Notes were issued at 99.966 percent of their principal amount. The notes will mature on October 30, 2024, and bear interest at a fixed rate of 4.55 percent per annum. The interest is payable semi-annually on April 30 and October 30 of each year. We incurred issuance costs of $5 million in connection with the 2024 Senior Notes that are being amortized to interest expense over the term of the senior notes. 2027 Senior Notes In April 2017, the company issued an aggregate principal amount of $700 million in unsecured senior notes ("2027 Senior Notes"). The 2027 Senior Notes were issued at 99.873 percent of their principal amount. The notes will mature on April 6, 2027 and bear interest at a fixed rate of 4.60 percent per annum. The interest is payable semi-annually on April 6 and October 6 of each year, commencing on October 6, 2017. We incurred issuance costs of $6 million in connection with the 2027 Senior Notes that, along with the debt discount of $1 million, are being amortized to interest expense over the term of the senior notes. The above senior notes are unsecured and rank equally in right of payment with all of our other senior unsecured indebtedness. Senior Unsecured Term Loan On February 15, 2017, we entered into a term credit agreement that provides for a three-year $400 million senior unsecured term loan that bears interest at an annual rate of LIBOR + 1.50%. The term loan was drawn upon the closing of the Ixia acquisition. On February 27, 2018, we fully repaid borrowings outstanding under the term loan of $260 million and terminated the credit agreement. We had previously repaid $140 million of the term loan during the year ended October 31, 2017. Letters of Credit As of October 31, 2018 and October 31, 2017, we had $26 million and $26 million , respectively, of outstanding letters of credit unrelated to the credit facility that were issued by various lenders.

STOCKHOLDERS' EQUITY

STOCKHOLDERS' EQUITY	12 Months Ended
	Oct. 31, 2018
Statement of Comprehensive Income [Abstract]
STOCKHOLDERS' EQUITY	STOCKHOLDERS' EQUITY Stock Repurchase Program On March 6, 2018, the Board of Directors approved a new stock repurchase program authorizing the purchase of up to $350 million of the company’s common stock, replacing a previously approved 2016 program authorizing the purchase of up to $200 million of the company's common stock. Under the new program, shares may be purchased from time to time, subject to general business and market conditions and other investment opportunities, through open market purchases, privately negotiated transactions or other means. All such shares and related costs are held as treasury stock and accounted for at trade date using the cost method. The stock repurchase program may be commenced, suspended or discontinued at any time at the company’s discretion and does not have an expiration date. For the year ended October 31, 2018, we repurchased 2,075,460 shares of common stock for $120 million . For the year ended October 31, 2017, we did not repurchase any shares of common stock under the stock repurchase program. All such shares and related costs are held as treasury stock and accounted for at trade date using the cost method. Accumulated other comprehensive loss The following table summarizes the components of our accumulated other comprehensive loss as of October 31, 2018 and 2017, net of tax effect: October 31, 2018 2017 (in millions) Unrealized gain on equity securities, net of tax (expense) of $(2) and $(5) $ — $ 14 Foreign currency translation, net of tax (expense) of $(63) and $(63) (60 ) (39 ) Unrealized losses on defined benefit plans, net of tax benefit of $81 and $82 (426 ) (433 ) Unrealized losses on derivative instruments, net of tax benefit (expense) of $(1) and $(2) (2 ) 1 Total accumulated other comprehensive loss $ (488 ) $ (457 ) Changes in accumulated other comprehensive income (loss) by component and related tax effects for the years ended October 31, 2018 and 2017 were as follows: Net defined benefit pension cost and post retirement plan costs: Unrealized gain (loss) on equity securities Foreign currency translation Actuarial Losses Prior service credits Unrealized gains (losses) on derivatives Total (in millions) At October 31, 2016 $ 10 $ (29 ) $ (646 ) $ 50 $ (3 ) $ (618 ) Other comprehensive income (loss) before reclassifications 5 (10 ) 177 — 6 178 Amounts reclassified out of accumulated other comprehensive income — — 69 (24 ) 1 46 Tax (expense) benefit (1 ) — (68 ) 9 (3 ) (63 ) Other comprehensive income (loss) for the twelve months ended October 31, 2017 4 (10 ) 178 (15 ) 4 161 At October 31, 2017 14 (39 ) (468 ) 35 1 (457 ) Other comprehensive income (loss) before reclassifications (17 ) (21 ) (23 ) — — (61 ) Amounts reclassified out of accumulated other comprehensive income — — 53 (22 ) (4 ) 27 Tax (expense) benefit 3 — (7 ) 6 1 3 Other comprehensive income (loss) for the twelve months ended October 31, 2018 (14 ) (21 ) 23 (16 ) (3 ) (31 ) At October 31, 2018 $ — $ (60 ) $ (445 ) $ 19 $ (2 ) $ (488 ) Reclassifications out of accumulated other comprehensive loss for the years ended October 31, 2018 and 2017 were as follows: Details about accumulated other comprehensive loss components Amounts reclassified from other comprehensive loss Affected line item in statement of operations Year Ended October 31, 2018 2017 (in millions) Unrealized gain (loss) on derivatives $ 4 $ (1 ) Cost of products (1 ) 1 Provision for income tax 3 — Net of Income Tax Net defined benefit pension cost and post retirement plan costs: Net actuarial loss (53 ) (69 ) Prior service credit 22 24 (31 ) (45 ) Total before income tax 9 14 Provision for income tax (22 ) (31 ) Net of income tax Total reclassifications for the period $ (19 ) $ (31 ) An amount in parentheses indicates a reduction to income and an increase to the accumulated other comprehensive income. Reclassifications of prior service benefit and actuarial net loss in respect of retirement plans and post retirement pension plans are included in the computation of net periodic cost (see Note 14, "Retirement Plans and Post Retirement Pension Plans").

SEGMENT INFORMATION

SEGMENT INFORMATION	12 Months Ended
	Oct. 31, 2018
Segment Reporting [Abstract]
SEGMENT INFORMATION	SEGMENT INFORMATION We provide electronic design and test instruments and systems and related software, software design tools, and related services that are used in the design, development, manufacture, installation, deployment and operation of electronics equipment. Related services include start-up assistance, instrument productivity and application services and instrument calibration and repair. Additionally, we provide test, security and visibility solutions that validate, secure and optimize networks and applications from engineering concept to live deployment. We also offer customization, consulting and optimization services throughout the customer's product life cycle. On April 18, 2017, we completed the acquisition of Ixia, which became a separate reportable operating segment, the Ixia Solutions Group. As a result, Keysight has four segments: Communications Solutions Group, Electronic Industrial Solutions Group, Ixia Solutions Group and Services Solutions Group. Our operating segments were determined based primarily on how the chief operating decision maker views and evaluates our operations. Segment operating results are regularly reviewed by the chief operating decision maker to make decisions about resources to be allocated to each segment and to assess performance. Other factors, including market separation and customer specific applications, go-to-market channels, products and services and manufacturing are considered in determining the formation of these operating segments. Descriptions of our four reportable segments are as follows: The Communications Solutions Group serves customers spanning the worldwide commercial communications end market, which includes internet infrastructure, and the aerospace, defense and government end market. The group provides electronic design and test software, instruments, and systems used in the simulation, design, validation, manufacturing, installation and optimization of electronic equipment. The Electronic Industrial Solutions Group provides test and measurement solutions across a broad set of electronic industrial end markets, focusing on high-growth applications in the automotive and energy industry and measurement solutions for semiconductor design and manufacturing, consumer electronics, education and general electronics manufacturing. The group provides electronic design and test software, instruments, and systems used in the simulation, design, validation, manufacturing, installation and optimization of electronic equipment. The Ixia Solutions Group helps customers validate the performance and security resilience of their networks and associated applications. The test, visibility and security products help organizations and their customers strengthen their physical and virtual networks. Enterprises, service providers, network equipment manufacturers, and governments worldwide rely on the group's solutions to validate new products before shipping and secure ongoing operation of their networks with better visibility and security. The group’s product solutions consist of high-performance hardware platforms, software applications, and services, including warranty and maintenance offerings. The Services Solutions Group provides repair, calibration and consulting services, and remarkets used Keysight equipment. In addition to providing repair and calibration support for Keysight equipment, we also calibrate non-Keysight equipment. The group serves the same markets as Keysight’s Communications Solutions and Electronic Industrial Solutions Groups, providing industry-specific services to deliver complete Keysight solutions and help customers reduce their total cost of ownership for their design and test equipment. A significant portion of the segments' expenses, other than the Ixia Solutions Group expenses, arise from shared services and infrastructure that we have historically provided to the segments in order to realize economies of scale and to efficiently optimize resources. These expenses, collectively called corporate charges, include costs of centralized research and development, legal, accounting, real estate, insurance services, information technology services, treasury and other corporate infrastructure expenses. Charges are allocated to the segments, and the allocations have been determined on a basis that we consider to be a reasonable reflection of the utilization of services provided to or benefits received by the segments. The Ixia Solutions Group has not been allocated these shared services and infrastructure charges, with the exception of net periodic benefit costs, for the current fiscal year. The following tables reflect the results of our reportable segments under our management reporting system. These results are not necessarily in conformity with GAAP. The performance of each segment is measured based on several metrics, including income from operations. These results are used, in part, by the chief operating decision maker in evaluating the performance of, and in allocating resources to, each of the segments. The profitability of each of the segments is measured after excluding share-based compensation expense, restructuring and related costs, amortization of acquisition-related balances, acquisition and integration costs, acquisition-related compensation expense, separation and related costs, pension curtailment and settlement loss (gains), northern California wildfire-related costs, goodwill impairment, legal settlement, gain on divestitures, interest income, interest expense and other items as noted in the reconciliations below. Communications Solutions Group Electronic Industrial Solutions Group Ixia Solutions Group Services Solutions Group Total Segments (in millions) Year ended October 31, 2018: Total net revenue $ 2,036 $ 965 $ 416 $ 461 $ 3,878 Amortization of acquisition-related balances 1 — 35 — 36 Total segment revenue $ 2,037 $ 965 $ 451 $ 461 $ 3,914 Segment income from operations $ 454 $ 241 $ 21 $ 68 $ 784 Depreciation expense $ 51 $ 20 $ 16 $ 16 $ 103 Year ended October 31, 2017: Total net revenue $ 1,737 $ 836 $ 197 $ 419 $ 3,189 Amortization of acquisition-related balances 1 — 59 — 60 Total segment revenue $ 1,738 $ 836 $ 256 $ 419 $ 3,249 Segment income from operations $ 311 $ 199 $ 42 $ 68 $ 620 Depreciation expense $ 52 $ 20 $ 7 $ 13 $ 92 Year ended October 31, 2016: Total net revenue $ 1,740 $ 776 $ — $ 402 $ 2,918 Amortization of acquisition-related balances 12 — $ — $ — 12 Total segment revenue $ 1,752 $ 776 $ — $ 402 $ 2,930 Segment income from operations $ 314 $ 169 $ — $ 63 $ 546 Depreciation expense $ 53 $ 20 $ — $ 12 $ 85 The following table reconciles reportable segments' income from operations to our total enterprise income before taxes: Year Ended October 31, 2018 2017 2016 (in millions) Total reportable segments' income from operations $ 784 $ 620 $ 546 Share-based compensation expense (59 ) (56 ) (49 ) Restructuring and related costs (17 ) (11 ) — Amortization of acquisition-related balances (265 ) (256 ) (56 ) Acquisition and integration costs (49 ) (57 ) (18 ) Acquisition-related compensation expense — (28 ) — Separation and related costs (2 ) (20 ) (24 ) Pension curtailment and settlement loss (gain) (1 ) 69 — Northern California wildfire-related costs (7 ) (16 ) — Goodwill impairment (709 ) — — Legal settlement (25 ) — — Gain on divestitures 20 — — Other (16 ) (6 ) 7 Income (loss) from operations, as reported (346 ) 239 406 Interest income 12 7 3 Interest expense (83 ) (80 ) (47 ) Other income (expense), net 6 13 4 Income (loss) before taxes, as reported $ (411 ) $ 179 $ 366 Major customers. No customer represented 10 percent or more of our total net revenue in 2018 , 2017 or 2016 . The following table presents assets and capital expenditures directly managed by each segment. Unallocated assets primarily consist of cash and cash equivalents, investments, long-term and other receivables and other assets. Communications Solutions Group Electronic Industrial Solutions Group Ixia Solutions Group Services Solutions Group Total (in millions) As of October 31, 2018: Assets $ 1,854 $ 811 $ 1,327 $ 338 $ 4,330 Capital expenditures $ 63 $ 27 $ 10 $ 32 $ 132 As of October 31, 2017: Assets $ 1,739 $ 799 $ 2,063 $ 304 $ 4,905 Capital expenditures $ 36 $ 15 $ 7 $ 14 $ 72 The following table reconciles segment assets to our total assets: October 31, 2018 2017 (in millions) Total reportable segments' assets $ 4,330 $ 4,905 Cash and cash equivalents 913 818 Prepaid expenses 106 113 Other current assets 9 7 Investments 46 63 Long-term and other receivables 118 118 Other 302 (91 ) Total assets $ 5,824 $ 5,933 The other category primarily includes pension assets and also represents the difference between how segments report deferred taxes and intangible assets at the initial purchased amount. The following table presents summarized information for net revenue and long-lived assets by geographic region. Revenues from external customers are generally attributed to countries based upon the location of the Keysight sales representative. Long lived assets consist of property, plant, and equipment, long-term receivables and other long-term assets excluding intangible assets. The rest of the world primarily consists of rest of Asia and Europe. United States China Japan Rest of the World Total (in millions) Net revenue: Year ended October 31, 2018 $ 1,398 $ 710 $ 342 $ 1,428 $ 3,878 Year ended October 31, 2017 $ 1,054 $ 608 $ 338 $ 1,189 $ 3,189 Year ended October 31, 2016 $ 1,009 $ 572 $ 323 $ 1,014 $ 2,918 United States Japan Malaysia UK Rest of the World Total (in millions) Long-lived assets: October 31, 2018 $ 310 $ 222 $ 72 $ 145 $ 121 $ 870 October 31, 2017 $ 280 $ 234 $ 73 $ 106 $ 126 $ 819

NORTHERN CALIFORNIA WILDFIRES I

NORTHERN CALIFORNIA WILDFIRES IMPACT (Notes)	12 Months Ended
	Oct. 31, 2018
Unusual or Infrequent Items, or Both [Abstract]
Unusual or Infrequent Items, or Both, Disclosure [Text Block]	IMPACT OF NORTHERN CALIFORNIA WILDFIRES During the week of October 8, 2017, wildfires in northern California adversely impacted the Keysight corporate headquarters site in Santa Rosa, CA. Our headquarters was under mandatory evacuation for more than three weeks, and while direct damage to our core facilities was limited, our buildings did experience some smoke and other fire-related impacts. Cleaning and restoration efforts are largely complete, and we have fully re-occupied the site. Keysight is insured for the damage caused by the fire. For the year ended October 31, 2018 and 2017, we recognized costs of $7 million and $16 million , respectively, net of estimated insurance recoveries of $90 million and $2 million , respectively. Expenses were primarily for cleaning and restoration activities, write-off of damaged fixed assets and other direct costs related to recovery from this event. A summary of the net charges in the consolidated statement of operations resulting from the impact of the fire is shown below: Year Ended October 31, 2018 Year Ended October 31, 2017 (in millions) Cost of products and services $ 5 $ 5 Research and development 1 1 Selling, general and administrative 1 8 Other operating expense (income), net — 2 Total $ 7 $ 16 As of October 31, 2018, we have received insurance proceeds of $68 million and have a receivable of $24 million for losses and expenses for which insurance reimbursement is probable. The receivable is included in other current assets in the consolidated balance sheet. In addition, for the year ended October 31, 2018, we made investments in property, plant and equipment related to fire recovery of $27 million , which is expected to be covered by insurance. In many cases, our insurance coverage exceeds the amount of these covered losses, but no gain contingencies have been recognized as our ability to realize those gains remains uncertain for financial reporting purposes. We currently estimate total insurance recovery to range from $125 million to $135 million , which will substantially cover our total fire-related losses, expenses and investments in property, plant and equipment in excess of our $10 million self-insured retention amount. There may be a difference in timing of costs incurred and the related insurance reimbursement.

SCHEDULE II - VALUATION AND QUA

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS	12 Months Ended
	Oct. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
VALUATION AND QUALIFYING ACCOUNTS	SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS Description Balance at Additions Charged to Deductions Credited to Expenses or Other Accounts** Balance at (in millions) 2018 Tax valuation allowance $ 63 $ 18 $ (2 ) $ 79 2017 Tax valuation allowance $ 38 $ 31 $ (6 ) $ 63 2016 Tax valuation allowance $ 46 $ 4 $ (12 ) $ 38 * Additions include current year additions charged to expenses and current year build due to increases in net deferred tax assets, return to provision true-ups, other adjustments and Other Comprehensive Income ("OCI") impact to deferred taxes. ** Deductions include current year releases credited to expenses and current year reductions due to decreases in net deferred tax assets, return to provision true-ups, other adjustments and OCI impact to deferred taxes.

OVERVIEW AND SUMMARY OF SIGNI_2

OVERVIEW AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Oct. 31, 2018
Accounting Policies [Abstract]
Commitments and Contingencies, Policy [Policy Text Block]	We accrue for probable losses from contingencies, including legal settlement costs, on an undiscounted basis when such costs are considered probable of being incurred and are reasonably estimable. We periodically evaluate available information, both internal and external, relative to such contingencies and adjust this accrual as necessary.
Basis of Presentation and Significant Accounting Policies [Text Block]	Basis of Presentation. We have prepared the accompanying financial statements pursuant to the rules and regulations of the SEC and in conformity with generally accepted accounting principles in the U.S. ("GAAP"). Our fiscal year end is October 31. Unless otherwise stated, all years and dates refer to our fiscal year. Management is responsible for the fair presentation of the accompanying consolidated financial statements, prepared in accordance with GAAP, and has full responsibility for their integrity and accuracy. In the opinion of management, the accompanying consolidated financial statements contain all normal and recurring adjustments necessary to present fairly our consolidated balance sheet and our consolidated statement of operations, statement of comprehensive income, statement of cash flows and statement of equity.
Principles of consolidation	The consolidated financial statements include the accounts of the company and our wholly- and majority-owned subsidiaries. All significant inter-company transactions have been eliminated.
Use of estimates	The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the amounts reported in our consolidated financial statements and accompanying notes. Management bases its estimates on historical experience and various other assumptions believed to be reasonable. Although these estimates are based on management's knowledge of current events and actions that may impact the company in the future, actual results may be different from the estimates. Our critical accounting policies are those that affect our financial statements materially and involve difficult, subjective or complex judgments by management. Those policies are revenue recognition, inventory valuation, share-based compensation, retirement and post-retirement plan assumptions, valuation of goodwill and other intangible assets, warranty, loss contingencies, restructuring and accounting for income taxes.
Revenue recognition	Revenue recognition. We enter into agreements to sell products (hardware and/or software), services and other arrangements (multiple-element arrangements) that include combinations of products and services. We recognize revenue, net of trade discounts and allowances, provided that (1) persuasive evidence of an arrangement exists, (2) delivery has occurred, (3) the price is fixed or determinable and (4) collectability is reasonably assured. Delivery is considered to have occurred when title and risk of loss have transferred to the customer, for products, or when the service has been provided. We consider the price to be fixed or determinable when the price is not subject to refund or adjustments. We consider arrangements with extended payment terms not to be fixed or determinable, and accordingly we defer revenue until amounts become due. At the time of the transaction, we evaluate the creditworthiness of our customers to determine the appropriate timing of revenue recognition. Product revenue. Our product revenue is generated predominantly from the sales of various types of test equipment and associated software. Product revenue, including sales to resellers and distributors, is reduced for estimated returns, when appropriate. For sales or arrangements that include customer-specified acceptance criteria, including those where acceptance is required upon achievement of performance milestones, revenue is recognized after the acceptance criteria have been met. For products that include installation, if the installation meets the criteria to be considered a separate element, product revenue is recognized upon delivery, and recognition of installation revenue is delayed until the installation is complete. Otherwise, neither the product nor the installation revenue is recognized until the installation is complete. Where software is licensed separately, revenue is recognized when the software is delivered and has been transferred to the customer or, in the case of electronic delivery of software, when the customer is given access to the licensed software programs. We also evaluate whether collection of the receivable is probable, the fee is fixed or determinable and whether any other undelivered elements of the arrangement exist on which a portion of the total fee would be allocated based on vendor-specific objective evidence ("VSOE"). When VSOE is not available, we use third-party evidence ("TPE") or management's best estimate of selling price ("ESP"). Service revenue. Revenue from services includes repair and calibration services, extended warranty, customer and software support, consulting, training and education. Service revenue is deferred and recognized over the contractual period or as services are rendered and accepted by the customer. For example, customer support contracts are recognized ratably over the contractual period, while training revenue is recognized as the training is provided to the customer. In addition, the four revenue recognition criteria described above must be met before service revenue is recognized. Revenue recognition for arrangements with multiple deliverables. Our multiple-element arrangements are generally comprised of a combination of measurement instruments, installation or other start-up services, and/or software and/or support or services. Hardware and software elements are typically delivered at the same time, and revenue is recognized upon delivery and acceptance, if required, once title and risk of loss pass to the customer. Delivery of installation, start-up services and other services varies based on the complexity of the equipment, staffing levels in a geographic location and customer preferences, and can range from a few days to a few months. Service revenue is deferred and recognized over the contractual period or as services are rendered and accepted by the customer. Revenue from the sale of software products that are not required to deliver the tangible product's essential functionality are accounted for under software revenue recognition rules, which require VSOE of fair value to allocate revenue in a multiple-element arrangement. Our arrangements generally do not include any provisions for cancellation, termination or refunds that would significantly impact recognized revenue. We evaluate the deliverables in our multiple-element arrangements and conclude that they are separate units of accounting if it is determined the delivered item or items have value to the customer on a standalone basis. For arrangements that include a general right of return relative to the delivered item(s), delivery or performance of the undelivered item(s) has been determined to be probable and substantially in our control. We allocate revenue to each element in our multiple-element arrangements based on their relative selling prices. We determine the selling price for each deliverable based on a selling price hierarchy. The selling price for a deliverable is based on VSOE if available, TPE if VSOE is not available, or ESP if neither VSOE nor TPE is available. Revenue allocated to each element is then recognized when the basic revenue recognition criteria for that element have been met. Within our Ixia Solutions Group, when an arrangement contains software and non-software deliverables, we use a two-step process to allocate revenue to each element in the arrangement. First, we allocate the total arrangement fee to the separate non-software and software deliverables as a group based on their relative selling prices. Then, we allocate revenue within the software group utilizing the residual method with revenue allocated to the undelivered elements based on VSOE and the residual amount allocated to the delivered elements. We use VSOE of selling price in the selling price allocation in all instances where it exists. VSOE of selling price for products and services is determined when a substantial majority of the selling prices fall within a reasonable range when sold separately. TPE of selling price can be established by evaluating largely interchangeable competitor products or services in standalone sales to similarly situated customers. As our products contain a significant element of proprietary technology and the solution offered differs substantially from that of competitors, it is difficult to obtain the reliable standalone competitive pricing necessary to establish TPE. ESP represents the best estimate of the price at which we would transact a sale if the product or service were sold on a standalone basis. We determine ESP for a product or service by using historical selling prices that reflect multiple factors including, but not limited to, customer type, geography, market conditions, competitive landscape, gross margin objectives and pricing practices. The determination of ESP is made through consultation with and approval by management. We may modify or develop new pricing practices and strategies in the future. As these pricing strategies evolve, changes may occur in ESP. The aforementioned factors may result in a different allocation of revenue to the deliverables in multiple-element arrangements, which may change the pattern and timing of revenue recognition for these elements but will not change the total revenue recognized for the arrangement. Shipping and handling costs. Our shipping and handling costs charged to customers are included in net revenue, and the associated expense is recorded in cost of products for all periods presented. Deferred revenue. Deferred revenue represents the amount of service and software revenue deferred and recognized over the contractual period or as services are rendered and accepted by the customer. In addition, it includes the amount allocated to undelivered elements in multiple-element arrangements. We limit the revenue recognized to the amount that is not contingent on the future delivery of products or services or meeting other specified performance conditions.
Accounts receivable, net	Trade accounts receivable are recorded at the invoiced amount and do not bear interest. Such accounts receivable have been reduced by an allowance for doubtful accounts, which is our best estimate of the amount of probable credit losses in our existing accounts receivable. We determine the allowance based on customer specific experience and the aging of such receivables, among other factors. The allowance for doubtful accounts was approximately $2 million and $3 million as of October 31, 2018 and 2017, respectively. We do not have any off-balance-sheet credit exposure related to our customers. Accounts receivable are also recorded net of estimated product returns.
Share-based compensation	e account for share-based awards made to our employees and directors, including restricted stock units, employee stock purchases made under Keysight's Employee Stock Purchase Plan ("Keysight's ESPP"), employee stock option awards, and performance share awards under Keysight Technologies, Inc. Long-Term Performance ("Keysight's LTP") Program, using the estimated grant date fair value method of accounting.
Inventory	Inventory is valued at standard cost, which approximates actual cost computed on a first-in, first-out basis, not in excess of market value. We assess the valuation of our inventory on a periodic basis and make adjustments to the value for estimated excess and obsolete inventory based on estimates about future demand and actual usage. The excess balance determined by this analysis becomes the basis for our excess inventory charge. Our excess inventory review process includes analysis of sales unit forecasts, managing product rollovers and working with manufacturing to maximize recovery of excess inventory.
Warranty	for three years. We accrue for standard warranty costs based on historical trends in warranty charges. The accrual is reviewed regularly and periodically adjusted to reflect changes in warranty cost estimates. Estimated warranty charges are recorded within cost of products at the time related product revenue is recognized. See Note 15, "Guarantees." We also sell extended warranties that provide warranty coverage beyond the standard warranty term. Revenue associated with extended warranties is deferred and recognized over the extended coverage period. We accrue for standard warranty costs based on historical trends in warranty charges. The accrual is reviewed regularly and periodically adjusted to reflect changes in warranty cost estimates. Estimated warranty charges are recorded within cost of products at the time related product revenue is recognized.
Taxes on income	Income tax expense is based on income or loss before taxes. Deferred income taxes reflect the effect of temporary differences between asset and liability amounts that are recognized for financial reporting purposes and the amounts that are recognized for income tax purposes. These deferred taxes are measured by applying currently enacted tax laws. Valuation allowances are recognized to reduce deferred tax assets to the amount that is more likely than not to be realized. We account for uncertainty in income taxes using a two-step approach to recognize and measure uncertain tax positions. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates that it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount that is more than 50 percent likely of being realized upon settlement. We make adjustments to these reserves when facts and circumstances change, such as the closing of a tax audit or the refinement of an estimate due to new information. We classify the liability for unrecognized tax benefits as current to the extent that the company anticipates payment (or receipt) of cash within one year. Interest and penalties related to uncertain tax positions are recognized in the provision for income taxes. Given the number of years and numerous matters that remain subject to examination in various tax jurisdictions, we are unable to estimate the range of possible changes to the balance of our unrecognized tax benefits.
Goodwill and other intangible assets	Goodwill is assessed for impairment on a reporting unit basis at least annually in the fourth quarter, as of September 30, or more frequently when events and circumstances occur indicating that the recorded goodwill may be impaired. The impairment test compares the fair value of a reporting unit with its carrying amount, with an impairment charge recorded for the amount by which the carrying amount exceeds the reporting unit’s fair value. We determine fair values for each of the reporting units using the market approach, when available and appropriate, or the income approach, or a combination of both. If multiple valuation methodologies are used, the results are weighted appropriately. Valuations using the market approach are derived from metrics of publicly traded comparable companies. The selections of comparable businesses are based on the markets in which our reporting units operate, giving consideration to risk profiles, size, geography and diversity of products and services. Under the income approach, fair value is determined based on the present value of estimated future cash flows, discounted at an appropriate risk-adjusted rate. We use our internal forecasts to estimate future cash flows and include an estimate of long-term future growth rates based on our most recent views of the long-term outlook for each business. As defined in the authoritative guidance, a reporting unit is an operating segment or one level below an operating segment. During the fourth quarter of 2018, we performed our annual impairment test for all our reporting units. Based on the results of our testing, the fair value of each of our reporting units exceeded the carrying value, except for our Ixia Solutions Group (“ISG”) reporting unit. The primary factors contributing to a reduction in fair value of ISG were weaker-than-expected market growth rates since acquisition and significant integration efforts resulting in lower revenue and profitability trends included in our long-term financial forecasts. As a result, we recorded an impairment loss of $709 million for ISG for the year ended October 31, 2018. There were no impairments of goodwill during the years ended October 31, 2017 and 2016. Refer to Note 3, “Acquisitions,” and Note 10, “Goodwill and Other Intangible Assets,” for additional information about our goodwill and other intangible assets. Other intangible assets consist primarily of developed technologies, proprietary know-how, trademarks, customer relationships, non-compete agreements, and acquired backlog and are amortized using the straight-line method over estimated useful lives ranging from 2 months to 10 years. We review other intangible assets for impairment whenever events or changes in business circumstances indicate that the carrying amount of the assets may not be fully recoverable or that the useful lives of these assets are no longer appropriate. No impairments of purchased intangible assets were recorded during the years ended October 31, 2018, 2017 and 2016. The authoritative accounting guidance allows a qualitative approach for testing indefinite-lived intangible assets for impairment, similar to the impairment testing guidance for goodwill. It allows the option to first assess qualitative factors (events and circumstances) that could have affected the significant inputs used in determining the fair value of the indefinite-lived intangible asset. The qualitative factors assist in determining whether it is more-likely-than-not that the indefinite-lived intangible asset is impaired. An organization may choose to bypass the qualitative assessment for any indefinite-lived intangible asset in any period and proceed directly to calculating its fair value. Our indefinite-lived intangible assets are in-process research and development ("IPR&D") intangible assets. In 2018 and 2017, we assessed impairment by performing a qualitative test and recorded impairment charges of $5 million and $7 million, respectively, related to cancellations of IPR&D projects. There were no impairments in 2016.
Advertising	Advertising costs are expensed as incurred and were $21 millio n in 2018 , $22 million in 2017 and $19 million in 2016 .
Research and development	Costs related to the research, design and development of our products are charged to research and development expense as they are incurred.
Sales Taxes	Sales taxes collected from customers and remitted to governmental authorities are not included in our revenue.
Investments	Cost method investments, consisting of non-marketable equity securities, are accounted for at historical cost. Trading securities are reported at fair value, with gains or losses resulting from changes in fair value recognized currently in earnings. Investments designated as available-for-sale are reported at fair value, with unrealized gains and losses, net of tax, included in accumulated other comprehensive income. The company assesses investments for impairment whenever events or changes in circumstances indicate that the carrying value of an investment may not be recoverable. There was no impairment recognized in 2018 and 2017. In 2016, cost method investments with a carrying amount of $2 million were written down to their fair value of zero , resulting in an impairment charge of $2 million , which is included in other income (expense).
Net income per share	Basic net income per share is computed by dividing net income by the weighted average number of common shares outstanding during the period excluding the dilutive effect of stock options and other employee stock plans. Diluted net income per share gives effect to all potentially dilutive common stock equivalents outstanding during the period. The dilutive effect of share-based awards is reflected in diluted net income per share by application of the treasury stock method, which includes consideration of unamortized share-based compensation expense, and the dilutive effect of in-the-money options and non-vested restricted stock units. Under the treasury stock method, the amount the employee must pay for exercising stock options and unamortized share-based compensation expense are assumed proceeds to be used to repurchase hypothetical shares.
Cash, cash equivalents and short term investments	We classify investments as cash equivalents if their original maturity or remaining maturity at the time of purchase is three months or less at the date of purchase. Cash equivalents are stated at cost, which approximates fair value. As of October 31, 2018 , approximately $782 million of our cash and cash equivalents was held outside of the U.S. in our foreign subsidiaries. Under U.S. tax legislation that was enacted on December 22, 2017, certain earnings currently held outside of the U.S. are deemed to be repatriated to the U.S., with foreign cash balances generally subject to an effective U.S. tax rate of 15.5 percent and certain cumulative foreign earnings in excess of foreign cash balances subject to an effective U.S. tax rate of 8 percent . Our cash and cash equivalents mainly consist of short-term deposits held at major global financial institutions, investments in institutional money market funds, and similar short duration instruments with original maturities of 90 days or less. We continuously monitor the creditworthiness of the financial institutions in which we invest our funds. We classify investments as short-term investments if their original maturities are greater than three months and their remaining maturities are one year or less. Restricted cash . As of October 31, 2018, restricted cash of approximately $4 million consisted primarily of deposits held as collateral against bank guarantees, of which $2 million is classified within other current assets and $2 million is classified within other assets in the consolidated balance sheet. As of October 31, 2017, restricted cash of approximately $2 million consisted of deposits held as collateral against bank guarantees and is classified within other assets in the consolidated balance sheet.
Fair value of financial instruments	The carrying values of certain of our financial instruments, including cash and cash equivalents, accounts receivable, accounts payable and other accrued liabilities, approximate fair value because of their short maturities. The fair value of long-term equity investments is determined using quoted market prices for those securities when available. For those long-term equity investments accounted for under the cost or equity method, the carrying value approximates estimated fair value. The fair value of our long-term debt, calculated from quoted prices that are primarily Level 1 inputs under the accounting guidance fair value hierarchy, exceeded the carrying value by approximately $3 million and $91 million as of October 31, 2018 and 2017, respectively. The fair value of foreign currency contracts used for hedging purposes is estimated internally by using inputs tied to active markets. These inputs, for example, interest rate yield curves, foreign exchange rates, and forward and spot prices for currencies, are observable in the market or can be corroborated by observable market data for substantially the full term of the assets or liabilities. See also Note 12, "Fair Value Measurements," for additional information on the fair value of financial instruments.
Concentration of credit risk	Financial instruments that potentially subject us to significant concentration of credit risk include money market fund investments, time deposits and demand deposit balances. These investments are categorized as cash and cash equivalents and long-term investments. In addition, we have credit risk from derivative financial instruments used in hedging activities and accounts receivable. We invest in a variety of financial instruments and limit the amount of credit exposure with any one financial institution. We have a comprehensive credit policy in place and credit exposure is monitored on an ongoing basis. Credit risk with respect to our accounts receivable is diversified due to the large number of entities comprising our customer base and their dispersion across many different industries and geographies. Credit evaluations are performed on customers requiring credit over a certain amount. Credit risk is mitigated through collateral, such as letters of credit, bank guarantees or payment terms like cash in advance. No single customer accounted for more than 10 percent of accounts receivable as of October 31, 2018 or 2017 .
Derivative instruments	We are exposed to global foreign currency exchange rate risk in the normal course of business. We enter into foreign exchange hedging contracts, primarily forward contracts and purchased options to manage financial exposures resulting from changes in foreign currency exchange rates. Foreign currency exposures include committed and anticipated revenue and expense transactions (cash flow exposure) and assets and liabilities that are denominated in currencies other than the functional currency of the subsidiary (balance sheet exposure). For cash flow hedges, contracts are designed at inception as hedges of the related foreign currency exposures. For option contracts, we exclude time value from the measurement of effectiveness. We formally document all relationships between hedging instruments and hedged items, as well as our risk-management objective and strategy for undertaking various hedge transactions at the inception of the hedge. This process includes linking all derivatives that are designated as cash flow hedges to specific forecasted transactions. We also formally assess, both at the hedge’s inception and on an ongoing basis, whether the hedging instruments are highly effective in offsetting changes in cash flows of hedged items. Our foreign exchange hedging contracts generally mature within twelve months. We do not use derivative financial instruments for speculative trading purposes. All derivatives are recognized on the balance sheet at their fair values. For derivative instruments that are designated and qualify as a cash flow hedge, changes in the value of the effective portion of the derivative instrument is recognized in accumulated comprehensive income, a component of stockholders' equity. Amounts associated with cash flow hedges are reclassified and recognized in income when either the forecast transaction occurs or it becomes probable the forecast transaction will not occur. Derivatives not designated as hedging instruments are recorded on the balance sheet at fair value, and changes in fair value are recorded in earnings in the current period. Derivative instruments are subject to master netting arrangements and qualify for net presentation in the balance sheet. Changes in the fair value of the ineffective portion of derivative instruments are recognized in earnings in the current period. Cash flows from derivative instruments are classified in the statement of cash flows in the same category as the cash flows from the hedged or economically hedged item, primarily in operating activities.
Property, plant and equipment	Property, plant and equipment are stated at cost less accumulated depreciation. Additions, improvements and major renewals are capitalized; maintenance, repairs and minor renewals are expensed as incurred. When assets are retired or disposed of, the assets and related accumulated depreciation and amortization are removed from our general ledger, and the resulting gain or loss is reflected in the consolidated statement of operations. Buildings and improvements are depreciated over the lesser of their useful lives or the remaining term of the lease and machinery and equipment, which is generally over three to ten years. We use the straight-line method to depreciate assets.
Leases	We lease buildings, machinery and equipment under operating leases for original terms ranging generally from one to twenty-five years. Certain leases contain renewal options for periods up to ten years.
Capitalized software	We capitalize certain internal and external costs incurred to acquire or create internal use software. Capitalized software is included in property, plant and equipment and is depreciated over three years once development is complete.
Impairment of long-lived assets	We continually monitor events and changes in circumstances that could indicate carrying amounts of long-lived assets, including intangible assets, may not be recoverable. When such events or changes in circumstances occur, we assess the recoverability of long-lived assets by determining whether the carrying value of such assets will be recovered through undiscounted expected future cash flows. If the total of the undiscounted future cash flows is less than the carrying amount of those assets, we recognize an impairment loss based on the excess of the carrying amount over the fair value of the assets.
Restructuring costs	The main component of our existing restructuring plans is related to workforce reductions. Workforce reduction charges are accrued when payment of benefits becomes probable and the amounts can be estimated. If the amounts and timing of cash flows from restructuring activities are significantly different from what we have estimated, the actual amount of restructuring and other related charges could be materially different, either higher or lower, than those we have recorded.
Employee compensation and benefits	Amounts owed to employees, such as accrued salary, bonuses and vacation benefits are reported within employee compensation and benefits in the consolidated balance sheet. The total amount of accrued vacation benefit was $80 million and $72 million as of October 31, 2018 and 2017 , respectively.
Foreign currency translation	We translate and remeasure balance sheet and statement of operations items into U.S. dollars. For those subsidiaries that operate in a local currency functional environment, all assets and liabilities are translated into U.S. dollars using current exchange rates at the balance sheet date; revenue and expenses are translated using monthly exchange rates that approximate average exchange rates in effect during each period. Resulting translation adjustments are reported as a separate component of accumulated other comprehensive income (loss) in stockholders' equity. For those subsidiaries that operate in a U.S. dollar functional environment, foreign currency assets and liabilities are re-measured into U.S. dollars at current exchange rates except for non-monetary assets and capital accounts, which are remeasured at historical exchange rates. Revenue and expenses are generally remeasured at monthly exchange rates that approximate average exchange rates in effect during each period. Gains or losses from foreign currency re-measurement are included in net income. Net gains or losses resulting from foreign currency transactions are reported in other income (expense) and were a $4 million gain in 2018, a $1 million gain in 2017, and zero in 2016.
Retirement plans and post-retirement benefit plan assumptions	ension accounting is intended to reflect the recognition of future benefit costs over the employees' average expected future service to Keysight based on the terms of the plans and investment and funding decisions. To estimate the impact of these future payments and our decisions concerning funding of these obligations, we are required to make assumptions using actuarial concepts within the framework of GAAP. Two critical assumptions are the discount rate and the expected long-term return on plan assets. Other important assumptions include expected future salary increases, expected future increases to benefit payments, expected retirement dates, employee turnover, retiree mortality rates and portfolio composition. We evaluate these assumptions at least annually. See Note 14, "Retirement Plans and Post-Retirement Benefit Plans."

GUARANTEES (Policies)

GUARANTEES (Policies)	12 Months Ended
	Oct. 31, 2018
Product Warranties Disclosures [Abstract]
Warranty	for three years. We accrue for standard warranty costs based on historical trends in warranty charges. The accrual is reviewed regularly and periodically adjusted to reflect changes in warranty cost estimates. Estimated warranty charges are recorded within cost of products at the time related product revenue is recognized. See Note 15, "Guarantees." We also sell extended warranties that provide warranty coverage beyond the standard warranty term. Revenue associated with extended warranties is deferred and recognized over the extended coverage period. We accrue for standard warranty costs based on historical trends in warranty charges. The accrual is reviewed regularly and periodically adjusted to reflect changes in warranty cost estimates. Estimated warranty charges are recorded within cost of products at the time related product revenue is recognized.

ACQUISITIONS (Tables)

ACQUISITIONS (Tables)	12 Months Ended
	Oct. 31, 2018
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Information	Supplemental Pro Forma Information (Unaudited) The following represents pro forma operating results as if Ixia had been included in the company's consolidated statements of operations as of the beginning of fiscal 2017 and 2016, respectively (in millions, except per share amounts): Year Ended October 31, 2017 2016 Net revenue $ 3,462 $ 3,413 Net income $ 116 $ 231 Net income per share - Basic $ 0.63 $ 1.26 Net income per share - Diluted $ 0.62 $ 1.25
Ixia [Member]
Business Acquisition [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	The following table summarizes the allocation of the purchase price to the estimated fair values of the assets acquired and liabilities assumed on the closing date of April 18, 2017 (in millions): Cash and cash equivalents $ 72 Short-term investments 44 Accounts receivable 91 Inventory 107 Other current assets 34 Property, plant and equipment 50 Goodwill 1,117 Other intangible assets 744 Other assets 4 Total assets acquired 2,263 Accounts payable (10 ) Employee compensation and benefits (32 ) Deferred revenue (35 ) Income and other taxes payable (1 ) Other accrued liabilities (32 ) Other long-term liabilities (459 ) Net assets acquired $ 1,694
Schedule of Business Acquisitions, by Acquisition
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination	The components of intangible assets acquired in connection with the Ixia acquisition were as follows (in millions): Estimated Fair Value Estimated useful life Developed product technology $ 423 4 years Customer relationships 234 7 years Tradenames and trademarks 12 3 years Backlog 8 90 days Total intangible assets subject to amortization 677 In-process research and development 67 Total intangible assets $ 744
ScienLab [Member]
Business Acquisition [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	The following table summarizes the allocation of the purchase price to the estimated fair values of the assets acquired and liabilities assumed on the closing date of August 31, 2017 (in millions): Cash and cash equivalents $ 2 Accounts receivable 3 Inventory 16 Other current assets 1 Goodwill 23 Other intangible assets 40 Total assets acquired 85 Accounts payable (1 ) Deferred revenue (3 ) Income and other taxes payable (2 ) Current portion of long-term debt (1 ) Other long-term liabilities (16 ) Net assets acquired $ 62
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination	The components of intangible assets acquired in connection with the ScienLab acquisition were as follows (in millions): Estimated Fair Value Estimated useful life Developed product technology $ 33 6 years Customer relationships 4 5 years Non-compete agreements 1 3 years Tradenames and trademarks 1 3 years Backlog 1 6 months Total intangible assets $ 40
Anite [Member]
Business Acquisition [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
Schedule of Business Acquisitions, by Acquisition
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination

SHARE-BASED COMPENSATION (Table

SHARE-BASED COMPENSATION (Tables)	12 Months Ended
	Oct. 31, 2018
Share-based Compensation [Abstract]
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs	The impact of share-based compensation expense on our results was as follows: Year Ended October 31, 2018 2017 2016 (in millions) Cost of products and services $ 11 $ 11 $ 11 Research and development 10 9 8 Selling, general and administrative 38 36 30 Total share-based compensation expense $ 59 $ 56 $ 49
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions And Methodology	The following assumptions were used to estimate the fair value of TSR-based performance awards. Year Ended October 31, 2018 2017 2016 Volatility of Keysight shares 25% 27% 25% Volatility of index/peer group 14% 15% 14%-54% Price-wise correlation with selected peers 57% 57% 38%
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award	The following table summarizes 2018 activity related to stock option awarded to our employees and directors: Options Outstanding Weighted Average Exercise Price (in thousands) Outstanding at October 31, 2017 2,354 $ 27 Granted — $ — Exercised (1,048 ) $ 26 Forfeited and expired — $ — Outstanding at October 31, 2018 1,306 $ 27 There were no forfeited or expired options in 2018.
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range	The options outstanding and exercisable at October 31, 2018 were as follows: Options Outstanding Options Exercisable Range of Exercise Prices Number Outstanding Weighted Average Remaining Contractual Life Weighted Average Exercise Price Aggregate Intrinsic Value Number Exercisable Weighted Average Remaining Contractual Life Weighted Average Exercise Price Aggregate Intrinsic Value (in thousands) (in years) (in thousands) (in thousands) (in years) (in thousands) $0 - 25 415 3.1 $ 20 $ 15,505 415 3.1 $ 20 $ 15,505 $25.01 - 30 288 5.1 $ 30 7,836 288 5.1 $ 30 7,836 $30.01 - 40 603 6.0 $ 31 15,740 363 6.0 $ 31 9,476 1,306 4.9 $ 27 $ 39,081 1,066 4.6 $ 26 $ 32,817
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Intrinsic Value Options Exercised	The following table summarizes the aggregate intrinsic value of options exercised in 2018 , 2017 and 2016 : Aggregate Intrinsic Value Weighted Average Exercise Price (in thousands) Options exercised in fiscal 2016 $ 5,656 $ 19 Options exercised in fiscal 2017 $ 16,385 $ 20 Options exercised in fiscal 2018 $ 28,985 $ 26
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Roll Forward	The following table summarizes non-vested award activity in 2018 primarily for our LTP Program and restricted stock unit awards: Shares Weighted Average Grant Date Fair Value (in thousands) Non-vested at October 31, 2017 3,640 $ 33 Granted 1,335 $ 46 Vested (1,354 ) $ 33 Forfeited (155 ) $ 38 LTP Program decremental (107 ) $ 31 Non-vested at October 31, 2018 3,359 $ 36

INCOME TAXES (Tables)

INCOME TAXES (Tables)	12 Months Ended
	Oct. 31, 2018
Income Tax Disclosure [Abstract]
Schedule of Income before Income Tax, Domestic and Foreign	The domestic and foreign components of income (loss) before taxes are: Year Ended October 31, 2018 2017 2016 (in millions) U.S. operations $ (532 ) $ (147 ) $ (30 ) Non-U.S. operations 121 326 396 Total income (loss) before taxes $ (411 ) $ 179 $ 366
Components Of Income Tax Expense Disclosure	The provision (benefit) for income taxes is comprised of: Year Ended October 31, 2018 2017 2016 (in millions) U.S. federal taxes: Current $ 131 $ 21 $ (15 ) Deferred 46 (56 ) (13 ) Non-U.S. taxes: Current 75 101 32 Deferred (832 ) 9 28 State taxes, net of federal benefit: Current 7 2 (1 ) Deferred (3 ) — — Total provision (benefit) for income taxes $ (576 ) $ 77 $ 31
Income Tax Effects On Net Deferred Tax Assets Liabilities Disclosure	The significant components of deferred tax assets and deferred tax liabilities included in the consolidated balance sheet are: October 31, 2018 2017 Deferred Tax Assets Deferred Tax Liabilities Deferred Tax Assets Deferred Tax Liabilities (in millions) Inventory $ 14 $ — $ 16 $ (3 ) Intangibles 664 (66 ) 55 (158 ) Property, plant and equipment 14 (23 ) 16 (20 ) Warranty reserves 11 (1 ) 17 (1 ) Pension benefits 47 (67 ) 90 (58 ) Employee benefits, other than retirement 27 (1 ) 29 (1 ) Net operating loss, capital loss, and credit carryforwards 120 — 257 — Unremitted earnings of foreign subsidiaries — (5 ) — (305 ) Share-based compensation 14 — 26 — Deferred revenue 37 (1 ) 24 (3 ) Other 11 (1 ) 10 (10 ) Subtotal 959 (165 ) 540 (559 ) Tax valuation allowance (79 ) — (63 ) — Total deferred tax assets or deferred tax liabilities $ 880 $ (165 ) $ 477 $ (559 )
Current And Long Term Tax Assets And Current And Long Term Tax Liabilities Disclosure
Summary Of Income Tax Expense Reconciliation	The differences between the U.S. federal statutory income tax rate and our effective tax rate are: Year Ended October 31, 2018 2017 2016 (in millions) Profit before tax times statutory rate $ (96 ) $ 63 $ 128 State income taxes, net of federal benefit 2 1 (1 ) U.S. federal statutory tax rate change 10 — — Non-U.S. income taxed at different rates 16 (83 ) (88 ) Singapore tax incentives and amortization (591 ) — — U.S. transition tax and repatriation of foreign earnings 210 5 (42 ) Foreign earnings not considered indefinitely reinvested 5 3 39 Re-measurement of deferred taxes on foreign earnings not considered indefinitely reinvested (304 ) — — Change in unrecognized tax benefits 86 23 1 U.S. research credits (10 ) (7 ) (5 ) Share-based compensation (1 ) 7 5 Goodwill impairment 99 — — Malaysia tax assessment — 68 — Other, net (2 ) (3 ) (6 ) Provision (benefit) for income taxes $ (576 ) $ 77 $ 31 Effective tax rate 140 % 43 % 8 %
Current and Long Term Tax Assets and Liabilities	The breakdown between current and long-term income tax assets and liabilities, excluding deferred tax assets and liabilities, was as follows for the years 2018 and 2017 : October 31, 2018 2017 (in millions) Current income tax assets (included within other current assets) $ 32 $ 40 Current income tax liabilities (included within income and other taxes payable) (18 ) (7 ) Long-term income tax assets (included within other assets) — — Long-term income tax liabilities (included within other long-term liabilities) (205 ) (39 ) Total $ (191 ) $ (6 )
Summary of Income Tax Contingencies	The aggregate changes in the balances of our unrecognized tax benefits including all federal, state and foreign tax jurisdictions are as follows: 2018 2017 2016 (in millions) Balance, beginning of year $ 146 $ 51 $ 50 Additions due to acquisition — 22 — Additions for tax positions related to the current year 93 31 5 Additions for tax positions from prior years 2 52 1 Reductions for tax positions from prior years (1 ) (9 ) (4 ) Settlements with taxing authorities (12 ) — — Statute of limitations expirations (1 ) (1 ) (1 ) Balance, end of year $ 227 $ 146 $ 51

NET INCOME PER SHARE (Tables)

NET INCOME PER SHARE (Tables)	12 Months Ended
	Oct. 31, 2018
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	The following is a reconciliation of the numerator and denominator of the basic and diluted net income per share computations. Year Ended October 31, 2018 2017 2016 (in millions) Numerator: Net income $ 165 $ 102 $ 335 Denominator: Basic weighted-average shares 187 180 170 Potential common shares— stock options and other employee stock plans 4 2 2 Diluted weighted-average shares 191 182 172

SUPPLEMENTAL CASH FLOW INFORM_2

SUPPLEMENTAL CASH FLOW INFORMATION Non-Cash Investing Activities (Tables)	12 Months Ended
	Oct. 31, 2018
Other Significant Noncash Transactions [Line Items]
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]	Year Ended October 31, 2018 2017 2016 (in millions) Non-cash investing activities: Increase (decrease) in unpaid capital expenditures $ 10 $ (4 ) $ (11 ) Increase in capital lease liabilities — 4 1 $ 10 $ — $ (10 )

INVENTORY (Tables)

INVENTORY (Tables)	12 Months Ended
	Oct. 31, 2018
Inventory, Net [Abstract]
Inventory	October 31, 2018 2017 (in millions) Finished goods $ 283 $ 286 Purchased parts and fabricated assemblies 336 302 Total inventory $ 619 $ 588

PROPERTY, PLANT AND EQUIPMENT_2

PROPERTY, PLANT AND EQUIPMENT, NET (Tables)	12 Months Ended
	Oct. 31, 2018
Property, Plant and Equipment, Net [Abstract]
Property, Plant and Equipment	October 31, 2018 2017 (in millions) Land $ 63 $ 63 Buildings and leasehold improvements 695 678 Machinery and equipment 1,074 1,008 Total property, plant and equipment 1,832 1,749 Accumulated depreciation and amortization (1,277 ) (1,219 ) Property, plant and equipment, net $ 555 $ 530

GOODWILL AND OTHER INTANGIBLE_2

GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)	12 Months Ended
	Oct. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	The goodwill balances as of October 31, 2018 , 2017 and 2016 and the movements in 2018 and 2017 for each of our reportable segments were as follows: Communications Solutions Group Electronic Industrial Solutions Group Ixia Solutions Group Services Solutions Group Total (in millions) Goodwill at October 31, 2016 $ 456 $ 216 $ — $ 64 $ 736 Foreign currency translation impact (15 ) 1 — 1 (13 ) Goodwill arising from acquisitions — 23 1,117 19 1,159 Goodwill at October 31, 2017 441 240 1,117 84 1,882 Foreign currency translation impact (2 ) (2 ) (1 ) — (5 ) Goodwill arising from acquisitions — — — 6 6 Impairment losses — — (709 ) — (709 ) Divestitures (2 ) (1 ) — — (3 ) Balance at October 31, 2018 $ 437 $ 237 $ 407 $ 90 $ 1,171 Goodwill $ 437 $ 237 $ 1,116 $ 90 $ 1,880 Accumulated impairment losses — — (709 ) — (709 ) Balance at October 31, 2018 $ 437 $ 237 $ 407 $ 90 $ 1,171
Schedule of Other Intangible Assets by Major Class	ther intangible assets as of October 31, 2018 and 2017 consisted of the following: Other Intangible Assets as of October 31, 2018 Other Intangible Assets as of October 31, 2017 Gross Carrying Amount Accumulated Amortization and Impairments Net Book Value Gross Carrying Amount Accumulated Amortization and Impairments Net Book Value (in millions) Developed technology $ 835 $ 415 $ 420 $ 808 $ 252 $ 556 Backlog 13 13 — 13 12 1 Trademark/Tradename 33 14 19 33 8 25 Customer relationships 304 100 204 304 61 243 Non-compete agreements 1 — 1 1 — 1 Total amortizable intangible assets 1,186 542 644 1,159 333 826 In-Process R&D 1 — 1 29 — 29 Total $ 1,187 $ 542 $ 645 $ 1,188 $ 333 $ 855

INVESTMENTS (Tables)

INVESTMENTS (Tables)	12 Months Ended
	Oct. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Equity Investments	Net book value of investments as of October 31, 2018 and 2017 were as follows: October 31, 2018 2017 (in millions) Long-Term Cost method investments $ 16 $ 16 Trading securities 13 13 Available-for-sale investments 17 34 Total $ 46 $ 63
Available-for-sale Securities	Investments in available-for-sale securities at estimated fair value were as follows: October 31, 2018 October 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (in millions) Long-Term Equity securities $ 15 $ 2 $ — $ 17 $ 15 $ 19 $ — $ 34

FAIR VALUE MEASUREMENTS (Tables

FAIR VALUE MEASUREMENTS (Tables)	12 Months Ended
	Oct. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Assets and Liabilities Measured on Recurring Basis	Financial assets and liabilities measured at fair value on a recurring basis as of October 31, 2018 and 2017 were as follows: Fair Value Measurements as of October 31, 2018 Fair Value Measurements as of October 31, 2017 Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 (in millions) Assets: Short-term Cash equivalents Money market funds $ 484 $ 484 $ — $ — $ 403 $ 403 $ — $ — Derivative instruments (foreign exchange contracts) 6 — 6 — 6 — 6 — Long-term Trading securities 13 13 — — 13 13 — — Available-for-sale investments 17 17 — — 34 34 — — Total assets measured at fair value $ 520 $ 514 $ 6 $ — $ 456 $ 450 $ 6 $ — Liabilities: Short-term Derivative instruments (foreign exchange contracts) $ 6 $ — $ 6 $ — $ 1 $ — $ 1 $ — Long-term Deferred compensation liability 13 — 13 — 13 — 13 — Total liabilities measured at fair value $ 19 $ — $ 19 $ — $ 14 $ — $ 14 $ —

DERIVATIVES (Tables)

DERIVATIVES (Tables)	12 Months Ended
	Oct. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	The aggregated notional amounts by currency and designation as of October 31, 2018 were as follows: Derivatives in Derivatives Not Designated as Hedging Instruments Forward Contracts Forward Contracts Currency Buy/(Sell) Buy/(Sell) (in millions) Euro $ 14 $ 95 British Pound — (28 ) Singapore Dollar 15 1 Malaysian Ringgit 79 1 Japanese Yen (86 ) (1 ) Other currencies 3 6 $ 25 $ 74
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The gross fair values and balance sheet presentation of derivative instruments held as of October 31, 2018 and 2017 were as follows: Fair Values of Derivative Instruments Asset Derivatives Liability Derivatives Fair Value Fair Value Balance Sheet Location October 31, October 31, Balance Sheet Location October 31, October 31, (in millions) Derivatives designated as hedging instruments: Cash flow hedges Foreign exchange contracts Other current assets $ 5 $ 5 Other accrued liabilities $ 4 $ — Derivatives not designated as hedging instruments: Foreign exchange contracts Other current assets 1 1 Other accrued liabilities 2 1 Total derivatives $ 6 $ 6 $ 6 $ 1
Derivative Instruments, Gain (Loss)	The effect of derivative instruments for foreign exchange contracts designated as hedging instruments and not designated as hedging instruments in our consolidated statement of operations was as follows: 2018 2017 2016 (in millions) Derivatives designated as hedging instruments: Cash flow hedges Foreign exchange contracts: Gain (loss) recognized in accumulated other comprehensive income $ — $ 6 $ (7 ) Gain (loss) reclassified from accumulated other comprehensive income into cost of products $ 4 $ (1 ) $ (12 ) Derivatives not designated as hedging instruments: Gain (loss) recognized in other income (expense), net $ 4 $ 6 $ (10 )

RETIREMENT PLANS AND POST RET_2

RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Tables)	12 Months Ended
	Oct. 31, 2018
Defined Benefit Plan [Abstract]
Schedule of Defined Benefit Plans Disclosures	For the years ended October 31, 2018 , 2017 and 2016 , components of net periodic benefit cost (benefit) and other amounts recognized in other comprehensive income were comprised of: Defined Benefit Plans U.S. Post-Retirement Benefit Plan U.S. Plans Non-U.S. Plans 2018 2017 2016 2018 2017 2016 2018 2017 2016 (in millions) Net periodic benefit cost (benefit) Service cost — benefits earned during the period $ 24 $ 22 $ 21 $ 14 $ 18 $ 19 $ 1 $ 1 $ 1 Interest cost on benefit obligation 25 21 22 23 23 32 7 7 9 Expected return on plan assets (37 ) (33 ) (37 ) (85 ) (74 ) (74 ) (13 ) (11 ) (14 ) Amortization: Net actuarial loss 12 15 9 25 33 27 16 21 20 Prior service credit (7 ) (8 ) (7 ) (1 ) (1 ) (1 ) (14 ) (15 ) (17 ) Net periodic benefit cost (benefit) 17 17 8 (24 ) (1 ) 3 (3 ) 3 (1 ) Curtailments and settlements — — — 1 (69 ) — — — — Net periodic benefit cost (benefit) $ 17 $ 17 $ 8 $ (23 ) $ (70 ) $ 3 $ (3 ) $ 3 $ (1 ) Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss Net actuarial loss (gain) $ (11 ) $ 4 $ 60 $ 41 $ (145 ) $ 188 $ (1 ) $ (16 ) $ 5 Amortization: Net actuarial loss (12 ) (15 ) (9 ) (25 ) (33 ) (27 ) (16 ) (21 ) (20 ) Prior service credit 7 8 7 1 1 1 14 15 17 Settlement — — — (1 ) (24 ) — — — — Curtailment — — — — 1 — — — — Foreign currency — — — (5 ) 1 (5 ) — — — Total recognized in other comprehensive (income) loss $ (16 ) $ (3 ) $ 58 $ 11 $ (199 ) $ 157 $ (3 ) $ (22 ) $ 2 Total recognized in net periodic benefit cost (benefit) and other comprehensive (income) loss $ 1 $ 14 $ 66 $ (12 ) $ (269 ) $ 160 $ (6 ) $ (19 ) $ 1
Schedule of Changes in Fair Value of Plan Assets	As of October 31, 2018 and 2017 , the funded status of the defined benefit and post-retirement benefit plans was as follows: U.S. Defined Benefit Plans Non-U.S. Defined Benefit Plans U.S. Post-Retirement Benefit Plan 2018 2017 2018 2017 2018 2017 (in millions) Change in fair value of plan assets: Fair value — beginning of year $ 515 $ 464 $ 1,440 $ 1,317 $ 182 $ 171 Actual return on plan assets 6 72 2 136 3 26 Employer contributions 85 — 33 34 — — Settlements — — (6 ) (51 ) — — Benefits paid (31 ) (21 ) (42 ) (42 ) (13 ) (15 ) Currency impact — — (35 ) 46 — — Fair value — end of year $ 575 $ 515 $ 1,392 $ 1,440 $ 172 $ 182 Change in benefit obligation: Benefit obligation — beginning of year $ 675 $ 610 $ 1,338 $ 1,508 $ 207 $ 214 Service cost 24 22 14 18 1 1 Interest cost 25 21 23 23 7 7 Settlements — — (6 ) (142 ) — — Curtailments — — — (12 ) — — Actuarial loss (gain) (43 ) 43 (43 ) (69 ) (12 ) Benefits paid (31 ) (21 ) (42 ) (42 ) (13 ) (15 ) Currency impact — — (35 ) 54 — — Benefit obligation — end of year $ 650 $ 675 $ 1,249 $ 1,338 $ 190 $ 207 Overfunded (Underfunded) status of PBO $ (75 ) $ (160 ) $ 143 $ 102 $ (18 ) $ (25 ) Amounts recognized in the consolidated balance sheet consist of: Other assets $ — $ — $ 257 $ 211 $ — $ — Employee compensation and benefits (1 ) (1 ) — — — — Retirement and post-retirement benefits (74 ) (159 ) (114 ) (109 ) (18 ) (25 ) Net asset (liability) (a) $ (75 ) $ (160 ) $ 143 $ 102 $ (18 ) $ (25 ) Amounts recognized in accumulated other comprehensive income (loss): Actuarial losses $ 112 $ 135 $ 396 $ 385 $ 28 $ 45 Prior service credits (4 ) (11 ) (1 ) (1 ) (28 ) (42 ) Total $ 108 $ 124 $ 395 $ 384 $ — $ 3
Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year	The amounts in accumulated other comprehensive income expected to be amortized into net periodic benefit cost (benefit) during 2019 are as follows: U.S. Defined Benefit Plans Non-U.S. Defined Benefit Plans U.S. Post-Retirement Benefit Plan (in millions) Amortization of net prior service credit $ (4 ) $ (1 ) $ (14 ) Amortization of actuarial net loss $ 10 $ 28 $ 9
Schedule of Allocation of Plan Assets	The following tables present the fair value of U.S. Defined Benefit Plans assets classified under the appropriate level of the fair value hierarchy as of October 31, 2018 and 2017: Fair Value Measurement as of October 31, 2018 Using October 31, Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Measured at NAV (in millions) Cash and cash equivalents $ 4 $ — $ 4 $ — $ — Equity 392 120 1 — 271 Fixed income 179 14 94 — 71 Other investments — — — — — Total assets measured at fair value $ 575 $ 134 $ 99 $ — $ 342 Fair Value Measurement as of October 31, 2017 Using October 31, Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Measured at NAV (in millions) Cash and cash equivalents $ 5 $ — $ 5 $ — $ — Equity 371 114 1 — 256 Fixed income 139 16 75 — 48 Other investments — — — — — Total assets measured at fair value $ 515 $ 130 $ 81 $ — $ 304 For U.S. Defined Benefit Plans, there was no activity relating to assets measured at fair value using significant unobservable inputs (Level 3) during 2018 and 2017. The following tables present the fair value of U.S. Post-Retirement Benefit Plan assets classified under the appropriate level of the fair value hierarchy as of October 31, 2018 and 2017: Fair Value Measurement as of October 31, 2018 Using October 31, Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Measured at NAV (in millions) Cash and cash equivalents $ 1 $ — $ 1 $ — $ — Equity 120 37 — — 83 Fixed income 51 4 27 — 20 Other investments — — — — — Total assets measured at fair value $ 172 $ 41 $ 28 $ — $ 103 Fair Value Measurement as of October 31, 2017 Using October 31, Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Measured at NAV (in millions) Cash and cash equivalents $ 3 $ 1 $ 2 $ — $ — Equity 132 41 — — 91 Fixed income 47 5 25 — 17 Other investments — — — — — Total assets measured at fair value $ 182 $ 47 $ 27 $ — $ 108 For U.S. Post-Retirement Benefit Plan, there was no activity relating to assets measured at fair value using significant unobservable inputs (Level 3) during 2018 and 2017. The following tables present the fair value of Non-U.S. Defined Benefit Plans assets classified under the appropriate level of the fair value hierarchy as of October 31, 2018 and 2017: Fair Value Measurement as of October 31, 2018 Using October 31, Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Measured at NAV (in millions) Cash and cash equivalents $ — $ — $ — $ — $ — Equity 791 135 — — 656 Fixed income 595 — 208 — 387 Other investments 6 — — 3 3 Total assets measured at fair value $ 1,392 $ 135 $ 208 $ 3 $ 1,046 Fair Value Measurement as of October 31, 2017 Using October 31, Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Measured at NAV (in millions) Cash and cash equivalents $ — $ — $ — $ — $ — Equity 757 156 2 — 599 Fixed income 677 — 200 — 477 Other investments 6 — — 3 3 Total assets measured at fair value $ 1,440 $ 156 $ 202 $ 3 $ 1,079
Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets	Non-U.S. Defined Benefit Plans assets measured at fair value using significant unobservable inputs (Level 3), the following table summarizes the change in balances during 2018 and 2017: Year Ended October 31, 2018 2017 (in millions) Balance, beginning of year $ 3 $ 3 Realized gains — — Unrealized gains/(losses) — — Purchases, sales, issuances, and settlements — — Transfers in (out) — — Balance, end of year $ 3 $ 3 The
Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets	table below presents the combined projected benefit obligation ("PBO"), accumulated benefit obligation ("ABO") and fair value of plan assets, grouping plans using comparisons of the PBO and ABO relative to the plan assets as of October 31, 2018 and 2017: 2018 2017 Benefit Obligation Fair Value of Plan Assets Benefit Obligation Fair Value of Plan Assets PBO PBO (in millions) (in millions) U.S. defined benefit plans where PBO exceeds the fair value of plan assets $ 650 $ 575 $ 675 $ 515 U.S. defined benefit plans where fair value of plan assets exceeds PBO — — — — Total $ 650 $ 575 $ 675 $ 515 Non-U.S. defined benefit plans where PBO exceeds or is equal to the fair value of plan assets $ 363 $ 249 $ 378 $ 269 Non-U.S. defined benefit plans where fair value of plan assets exceeds PBO 886 1,143 960 1,171 Total $ 1,249 $ 1,392 $ 1,338 $ 1,440 ABO ABO U.S. defined benefit plans where ABO exceeds the fair value of plan assets $ 609 $ 575 $ 629 $ 515 U.S. defined benefit plans where the fair value of plan assets exceeds ABO — — — — Total $ 609 $ 575 $ 629 $ 515 Non-U.S. defined benefit plans where ABO exceeds or is equal to the fair value of plan assets $ 351 $ 249 $ 364 $ 269 Non-U.S. defined benefit plans where fair value of plan assets exceeds ABO 879 1,143 952 1,171 Total $ 1,230 $ 1,392 $ 1,316 $ 1,440 Cont
Schedule of Expected Benefit Payments	following table presents expected future benefit payments for the next 10 years . U.S. Defined Benefit Plans Non-U.S. Defined Benefit Plans U.S. Post-Retirement Benefit Plan (in millions) 2019 $ 39 $ 32 $ 18 2020 $ 41 $ 36 $ 18 2021 $ 46 $ 39 $ 17 2022 $ 48 $ 41 $ 16 2023 $ 52 $ 44 $ 16 2024 - 2028 $ 275 $ 238 $ 71 Assu
Schedule of Assumptions Used	mptions used to calculate the net periodic benefit cost (benefit) for the year ended October 31, 2018 and 2017 were as follows: For years ended October 31, 2018 2017 U.S. Defined Benefit Plans: Discount rate 3.75% 3.50% Average increase in compensation levels 3.00% 3.00% Expected long-term return on assets 7.50% 7.50% Non-U.S. Defined Benefit Plans: Discount rate 0.59-2.52% 0.40-2.63% Average increase in compensation levels 2.50-3.25% 2.50-3.50% Expected long-term return on assets 4.00-6.50% 4.00-6.50% U.S. Post-Retirement Benefits Plan: Discount rate 3.50% 3.50% Expected long-term return on assets 7.50% 7.50% Current medical cost trend rate 6.00% 6.00% Ultimate medical cost trend rate 3.50% 3.50% Medical cost trend rate decreases to ultimate rate in year 2029 2029 Assumptions used to calculate the benefit obligation as of October 31, 2018 and 2017 were as follows: As of the years ended October 31, 2018 2017 U.S. Defined Benefit Plans: Discount rate 4.50% 3.75 % Average increase in compensation levels 3.00% 3.00 % Non-U.S. Defined Benefit Plans: Discount rate 0.83-2.83% 0.59-2.52% Average increase in compensation levels 2.50-3.00% 2.50-3.25% U.S. Post-Retirement Benefits Plan: Discount rate 4.25% 3.50 % Current medical cost trend rate 6.00% 6.00 % Ultimate medical cost trend rate 4.00% 3.50 % Medical cost trend rate decreases to ultimate rate in year 2029 2029 Heal

GUARANTEES (Tables)

GUARANTEES (Tables)	12 Months Ended
	Oct. 31, 2018
Guarantees [Abstract]
Standard Warranty	Activity related to the standard warranty accrual, which is included in other accrued and other long-term liabilities in our consolidated balance sheet, is as follows: Year Ended October 31, 2018 2017 (in millions) Beginning balance $ 45 $ 44 Accruals for warranties, including change in estimates 36 33 Settlements made during the period (36 ) (32 ) Ending balance 45 $ 45 Accruals for warranties due within one year $ 25 $ 24 Accruals for warranties due after one year 20 21 Ending balance $ 45 $ 45

DEBT (Tables)

DEBT (Tables)	12 Months Ended
	Oct. 31, 2018
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	The following table summarizes the components of our short-term and long-term debt: October 31, 2018 2017 (in millions) 2019 Senior Notes at 3.30% ($500 face amount less unamortized costs of $1 and $2) $ 499 $ 498 2024 Senior Notes at 4.55% ($600 face amount less unamortized costs of $3 and $4) 597 596 2027 Senior Notes at 4.60% ($700 face amount less unamortized costs of $6 and $6) 694 694 Senior Unsecured Term loan — 260 Total Debt 1,790 2,048 Less: Short-term and current portion of long-term debt 499 10 Long-Term Debt $ 1,291 $ 2,038

STOCKHOLDERS' EQUITY (Tables)

STOCKHOLDERS' EQUITY (Tables)	12 Months Ended
	Oct. 31, 2018
Statement of Comprehensive Income [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table summarizes the components of our accumulated other comprehensive loss as of October 31, 2018 and 2017, net of tax effect: October 31, 2018 2017 (in millions) Unrealized gain on equity securities, net of tax (expense) of $(2) and $(5) $ — $ 14 Foreign currency translation, net of tax (expense) of $(63) and $(63) (60 ) (39 ) Unrealized losses on defined benefit plans, net of tax benefit of $81 and $82 (426 ) (433 ) Unrealized losses on derivative instruments, net of tax benefit (expense) of $(1) and $(2) (2 ) 1 Total accumulated other comprehensive loss $ (488 ) $ (457 ) Changes in accumulated other comprehensive income (loss) by component and related tax effects for the years ended October 31, 2018 and 2017 were as follows: Net defined benefit pension cost and post retirement plan costs: Unrealized gain (loss) on equity securities Foreign currency translation Actuarial Losses Prior service credits Unrealized gains (losses) on derivatives Total (in millions) At October 31, 2016 $ 10 $ (29 ) $ (646 ) $ 50 $ (3 ) $ (618 ) Other comprehensive income (loss) before reclassifications 5 (10 ) 177 — 6 178 Amounts reclassified out of accumulated other comprehensive income — — 69 (24 ) 1 46 Tax (expense) benefit (1 ) — (68 ) 9 (3 ) (63 ) Other comprehensive income (loss) for the twelve months ended October 31, 2017 4 (10 ) 178 (15 ) 4 161 At October 31, 2017 14 (39 ) (468 ) 35 1 (457 ) Other comprehensive income (loss) before reclassifications (17 ) (21 ) (23 ) — — (61 ) Amounts reclassified out of accumulated other comprehensive income — — 53 (22 ) (4 ) 27 Tax (expense) benefit 3 — (7 ) 6 1 3 Other comprehensive income (loss) for the twelve months ended October 31, 2018 (14 ) (21 ) 23 (16 ) (3 ) (31 ) At October 31, 2018 $ — $ (60 ) $ (445 ) $ 19 $ (2 ) $ (488 )
Reclassification out of Accumulated Other Comprehensive Income	Reclassifications out of accumulated other comprehensive loss for the years ended October 31, 2018 and 2017 were as follows: Details about accumulated other comprehensive loss components Amounts reclassified from other comprehensive loss Affected line item in statement of operations Year Ended October 31, 2018 2017 (in millions) Unrealized gain (loss) on derivatives $ 4 $ (1 ) Cost of products (1 ) 1 Provision for income tax 3 — Net of Income Tax Net defined benefit pension cost and post retirement plan costs: Net actuarial loss (53 ) (69 ) Prior service credit 22 24 (31 ) (45 ) Total before income tax 9 14 Provision for income tax (22 ) (31 ) Net of income tax Total reclassifications for the period $ (19 ) $ (31 )

SEGMENT INFORMATION (Tables)

SEGMENT INFORMATION (Tables)	12 Months Ended
	Oct. 31, 2018
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	The profitability of each of the segments is measured after excluding share-based compensation expense, restructuring and related costs, amortization of acquisition-related balances, acquisition and integration costs, acquisition-related compensation expense, separation and related costs, pension curtailment and settlement loss (gains), northern California wildfire-related costs, goodwill impairment, legal settlement, gain on divestitures, interest income, interest expense and other items as noted in the reconciliations below. Communications Solutions Group Electronic Industrial Solutions Group Ixia Solutions Group Services Solutions Group Total Segments (in millions) Year ended October 31, 2018: Total net revenue $ 2,036 $ 965 $ 416 $ 461 $ 3,878 Amortization of acquisition-related balances 1 — 35 — 36 Total segment revenue $ 2,037 $ 965 $ 451 $ 461 $ 3,914 Segment income from operations $ 454 $ 241 $ 21 $ 68 $ 784 Depreciation expense $ 51 $ 20 $ 16 $ 16 $ 103 Year ended October 31, 2017: Total net revenue $ 1,737 $ 836 $ 197 $ 419 $ 3,189 Amortization of acquisition-related balances 1 — 59 — 60 Total segment revenue $ 1,738 $ 836 $ 256 $ 419 $ 3,249 Segment income from operations $ 311 $ 199 $ 42 $ 68 $ 620 Depreciation expense $ 52 $ 20 $ 7 $ 13 $ 92 Year ended October 31, 2016: Total net revenue $ 1,740 $ 776 $ — $ 402 $ 2,918 Amortization of acquisition-related balances 12 — $ — $ — 12 Total segment revenue $ 1,752 $ 776 $ — $ 402 $ 2,930 Segment income from operations $ 314 $ 169 $ — $ 63 $ 546 Depreciation expense $ 53 $ 20 $ — $ 12 $ 85
Reconciliation of Operating Profit (Loss) from Segments to Consolidated	The following table reconciles reportable segments' income from operations to our total enterprise income before taxes: Year Ended October 31, 2018 2017 2016 (in millions) Total reportable segments' income from operations $ 784 $ 620 $ 546 Share-based compensation expense (59 ) (56 ) (49 ) Restructuring and related costs (17 ) (11 ) — Amortization of acquisition-related balances (265 ) (256 ) (56 ) Acquisition and integration costs (49 ) (57 ) (18 ) Acquisition-related compensation expense — (28 ) — Separation and related costs (2 ) (20 ) (24 ) Pension curtailment and settlement loss (gain) (1 ) 69 — Northern California wildfire-related costs (7 ) (16 ) — Goodwill impairment (709 ) — — Legal settlement (25 ) — — Gain on divestitures 20 — — Other (16 ) (6 ) 7 Income (loss) from operations, as reported (346 ) 239 406 Interest income 12 7 3 Interest expense (83 ) (80 ) (47 ) Other income (expense), net 6 13 4 Income (loss) before taxes, as reported $ (411 ) $ 179 $ 366
Assets And Capital Expenditures Directly Managed By Each Segment	The following table presents assets and capital expenditures directly managed by each segment. Unallocated assets primarily consist of cash and cash equivalents, investments, long-term and other receivables and other assets. Communications Solutions Group Electronic Industrial Solutions Group Ixia Solutions Group Services Solutions Group Total (in millions) As of October 31, 2018: Assets $ 1,854 $ 811 $ 1,327 $ 338 $ 4,330 Capital expenditures $ 63 $ 27 $ 10 $ 32 $ 132 As of October 31, 2017: Assets $ 1,739 $ 799 $ 2,063 $ 304 $ 4,905 Capital expenditures $ 36 $ 15 $ 7 $ 14 $ 72 The following table reconciles segment assets to our total assets: October 31, 2018 2017 (in millions) Total reportable segments' assets $ 4,330 $ 4,905 Cash and cash equivalents 913 818 Prepaid expenses 106 113 Other current assets 9 7 Investments 46 63 Long-term and other receivables 118 118 Other 302 (91 ) Total assets $ 5,824 $ 5,933
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas	The following table presents summarized information for net revenue and long-lived assets by geographic region. Revenues from external customers are generally attributed to countries based upon the location of the Keysight sales representative. Long lived assets consist of property, plant, and equipment, long-term receivables and other long-term assets excluding intangible assets. The rest of the world primarily consists of rest of Asia and Europe. United States China Japan Rest of the World Total (in millions) Net revenue: Year ended October 31, 2018 $ 1,398 $ 710 $ 342 $ 1,428 $ 3,878 Year ended October 31, 2017 $ 1,054 $ 608 $ 338 $ 1,189 $ 3,189 Year ended October 31, 2016 $ 1,009 $ 572 $ 323 $ 1,014 $ 2,918 United States Japan Malaysia UK Rest of the World Total (in millions) Long-lived assets: October 31, 2018 $ 310 $ 222 $ 72 $ 145 $ 121 $ 870 October 31, 2017 $ 280 $ 234 $ 73 $ 106 $ 126 $ 819

NORTHERN CALIFORNIA WILDFIRES_2

NORTHERN CALIFORNIA WILDFIRES IMPACT (Tables)	12 Months Ended
	Oct. 31, 2018
Unusual or Infrequent Items, or Both [Abstract]
Schedule of Unusual or Infrequent Items, or Both [Table Text Block]	A summary of the net charges in the consolidated statement of operations resulting from the impact of the fire is shown below: Year Ended October 31, 2018 Year Ended October 31, 2017 (in millions) Cost of products and services $ 5 $ 5 Research and development 1 1 Selling, general and administrative 1 8 Other operating expense (income), net — 2 Total $ 7 $ 16

OVERVIEW AND SUMMARY OF SIGNI_3

OVERVIEW AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Millions	12 Months Ended
	Oct. 31, 2018USD ($)	Oct. 31, 2017USD ($)segment	Oct. 31, 2016USD ($)	Oct. 31, 2014USD ($)
Property, Plant and Equipment [Line Items]
Binding contract to sell land				$ 34
Allowance for Doubtful Accounts Receivable, Current	$ 2	$ 3
Share-based compensation expense	$ 59	56	$ 49
Calculated warranty term	3 years
Advertising expense	$ 21	22	19
Investments, fair value		0
Cost method investment, carrying value		2
Impairment charge	$ 0	$ 0	2
Number of Reportable Segments	4
Goodwill impairment	$ 709	$ 0	0
Impairment of acquired finite-lived intangible assets	0	0	0
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	5	7
Cash and cash equivalent held outside US	$ 782
Effective US tax rate on certain earnings currently held outside of the U.S. are deemed to be repatriated to the U.S.	15.50%
Fair value of our long-term debt exceeeds (below) the carrying value	$ 3	91
Operating lease, term of renewal contract	10 years
Accrued vacation benefits	$ 80	72
Foreign currency translation net gain (loss)	4	1	0
Gain on sale of assets and divestitures	$ 20	8	10
Effective tax rate on certain cumulative foreign earnings in excess of foreign cash balances	8.00%
In Process Research and Development [Member]
Property, Plant and Equipment [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	$ 5	$ 7	$ 0
Minimum [Member]
Property, Plant and Equipment [Line Items]
Finite lived intangible assets useful life	2 months
Operating lease, term of contract	1 year
Maximum [Member]
Property, Plant and Equipment [Line Items]
Finite lived intangible assets useful life	10 years
Operating lease, term of contract	25 years
Machinery and equipment | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment - useful life	3 years
Machinery and equipment | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment - useful life	10 years
Software Development [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment - useful life	3 years

OVERVIEW AND SUMMARY OF SIGNI_4

OVERVIEW AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Acquisitions) (Details) - USD ($) $ in Millions	Aug. 31, 2017	Apr. 18, 2017	Oct. 31, 2017
Ixia [Member]
Business Acquisition [Line Items]
Acquisition effective date			Apr. 18, 2017
Payments to acquire business, net of cash acquired		$ 1,622
Cash acquired from acquisition		$ 72
ScienLab [Member]
Business Acquisition [Line Items]
Acquisition effective date			Aug. 31, 2017
Payments to acquire business, net of cash acquired	$ 60
Cash acquired from acquisition	$ 2

OVERVIEW AND SUMMARY OF SIGNI_5

OVERVIEW AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Restricted Cash (Details) - USD ($) $ in Millions	Oct. 31, 2018	Oct. 31, 2017
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted Cash and Cash Equivalents	$ 4
Other Assets [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted Cash and Cash Equivalents	2	$ 2
Other Current Assets [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted Cash and Cash Equivalents	$ 2

NEW ACCOUNTING PRONOUNCEMENTS A

NEW ACCOUNTING PRONOUNCEMENTS ASU 2014-09 (Details) - Accounting Standards Update 2014-09 [Member] $ in Millions	Oct. 31, 2018USD ($)
Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	$ 70
Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	$ 80

NEW ACCOUNTING PRONOUNCEMENTS_2

NEW ACCOUNTING PRONOUNCEMENTS ASU 2016-09 (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Excess Tax Benefit from Share-based Compensation	$ 5
Net Cash Provided by (Used in) Operating Activities	555	$ 328	$ 420
Net Cash Provided by (Used in) Financing Activities	(335)	1,425	(29)
Accounting Standards Update 2016-19 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment recorded to retained earnings	$ 6
Restatement Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net Cash Provided by (Used in) Operating Activities		15	4
Net Cash Provided by (Used in) Financing Activities		(15)	(4)
Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net Cash Provided by (Used in) Operating Activities		313	416
Net Cash Provided by (Used in) Financing Activities		$ 1,440	$ (25)

NEW ACCOUNTING PRONOUNCEMENTS_3

NEW ACCOUNTING PRONOUNCEMENTS ASU 2017-07 (Details) - Accounting Standards Update 2017-07 [Member] - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017
Operating Income (Loss) [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Operating Results	$ 48	$ 91
Other operating expense (income), net
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Operating Results	$ 48	$ 91

ACQUISITIONS (Narrative) (Detai

ACQUISITIONS (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	Aug. 31, 2017	Apr. 18, 2017	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired				$ 11	$ 1,702	$ 10
Deferred tax liability for intangible assets			$ 158	66	158
Acquisition related compensation expense paid in cash				$ 0	$ (28)	$ 0
Ixia [Member]
Business Acquisition [Line Items]
Acquisition effective date					Apr. 18, 2017
Business Acquisition, Date of Acquisition Agreement					Jan. 30, 2017
Payments to Acquire Businesses, Net of Cash Acquired		$ 1,622
Payments to acquire business, net of cash acquired		1,622
Cash acquired from acquisition		72
Deferred tax liability for intangible assets		186
Estimated cost to complete in process research and development		12
Cash and cash equivalents		$ 72
Business Acquisition, Share Price		$ 19.65
Business Combination, Consideration Transferred, Other		$ 47
Business Acquisition, Goodwill, Expected Tax Deductible Amount		$ 48
Discount rate used to value In Process R&D		14.00%
ScienLab [Member]
Business Acquisition [Line Items]
Acquisition effective date					Aug. 31, 2017
Payments to Acquire Businesses, Net of Cash Acquired	$ 60
Revenue of acquiree since acquisition date			1
Earnings or (loss) of acquiree since acquisition date			$ 2
Payments to acquire business, net of cash acquired	60
Cash acquired from acquisition	2
Deferred tax liability for intangible assets	13
Cash and cash equivalents	$ 2

ACQUISITIONS (Allocation of Pur

ACQUISITIONS (Allocation of Purchase Price) (Details) - USD ($) $ in Millions	Oct. 31, 2018	Oct. 31, 2017	Aug. 31, 2017	Apr. 18, 2017	Oct. 31, 2016
Business Acquisition [Line Items]
Goodwill	$ 1,171	$ 1,882			$ 736
ScienLab [Member]
Business Acquisition [Line Items]
Cash and cash equivalents			$ 2
Accounts receivable			3
Inventory			16
Other current assets			1
Goodwill			23
Intangible assets			40
Total assets acquired			85
Accounts payable			(1)
Deferred revenue			(3)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Income and other taxes payable			(2)
Current portion of long-term debt			(1)
Other long-term liabilities			(16)
Net assets acquired			$ 62
Ixia [Member]
Business Acquisition [Line Items]
Cash and cash equivalents				$ 72
Short-term investments				44
Accounts receivable				91
Inventory				107
Other current assets				34
Property, plant and equipment				50
Goodwill				1,117
Intangible assets				744
Other assets				4
Total assets acquired				2,263
Accounts payable				(10)
Employee compensation and benefits				(32)
Deferred revenue				(35)
Income and other taxes payable				(1)
Other accrued liabilities				(32)
Other long-term liabilities				(459)
Net assets acquired				$ 1,694

ACQUISITIONS (Intangible Assets

ACQUISITIONS (Intangible Assets Acquired) (Details) - USD ($) $ in Millions	Aug. 31, 2017	Apr. 18, 2017	Oct. 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Total intangible assets subject to amortization			$ 785
ScienLab [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total intangible assets	$ 40
ScienLab [Member] | Developed Product Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total intangible assets subject to amortization	$ 33
Finite lived intangible assets useful life	6 years
ScienLab [Member] | Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total intangible assets subject to amortization	$ 4
Finite lived intangible assets useful life	5 years
ScienLab [Member] | Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total intangible assets subject to amortization	$ 1
Finite lived intangible assets useful life	3 years
ScienLab [Member] | Trademarks and Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total intangible assets subject to amortization	$ 1
Finite lived intangible assets useful life	3 years
ScienLab [Member] | Backlog [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total intangible assets subject to amortization	$ 1
Finite lived intangible assets useful life	6 months
Ixia [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total intangible assets subject to amortization		$ 677
Total intangible assets		744
Ixia [Member] | In Process Research and Development [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
In-process research and development		67
Ixia [Member] | Developed Product Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total intangible assets subject to amortization		$ 423
Finite lived intangible assets useful life		4 years
Ixia [Member] | Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total intangible assets subject to amortization		$ 234
Finite lived intangible assets useful life		7 years
Ixia [Member] | Trademarks and Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total intangible assets subject to amortization		$ 12
Finite lived intangible assets useful life		3 years
Ixia [Member] | Backlog [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total intangible assets subject to amortization		$ 8
Finite lived intangible assets useful life		90 days

ACQUISITIONS (Pro Forma Informa

ACQUISITIONS (Pro Forma Information) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net revenue	$ 3,462	$ 3,413
Net income	$ 116	$ 231
Net income per share - Basic (in dollars per share)	$ 0.63	$ 1.26
Net income per share - Diluted (in dollars per share)	$ 0.62	$ 1.25

SHARE-BASED COMPENSATION (Gener

SHARE-BASED COMPENSATION (General Disclosures) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016	Nov. 16, 2017	Jul. 16, 2014
Incentive compensation plans [Abstract]
Incentive compensation plan, number of shares authorized (in shares)		17,000,000		21,800,000	25,000,000
Term of the 2014 Stock Plan (in years)	10 years
Common stock available for future awards under the 2014 Stock Plan (in shares)	9,000,000
Percentage which rate options generally vest per year (in hundredths)	25.00%
Maximum contractual term (in years)	10 years
Percentage market value of the common stock option exercise price is generally not less than (in hundredths)	100.00%
Time period after which participants of the performance stock award plan are entitled to receive unrestricted share of the company's stock, if specified performance targets are met	3 years
Percentage rate restricted stock units generally vest per year (in hundredths)	25.00%
Employee stock purchase plan [Abstract]
Compensation percentage maximum eligible contribution to purchase shares of common stock	10.00%
ESPP eligible employee common stock purchase price ratio	85.00%
Automatic annual increase in shares authorized for issuance in ESPP, without the Board of Directors determined amount, percentage (in hundredths)	1.00%
Common stock shares authorized and available for issuance under our ESPP (in shares)	75,000,000
ESPP Employee purchased shares (in shares)	885,110	1,085,382	1,234,111
ESPP employee purchases	$ 36	$ 32	$ 30
Number of common stock authorized and available for issuance under ESPP	21,302,108
Aggregate participant contributions	$ 23

SHARE-BASED COMPENSATION (Alloc

SHARE-BASED COMPENSATION (Allocated Share-based Compensation Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Share-based Compensation, Allocation and Classification in Financial Statements [Abstract]
Share-based compensation expense	$ 59	$ 56	$ 49
Employee Service Share Based Compensation Tax Benefit Realized From Exercise of Awards	5	3
Employee Service Share Based Compensation Tax Deficiency From Exercise Of awards			(5)
Cost of Products and Services [Member]
Share-based Compensation, Allocation and Classification in Financial Statements [Abstract]
Share-based compensation expense	11	11	11
Research and Development Expense [Member]
Share-based Compensation, Allocation and Classification in Financial Statements [Abstract]
Share-based compensation expense	10	9	8
Selling, General and Administrative Expenses [Member]
Share-based Compensation, Allocation and Classification in Financial Statements [Abstract]
Share-based compensation expense	$ 38	$ 36	$ 30

SHARE-BASED COMPENSATION (Fair

SHARE-BASED COMPENSATION (Fair Value Assumptions) (Details) - LTPP [Member]	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility of Keysight shares	25.00%	27.00%	25.00%
Volatility of selected peer-company shares minimum	14.00%	15.00%	14.00%
Volatility of selected peer-company shares maximum	14.00%	15.00%	54.00%
Price-wise correlation with selected peers	57.00%	57.00%	38.00%

SHARE-BASED COMPENSATION (Stock

SHARE-BASED COMPENSATION (Stock Option Activity) (Details) - $ / shares shares in Thousands	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning balance (in shares)	2,354
Granted (in shares)	0
Exercised (in shares)	(1,048)
Outstanding, ending balance (in shares)	1,306	2,354
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted-average exercise price per share, beginning of period (in dollars per share)	$ 27
Weighted-average exercise price per share, granted (in dollars per share)	0
Weighted-average exercise price per share, exercised (in dollars per share)	26	$ 20	$ 19
Weighted-average exercise price per share, end of period (in dollars per share)	$ 27	$ 27
Forfeited and expired options from total cancellations [Abstract]
Total options canceled (in shares)	0
Share-based Compensation Arrangement by Share-based Payment Award, Options forfeited and expired, Additional Disclosures [Abstract]
Weighted-average exercise price per share, total options cancelled (in dollars per share)	$ 0

SHARE-BASED COMPENSATION (Share

SHARE-BASED COMPENSATION (Shares Authorized by Exercise Price Range) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Sharebased Compensation Arrangement By Exercise Price Range [Abstract]
Number Outstanding (in shares)	1,306
Weighted Average Remaining Contractual Life (in years)	4 years 10 months 24 days
Weighted Average Exercise Price (in dollars per share)	$ 27
Aggregate Intrinsic Value	$ 39,081
Number Exercisable (in shares)	1,066
Weighted Average Remaining Contractual Life (in years)	4 years 7 months 6 days
Weighted Average Exercise Price (in dollars per share)	$ 26
Aggregate Intrinsic Value	$ 32,817
Closing stock price basis for aggregate intrinsic value (in dollars per share)	$ 57.08
In-the-money awards exercisable (in shares)	1,100
Aggregate instrinsic value of options [Abstract]
Options exercised in period aggregate intrinsic value	$ 28,985	$ 16,385	$ 5,656
Options exercised in period aggregate weighted average exercise price (in dollars per share)	$ 26	$ 20	$ 19
Unrecognized share-based compensation costs for outstanding stock option awards, net of expected forfeitures	$ 0
Range of Exercise Prices - $0 - $25 [Member]
Sharebased Compensation Arrangement By Exercise Price Range [Abstract]
Minimum price of options outstanding, end of the period (in dollars per share)	$ 0
Maximum price of options outstanding, end of the period (in dollars per share)	$ 25
Number Outstanding (in shares)	415
Weighted Average Remaining Contractual Life (in years)	3 years 1 month 6 days
Weighted Average Exercise Price (in dollars per share)	$ 20
Aggregate Intrinsic Value	$ 15,505
Number Exercisable (in shares)	415
Weighted Average Remaining Contractual Life (in years)	3 years 1 month 6 days
Weighted Average Exercise Price (in dollars per share)	$ 20
Aggregate Intrinsic Value	$ 15,505
Range of Exercise Prices - $25.01 - $30 [Member]
Sharebased Compensation Arrangement By Exercise Price Range [Abstract]
Minimum price of options outstanding, end of the period (in dollars per share)	$ 25.01
Maximum price of options outstanding, end of the period (in dollars per share)	$ 30
Number Outstanding (in shares)	288
Weighted Average Remaining Contractual Life (in years)	5 years 1 month 6 days
Weighted Average Exercise Price (in dollars per share)	$ 30
Aggregate Intrinsic Value	$ 7,836
Number Exercisable (in shares)	288
Weighted Average Remaining Contractual Life (in years)	5 years 1 month 6 days
Weighted Average Exercise Price (in dollars per share)	$ 30
Aggregate Intrinsic Value	$ 7,836
Range of Exercise Prices - $30.01 - $40 [Member]
Sharebased Compensation Arrangement By Exercise Price Range [Abstract]
Minimum price of options outstanding, end of the period (in dollars per share)	$ 30.01
Maximum price of options outstanding, end of the period (in dollars per share)	$ 40
Number Outstanding (in shares)	603
Weighted Average Remaining Contractual Life (in years)	6 years
Weighted Average Exercise Price (in dollars per share)	$ 31
Aggregate Intrinsic Value	$ 15,740
Number Exercisable (in shares)	363
Weighted Average Remaining Contractual Life (in years)	6 years
Weighted Average Exercise Price (in dollars per share)	$ 31
Aggregate Intrinsic Value	$ 9,476

SHARE-BASED COMPENSATION (Non-v

SHARE-BASED COMPENSATION (Non-vested Award Activity Disclosure) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested beginning (in shares)	3,640
Granted (in shares)	1,335
Vested (in shares)	(1,354)
Forfeited (in shares)	(155)
Change in LTP Program shares vested in the year due to performance conditions (in shares)	(107)
Non-vested ending (in shares)	3,359	3,640
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Non-vested beginning - Weighted Average Grant Price (in dollars per share)	$ 33
Granted - Weighted Average Grant Price (in dollars per share)	46
Vested - Weighted Average Grant Price (in dollars per share)	33
Forfeited - Weighted Average Grant Price (in dollars per share)	38
Change in LTP Program shares vested in the year due to performance conditions - Weighted Average Grant Price (in dollars per share)	31
Non-vested ending - Weighted Average Grant Price (in dollars per share)	$ 36	$ 33
Unrecognized share-based compensation costs for non-vested restricted stock awards, net of expected forfeitures	$ 53
Total fair value of restricted stock awards vested	$ 55	$ 43	$ 33
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost not yet recognized, period for recognition	2 years 1 month 6 days

INCOME TAXES (Details)

INCOME TAXES (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest [Abstract]
U.S. operations	$ (532)	$ (147)	$ (30)
Non-U.S. operations	121	326	396
Income (loss) before taxes	(411)	179	366
Income Tax Expense (Benefit), Continuing Operations [Abstract]
U.S. federal taxes - current	131	21	(15)
U.S. federal taxes - deferred	46	(56)	(13)
Non-U.S. taxes - current	75	101	32
Non-U.S. taxes - deferred	(832)	9	28
State taxes, net of federal benefit - current	7	2	(1)
State taxes, net of federal benefit - deferred	(3)	0	0
Total provision (benefit) for income taxes	(576)	77	31
Components of Deferred Tax Assets [Abstract]
Inventory	14	16
Intangibles	664	55
Property, plant and equipment	14	16
Warranty reserves	11	17
Pension benefits	47	90
Employee benefits, other than retirement	27	29
Net operating loss, capital loss, and credit carryforwards	120	257
Unremitted earnings of foreign subsidiaries	0	0
Share-based compensation	14	26
Deferred revenue	37	24
Other	11	10
Subtotal	959	540
Tax valuation allowance	(79)	(63)
Total deferred tax assets	880	477
Deferred Tax Liabilities, Gross [Abstract]
Inventory	0	(3)
Intangibles	(66)	(158)
Property, plant and equipment	(23)	(20)
Warranty reserves	(1)	(1)
Pension benefits	(67)	(58)
Deferred Tax Liabilities Employee Benefits	(1)	(1)
Net operating loss, capital loss, and credit carryforwards	0	0
Unremitted earnings of foreign subsidiaries	(5)	(305)
Share-based compensation	0	0
Deferred revenue	(1)	(3)
Other	(1)	(10)
Subtotal	(165)	(559)
Tax valuation allowance	0	0
Total deferred tax liabilities	(165)	(559)
Undistributed Earnings of Foreign Subsidiaries	91
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries	4
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Profit before tax times statutory rate	(96)	63	128
State income taxes, net of federal benefit	2	1	(1)
U.S. federal statutory tax rate change	10	0	0
Non-U.S. income taxed at different rates	16	(83)	(88)
Singapore tax incentives and amortization	(591)	0	0
U.S. transition tax and repatriation of foreign earnings	210	5	(42)
Foreign earnings not considered indefinitely reinvested	5	3	39
Remeasurement of deferred taxes on foreign earnings not considered indefinitely reinvested	(304)	0	0
Change in unrecognized tax benefits	86	23	1
U.S. research credits	(10)	(7)	(5)
Share-based compensation	(1)	7	5
Goodwill impairment	99	0	0
Malaysia tax assessment	0	68	0
Other, net	(2)	(3)	(6)
Total provision (benefit) for income taxes	$ (576)	$ 77	$ 31
Effective tax rate (in hundredths)	140.00%	43.00%	8.00%
Impact of the tax holidays decreased in income taxes	$ 567	$ 49	$ 34
The benefit of the tax holidays on net income per share (diluted)	$ 2.97	$ 0.27	$ 0.20
Benefit of tax incentive related to Singapore restructuring on EPS	$ 2.75
Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract]
Operating Loss Carryforwards	$ 11
Operating Loss Carryforwards Expiration Duration	2029 through 2036
US Capital Loss Carryforward	$ 3
US State net operating loss carryforwards	98
Tax credit carryforwards	$ 43
Tax Credit Carryforward Expiration Year	2,025
California Research Credits	$ 23
Foreign net operating loss carryforwards	508
Portion of this foreign loss which will expire in years beginning 2023 through 2027	128
Balance of this foreign loss with an indefinite life	380
Foreign Capital Loss Carryforwards	146
Tax Credit Carryforwards, Foreign	3
Amortization of Intangible Assets	204	$ 131	$ 43
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance, beginning of year	146	51	50
Additions due to acquisition	0	22	0
Additions for tax positions related to the current year	93	31	5
Additions for tax positions from prior years	2	52	1
Reductions for tax positions from prior years	(1)	(9)	(4)
Settlements with taxing authorities	(12)	0	0
Statute of limitations expirations	(1)	(1)	(1)
Balance, end of year	227	146	51
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	249
Unrecognized Tax Benefits that Would not Impact Effective Tax Rate	1
Interest and penalties relating to unrecognized tax benefits recognized	2	18	1
Interest and penalties accrued related to unrecognized tax benefits accrued and reported	$ 22	20	$ 2
Penalties paid for Malaysia tax assessment		$ 18

INCOME TAXES Components Of Defe

INCOME TAXES Components Of Deferred Tax Assets And Liabilities (Details) - USD ($) $ in Millions	Oct. 31, 2018	Oct. 31, 2017
Income Tax Disclosure [Abstract]
Current income tax assets (included within other current assets)	$ 32	$ 40
Current income tax liabilities (included within income and other taxes payable)	(18)	(7)
Long-term income tax assets (included within other assets)	0	0
Long-term income tax liabilities (included within other long-term liabilities)	(205)	(39)
Total	$ (191)	$ (6)

INCOME TAXES Income tax conting

INCOME TAXES Income tax contingencies (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2018
Income Tax Contingency [Line Items]
Income taxes and penalties on gains related to IP rights	$ 68
Internal Revenue Service (IRS) [Member]
Income Tax Contingency [Line Items]
Open Tax Year Date		Nov. 1, 2014
Foreign Tax Authority [Member]
Income Tax Contingency [Line Items]
Open Tax Year Date		Aug. 1, 2014
Foreign entities [Member]
Income Tax Contingency [Line Items]
Open Tax Year		2,007

NET INCOME PER SHARE (Details)

NET INCOME PER SHARE (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Numerator:
Net income	$ 165	$ 102	$ 335
Denominator:
Basic weighted-average shares	187	180	170
Potential common shares— stock options and other employee stock plans	4	2	2
Diluted weighted average shares	191	182	172
Weighted Average Number Diluted Shares Outstanding Adjustment	5	8

NET INCOME PER SHARE Antidiluti

NET INCOME PER SHARE Antidilutive securities (Details) - shares	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Employee Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	0	1,700,000
Stock options, ESPP, Performance shares, Restricted stock awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	2,803	7,760	26,200

SUPPLEMENTAL CASH FLOW INFORM_3

SUPPLEMENTAL CASH FLOW INFORMATION (Income Tax Payments) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Supplemental Cash Flow Elements [Abstract]
Income Taxes Paid, Net		$ 27	$ 121	$ 23
Income taxes and penalties on gains related to IP rights	$ 68

SUPPLEMENTAL CASH FLOW INFORM_4

SUPPLEMENTAL CASH FLOW INFORMATION (Interest On Senior Notes) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Supplemental Cash Flow Elements [Abstract]
Interest Paid, Including Capitalized Interest, Operating and Investing Activities	$ 79	$ 64	$ 44
Amortization of Debt Issuance Costs	$ 0	$ 9	$ 0

SUPPLEMENTAL CASH FLOW INFORM_5

SUPPLEMENTAL CASH FLOW INFORMATION Non-cash investing activities (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Other Significant Noncash Transactions [Line Items]
Increase (decrease) in capital expenditure incurred but not yet paid	$ 10	$ 0	$ (10)
Accounts Payable [Member]
Other Significant Noncash Transactions [Line Items]
Increase (decrease) in capital expenditure incurred but not yet paid	10	(4)	(11)
Other Noncurrent Liabilities [Member]
Other Significant Noncash Transactions [Line Items]
Increase (decrease) in capital expenditure incurred but not yet paid	$ 0	$ 4	$ 1

INVENTORY (Details)

INVENTORY (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Inventory-related excess and obsolescence charges	$ 25	$ 16	$ 17
Finished goods	283	286
Purchased parts and fabricated assemblies	336	302
Total inventory	619	$ 588
Discontinued Operations, Disposed of by Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Inventory-related excess and obsolescence charges	$ 7

PROPERTY, PLANT AND EQUIPMENT_3

PROPERTY, PLANT AND EQUIPMENT, NET (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 1,832	$ 1,749
Accumulated depreciation and amortization	(1,277)	(1,219)
Property, plant and equipment, net	555	530
Capital Leased Assets, Gross	4	4
Asset Impairment Charges		0	$ 0
Depreciation expense	103	92	$ 85
Land
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	63	63
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	695	678
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 1,074	$ 1,008

PROPERTY, PLANT AND EQUIPMENT_4

PROPERTY, PLANT AND EQUIPMENT, NET Land sale (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2014
Income Statement [Abstract]
Binding contract to sell land			$ 34
Gain (Loss) on Disposition of land	$ 8	$ 10

GOODWILL AND OTHER INTANGIBLE_3

GOODWILL AND OTHER INTANGIBLE ASSETS (Roll Forward) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2018
Goodwill - Rollforward
Beginning Balance	$ 1,882	$ 736
Foreign currency translation impact	(5)	(13)
Goodwill arising from acquisitions	6	1,159
Goodwill impairment	(709)	0	$ 0
Goodwill, Written off Related to Sale of Business Unit	(3)
Ending Balance	1,171	1,882	736
Goodwill, Gross				$ 1,880
Goodwill, Impaired, Accumulated Impairment Loss				(709)
Goodwill	1,882	736	736	1,171
Communications Solutions Group
Goodwill - Rollforward
Beginning Balance	441	456
Foreign currency translation impact	(2)	(15)
Goodwill arising from acquisitions	0	0
Goodwill impairment	0
Goodwill, Written off Related to Sale of Business Unit	(2)
Ending Balance	437	441	456
Goodwill, Gross				437
Goodwill, Impaired, Accumulated Impairment Loss				0
Goodwill	441	456	456	437
Electronic Industrial Solutions Group
Goodwill - Rollforward
Beginning Balance	240	216
Foreign currency translation impact	(2)	1
Goodwill arising from acquisitions	0	23
Goodwill impairment	0
Goodwill, Written off Related to Sale of Business Unit	(1)
Ending Balance	237	240	216
Goodwill, Gross				237
Goodwill	240	216	216	237
Ixia Solutions Group [Member]
Goodwill - Rollforward
Beginning Balance	1,117	0
Foreign currency translation impact	(1)	0
Goodwill arising from acquisitions	0	1,117
Goodwill impairment	709
Goodwill, Written off Related to Sale of Business Unit	0
Ending Balance	407	1,117	0
Goodwill, Gross				1,116
Goodwill, Impaired, Accumulated Impairment Loss				(709)
Goodwill	1,117	0	0	407
Services Solutions Group
Goodwill - Rollforward
Beginning Balance	84	64
Foreign currency translation impact	0	1
Goodwill arising from acquisitions	6	19
Goodwill impairment	0
Goodwill, Written off Related to Sale of Business Unit	0
Ending Balance	90	84	64
Goodwill, Gross				90
Goodwill, Impaired, Accumulated Impairment Loss				0
Goodwill	$ 84	$ 64	$ 64	$ 90

GOODWILL AND OTHER INTANGIBLE_4

GOODWILL AND OTHER INTANGIBLE ASSETS (Disclosures and Components of Other Intangibles) (Details) - USD ($) $ in Millions	Oct. 31, 2018	Oct. 31, 2017
Schedule of Other Intangible Assets By Major Class [Abstract]
Gross Carrying Amount	$ 1,186	$ 1,159
Accumulated Amortization and Impairments	542	333
Total amortizable intangible assets	644	826
In-Process R&D	1	29
Gross Book Value	1,187	1,188
Net Book Value	645	855
Developed Technology [Member]
Schedule of Other Intangible Assets By Major Class [Abstract]
Gross Carrying Amount	835	808
Accumulated Amortization and Impairments	415	252
Net Book Value	420	556
Backlog [Member]
Schedule of Other Intangible Assets By Major Class [Abstract]
Gross Carrying Amount	13	13
Accumulated Amortization and Impairments	13	12
Net Book Value	0	1
Trademarks/Trade Name [Member]
Schedule of Other Intangible Assets By Major Class [Abstract]
Gross Carrying Amount	33	33
Accumulated Amortization and Impairments	14	8
Net Book Value	19	25
Customer Relationships [Member]
Schedule of Other Intangible Assets By Major Class [Abstract]
Gross Carrying Amount	304	304
Accumulated Amortization and Impairments	100	61
Net Book Value	204	243
Noncompete Agreements [Member]
Schedule of Other Intangible Assets By Major Class [Abstract]
Gross Carrying Amount	1	1
Accumulated Amortization and Impairments	0	0
Net Book Value	$ 1	$ 1

GOODWILL AND OTHER INTANGIBLE_5

GOODWILL AND OTHER INTANGIBLE ASSETS (Finite-Lived Assets and Future Amortization Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill arising from acquisitions	$ 6	$ 1,159
Intangible assets acquired from an acquisition		785
Finite-Lived Intangible Assets, Translation Adjustments	1	0
Finite-Lived Intangible Assets, Period Increase (Decrease)	23	43
Amortization of Intangible Assets	204	131	$ 43
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	5	$ 7
Amortization Expense, Maturity Schedule [Abstract]
2,019	203
2,020	196
2,021	128
2,022	52
2,023	44
Thereafter	$ 21

INVESTMENTS (Details)

INVESTMENTS (Details) - USD ($) $ in Millions	Oct. 31, 2018	Oct. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Cost method investments	$ 16	$ 16
Trading securities	13	13
Available-for-sale investments	17	34
Total	46	63
Long Term Equity Securities
Cost	15	15
Gross Unrealized Gains	2	19
Gross Unrealized Losses	0	0
Estimated Fair Value	$ 17	$ 34

INVESTMENTS (Narratives) (Detai

INVESTMENTS (Narratives) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Cost method investment, carrying value		$ 2
Investments, fair value		0
Impairment charge	$ 0	0	$ 2
Realized gains on sale of available-for-sale securities	0	0	0
Change in unrealized holding gain (loss) for trading securities	0	2	0
Realized gains on sale of cost method securities	$ 0	$ 0	$ 0

FAIR VALUE MEASUREMENTS (Fair V

FAIR VALUE MEASUREMENTS (Fair Value of Assets and Liabilities Measured on a Recurring Basis) (Details) - USD ($) $ in Millions	Oct. 31, 2018	Oct. 31, 2017
Assets, Long-term [Abstract]
Trading securities	$ 13	$ 13
Fair Value, Measurements, Recurring [Member]
Assets, Short-term [Abstract]
Cash equivalents (money market funds)	484	403
Foreign Currency Contract, Asset, Fair Value Disclosure	6	6
Assets, Long-term [Abstract]
Trading securities	13	13
Available-for-sale investments	17	34
Assets, Fair Value Disclosure	520	456
Liabilities, Short-term [Abstract]
Foreign Currency Contracts, Liability, Fair Value Disclosure	6	1
Liabilities, Long-term [Abstract]
Deferred compensation liability	13	13
Financial and Nonfinancial Liabilities, Fair Value Disclosure	19	14
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets, Short-term [Abstract]
Cash equivalents (money market funds)	484	403
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Assets, Long-term [Abstract]
Trading securities	13	13
Available-for-sale investments	17	34
Assets, Fair Value Disclosure	514	450
Liabilities, Short-term [Abstract]
Foreign Currency Contracts, Liability, Fair Value Disclosure	0	0
Liabilities, Long-term [Abstract]
Deferred compensation liability	0	0
Financial and Nonfinancial Liabilities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2)
Assets, Short-term [Abstract]
Cash equivalents (money market funds)	0	0
Foreign Currency Contract, Asset, Fair Value Disclosure	6	6
Assets, Long-term [Abstract]
Trading securities	0	0
Available-for-sale investments	0	0
Assets, Fair Value Disclosure	6	6
Liabilities, Short-term [Abstract]
Foreign Currency Contracts, Liability, Fair Value Disclosure	6	1
Liabilities, Long-term [Abstract]
Deferred compensation liability	13	13
Financial and Nonfinancial Liabilities, Fair Value Disclosure	19	14
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3)
Assets, Short-term [Abstract]
Cash equivalents (money market funds)	0	0
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Assets, Long-term [Abstract]
Trading securities	0	0
Available-for-sale investments	0	0
Assets, Fair Value Disclosure	0	0
Liabilities, Short-term [Abstract]
Foreign Currency Contracts, Liability, Fair Value Disclosure	0	0
Liabilities, Long-term [Abstract]
Deferred compensation liability	0	0
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 0	$ 0

DERIVATIVES (Additional Informa

DERIVATIVES (Additional Information) (Details) $ in Millions	12 Months Ended
	Oct. 31, 2018USD ($)	Oct. 31, 2017	Oct. 31, 2016
Derivative [Line Items]
Cash Flow Hedge Ineffectiveness	not significant	not significant	not significant
Derivative, net liability position, aggregate fair value	$ 4
Cash flow hedge loss to be reclassified within twelve months	$ 0
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative, number of contracts	63
Foreign Exchange Forward [Member] | Cash Flow Hedges [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative, number of contracts	159
Foreign Exchange Option [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative, number of contracts	0

DERIVATIVES (Aggregated Notiona

DERIVATIVES (Aggregated Notional Amounts by Currency and Designation) (Details) - Forward Contracts Buy/(Sell) [Member] $ in Millions	Oct. 31, 2018USD ($)
Designated as Hedging Instrument [Member] | Long [Member] | Cash Flow Hedges [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 25
Not Designated as Hedging Instrument [Member] | Long [Member]
Derivative [Line Items]
Derivative, Notional Amount	74
Euro [Member] | Designated as Hedging Instrument [Member] | Long [Member] | Cash Flow Hedges [Member]
Derivative [Line Items]
Derivative, Notional Amount	14
Euro [Member] | Not Designated as Hedging Instrument [Member] | Long [Member]
Derivative [Line Items]
Derivative, Notional Amount	95
British Pound [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedges [Member]
Derivative [Line Items]
Derivative, Notional Amount	0
British Pound [Member] | Not Designated as Hedging Instrument [Member] | Short [Member]
Derivative [Line Items]
Derivative, Notional Amount	28
Singapore Dollar [Member] | Designated as Hedging Instrument [Member] | Long [Member] | Cash Flow Hedges [Member]
Derivative [Line Items]
Derivative, Notional Amount	15
Singapore Dollar [Member] | Not Designated as Hedging Instrument [Member] | Long [Member]
Derivative [Line Items]
Derivative, Notional Amount	1
Malaysian Ringgit [Member] | Designated as Hedging Instrument [Member] | Long [Member] | Cash Flow Hedges [Member]
Derivative [Line Items]
Derivative, Notional Amount	79
Malaysian Ringgit [Member] | Not Designated as Hedging Instrument [Member] | Long [Member]
Derivative [Line Items]
Derivative, Notional Amount	1
Japanese Yen [Member] | Designated as Hedging Instrument [Member] | Short [Member] | Cash Flow Hedges [Member]
Derivative [Line Items]
Derivative, Notional Amount	86
Japanese Yen [Member] | Not Designated as Hedging Instrument [Member] | Short [Member]
Derivative [Line Items]
Derivative, Notional Amount	1
Other [Member] | Designated as Hedging Instrument [Member] | Long [Member] | Cash Flow Hedges [Member]
Derivative [Line Items]
Derivative, Notional Amount	3
Other [Member] | Not Designated as Hedging Instrument [Member] | Long [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 6

DERIVATIVES (Fair Value and Bal

DERIVATIVES (Fair Value and Balance Sheet Location) (Details) - USD ($) $ in Millions	Oct. 31, 2018	Oct. 31, 2017
Derivative [Line Items]
Derivative Asset, Fair Value	$ 6	$ 6
Derivative Liability, Fair Value	6	1
Designated as Hedging Instrument [Member] | Cash Flow Hedges [Member] | Foreign Exchange Contract [Member] | Other Current Assets [Member]
Derivative [Line Items]
Derivative Asset, Fair Value	5	5
Designated as Hedging Instrument [Member] | Cash Flow Hedges [Member] | Foreign Exchange Contract [Member] | Other Accrued Liabilities [Member]
Derivative [Line Items]
Derivative Liability, Fair Value	4	0
Derivatives Not Designated as Hedging Instruments [Member] | Foreign Exchange Contract [Member] | Other Current Assets [Member]
Derivative [Line Items]
Derivative Asset, Fair Value	1	1
Derivatives Not Designated as Hedging Instruments [Member] | Foreign Exchange Contract [Member] | Other Accrued Liabilities [Member]
Derivative [Line Items]
Derivative Liability, Fair Value	$ 2	$ 1

DERIVATIVES (Effect on Statemen

DERIVATIVES (Effect on Statement of Operations) (Details) - Foreign Exchange Contract [Member] - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Derivatives Not Designated as Hedging Instruments [Member] | Other Income (Expense) [Member]
Derivative [Line Items]
Gain (loss) recognized in other income (expense), net	$ 4	$ 6	$ (10)
Cash Flow Hedges [Member] | Designated as Hedging Instrument [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
Derivative [Line Items]
Gain (loss) recognized in accumulated other comprehensive income	0	6	(7)
Cash Flow Hedges [Member] | Designated as Hedging Instrument [Member] | Cost of Products and Services [Member]
Derivative [Line Items]
Gain (loss) reclassified from accumulated other comprehensive income into cost of products	$ 4	$ (1)	$ (12)

RETIREMENT PLANS AND POST RET_3

RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Narrative) (Details) $ in Millions	12 Months Ended
	Oct. 31, 2018USD ($)year	Oct. 31, 2017USD ($)	Oct. 31, 2016USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accumulated other comprehensive loss, net of tax	$ (426)	$ (433)
Employer match percentage, maximum	4.00%
Employee deferral percentage, maximum	50.00%
Cost recognized	$ 23	16	$ 14
Employee gross pay, match percent	6.00%
Deferred Profit-Sharing Plan | Other Pension, Postretirement and Supplemental Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	$ 268
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	172	182	171
Benefit obligation	$ 190	207	214
Eligible retirees who were less than 50 years old as of January 1, 2005, retirement age (years) | year	55
Eligible retirees who were less than 50 years old as of January 1, 2005, service period (years)	15 years
Eligible retirees who were less than 50 years old as of January 1, 2005, retirement age for workforce managed terminations (years) | year	54
Eligible retirees who were less than 50 years old as of January 1, 2005, service period for workforce managed terminations (years)	14 years
Eligible retirees who were at least 50 years old as of January 1, 2005, retirement age (years) | year	55
Eligible retirees who were at least 50 years old as of January 1, 2005, service period (years)	15 years
Eligible retirees who were at least 50 years old as of January 1, 2005, retirement age for workforce managed terminations (years) | year	54
Eligible retirees who were at least 50 years old as of January 1, 2005, service period for workforce managed terminations (years)	14 years
Retirement age benchmark for subsidy (years) | year	65
Employer contributions	$ 0	0
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	0
Domestic Plan [Member] | Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	575	515	464
Benefit obligation	650	675	610
Employer contributions	85	0
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	0
Foreign Plan [Member] | Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	1,392	1,440	1,317
Benefit obligation	1,249	1,338	$ 1,508
Employer contributions	33	$ 34
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 33

RETIREMENT PLANS AND POST RET_4

RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Components) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Domestic Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Net Actuarial Gain Loss Before Tax	$ 112	$ 135
Pension And Other Postretirement Defined Benefit Plans Employee Compensation and Benefits	(1)	(1)
Net periodic benefit cost (benefit) [Abstract]
Service cost — benefits earned during the period	24	22	$ 21
Interest cost on benefit obligation	25	21	22
Expected return on plan assets	(37)	(33)	(37)
Net actuarial loss	12	15	9
Prior service credit	(7)	(8)	(7)
Net periodic benefit cost (benefit)	17	17	8
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	0	0	0
Total periodic benefit cost (benefit)	17	17	8
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss [Abstract]
Net actuarial loss (gain)	(11)	4	60
Net actuarial loss	(12)	(15)	(9)
Prior service credit	7	8	7
Settlement	0	0	0
Curtailment	0	0	0
Foreign currency	0	0	0
Total recognized in other comprehensive (income) loss	(16)	(3)	58
Total recognized in net periodic benefit cost (benefit) and other comprehensive (income) loss	1	14	66
Change in fair value of plan assets: [Roll Forward]
Fair value — beginning of year	515	464
Actual return on plan assets	6	72
Employer contributions	85	0
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	0
Defined Benefit Plan, Plan Assets, Benefits Paid	(31)	(21)
Currency impact	0	0
Fair value — end of year	575	515	464
Change in benefit obligation: [Roll Forward]
Benefit obligation — beginning of year	675	610
Service cost	24	22
Interest cost	25	21	22
Settlements	0	0
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment	0	0
Actuarial loss (gain)	(43)	(43)
Benefits paid	31	(21)
Currency impact	0	0
Benefit obligation — end of year	650	675	610
Funded status of plan [Abstract]
Overfunded (Underfunded) status of PBO	(75)	(160)
Other assets	0	0
Liability, Defined Benefit Plan	(74)	(159)
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Net Actuarial Gain Loss Before Tax	28	45
Pension And Other Postretirement Defined Benefit Plans Employee Compensation and Benefits	0	0
Net periodic benefit cost (benefit) [Abstract]
Service cost — benefits earned during the period	1	1	1
Interest cost on benefit obligation	7	7	9
Expected return on plan assets	(13)	(11)	(14)
Net actuarial loss	16	21	20
Prior service credit	(14)	(15)	(17)
Net periodic benefit cost (benefit)	(3)	3	(1)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	0	0	0
Total periodic benefit cost (benefit)	(3)	3	(1)
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss [Abstract]
Net actuarial loss (gain)	(1)	(16)	5
Net actuarial loss	(16)	(21)	(20)
Prior service credit	14	15	17
Settlement	0	0	0
Curtailment	0	0	0
Foreign currency	0	0	0
Total recognized in other comprehensive (income) loss	(3)	(22)	2
Total recognized in net periodic benefit cost (benefit) and other comprehensive (income) loss	(6)	(19)	1
Change in fair value of plan assets: [Roll Forward]
Fair value — beginning of year	182	171
Actual return on plan assets	3	26
Employer contributions	0	0
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	0
Defined Benefit Plan, Plan Assets, Benefits Paid	(13)	(15)
Currency impact	0	0
Fair value — end of year	172	182	171
Change in benefit obligation: [Roll Forward]
Benefit obligation — beginning of year	207	214
Service cost	1	1
Interest cost	7	7	9
Settlements	0	0
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment	0	0
Actuarial loss (gain)	(12)
Benefits paid	13	(15)
Currency impact	0	0
Benefit obligation — end of year	190	207	214
Funded status of plan [Abstract]
Overfunded (Underfunded) status of PBO	(18)	(25)
Other assets	0	0
Liability, Defined Benefit Plan	(18)	(25)
Foreign Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Net Actuarial Gain Loss Before Tax	396	385
Pension And Other Postretirement Defined Benefit Plans Employee Compensation and Benefits	0	0
Net periodic benefit cost (benefit) [Abstract]
Service cost — benefits earned during the period	14	18	19
Interest cost on benefit obligation	23	23	32
Expected return on plan assets	(85)	(74)	(74)
Net actuarial loss	25	33	27
Prior service credit	(1)	(1)	(1)
Net periodic benefit cost (benefit)	(24)	(1)	3
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	1	(69)	0
Total periodic benefit cost (benefit)	(23)	(70)	3
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss [Abstract]
Net actuarial loss (gain)	41	(145)	188
Net actuarial loss	(25)	(33)	(27)
Prior service credit	1	1	1
Settlement	(1)	(24)	0
Curtailment	0	1	0
Foreign currency	(5)	1	(5)
Total recognized in other comprehensive (income) loss	11	(199)	157
Total recognized in net periodic benefit cost (benefit) and other comprehensive (income) loss	(12)	(269)	160
Change in fair value of plan assets: [Roll Forward]
Fair value — beginning of year	1,440	1,317
Actual return on plan assets	2	136
Employer contributions	33	34
Defined Benefit Plan, Plan Assets, Payment for Settlement	(6)	(51)
Defined Benefit Plan, Plan Assets, Benefits Paid	(42)	(42)
Currency impact	(35)	46
Fair value — end of year	1,392	1,440	1,317
Change in benefit obligation: [Roll Forward]
Benefit obligation — beginning of year	1,338	1,508
Service cost	14	18
Interest cost	23	23	32
Settlements	6	142
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment	0	(12)
Actuarial loss (gain)	(43)	(69)
Benefits paid	(42)	(42)
Currency impact	(35)	54
Benefit obligation — end of year	1,249	1,338	$ 1,508
Funded status of plan [Abstract]
Overfunded (Underfunded) status of PBO	143	102
Other assets	257	211
Liability, Defined Benefit Plan	$ (114)	$ (109)

RETIREMENT PLANS AND POST RET_5

RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Financial Statement Location) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017
Domestic Plan [Member] | Pension Plan [Member]
Amounts recognized in the consolidated balance sheet [Abstract]
Other assets	$ 0	$ 0
Employee compensation and benefits	(1)	(1)
Retirement and post-retirement benefits	(74)	(159)
Net asset (liability)	(75)	(160)
Amounts Recognized in Accumulated Other Comprehensive Income (loss): [Abstract]
Actuarial losses	112	135
Prior service cost (credits)	(4)	(11)
Total	108	124
Accumulated other comprehensive income expected to be recognized as components of net expense during the next fiscal year [Abstract]
Amortization of net prior service cost (benefit)	(4)
Amortization of actuarial net loss (gain)	10
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member]
Amounts recognized in the consolidated balance sheet [Abstract]
Other assets	0	0
Employee compensation and benefits	0	0
Retirement and post-retirement benefits	(18)	(25)
Net asset (liability)	(18)	(25)
Amounts Recognized in Accumulated Other Comprehensive Income (loss): [Abstract]
Actuarial losses	28	45
Prior service cost (credits)	(28)	(42)
Total	0	3
Accumulated other comprehensive income expected to be recognized as components of net expense during the next fiscal year [Abstract]
Amortization of net prior service cost (benefit)	(14)
Amortization of actuarial net loss (gain)	9
Foreign Plan [Member] | Pension Plan [Member]
Amounts recognized in the consolidated balance sheet [Abstract]
Other assets	257	211
Employee compensation and benefits	0	0
Retirement and post-retirement benefits	(114)	(109)
Net asset (liability)	143	102
Amounts Recognized in Accumulated Other Comprehensive Income (loss): [Abstract]
Actuarial losses	396	385
Prior service cost (credits)	(1)	(1)
Total	395	$ 384
Accumulated other comprehensive income expected to be recognized as components of net expense during the next fiscal year [Abstract]
Amortization of net prior service cost (benefit)	(1)
Amortization of actuarial net loss (gain)	$ 28

RETIREMENT PLANS AND POST RET_6

RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Target Allocations) (Details)	Oct. 31, 2018
Domestic Plan [Member] | Pension Plan [Member] | Equity
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Plan Assets	70.00%
Domestic Plan [Member] | Pension Plan [Member] | Fixed income investments
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Plan Assets	30.00%
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Equity
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Plan Assets	70.00%
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Fixed income investments
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Plan Assets	30.00%
Deferred Profit-Sharing Plan | Domestic Plan [Member] | Other Pension, Postretirement and Supplemental Plans [Member] | Equity
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Plan Assets	60.00%
Deferred Profit-Sharing Plan | Domestic Plan [Member] | Other Pension, Postretirement and Supplemental Plans [Member] | Fixed income investments
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Plan Assets	40.00%
Minimum [Member] | Foreign Plan [Member] | Pension Plan [Member] | Equity
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Plan Assets	20.00%
Minimum [Member] | Foreign Plan [Member] | Pension Plan [Member] | Real estate investments
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Plan Assets	0.00%
Minimum [Member] | Foreign Plan [Member] | Pension Plan [Member] | Fixed income investments
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Plan Assets	40.00%
Minimum [Member] | Foreign Plan [Member] | Pension Plan [Member] | Cash
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Plan Assets	0.00%
Maximum [Member] | Foreign Plan [Member] | Pension Plan [Member] | Equity
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Plan Assets	60.00%
Maximum [Member] | Foreign Plan [Member] | Pension Plan [Member] | Real estate investments
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Plan Assets	20.00%
Maximum [Member] | Foreign Plan [Member] | Pension Plan [Member] | Fixed income investments
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Plan Assets	80.00%
Maximum [Member] | Foreign Plan [Member] | Pension Plan [Member] | Cash
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Plan Assets	14.00%

RETIREMENT PLANS AND POST RET_7

RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (By Fair Value Hierarchy) (Details) - USD ($) $ in Millions	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Foreign Plan [Member] | Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	$ 1,392	$ 1,440	$ 1,317
Other assets	257	211
Foreign Plan [Member] | Pension Plan [Member] | Cash and cash equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Foreign Plan [Member] | Pension Plan [Member] | Cash and cash equivalents at NAV [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Foreign Plan [Member] | Pension Plan [Member] | Equity
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	791	757
Foreign Plan [Member] | Pension Plan [Member] | Equity at NAV [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	656	599
Foreign Plan [Member] | Pension Plan [Member] | Fixed income
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	595	677
Foreign Plan [Member] | Pension Plan [Member] | Fixed Income securities at NAV [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	387	477
Foreign Plan [Member] | Pension Plan [Member] | Other investments
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	6	6
Foreign Plan [Member] | Pension Plan [Member] | Other assets at NAV [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	3	3
Foreign Plan [Member] | Pension Plan [Member] | Total assets at NAV [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	1,046	1,079
Foreign Plan [Member] | Pension Plan [Member] | Significant Other Observable Inputs (Level 2)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	208	202
Foreign Plan [Member] | Pension Plan [Member] | Significant Other Observable Inputs (Level 2) | Cash and cash equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Foreign Plan [Member] | Pension Plan [Member] | Significant Other Observable Inputs (Level 2) | Equity
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	2
Foreign Plan [Member] | Pension Plan [Member] | Significant Other Observable Inputs (Level 2) | Fixed income
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	208	200
Foreign Plan [Member] | Pension Plan [Member] | Significant Other Observable Inputs (Level 2) | Other investments
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Foreign Plan [Member] | Pension Plan [Member] | Significant Unobservable Inputs (Level 3)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	3	3	3
Foreign Plan [Member] | Pension Plan [Member] | Significant Unobservable Inputs (Level 3) | Cash and cash equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Foreign Plan [Member] | Pension Plan [Member] | Significant Unobservable Inputs (Level 3) | Equity
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Foreign Plan [Member] | Pension Plan [Member] | Significant Unobservable Inputs (Level 3) | Fixed income
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Foreign Plan [Member] | Pension Plan [Member] | Significant Unobservable Inputs (Level 3) | Other investments
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	3	3
Foreign Plan [Member] | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	135	156
Foreign Plan [Member] | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash and cash equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Foreign Plan [Member] | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	135	156
Foreign Plan [Member] | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed income
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Foreign Plan [Member] | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other investments
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Domestic Plan [Member] | Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	575	515	464
Other assets	0	0
Domestic Plan [Member] | Pension Plan [Member] | Cash and cash equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	4	5
Domestic Plan [Member] | Pension Plan [Member] | Cash and cash equivalents at NAV [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Domestic Plan [Member] | Pension Plan [Member] | Equity
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	392	371
Domestic Plan [Member] | Pension Plan [Member] | Equity at NAV [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	271	256
Domestic Plan [Member] | Pension Plan [Member] | Fixed income
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	179	139
Domestic Plan [Member] | Pension Plan [Member] | Fixed Income securities at NAV [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	71	48
Domestic Plan [Member] | Pension Plan [Member] | Other investments
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Domestic Plan [Member] | Pension Plan [Member] | Other assets at NAV [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Domestic Plan [Member] | Pension Plan [Member] | Total assets at NAV [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	342	304
Domestic Plan [Member] | Pension Plan [Member] | Significant Other Observable Inputs (Level 2)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	99	81
Domestic Plan [Member] | Pension Plan [Member] | Significant Other Observable Inputs (Level 2) | Cash and cash equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	4	5
Domestic Plan [Member] | Pension Plan [Member] | Significant Other Observable Inputs (Level 2) | Equity
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	1	1
Domestic Plan [Member] | Pension Plan [Member] | Significant Other Observable Inputs (Level 2) | Fixed income
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	94	75
Domestic Plan [Member] | Pension Plan [Member] | Significant Other Observable Inputs (Level 2) | Other investments
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Domestic Plan [Member] | Pension Plan [Member] | Significant Unobservable Inputs (Level 3)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Domestic Plan [Member] | Pension Plan [Member] | Significant Unobservable Inputs (Level 3) | Cash and cash equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Domestic Plan [Member] | Pension Plan [Member] | Significant Unobservable Inputs (Level 3) | Equity
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Domestic Plan [Member] | Pension Plan [Member] | Significant Unobservable Inputs (Level 3) | Fixed income
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Domestic Plan [Member] | Pension Plan [Member] | Significant Unobservable Inputs (Level 3) | Other investments
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Domestic Plan [Member] | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	134	130
Domestic Plan [Member] | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash and cash equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Domestic Plan [Member] | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	120	114
Domestic Plan [Member] | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed income
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	14	16
Domestic Plan [Member] | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other investments
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	172	182	$ 171
Other assets	0	0
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Cash and cash equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	1	3
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Cash and cash equivalents at NAV [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Equity
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	120	132
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Equity at NAV [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	83	91
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Fixed income
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	51	47
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Fixed Income securities at NAV [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	20	17
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Other investments
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Other assets at NAV [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Total assets at NAV [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	103	108
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Significant Other Observable Inputs (Level 2)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	28	27
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Significant Other Observable Inputs (Level 2) | Cash and cash equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	1	2
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Significant Other Observable Inputs (Level 2) | Equity
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Significant Other Observable Inputs (Level 2) | Fixed income
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	27	25
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Significant Other Observable Inputs (Level 2) | Other investments
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Significant Unobservable Inputs (Level 3)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Significant Unobservable Inputs (Level 3) | Cash and cash equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Significant Unobservable Inputs (Level 3) | Equity
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Significant Unobservable Inputs (Level 3) | Fixed income
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Significant Unobservable Inputs (Level 3) | Other investments
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	0
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	41	47
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash and cash equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	0	1
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	37	41
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed income
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	4	5
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other investments
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets	$ 0	$ 0

RETIREMENT PLANS AND POST RET_8

RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Assets Measured at Fair Value Using Significant Unobservable Inputs) (Level 3) (Details) - Foreign Plan [Member] - Pension Plan [Member] - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Fair value — beginning of year	$ 1,440	$ 1,317
Fair value — end of year	1,392	1,440
Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Fair value — beginning of year	3	3
Realized gains	0	0
Unrealized gains/(losses)	0	0
Purchases, sales, issuances, and settlements	0	0
Transfers in (out)	0	0
Fair value — end of year	$ 3	$ 3

RETIREMENT PLANS AND POST RET_9

RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (PBO, ABO, and Fair Value of Plan Assets) (Details) - Pension Plan [Member] - USD ($) $ in Millions	Oct. 31, 2018	Oct. 31, 2017
Domestic Plan [Member]
Projected benefit obligation and fair value of plan assets [Abstract]
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation	$ 650	$ 675
Fair value of plan assets in excess of projected benefit obligation - aggregate benefit obligation	0	0
Total projected benefit obligation - aggregate benefit obligation	650	675
Accumulated benefit obligation in excess of fair value of plan assets - aggregate benefit obligation	609	629
Fair value of plan assets in excess of accumulated benefit obligation - aggregate benefit obligation	0	0
Total accumulated benefit obligation - aggregate benefit obligation	609	629
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets	575	515
Fair value of plan assets in excess of benefit obligation - aggregate fair value of plan assets	0	0
Total projected benefit obligation - aggregate fair value of plan assets	575	515
Accumulated benefit obligation in excess of accumulated benefit obligation - aggregate fair value of plan assets	575	515
Fair value of plan assets in excess of accumulated benefit obligation - aggregate fair value of plan assets	0	0
Total accumulated benefit obligation - aggregate fair value of plan assets	575	515
Foreign Plan [Member]
Projected benefit obligation and fair value of plan assets [Abstract]
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation	363	378
Fair value of plan assets in excess of projected benefit obligation - aggregate benefit obligation	886	960
Total projected benefit obligation - aggregate benefit obligation	1,249	1,338
Accumulated benefit obligation in excess of fair value of plan assets - aggregate benefit obligation	351	364
Fair value of plan assets in excess of accumulated benefit obligation - aggregate benefit obligation	879	952
Total accumulated benefit obligation - aggregate benefit obligation	1,230	1,316
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets	249	269
Fair value of plan assets in excess of benefit obligation - aggregate fair value of plan assets	1,143	1,171
Total projected benefit obligation - aggregate fair value of plan assets	1,392	1,440
Accumulated benefit obligation in excess of accumulated benefit obligation - aggregate fair value of plan assets	249	269
Fair value of plan assets in excess of accumulated benefit obligation - aggregate fair value of plan assets	1,143	1,171
Total accumulated benefit obligation - aggregate fair value of plan assets	$ 1,392	$ 1,440

RETIREMENT PLANS AND POST RE_10

RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Expected Benefit Payments) (Details) $ in Millions	Oct. 31, 2018USD ($)
Domestic Plan [Member] | Pension Plan [Member]
Future benefit payments [Abstract]
2,019	$ 39
2,020	41
2,021	46
2,022	48
2,023	52
2024 - 2028	275
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member]
Future benefit payments [Abstract]
2,019	18
2,020	18
2,021	17
2,022	16
2,023	16
2024 - 2028	71
Foreign Plan [Member] | Pension Plan [Member]
Future benefit payments [Abstract]
2,019	32
2,020	36
2,021	39
2,022	41
2,023	44
2024 - 2028	$ 238

RETIREMENT PLANS AND POST RE_11

RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Assumptions) (Details)	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017
Foreign Plan [Member] | Pension Plan [Member]
Weighted average assumptions used in calculating net periodic benefit cost [Abstract]
Discount rate minimum - net periodic cost (in hundredths)	0.59%	0.40%
Discount rate maximum - net periodic costs (in hundredths)	2.52%	2.63%
Average increase in compensation levels - net periodic costs - minimum (in hundredths)	2.50%	2.50%
Average increase in compensation levels - net periodic costs - maximum (in hundredths)	3.25%	3.50%
Expected long-term return on assets - net periodic costs - minimum (in hundredths)	4.00%	4.00%
Expected long-term return on assets - net periodic costs - maximum (in hundredths)	6.50%	6.50%
Weighted average assumptions used in calculating benefit obligation [Abstract]
Discount rate minimum - benefit obligation (in hundredths)	0.83%	0.59%
Discount rate maximum - benefit obligation (in hundredths)	2.83%	2.52%
Average increase in compensation levels minimum - benefit obligation (in hundredths)	2.50%	2.50%
Average increase in compensation levels maximum - benefit obligation (in hundredths)	3.00%	3.25%
Domestic Plan [Member] | Pension Plan [Member]
Weighted average assumptions used in calculating net periodic benefit cost [Abstract]
Discount rate - net periodic rate (in hundredths)	3.75%	3.50%
Average increasee in compensation levels - net periodic costs (in hundredths)	3.00%	3.00%
Expected long-term return on assets - net periodic costs (in hundredths)	7.50%	7.50%
Weighted average assumptions used in calculating benefit obligation [Abstract]
Discount rate - benefit obligation (in hundredths)	4.50%	3.75%
Average increase in compensation levels - net periodic costs (in hundredths)	3.00%	3.00%
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member]
Weighted average assumptions used in calculating net periodic benefit cost [Abstract]
Discount rate - net periodic rate (in hundredths)	3.50%	3.50%
Expected long-term return on assets - net periodic costs (in hundredths)	7.50%	7.50%
Current medical cost trend rate (in hundredths)	6.00%	6.00%
Ultimate medical cost trend rate (in hundredths)	3.50%	3.50%
Medical cost trend rate decreases to ultimate rate in year	2,029	2,029
Weighted average assumptions used in calculating benefit obligation [Abstract]
Discount rate - benefit obligation (in hundredths)	4.25%	3.50%
Current medical cost trend rate - benefit obligation (in hundredths)	6.00%	6.00%
Ultimate medical cost trend rate - benefit obligation (in hundredths)	4.00%	3.50%
Medical cost trend rate decreases to ultimate rate in year - benefit obligation	2,029	2,029

RETIREMENT PLANS AND POST RE_12

RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS Japan Employee Pension Fund (Details)	Dec. 15, 2016USD ($)
Increase (Decrease) in Obligation, Pension Benefits	$ 142,000,000
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Assets Transferred to (from) Plan	51,000,000
Increase in funded status	91,000,000
Japanese Welfare Pension Insurance Law, Government Subsidy	68,000,000
Japanese Welfare Pension Insurance Law, Previously Accrued Salary Progression Derecognition	$ 4,000,000

GUARANTEES (Details)

GUARANTEES (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Guarantees [Abstract]
Standard Product Warranty Description	Effective December 1, 2017, Keysight warranties on products sold through direct sales channels are primarily for one year. Warranties for products sold through distribution channels continue to be primarily for three years.
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning balance	$ 45	$ 44
Accruals for warranties, including change in estimates	36	33
Settlements made during the period	(36)	(32)
Ending balance	45	45
Standard Product Warranty Accrual, Balance Sheet Classification [Abstract]
Accruals for warranties due within one year			$ 25	$ 24
Accruals for warranties due after one year			20	21
Ending balance at October 31	$ 45	$ 44	$ 45	$ 45

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Operating Lease, Future Minimum Lease Payments Schedule) (Details) $ in Millions	Oct. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
2,019	$ 44
2,020	38
2,021	27
2,022	22
2,023	14
Thereafter	$ 46

COMMITMENTS AND CONTINGENCIES_2

COMMITMENTS AND CONTINGENCIES (Operating Lease, Future Minimum Sublease Income) (Details) $ in Millions	Oct. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
2,019	$ 2
2,020	1
2,021	1
2,022	0
2,023	0
Thereafter	$ 0

COMMITMENTS AND CONTINGENCIES_3

COMMITMENTS AND CONTINGENCIES (Rent expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Rent Expense	$ 60	$ 51	$ 45

COMMITMENTS AND CONTINGENCIES_4

COMMITMENTS AND CONTINGENCIES (Capital Leases) (Details) - USD ($) $ in Millions	Oct. 31, 2018	Oct. 31, 2017
Leases [Abstract]
Capital Lease Obligations	$ 4	$ 4
Capital Leases, Future Minimum Payments Due in 2019	1
Capital Leases, Future Minimum Payments Due in 2020	0
Capital Leases, Future Minimum Payments Due in 2021	1
Capital Leases, Future Minimum Payments Due in 2022	0
Capital Leases, Future Minimum Payments Due in 2023	1
Capital Leases, Future Minimum Payments Due Thereafter	$ 2

COMMITMENTS AND CONTINGENCIES L

COMMITMENTS AND CONTINGENCIES Litigation and Contingencies (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Loss Contingencies [Line Items]
Litigation Settlement, Expense	$ 25	$ 0	$ 0

DEBT (Credit Facility) (Details

DEBT (Credit Facility) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Line of Credit Facility [Line Items]
Amortization of Debt Issuance Costs	$ 0	$ 9	$ 0
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Initiation Date	Feb. 15, 2017
Line of Credit Facility, Maximum Borrowing Capacity	$ 450
Line of Credit Facility, Expiration Date	Feb. 15, 2022
Additional amount of drawings	$ 150
Repayments of Short-term Debt	40
Line of Credit Facility, Fair Value of Amount Outstanding	$ 0
Line of Credit Facility, Covenant Compliance	We were in compliance with the covenants of the Revolving Credit Facility during the year ended October 31, 2018.
Unsecured Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Borrowing Capacity, Description	On February 15, 2017, we entered into an amended and restated credit agreement (the “Revolving Credit Facility”) that replaced our existing $450 million unsecured credit facility dated September 15, 2014. The Revolving Credit Facility provides for a $450 million, five-year unsecured revolving credit facility that will expire on February 15, 2022 and bears interest at an annual rate of LIBOR + 1.30%. In addition, the Revolving Credit Facility permits us to increase the total commitments under this credit facility by up to $150 million in the aggregate on one or more occasions upon request. We may use amounts borrowed under the facility for general corporate purposes.
London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Description of Variable Rate Basis	LIBOR + 1.30%

DEBT (Components and Additional

DEBT (Components and Additional Disclosures) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017
Debt Instrument [Line Items]
Letters of credit outstanding, amount	$ 26	$ 26
Long-term Debt, Current Maturities	$ 499	$ 10
4.55% Senior Notes 2024
Debt Instrument [Line Items]
Issuance date of debt	Oct. 31, 2014
Aggregate face amount of debt	$ 600
Percentage Of Face Amount Of Debt Instrument Issued	99.966%
Fixed interest rate per annum	4.55%
Debt Instrument, Frequency of Periodic Payment	Semi-annually
Debt Issuance Costs, Gross	$ 5
Maturity date	Oct. 30, 2024
4.60% Senior Notes due 2027
Debt Instrument [Line Items]
Issuance date of debt	Apr. 30, 2017
Aggregate face amount of debt	$ 700
Percentage Of Face Amount Of Debt Instrument Issued	99.873%
Fixed interest rate per annum	4.60%
Debt Instrument, Frequency of Periodic Payment	Semi-annually
Debt Issuance Costs, Gross	$ 6
Debt Instrument, Unamortized Discount	$ 1
Maturity date	Apr. 6, 2027
Term Loan [Member]
Debt Instrument [Line Items]
Issuance date of debt	Feb. 15, 2017
Aggregate face amount of debt	$ 400
Debt Issuance Costs, Gross	$ 1
Debt Instrument, Term	3 years
Long-term Debt, Current Maturities	$ 10
London Interbank Offered Rate (LIBOR) [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis	LIBOR + 1.50%
3.30% Senior Notes 2019
Debt Instrument [Line Items]
Issuance date of debt	Oct. 31, 2014
Aggregate face amount of debt	$ 500
Percentage Of Face Amount Of Debt Instrument Issued	99.902%
Fixed interest rate per annum	3.30%
Debt Instrument, Frequency of Periodic Payment	Semi-annually
Debt Issuance Costs, Gross	$ 4
Maturity date	Oct. 30, 2019

DEBT Long Term and Short Term D

DEBT Long Term and Short Term Debt (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017
Debt Instrument [Line Items]
Debt Obligations	$ 1,790	$ 2,048
Long-term Debt	1,291	2,038
Long-term Debt, Current Maturities	499	10
Long-term Debt, Excluding Current Maturities	1,291	2,038
Repayments of Senior Debt	260	140
3.30% Senior Notes 2019
Debt Instrument [Line Items]
Debt Obligations	499	498
4.55% Senior Notes 2024
Debt Instrument [Line Items]
Debt Obligations	597	596
4.60% Senior Notes due 2027
Debt Instrument [Line Items]
Debt Obligations	694	694
Term Loan [Member]
Debt Instrument [Line Items]
Debt Obligations	$ 0	$ 260

DEBT Long term and Short term_2

DEBT Long term and Short term debt- unamortized cost (Details) - USD ($) $ in Millions	Oct. 31, 2018	Oct. 31, 2017
3.30% Senior Notes 2019
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	$ 1	$ 2
4.55% Senior Notes 2024
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	3	4
4.60% Senior Notes due 2027
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	$ 6	$ 6

STOCKHOLDERS' EQUITY (Component

STOCKHOLDERS' EQUITY (Components of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions	Oct. 31, 2018	Oct. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized gain on equity securities, net of tax (expense) of $(2) and $(5)	$ 0	$ 14
Foreign currency translation, net of tax (expense) of $(63) and $(63)	(60)	(39)
Unrealized losses on defined benefit plans, net of tax benefit of $81 and $82	(426)	(433)
Unrealized losses on derivative instruments, net of tax benefit (expense) of $(1) and $(2)	(2)	1
Total accumulated other comprehensive loss	(488)	(457)
Accumulated other Comprehensive Income (Loss), Tax [Abstract]
Unrealized gain on equity securities, tax	(2)	5
Foreign currency translation, tax	(63)	63
Unrealized losses on defined benefit plans, tax	81	82
Unrealized gains (losses) on derivative instruments, tax	$ (1)	$ 2

STOCKHOLDERS' EQUITY (Changes i

STOCKHOLDERS' EQUITY (Changes in Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ 2,310	$ 1,513	$ 1,302
Other comprehensive income (loss)	(31)	161	(139)
Ending Balance	2,433	2,310	1,513
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(457)	(618)
Other comprehensive income (loss) before reclassifications	(61)	178
Amounts reclassified out of accumulated other comprehensive income	27	46
Tax (expense) benefit	3	(63)
Other comprehensive income (loss)	(31)	161
Ending Balance	(488)	(457)	(618)
Accumulated Net Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	14	10
Other comprehensive income (loss) before reclassifications	(17)	5
Amounts reclassified out of accumulated other comprehensive income	0	0
Tax (expense) benefit	3	(1)
Other comprehensive income (loss)	(14)	4
Ending Balance	0	14	10
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(39)	(29)
Other comprehensive income (loss) before reclassifications	(21)	(10)
Amounts reclassified out of accumulated other comprehensive income	0	0
Tax (expense) benefit	0	0
Other comprehensive income (loss)	(21)	(10)
Ending Balance	(60)	(39)	(29)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(468)	(646)
Other comprehensive income (loss) before reclassifications	(23)	177
Amounts reclassified out of accumulated other comprehensive income	53	69
Tax (expense) benefit	(7)	(68)
Other comprehensive income (loss)	23	178
Ending Balance	(445)	(468)	(646)
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	35	50
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified out of accumulated other comprehensive income	(22)	(24)
Tax (expense) benefit	6	9
Other comprehensive income (loss)	(16)	(15)
Ending Balance	19	35	50
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	1	(3)
Other comprehensive income (loss) before reclassifications	0	6
Amounts reclassified out of accumulated other comprehensive income	(4)	1
Tax (expense) benefit	1	(3)
Other comprehensive income (loss)	(3)	4
Ending Balance	$ (2)	$ 1	$ (3)

STOCKHOLDERS' EQUITY (Reclassif

STOCKHOLDERS' EQUITY (Reclassifications from Other Comprehensive Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Cost of Goods and Services Sold	$ 1,756	$ 1,487	$ 1,294
Income Tax Expense (Benefit)	576	(77)	(31)
Net income	165	102	335
Income (loss) before taxes	(411)	179	366
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Net income	(19)	(31)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Income Tax Expense (Benefit)	(1)	1
Net income	3	0
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Income (loss) before taxes	(53)	(69)
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Income (loss) before taxes	22	24
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Income Tax Expense (Benefit)	9	14
Net income	(22)	(31)
Income (loss) before taxes	(31)	(45)
Products
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Cost of Goods and Services Sold	1,440	1,206	$ 1,042
Products | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Cost of Goods and Services Sold	$ 4	$ (1)

STOCKHOLDERS' EQUITY (Issuance

STOCKHOLDERS' EQUITY (Issuance of Common Stock) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Statement of Stockholders' Equity [Abstract]
Proceeds from Issuance of Common Stock	$ 0	$ 444	$ 0

STOCKHOLDERS' EQUITY (Stock Rep

STOCKHOLDERS' EQUITY (Stock Repurchase Program) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016	Mar. 06, 2018
Equity [Abstract]
Stock Repurchase Program, Authorized Amount			$ 200	$ 350
Treasury Stock, Shares, Acquired	2,075,460	0
Treasury Stock, Value, Acquired, Cost Method	$ (120)		$ (62)

SEGMENT INFORMATION (General) (

SEGMENT INFORMATION (General) (Details)	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017segment
Segment Reporting [Abstract]
Number of Reportable Segments	4
Segment Reporting, Factors Used to Identify Entity's Reportable Segments	Our operating segments were determined based primarily on how the chief operating decision maker views and evaluates our operations. Segment operating results are regularly reviewed by the chief operating decision maker to make decisions about resources to be allocated to each segment and to assess performance. Other factors, including market separation and customer specific applications, go-to-market channels, products and services and manufacturing are considered in determining the formation of these operating segments.
Segment Reporting, Additional Information about Entity's Reportable Segments	The Communications Solutions Group serves customers spanning the worldwide commercial communications end market, which includes internet infrastructure, and the aerospace, defense and government end market. The group provides electronic design and test software, instruments, and systems used in the simulation, design, validation, manufacturing, installation and optimization of electronic equipment. The Electronic Industrial Solutions Group provides test and measurement solutions across a broad set of electronic industrial end markets, focusing on high-growth applications in the automotive and energy industry and measurement solutions for semiconductor design and manufacturing, consumer electronics, education and general electronics manufacturing. The group provides electronic design and test software, instruments, and systems used in the simulation, design, validation, manufacturing, installation and optimization of electronic equipment. The Ixia Solutions Group helps customers validate the performance and security resilience of their networks and associated applications. The test, visibility and security products help organizations and their customers strengthen their physical and virtual networks. Enterprises, service providers, network equipment manufacturers, and governments worldwide rely on the group's solutions to validate new products before shipping and secure ongoing operation of their networks with better visibility and security. The group’s product solutions consist of high-performance hardware platforms, software applications, and services, including warranty and maintenance offerings. The Services Solutions Group provides repair, calibration and consulting services, and remarkets used Keysight equipment. In addition to providing repair and calibration support for Keysight equipment, we also calibrate non-Keysight equipment. The group serves the same markets as Keysight’s Communications Solutions and Electronic Industrial Solutions Groups, providing industry-specific services to deliver complete Keysight solutions and help customers reduce their total cost of ownership for their design and test equipment.
Description of Effect on Previously Reported Segment Information for Change in Composition of Reportable Segments	On April 18, 2017, we completed the acquisition of Ixia, which became a separate reportable operating segment, the Ixia Solutions Group. As a result, Keysight has four segments: Communications Solutions Group, Electronic Industrial Solutions Group, Ixia Solutions Group and Services Solutions Group.

SEGMENT INFORMATION (Profitabil

SEGMENT INFORMATION (Profitability) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Segment Reporting Information [Line Items]
Total net revenue	$ 3,878	$ 3,189	$ 2,918
Income statement components (Loss) [Abstract]
Segment Operating Income (Loss)	(346)	239	406
Depreciation expense	103	92	85
Communications Solutions Group
Segment Reporting Information [Line Items]
Total net revenue	2,036	1,737	1,740
Income statement components (Loss) [Abstract]
Amortization of acquisition-related balances	1	1	12
Total segment revenue	2,037	1,738	1,752
Segment Operating Income (Loss)	454	311	314
Depreciation expense	51	52	53
Electronic Industrial Solutions Group
Segment Reporting Information [Line Items]
Total net revenue	965	836	776
Income statement components (Loss) [Abstract]
Amortization of acquisition-related balances	0	0	0
Total segment revenue	965	836	776
Segment Operating Income (Loss)	241	199	169
Depreciation expense	20	20	20
Ixia Solutions Group [Member]
Segment Reporting Information [Line Items]
Total net revenue	416	197	0
Income statement components (Loss) [Abstract]
Amortization of acquisition-related balances	35	59	0
Total segment revenue	451	256	0
Segment Operating Income (Loss)	21	42	0
Depreciation expense	16	7	0
Services Solutions Group
Segment Reporting Information [Line Items]
Total net revenue	461	419	402
Income statement components (Loss) [Abstract]
Amortization of acquisition-related balances	0	0	0
Total segment revenue	461	419	402
Segment Operating Income (Loss)	68	68	63
Depreciation expense	16	13	12
Total Segments [Member]
Segment Reporting Information [Line Items]
Total net revenue	3,878	3,189	2,918
Income statement components (Loss) [Abstract]
Amortization of acquisition-related balances	36	60	12
Total segment revenue	3,914	3,249	2,930
Segment Operating Income (Loss)	784	620	546
Depreciation expense	$ 103	$ 92	$ 85

SEGMENT INFORMATION (Reconcilia

SEGMENT INFORMATION (Reconciliation of Reportable Results) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Reconcilitation between statement results and enterprise results [Abstract]
Total reportable segments' income from operations	$ 784	$ 620	$ 546
Share-based compensation expense	(59)	(56)	(49)
Restructuring and related costs	(17)	(11)	0
Amortization of acquisition-related balances	(265)	(256)	(56)
Acquisition and integration costs	(49)	(57)	(18)
Acquisition-related compensation expense	0	(28)	0
Separation and related costs	(2)	(20)	(24)
Pension curtailment and settlement loss (gain)	(1)	69	0
Loss from Catastrophes	(7)	(16)	0
Goodwill impairment	(709)	0	0
Litigation Settlement, Expense	(25)	0	0
Gain (Loss) on Disposition of Business	20	0	0
Other	(16)	(6)	7
Operating Income (Loss)	(346)	239	406
Interest income	12	7	3
Interest expense	(83)	(80)	(47)
Other income (expense), net	6	13	4
Income (loss) before taxes	(411)	179	366
Segment assets and capital expenditures [Abstract]
Total reportable segments' assets	4,330	4,905
Capital expenditures	132	72	91
Communications Solutions Group
Reconcilitation between statement results and enterprise results [Abstract]
Goodwill impairment	0
Operating Income (Loss)	454	311	314
Segment assets and capital expenditures [Abstract]
Total reportable segments' assets	1,854	1,739
Capital expenditures	63	36
Electronic Industrial Solutions Group
Reconcilitation between statement results and enterprise results [Abstract]
Goodwill impairment	0
Operating Income (Loss)	241	199	169
Segment assets and capital expenditures [Abstract]
Total reportable segments' assets	811	799
Capital expenditures	27	15
Ixia Solutions Group [Member]
Reconcilitation between statement results and enterprise results [Abstract]
Goodwill impairment	709
Operating Income (Loss)	21	42	0
Segment assets and capital expenditures [Abstract]
Total reportable segments' assets	1,327	2,063
Capital expenditures	10	7
Services Solutions Group
Reconcilitation between statement results and enterprise results [Abstract]
Goodwill impairment	0
Operating Income (Loss)	68	68	63
Segment assets and capital expenditures [Abstract]
Total reportable segments' assets	338	304
Capital expenditures	32	14
Total Segments [Member]
Reconcilitation between statement results and enterprise results [Abstract]
Operating Income (Loss)	784	620	$ 546
Segment assets and capital expenditures [Abstract]
Total reportable segments' assets	4,330	4,905
Capital expenditures	$ 132	$ 72

SEGMENT INFORMATION (Segment As

SEGMENT INFORMATION (Segment Assets to Total Assets Recon) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Segment Reporting [Abstract]
Total reportable segments' assets	$ 4,330	$ 4,905
Capital expenditures	132	72	$ 91
Cash and cash equivalents	913	818
Prepaid expenses	106	113
Other current assets	9	7
Investments	46	63
Long-term and other receivables	118	118
Other	302	(91)
Total assets	$ 5,824	$ 5,933

SEGMENT INFORMATION (Entity-Wid

SEGMENT INFORMATION (Entity-Wide Disclosures on Geographic Areas) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	$ 3,878	$ 3,189	$ 2,918
Concentration Risk, Customer	No customer represented 10 percent or more of our total net revenue	No customer represented 10 percent or more of our total net revenue	No customer represented 10 percent or more of our total net revenue
Long-lived assets:	$ 870	$ 819
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	1,398	1,054	$ 1,009
Long-lived assets:	310	280
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	710	608	572
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	342	338	323
Long-lived assets:	222	234
Malaysia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets:	72	73
UNITED KINGDOM
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets:	145	106
Rest of the World [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	1,428	1,189	$ 1,014
Long-lived assets:	$ 121	$ 126

NORTHERN CALIFORNIA WILDFIRES_3

NORTHERN CALIFORNIA WILDFIRES IMPACT (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Unusual or Infrequent Item, or Both [Line Items]
Self Insurance Reserve	$ 10
Unusual or Infrequent Item, or Both, Insurance Proceeds	68
Loss from Catastrophes	7	$ 16	$ 0
Insurance Settlements Receivable	24
Estimated Insurance Recoveries	90	2
Capital expenditures	132	72	$ 91
Cost of Products and Services [Member]
Unusual or Infrequent Item, or Both [Line Items]
Loss from Catastrophes	5	5
Research and Development Expense [Member]
Unusual or Infrequent Item, or Both [Line Items]
Loss from Catastrophes	1	1
Selling, general and administrative [Member]
Unusual or Infrequent Item, or Both [Line Items]
Loss from Catastrophes	1	8
Other operating expense (income), net
Unusual or Infrequent Item, or Both [Line Items]
Loss from Catastrophes	0	$ 2
Natural Disasters and Other Casualty Events [Member]
Unusual or Infrequent Item, or Both [Line Items]
Capital expenditures	$ 27

NORTHERN CALIFORNIA WILDFIRES_4

NORTHERN CALIFORNIA WILDFIRES IMPACT (range of estimated losses) (Details) $ in Millions	Oct. 31, 2018USD ($)
Minimum [Member]
Loss due to catastrophe estimate	$ 125
Maximum [Member]
Loss due to catastrophe estimate	$ 135

SCHEDULE II - VALUATION AND Q_2

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member] - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 63	$ 38	$ 46
Additions Charged to Expenses or Other Accounts	18	31	4
Deductions Credited to Expenses or Other Accounts	(2)	(6)	(12)
Balance at End of Period	$ 79	$ 63	$ 38