Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
Apr. 30, 2019	Apr. 30, 2018
Cash flows from operating activities
Net income (loss)	$ (26)	$ (5)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	66	73
Depreciation of equipment leased to others	31	36
Deferred taxes, including change in valuation allowance	(41)	1
Asset impairment charges	3	3
Gain (Loss) on Sales of Investments and Businesses, Net	59	0
Amortization of debt issuance costs and discount	12	15
Stock-based compensation	14	21
Provision for doubtful accounts	6	3
Equity in income of non-consolidated affiliates, net of dividends	(2)	3
Write off of debt issuance cost and discount	0	43
Other non-cash operating activities	(4)	(13)
Changes in other assets and liabilities, exclusive of businesses disposed	(190)	(278)
Net cash used in operating activities	(190)	(98)
Cash flows from investing activities
Payments to Acquire Marketable Securities	0	(148)
Sales of marketable securities	0	460
Maturities of marketable securities	79	18
Capital expenditures	(66)	(53)
Purchases of equipment leased to others	(76)	(92)
Proceeds from sales of property and equipment	5	5
Payments for (Proceeds from) Businesses and Interest in Affiliates	95	(3)
Payments for (Proceeds from) Other Investing Activities	0	1
Net Cash Provided by (Used in) Investing Activities	37	188
Cash flows from financing activities
Proceeds from issuance of secured debt	0	27
Principal payments on secured debt	(34)	(34)
Net change in secured revolving credit facilities	275	5
Proceeds from issuance of non-securitized debt	73	2,805
Principal payments on non-securitized debt	(508)	(2,589)
Net change in notes and debt outstanding under revolving credit facilities	126	74
Debt issuance costs	(2)	(33)
Proceeds from finance lease obligations	9	38
Proceeds from exercise of stock options	2	5
Dividends paid by subsidiaries to non-controlling interest	(13)	(14)
Other financing activities	(2)	(15)
Net cash provided by (used in) financing activities	(74)	269
Effect of exchange rate changes on cash and cash equivalents	(10)	(7)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(237)	352
Cash and cash equivalents at beginning of the period	1,445	840
Cash and cash equivalents at end of the period	$ 1,208	$ 1,192

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash outflow for the payment of debt classified as other, maturing after one year or the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585

+ Details

Name:	us-gaap_RepaymentsOfOtherLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585

+ Details

Name:	us-gaap_RepaymentsOfSecuredDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

+ References

+ Details

Name:	us-gaap_WriteOffOfDeferredDebtIssuanceCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration