The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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- Definition

The amount of the cost recognized during the period for defined contribution plans.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

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Percentage employer matches of the employee's percentage contribution matched.

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Retirement and Post-Retirement Benefit Plans (Details 2) - USD ($) $ in Millions		12 Months Ended
	Jan. 01, 2017	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Defined Contribution Plan Disclosure [Line Items]
Total defined contribution expense		$ 438	$ 450	$ 480
Net benefit cost		$ 140	$ 341	142
HP 401(k) Plan
Defined Contribution Plan Disclosure [Line Items]
Percent of equal 401(k) match to employees effective during the period			100.00%
Percentage of maximum matching contribution			4.00%
Scenario, Forecast \| HP 401(k) Plan
Defined Contribution Plan Disclosure [Line Items]
Percent of equal 401(k) match to employees effective during the period	50.00%
Percentage of maximum matching contribution	6.00%
Former Parent Company
Defined Contribution Plan Disclosure [Line Items]
Net benefit cost			$ 201	$ 6