Retirement and Post-Retirement Benefit Plans (Tables)

12 Months Ended

Oct. 31, 2015

Retirement and Post-Retirement Benefit Plans

Schedule of fair value of plan assets and projected benefit obligations for US defined benefit plans and DPSP

	For the fiscal years ended October 31
	2015				2014
	Plan Assets		Projected Benefit Obligation		Plan Assets		Projected Benefit Obligation
	In millions
U.S. defined benefit plans	$	11,077	$	12,716	$	11,979	$	13,756
DPSP		742		742		828		828
Total	$	11,819	$	13,458	$	12,807	$	14,584

Schedule of net pension and post-retirement benefit (credit) costs

	For the fiscal years ended October 31
	2015			2014			2013			2015			2014			2013			2015			2014			2013
	U.S. Defined Benefit Plans									Non-U.S. Defined Benefit Plans									Post-Retirement Benefit Plans
	In millions
Service cost	$	1		$	1		$	1		$	326		$	308		$	337		$	5		$	5		$	6
Interest cost		566			569			560			622			737			676			29			32			31
Expected return on plan assets		(818	)		(811	)		(845	)		(1,166	)		(1,140	)		(1,007	)		(39	)		(34	)		(34	)
Amortization and deferrals:
Actuarial loss (gain)		54			15			77			441			318			341			(11	)		(10	)		2
Prior service benefit		—			—			—			(21	)		(23	)		(27	)		(20	)		(41	)		(67	)
Net periodic benefit (credit) cost		(197	)		(226	)		(207	)		202			200			320			(36	)		(48	)		(62	)
Curtailment gain		—			—			—			—			(7	)		(3	)		—			—			(7	)
Settlement loss		114			1			12			4			12			18			—			—			—
Special termination benefits		—			—			—			25			50			31			1			32			(5	)
Net benefit (credit) cost	$	(83	)	$	(225	)	$	(195	)	$	231		$	255		$	366		$	(35	)	$	(16	)	$	(74	)

Schedule of weighted average assumptions used to calculate net benefit (credit) cost

	For the fiscal years ended October 31
	2015			2014			2013			2015			2014			2013			2015			2014			2013
	U.S. Defined Benefit Plans									Non-U.S. Defined Benefit Plans									Post-Retirement Benefit Plans
Discount rate		4.4	%		4.9	%		4.1	%		3.0	%		3.9	%		3.8	%		3.6	%		3.9	%		3.0	%
Expected increase in compensation levels		2.0	%		2.0	%		2.0	%		2.4	%		2.4	%		2.4	%		—			—			—
Expected long-term return on plan assets		7.2	%		7.7	%		7.8	%		6.9	%		7.0	%		7.2	%		9.0	%		8.9	%		9.0	%

Schedule of funded status of the defined benefit and post-retirement benefit plans

	As of October 31
	2015			2014			2015			2014			2015			2014
	U.S. Defined Benefit Plans						Non-U.S. Defined Benefit Plans						Post-Retirement Benefit Plans
	In millions
Change in fair value of plan assets:
Fair value—beginning of year	$	11,979		$	10,866		$	17,570		$	16,083		$	458		$	396
Acquisition/addition of plans		(1	)		—			5			8			—			—
Actual return on plan assets		506			1,648			1,059			1,814			45			83
Employer contributions		29			27			619			1,019			39			92
Participant contributions		—			—			55			64			57			54
Benefits paid		(322	)		(558	)		(570	)		(568	)		(125	)		(167	)
Settlement		(1,114	)		(4	)		(17	)		(49	)		—			—
Currency impact		—			—			(1,244	)		(801	)		—			—
Fair value—end of year		11,077			11,979			17,477			17,570			474			458
Change in benefit obligation:
Projected benefit obligation—beginning of year		13,756			11,866			21,220			19,152			840			867
Acquisition/addition of plans		(1	)		—			1			10			—			—
Service cost		1			1			326			308			5			5
Interest cost		566			569			622			737			29			32
Participant contributions		—			—			55			64			57			54
Actuarial (gain) loss		(170	)		1,882			457			2,500			(59	)		22
Benefits paid		(322	)		(558	)		(570	)		(568	)		(126	)		(167	)
Plan amendments		—			—			(89	)		—			—			—
Curtailment		—			—			—			(49	)		—			—
Settlement		(1,114	)		(4	)		(17	)		(49	)		—			—
Special termination benefits		—			—			25			50			1			32
Currency impact		—			—			(1,509	)		(935	)		(10	)		(5	)
Projected benefit obligation—end of year		12,716			13,756			20,521			21,220			737			840
Funded status at end of year	$	(1,639	)	$	(1,777	)	$	(3,044	)	$	(3,650	)	$	(263	)	$	(382	)
Accumulated benefit obligation	$	12,715		$	13,755		$	19,695		$	20,207

Schedule of weighted-average assumptions used to calculate the projected benefit obligations

	For the fiscal years ended October 31
	2015			2014			2015			2014			2015			2014
	U.S. Defined Benefit Plans						Non-U.S. Defined Benefit Plans						Post-Retirement Benefit Plans
Discount rate		4.4	%		4.4	%		3.0	%		3.2	%		3.8	%		3.6	%
Expected increase in compensation levels		2.0	%		2.0	%		2.5	%		2.5	%		—			—

Schedule of net amount recognized for the entity's defined benefit and post-retirement benefit plans in the entity's Consolidated Balance Sheets

	As of October 31
	2015			2014			2015			2014			2015			2014
	U.S. Defined Benefit Plans						Non-U.S. Defined Benefit Plans						Post-Retirement Benefit Plans
	In millions
Noncurrent assets	$	—		$	—		$	532		$	421		$	—		$	—
Current liabilities		(37	)		(35	)		(42	)		(43	)		(46	)		(47	)
Noncurrent liabilities		(1,602	)		(1,742	)		(3,534	)		(4,028	)		(217	)		(335	)
Funded status at end of year	$	(1,639	)	$	(1,777	)	$	(3,044	)	$	(3,650	)	$	(263	)	$	(382	)

Summary of pretax net actuarial loss (gain) and prior service benefit recognized in accumulated other comprehensive loss for defined benefit and post-retirement benefit plans

	As of October 31, 2015
	U.S. Defined Benefit Plans		Non-U.S. Defined Benefit Plans			Post-Retirement Benefit Plans
	In millions
Net actuarial loss (gain)	$	1,379	$	5,161		$	(173	)
Prior service benefit		—		(242	)		(99	)
Total recognized in Accumulated other comprehensive loss	$	1,379	$	4,919		$	(272	)

Summary of actuarial loss (gain) and prior service benefit that are expected to be amortized from accumulated other comprehensive loss (income) and recognized as components of net periodic benefit (credit) cost

	U.S. Defined Benefit Plans		Non-U.S. Defined Benefit Plans			Post-Retirement Benefit Plans
	In millions
Net actuarial loss (gain)	$	55	$	25		$	(12	)
Prior service benefit		—		(3	)		(17	)
Total expected to be recognized in net periodic benefit (credit) cost	$	55	$	22		$	(29	)

Schedule of defined benefit plans with projected benefit obligations exceeding the fair value of plan assets

	As of October 31
	2015		2014		2015		2014
	U.S. Defined Benefit Plans				Non-U.S. Defined Benefit Plans
	In millions
Aggregate fair value of plan assets	$	11,077	$	11,979	$	8,928	$	12,701
Aggregate projected benefit obligation	$	12,716	$	13,756	$	12,504	$	16,774

Schedule of defined benefit plans with accumulated benefit obligations exceeding the fair value of plan assets

	As of October 31
	2015		2014		2015		2014
	U.S. Defined Benefit Plans				Non-U.S. Defined Benefit Plans
	In millions
Aggregate fair value of plan assets	$	11,077	$	11,979	$	8,858	$	12,578
Aggregate accumulated benefit obligation	$	12,715	$	13,755	$	11,804	$	15,797

Schedule of fair value of plan assets by asset category within the fair value hierarchy

	As of October 31, 2015
	U.S. Defined Benefit Plans										Non-U.S. Defined Benefit Plans								Post-Retirement Benefit Plans
	Level 1			Level 2		Level 3		Total			Level 1		Level 2		Level 3		Total		Level 1			Level 2		Level 3		Total
	In millions
Asset Category:
Equity securities
U.S.	$	1,833		$	47	$	—	$	1,880		$	2,851	$	76	$	—	$	2,927	$	—		$	1	$	—	$	1
Non-U.S.		1,322			13		—		1,335			4,085		494		83		4,662		—			—		—		—
Debt securities
Corporate		—			3,238		31		3,269			—		3,352		—		3,352		—			28		—		28
Government(1)		—			1,756		—		1,756			—		1,534		—		1,534		—			39		—		39
Alternative Investments
Private Equity(2)		—			—		1,170		1,170			—		1		70		71		—			—		253		253
Hybrids(3)		—			—		—		—			—		2,670		30		2,700		—			—		—		—
Hedge Funds(4)		—			388		260		648			28		125		250		403		—			—		—		—
Real Estate Funds		—			—		—		—			464		49		571		1,084		—			—		—		—
Insurance Group Annuity Contracts		—			—		—		—			—		46		73		119		—			—		—		—
Common Collective Trusts and 103-12 Investment Entities(5)		—			756		—		756			—		7		—		7		—			59		—		59
Registered Investment Companies(6)		38			176		—		214			—		1		—		1		92			3		—		95
Cash and Cash Equivalents(7)		38			203		—		241			493		—		—		493		4			3		—		7
Other(8)		(224	)		32		—		(192	)		68		14		42		124		(8	)		—		—		(8	)
Total	$	3,007		$	6,609	$	1,461	$	11,077		$	7,989	$	8,369	$	1,119	$	17,477	$	88		$	133	$	253	$	474

(1)	Includes debt issued by national, state and local governments and agencies.
(2)	Includes limited partnerships such as equity, buyout, venture capital, real estate and other similar funds that invest in the U.S. and internationally where foreign currencies are hedged.
(3)	Includes a fund that invests in both private and public equities primarily in the U.S. and the United Kingdom, as well as emerging markets across all sectors. The fund also holds fixed income and derivative instruments to hedge interest rate and inflation risk. In addition, the fund includes units in transferable securities, collective investment schemes, money market funds, cash and deposits.
(4)	Includes limited partnerships that invest both long and short primarily in common stocks and credit, relative value, event driven equity, distressed debt and macro strategies. Management of the hedge funds has the ability to shift investments from value to growth strategies, from small to large capitalization stocks and bonds, and from a net long position to a net short position.
(5)	Department of Labor 103-12 IE (Investment Entity) designation is for plan assets held by two or more unrelated employee benefit plans which includes limited partnerships and venture capital partnerships.
(6)	Includes publicly and privately traded Registered Investment Entities.
(7)	Includes cash and cash equivalents such as short-term marketable securities.
(8)	Includes primarily unsettled transactions, international insured contracts and derivative instruments. Such unsettled transactions relate primarily to fixed income securities to be settled in the first quarter of fiscal 2016.

	As of October 31, 2014
	U.S. Defined Benefit Plans									Non-U.S. Defined Benefit Plans								Post-Retirement Benefit Plans
	Level 1			Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total		Level 1			Level 2		Level 3		Total
	In millions
Asset Category:
Equity securities
U.S.	$	1,787		$	—	$	—	$	1,787	$	2,935	$	30	$	—	$	2,965	$	—		$	—	$	—	$	—
Non-U.S.		1,268			—		—		1,268		4,050		742		80		4,872		—			—		—		—
Debt securities
Corporate		—			3,283		7		3,290		—		2,935		—		2,935		—			20		—		20
Government(1)		—			2,204		—		2,204		—		1,787		—		1,787		—			22		—		22
Alternative Investments
Private Equity(2)		—			—		1,284		1,284		—		2		51		53		—			—		271		271
Hybrids(3)		—			—		3		3		114		2,466		43		2,623		—			—		1		1
Hedge Funds(4)		—			346		263		609		—		103		285		388		—			—		—		—
Real Estate Funds		—			—		—		—		220		277		543		1,040		—			—		—		—
Insurance Group Annuity Contracts		—			—		—		—		—		44		79		123		—			—		—		—
Common Collective Trusts and 103-12 Investment Entities(5)		—			854		—		854		—		—		—		—		—			55		—		55
Registered Investment Companies(6)		68			314		—		382		—		—		—		—		86			1		—		87
Cash and Cash Equivalents(7)		161			66		—		227		573		—		—		573		—			6		—		6
Other(8)		(24	)		95		—		71		79		130		2		211		(4	)		—		—		(4	)
Total	$	3,260		$	7,162	$	1,557	$	11,979	$	7,971	$	8,516	$	1,083	$	17,570	$	82		$	104	$	272	$	458

(1)	Includes debt issued by national, state and local governments and agencies.
(2)	Includes limited partnerships such as equity, buyout, venture capital, real estate and other similar funds that invest in the U.S. and internationally where foreign currencies are hedged.
(3)	Includes a fund that invests in both private and public equities primarily in the U.S. and the United Kingdom, as well as emerging markets across all sectors. The fund also holds fixed income and derivative instruments to hedge interest rate and inflation risk. In addition, the fund includes units in transferable securities, collective investment schemes, money market funds, cash and deposits.
(4)	Includes limited partnerships that invest both long and short primarily in common stocks and credit, relative value, event driven equity, distressed debt and macro strategies. Management of the hedge funds has the ability to shift investments from value to growth strategies, from small to large capitalization stocks and bonds, and from a net long position to a net short position.
(5)	Department of Labor 103-12 IE (Investment Entity) designation is for plan assets held by two or more unrelated employee benefit plans which includes limited partnerships and venture capital partnerships.
(6)	Includes publicly and privately traded Registered Investment Entities.
(7)	Includes cash and cash equivalents such as short-term marketable securities.
(8)	Includes international insured contracts, derivative instruments and unsettled transactions.

Schedule of changes in fair value measurements of Level 3 investments

	For the fiscal year ended October 31, 2015
	U.S. Defined Benefit Plans														Non-U.S. Defined Benefit Plans																						Post-Retirement Benefit Plans
	Debt Securities		Alternative Investments												Equity			Alternative Investments																			Alternative Investments
	Corporate Debt		Private Equity			Hybrids			Hedge Funds			Total			Non U.S. Equities			Private Equity			Hybrids			Hedge Funds			Real Estate		Insurance Group Annuities			Other		Total			Private Equity			Hybrids			Total
	In millions
Beginning balance at October 31, 2014	$	7	$	1,284		$	3		$	263		$	1,557		$	80		$	51		$	43		$	285		$	543	$	79		$	2	$	1,083		$	271		$	1		$	272
Actual return on plan assets:
Relating to assets still held at the reporting date		—		(25	)		—			(3	)		(28	)		(18	)		(1	)		—			—			13		(6	)		3		(9	)		(2	)		—			(2	)
Relating to assets sold during the period		—		145			(1	)		—			144			—			7			(22	)		—			—		—			—		(15	)		46			—			46
Purchases, sales, and settlements (net)		24		(234	)		(2	)		—			(212	)		—			13			—			48			14		(2	)		—		73			(62	)		(1	)		(63	)
Transfers in and/or out of Level 3		—		—			—			—			—			21			—			9			(83	)		1		2			37		(13	)		—			—			—
Ending balance at October 31, 2015	$	31	$	1,170		$	—		$	260		$	1,461		$	83		$	70		$	30		$	250		$	571	$	73		$	42	$	1,119		$	253		$	—		$	253

	For the fiscal year ended October 31, 2014
	U.S. Defined Benefit Plans												Non-U.S. Defined Benefit Plans																			Post-Retirement Benefit Plans
	Debt Securities		Alternative Investments										Equity		Alternative Investments																	Alternative Investments
	Corporate Debt		Private Equity			Hybrids		Hedge Funds		Total			Non U.S. Equities		Private Equity			Hybrids		Hedge Funds			Real Estate		Insurance Group Annuities			Other		Total		Private Equity			Hybrids		Total
	In millions
Beginning balance at October 31, 2013	$	—	$	1,250		$	2	$	113	$	1,365		$	77	$	48		$	—	$	204		$	325	$	81		$	2	$	737	$	234		$	1	$	235
Actual return on plan assets:
Relating to assets still held at the reporting date		—		92			1		10		103			3		2			—		14			46		(8	)		—		57		51			—		51
Relating to assets sold during the period		—		169			—		—		169			—		2			—		(1	)		—		—			—		1		21			—		21
Purchases, sales, and settlements (net)		7		(227	)		—		140		(80	)		—		(1	)		43		68			108		(2	)		—		216		(35	)		—		(35	)
Transfers in and/or out of Level 3		—		—			—		—		—			—		—			—		—			64		8			—		72		—			—		—
Ending balance at October 31, 2014	$	7	$	1,284		$	3	$	263	$	1,557		$	80	$	51		$	43	$	285		$	543	$	79		$	2	$	1,083	$	271		$	1	$	272

Schedule of weighted-average target and actual asset allocations across the benefit plans

	U.S. Defined Benefit Plans									Non-U.S. Defined Benefit Plans									Post-Retirement Benefit Plans
				Plan Assets									Plan Assets									Plan Assets
	2015 Target Allocation									2015 Target Allocation									2015 Target Allocation
Asset Category				2015			2014						2015			2014						2015			2014
Public equity securities					34.2	%		31.3	%					45.7	%		46.8	%					10.7	%		10.2	%
Private/other equity securities					16.4	%		15.8	%					15.9	%		15.2	%					53.4	%		58.6	%
Real estate and other					(1.7	)%		0.6	%					6.9	%		7.1	%					(1.8	)%		—
Equity-related investments		53.5	%		48.9	%		47.7	%		66.4	%		68.5	%		69.1	%		66.1	%		62.3	%		68.8	%
Debt securities		46.1	%		47.5	%		49.2	%		33.4	%		28.7	%		27.6	%		32.0	%		33.2	%		27.5	%
Cash		0.4	%		3.6	%		3.1	%		0.2	%		2.8	%		3.3	%		1.9	%		4.5	%		3.7	%
Total		100.0	%		100.0	%		100.0	%		100.0	%		100.0	%		100.0	%		100.0	%		100.0	%		100.0	%

Schedule of estimated future benefits payable for the retirement and post-retirement plans

Fiscal year	U.S. Defined Benefit Plans		Non-U.S. Defined Benefit Plans		Post-Retirement Benefit Plans
	In millions
2016	$	879	$	22	$	82
2017		636		24		71
2018		645		26		58
2019		670		28		54
2020		705		29		51
Next five fiscal years to October 31, 2025		3,785		188		197