Postretirement Benefits - Narrative (Details) employees in Thousands, $ in Millions	3 Months Ended						12 Months Ended
	Oct. 31, 2016 USD ($)	Jul. 31, 2016 USD ($)	Apr. 30, 2016 USD ($)	Oct. 31, 2015 USD ($)	Oct. 31, 2014 USD ($)	Jul. 31, 2014 USD ($)	Oct. 31, 2016 USD ($) employees	Oct. 31, 2015 USD ($)	Oct. 31, 2014 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost							$ 153	$ 150	$ 160
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Projected Benefit Obligation	$ 3,946			$ 3,631			3,946	3,631
Defined Benefit Plan, Accumulated Benefit Obligation	4,000						4,000
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year							110
Restructuring Charges							10	76	42
Defined Contribution Plan, Cost Recognized							29	29	27
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Accumulated Benefit Obligation	3,934			3,612			3,934	3,612
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Fair Value of Plan Assets	2,224			2,061			2,224	2,061
Defined Benefit Plan, Benefits Paid							$ 15
Number Of Former Employees And Their Beneficiaries Included In Retiree Population | employees							33
Defined benefit plan, weighted average rate of increase in in per capita cost percent of benefit obligation							8.20%
Other Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefits Paid								15
United States Postretirement Benefit Plan of US Entity [Member]
Defined Benefit Plan Disclosure [Line Items]
Deferred Income Taxes and Other Assets, Noncurrent	548						$ 548
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	306						306
Fair Value of Plan Assets	$ 2,310			$ 2,422	$ 2,627		$ 2,310	$ 2,422	$ 2,627
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets							7.50%	7.80%	7.80%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.50%			4.00%			3.50%	4.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate							4.50%	3.70%	4.10%
Defined Benefit Plan, Assumptions Used in Calculating Interest Cost, Discount Rate							3.10%	3.70%	4.10%
Defined Benefit Plan, Future Amortization of Prior Service Cost (Credit)							$ 0
Defined Benefit Plan, Net Periodic Benefit Cost							82	$ 69	$ 106
Employer contributions							100	113
Effect of change in estimate approach on interest cost							36
Defined Benefit Plan, Benefits Paid							300	$ 309
Defined Benefit Plan, Future Amortization of Gain (Loss)							$ 117
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	3.50%			3.50%			3.50%	3.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase							3.50%	3.50%	3.50%
Defined Benefit Plan, Fair Value of Plan Assets Excluding Receivables	$ 2,297			$ 2,404			$ 2,297	$ 2,404
Defined Benefit Plan, Expected Future Benefit Payments, Year Two	293						293
Defined Benefit Plan, Expected Future Benefit Payments, Year Three	287						287
Defined Benefit Plan, Expected Future Benefit Payments, Year Four	281						281
Defined Benefit Plan, Expected Future Benefit Payments, Year Five	273						273
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter	1,252						1,252
Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	100						100
Fair Value of Plan Assets	$ 333			$ 369	415		333	$ 369	$ 415
Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components							$ 12
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets							7.50%	7.80%	7.80%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.50%			4.10%			3.50%	4.10%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate							4.60%	3.70%	4.10%
Defined Benefit Plan, Assumptions Used in Calculating Interest Cost, Discount Rate							3.30%	3.70%	4.10%
Defined Benefit Plan, Future Amortization of Prior Service Cost (Credit)							$ 0
Defined Benefit Plan, Net Periodic Benefit Cost							71	$ 81	$ 54
Employer contributions							2	2
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year							2
Effect of change in estimate approach on interest cost							17
Defined Benefit Plan, Benefits Paid							179	183
Defined benefit plan, benefits paid from Company assets							66	$ 61
Defined Benefit Plan, Future Amortization of Gain (Loss)							$ 23
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	0.00%			0.00%			0.00%	0.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase							0.00%	0.00%	0.00%
Defined benefit plan, weighted average rate of increase in in per capita cost percent of benefit obligation							88.00%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate							5.00%
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year							9.00%
Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components							$ (10)
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation							205
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation							(159)
Defined Benefit Plan, Fair Value of Plan Assets Excluding Receivables	$ 333			$ 368			333	$ 368
Defined Benefit Plan, Expected Future Benefit Payments, Year Two	105						105
Defined Benefit Plan, Expected Future Benefit Payments, Year Three	111						111
Defined Benefit Plan, Expected Future Benefit Payments, Year Four	111						111
Defined Benefit Plan, Expected Future Benefit Payments, Year Five	112						112
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter	532						532
Chatham [Member] | Facility Closing [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Postemployment Benefits, Period Expense		$ 5	$ 2			$ 14
Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets Excluding Receivables	917			946			917	946
Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets Excluding Receivables	156			163			156	163
Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets Excluding Receivables	1,078			1,269			1,078	1,269
Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets Excluding Receivables	121			163			121	163
Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Alternative Investments, Fair Value of Plan Assets, NAV	301			188			301	188
Defined Benefit Plan, Fair Value of Plan Assets Excluding Receivables	1			1			1	1
Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Alternative Investments, Fair Value of Plan Assets, NAV	56			42			56	42
Defined Benefit Plan, Fair Value of Plan Assets Excluding Receivables	0			0			0	0
Cash and Cash Equivalents [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	76			126			76	126
Cash and Cash Equivalents [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	19			29			19	29
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	76			126			76	126
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	19			29			19	29
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
US Large Cap [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			209			0	209
US Large Cap [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			25			0	25
US Large Cap [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			209			0	209
US Large Cap [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			25			0	25
US Large Cap [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
US Large Cap [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
US Large Cap [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
US Large Cap [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
US Smid Cap [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			253			0	253
US Smid Cap [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			42			0	42
US Smid Cap [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			253			0	253
US Smid Cap [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			42			0	42
US Smid Cap [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
US Smid Cap [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
US Smid Cap [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
US Smid Cap [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Canadian Equity [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			30			0	30
Canadian Equity [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			30			0	30
Canadian Equity [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Canadian Equity [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
International Equity [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			216			0	216
International Equity [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			53			0	53
International Equity [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			216			0	216
International Equity [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			53			0	53
International Equity [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
International Equity [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
International Equity [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
International Equity [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Emerging Markets Equity [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			77			0	77
Emerging Markets Equity [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			14			0	14
Emerging Markets Equity [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			77			0	77
Emerging Markets Equity [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			14			0	14
Emerging Markets Equity [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Emerging Markets Equity [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Emerging Markets Equity [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Emerging Markets Equity [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Equity [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Equity [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Equity [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Equity [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Corporate Bond Securities [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			792			0	792
Corporate Bond Securities [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	80			100			80	100
Corporate Bond Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Corporate Bond Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Corporate Bond Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			792			0	792
Corporate Bond Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	80			100			80	100
Corporate Bond Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Corporate Bond Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Asset-backed Securities [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			7			0	7
Asset-backed Securities [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			3			0	3
Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			7			0	7
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			3			0	3
Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Common And Preferred Stock [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			449			0	449
Common And Preferred Stock [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Common And Preferred Stock [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			449			0	449
Common And Preferred Stock [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
U.S. Equity [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	294			0			294	0
U.S. Equity [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	66			0			66	0
U.S. Equity [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	294			0			294	0
U.S. Equity [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	66			0			66	0
U.S. Equity [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
U.S. Equity [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
U.S. Equity [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
U.S. Equity [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Canadian Equity Other [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	29			0			29	0
Canadian Equity Other [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	29			0			29	0
Canadian Equity Other [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Canadian Equity Other [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
International Equity Other [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	291			0			291	0
International Equity Other [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	71			0			71	0
International Equity Other [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	291			0			291	0
International Equity Other [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	71			0			71	0
International Equity Other [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
International Equity Other [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
International Equity Other [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
International Equity Other [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Fixed Income, Multi Asset Credit [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	41			0			41	0
Fixed Income, Multi Asset Credit [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Fixed Income, Multi Asset Credit [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	41			0			41	0
Fixed Income, Multi Asset Credit [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Global Equity [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	227			0			227	0
Global Equity [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	227			0			227	0
Global Equity [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Global Equity [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Fixed Income, Long Duration Credit [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	530			0			530	0
Fixed Income, Long Duration Credit [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Fixed Income, Long Duration Credit [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	530			0			530	0
Fixed Income, Long Duration Credit [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Fixed Income, High Yield [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	204			0			204	0
Fixed Income, High Yield [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Fixed Income, High Yield [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	204			0			204	0
Fixed Income, High Yield [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Fixed Income, Canadian Bond [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	203			0			203	0
Fixed Income, Canadian Bond [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Fixed Income, Canadian Bond [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	203			0			203	0
Fixed Income, Canadian Bond [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Global Real Estate [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	141			0			141	0
Global Real Estate [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Global Real Estate [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	141			0			141	0
Global Real Estate [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Global Infrastructure [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	14			0			14	0
Global Infrastructure [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Global Infrastructure [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Global Infrastructure [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	14			0			14	0
Commodities Investment [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			21			0	21
Commodities Investment [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			1			0	1
Commodities Investment [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Commodities Investment [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Commodities Investment [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			21			0	21
Commodities Investment [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			1			0	1
Commodities Investment [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Commodities Investment [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Hedge Funds [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	230			109			230	109
Hedge Funds [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	42			22			42	22
Hedge Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Hedge Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Hedge Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Hedge Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Hedge Funds [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	230			109			230	109
Hedge Funds [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	42			22			42	22
Private Equity Funds [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	57			79			57	79
Private Equity Funds [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	14			20			14	20
Private Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Private Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Private Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Private Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Private Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	57			79			57	79
Private Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	14			20			14	20
Exchange Traded Funds [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			6			0	6
Exchange Traded Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			6			0	6
Exchange Traded Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Exchange Traded Funds [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Mutual Funds [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			29			0	29
Mutual Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			29			0	29
Mutual Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Mutual Funds [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Real Estate [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1			1			1	1
Real Estate [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Real Estate [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Real Estate [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	1			1			1	1
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			0	0
Common Stock [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			59			0	59
Common Stock [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Common Stock [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			59			0	59
Common Stock [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0			0			0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0			0			$ 0	0
Return-seeking Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Allocation Percentage							70.00%
Liability-hedging Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Allocation Percentage							30.00%
North America Truck [Member] | Indianapolis and Waukesha Foundry [Member]
Defined Benefit Plan Disclosure [Line Items]
Restructuring Charges					13		$ 2	$ 28
North America Truck [Member] | Indianapolis and Waukesha Foundry [Member] | Pension And Other Postretirement Contractual Termination Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Restructuring Charges					$ 11
Accounting Standards Update 2015-07 [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Transfers Between Measurement Levels	(301)			(188)
Accounting Standards Update 2015-07 [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Transfers Between Measurement Levels	$ (56)			$ 42