Postretirement Benefits - Narrative (Details) employees in Thousands, $ in Millions	12 Months Ended
	Oct. 31, 2020 USD ($) employees	Oct. 31, 2019 USD ($)	Oct. 31, 2018 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	$ 2	$ 11	$ 2
Defined Contribution Plan, Administrative Expense	7	142	9
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	74	263	105
Defined Benefit Plan, Pension Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation	3,234	3,325
Defined Benefit Plan, Accumulated Benefit Obligation	3,200	3,300
Restructuring Charges	2	12	(1)
Defined Contribution Plan, Cost	33	35	33
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation	3,217	3,307
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Plan Assets	1,849	1,991
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	$ 16	17
Number Of Former Employees And Their Beneficiaries Included In Retiree Population | employees	25
Defined benefit plan, weighted average rate of increase in in per capita cost percent of benefit obligation	10.10%
Income (Loss) from Continuing Operations before Income Taxes, Domestic	$ 75	5
Profit sharing accrual		21
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Contribution by Employer, Net	35	136
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(64)	(405)
Defined Benefit Plan, Expected Future Benefit Payment, Year One	249
Fair Value of Plan Assets	$ 1,861	$ 2,013	$ 2,162
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	7.20%	7.40%	7.20%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.60%	3.10%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.30%	4.60%	3.90%
Defined Benefit Plan, Assumptions Used in Calculating Interest Cost, Discount Rate	2.60%	4.00%	3.00%
Defined Benefit Plan, Expected Amortization of Prior Service Cost (Credit), Next Fiscal Year	$ 1
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	63	$ 232	$ 72
Employer contributions	35	140
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	249	$ 266
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year	$ 107
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	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	$ 1,860	$ 2,011
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	243
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	236
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	229
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	222
Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years	995
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Contribution by Employer, Net	1	1
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	457	138
Defined Benefit Plan, Expected Future Benefit Payment, Year One	31
Fair Value of Plan Assets	252	$ 283	$ 297
Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components	$ 5
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	7.30%	7.50%	7.50%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.50%	3.10%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.30%	4.60%	3.90%
Defined Benefit Plan, Assumptions Used in Calculating Interest Cost, Discount Rate	2.70%	4.10%	3.10%
Defined Benefit Plan, Expected Amortization of Prior Service Cost (Credit), Next Fiscal Year	$ 0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	11	$ 31	$ 33
Employer contributions	1
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	1
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	136	144
Defined benefit plan, benefits paid from Company assets	23	$ 37
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year	$ (40)
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	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	80.00%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	5.00%
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year	3.10%
Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components	$ (4)
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation	77
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation	(57)
Defined Benefit Plan, Fair Value of Plan Assets Excluding Receivables	252	$ 283
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	40
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	46
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	46
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	45
Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years	199
Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets Excluding Receivables	54	851
Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets Excluding Receivables	11	132
Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets Excluding Receivables	1,476	860
Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets Excluding Receivables	176	77
Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Alternative Investments, Fair Value of Plan Assets, NAV	330	300
Defined Benefit Plan, Fair Value of Plan Assets Excluding Receivables	0	0
Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Alternative Investments, Fair Value of Plan Assets, NAV	65	74
Defined Benefit Plan, Fair Value of Plan Assets Excluding Receivables	0	0
Cash and Cash Equivalents [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	54	68
Cash and Cash Equivalents [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	11	8
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	54	68
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	11	8
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
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	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
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
US Treasury Bond Securities [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	46	58
US Treasury Bond Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
US Treasury Bond Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	46	58
US Treasury Bond Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
U.S. Equity [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	286	281
U.S. Equity [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	51	58
U.S. Equity [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	281
U.S. Equity [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	58
U.S. Equity [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	286	0
U.S. Equity [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	51	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
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
U.S. Equity [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
International Equity Other [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	240	283
International Equity Other [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	51	57
International Equity Other [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	283
International Equity Other [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	57
International Equity Other [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	240	0
International Equity Other [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	51	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
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
International Equity Other [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
Fixed Income, Multi Asset Credit [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	28	28
Fixed Income, Multi Asset Credit [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	9
Fixed Income, Multi Asset Credit [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	28	19
Fixed Income, Multi Asset Credit [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
Global Equity [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	211	219
Global Equity [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	219
Global Equity [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	211	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
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
Fixed Income, Long Duration Credit [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	320	296
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
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	320	296
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
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
Government [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	140	173
Government [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Government [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	140	173
Government [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
Fixed Income, High Yield [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	89	154
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
Fixed Income, High Yield [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	89	154
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
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
Fixed Income, Canadian Bond [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	11	20
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
Fixed Income, Canadian Bond [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	11	20
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
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
Global Real Estate [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	157	138
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
Global Real Estate [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	157	138
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
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
Commodities Investment [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	24	34
Commodities Investment [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	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	0
Commodities Investment [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Alternative Investments, Fair Value of Plan Assets, NAV	24	34
Insurance Linked Securities [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	4	6
Insurance Linked Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Insurance Linked Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Insurance Linked Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Alternative Investments, Fair Value of Plan Assets, NAV	4	6
Hedge Funds [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	181	187
Hedge Funds [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	37	37
Hedge Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Hedge Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	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
Hedge Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	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
Alternative Investments, Fair Value of Plan Assets, NAV	181	187
Hedge Funds [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Alternative Investments, Fair Value of Plan Assets, NAV	37	37
Private Equity Funds [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	17	23
Private Equity Funds [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	4	5
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
Private Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	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
Private Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	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
Alternative Investments, Fair Value of Plan Assets, NAV	17	23
Private Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Alternative Investments, Fair Value of Plan Assets, NAV	4	5
Real Estate [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	19	9
Real Estate [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	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
Real Estate [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Alternative Investments, Fair Value of Plan Assets, NAV	19	9
Common Stock | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	20	26
Common Stock | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Common Stock | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Common Stock | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Alternative Investments, Fair Value of Plan Assets, NAV	$ 20	$ 26
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]
Defined Benefit Plan Disclosure [Line Items]
Restructuring Charges	$ 7
Forecast [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 320
Accounting Standards Update 2017-07 [Member]
Defined Benefit Plan Disclosure [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption (Deprecated 2020-01-31)			$ 94