Postretirement Benefits - Narrative (Details) employees in Thousands, $ in Millions	12 Months Ended
	Oct. 31, 2017 USD ($) employees	Oct. 31, 2016 USD ($)	Oct. 31, 2015 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 118	$ 153	$ 150
Defined Benefit Plan, Pension Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation	3,487	3,946
Defined Benefit Plan, Accumulated Benefit Obligation	4,000	4,000
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	134
Restructuring Charges	3	10	76
Defined Contribution Plan, Cost	29		29
Defined Benefit Plan, Pension Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation	3,471	3,934
Defined Benefit Plan, Pension Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Fair Value of Plan Assets	2,035	2,224
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	$ 16
Number Of Former Employees And Their Beneficiaries Included In Retiree Population | employees	32
Defined benefit plan, weighted average rate of increase in in per capita cost percent of benefit obligation	9.00%
Other Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)			15
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 293
Fair Value of Plan Assets	$ 2,363	$ 2,310	$ 2,422
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	7.20%	7.50%	7.80%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.50%	3.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.90%	4.50%	3.70%
Defined Benefit Plan, Assumptions Used in Calculating Interest Cost, Discount Rate	2.80%	3.10%	3.70%
Defined Benefit Plan, Expected Amortization of Prior Service Cost (Credit), Next Fiscal Year	$ 0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	121	$ 82	$ 69
Employer contributions	112	100
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	297	$ 300
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year	$ 106
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	$ 2,346	$ 2,297
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	286
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	281
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	273
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	266
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	1,219
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	86
Fair Value of Plan Assets	333	$ 333	$ 369
Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components	$ 8
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	7.50%	7.50%	7.80%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.60%	3.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.00%	4.60%	3.70%
Defined Benefit Plan, Assumptions Used in Calculating Interest Cost, Discount Rate	2.90%	3.30%	3.70%
Defined Benefit Plan, Expected Amortization of Prior Service Cost (Credit), Next Fiscal Year	$ 0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(3)	$ 71	$ 81
Employer contributions	2	2
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	1
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	166	179
Defined benefit plan, benefits paid from Company assets	48	$ 66
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year	$ 9
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	93.00%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	5.00%
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year	7.10%
Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components	$ (6)
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation	196
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation	(163)
Defined Benefit Plan, Fair Value of Plan Assets Excluding Receivables	333	$ 333
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	82
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	90
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	94
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	96
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	481
Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets Excluding Receivables	983	917
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	160	156
Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets Excluding Receivables	1,099	1,078
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	99	121
Fair Value, Inputs, Level 3 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Alternative Investments, Fair Value of Plan Assets, NAV	263	301
Defined Benefit Plan, Fair Value of Plan Assets Excluding Receivables	1	1
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	74	56
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	86	76
Cash and Cash Equivalents [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	6	19
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	86	76
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	6	19
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 Large Cap [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
US Large Cap [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
US Large Cap [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
US Large Cap [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 Large Cap [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
US Large Cap [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
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
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
US Large Cap [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 Smid Cap [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
US Smid Cap [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
US Smid Cap [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
US Smid Cap [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 Smid Cap [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
US Smid Cap [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
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
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
US Smid Cap [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
Canadian Equity [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Canadian Equity [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Canadian Equity [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	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
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
International Equity [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
International Equity [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
International Equity [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
International 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	0
International Equity [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
International Equity [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
International 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
International 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
Emerging Markets Equity [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Emerging Markets Equity [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Emerging Markets Equity [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Emerging Markets 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	0
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
Emerging Markets Equity [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
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
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
Emerging Markets 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
Equity [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	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
Equity [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	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
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
Corporate Bond Securities [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Corporate Bond Securities [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	62	80
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
Corporate 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
Corporate Bond Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Corporate 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	62	80
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
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
Corporate 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
Asset-backed Securities [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Asset-backed Securities [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
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
Asset-backed 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
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Asset-backed 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
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
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
Asset-backed 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
Common And Preferred Stock [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
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
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	0
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
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	316	294
U.S. Equity [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	71	66
U.S. Equity [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	316	294
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	71	66
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
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	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
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
Canadian Equity Other [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	19	29
Canadian Equity Other [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	19	29
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
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
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	327	291
International Equity Other [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	74	71
International Equity Other [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	327	291
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	74	71
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
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	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
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	29	41
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	0
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	29	41
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	235	227
Global Equity [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	235	227
Global Equity [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	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
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	508	530
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	508	530
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	20	0
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	20	0
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	214	204
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	214	204
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	213	203
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	213	203
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	144	141
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	144	141
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
Global Infrastructure [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	10	14
Global Infrastructure [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	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
Global Infrastructure [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	10	14
Commodities Investment [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Commodities Investment [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	9	0
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 1 [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	9	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 2 [Member] | Other Postretirement Benefits Plan [Member]
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	0	0
Commodities Investment [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
Hedge Funds [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	210	230
Hedge Funds [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	39	42
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	210	230
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	39	42
Private Equity Funds [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	43	57
Private Equity Funds [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	11	14
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	43	57
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	11	14
Exchange Traded Funds [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Exchange Traded Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
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
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
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
Mutual Funds [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Mutual Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Mutual Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	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
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
Real Estate [Member] | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	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
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	1	1
Alternative Investments, Fair Value of Plan Assets, NAV	0	0
Common Stock | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	24	0
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	$ 24	$ 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%