Borrowings -Term Debt (Details) - USD ($)		3 Months Ended		6 Months Ended
		Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016	Apr. 01, 2017	Oct. 31, 2016
Debt Instrument [Line Items]
Total	[1]	$ 11,904,000,000		$ 11,904,000,000			$ 12,168,000,000
Fair value adjustment related to hedged debt		(122,000,000)		(122,000,000)			103,000,000
Unamortized debt issuance costs(3)		(47,000,000)		(47,000,000)			(50,000,000)
Less: current portion		(1,217,000,000)		(1,217,000,000)			(2,772,000,000)
Face amount of debt instrument						$ 3,500,000,000
Interest expense on borrowings recognized in Condensed Consolidated and Combined Statements of Earnings
Financing interest		65,000,000	$ 61,000,000	131,000,000	$ 119,000,000
Interest expense		77,000,000	79,000,000	169,000,000	152,000,000
Total interest expense		142,000,000	$ 140,000,000	300,000,000	$ 271,000,000
$2,250 issued at discount to par at a price of 99.944% in October 2015 at 2.45%, due October 5, 2017, interest payable semi-annually on April 5 and October 5 of each year
Debt Instrument [Line Items]
Total		$ 750,000,000		$ 750,000,000			2,249,000,000
Discount to par (as a percent)		99.944%		99.944%
Interest rate (as a percent)		2.45%		2.45%
Face amount of debt instrument		$ 2,250,000,000.00		$ 2,250,000,000.00
$3,000 issued at discount to par at a price of 99.972% in October 2015 at 3.6%, due October 15, 2020, interest payable semi-annually on April 15 and October 15 of each year
Debt Instrument [Line Items]
Discount to par (as a percent)		99.872%		99.872%
Interest rate (as a percent)		2.85%		2.85%
Face amount of debt instrument		$ 2,650,000,000		$ 2,650,000,000
$3,000 issued at discount to par at a price of 99.972% in October 2015 at 3.6%, due October 15, 2020, interest payable semi-annually on April 15 and October 15 of each year | LIBOR
Debt Instrument [Line Items]
Total		2,648,000,000		2,648,000,000			2,648,000,000
$2,500 issued at discount to par at a price of 99.725% in October 2015 at 4.9%, due October 15, 2025, interest payable semi-annually on April 15 and October 15 of each year
Debt Instrument [Line Items]
Total		$ 2,999,000,000		$ 2,999,000,000			2,999,000,000
Discount to par (as a percent)		99.972%		99.972%
Interest rate (as a percent)		3.60%		3.60%
Face amount of debt instrument		$ 3,000,000,000		$ 3,000,000,000
$750 issued at discount to par at a price of 99.942% in October 2015 at 6.2%, due October 15, 2035, interest payable semi-annually on April 15 and October 15 of each year
Debt Instrument [Line Items]
Discount to par (as a percent)		99.802%		99.802%
Interest rate (as a percent)		4.40%		4.40%
Face amount of debt instrument		$ 1,350,000,000		$ 1,350,000,000
$750 issued at discount to par at a price of 99.942% in October 2015 at 6.2%, due October 15, 2035, interest payable semi-annually on April 15 and October 15 of each year | LIBOR
Debt Instrument [Line Items]
Total		1,348,000,000		1,348,000,000			1,348,000,000
$1,500 issued at discount to par at a price of 99.932% in October 2015 at 6.35%, due October 15, 2045, interest payable semi-annually on April 15 and October 15 of each year
Debt Instrument [Line Items]
Total		$ 2,494,000,000		$ 2,494,000,000			2,494,000,000
Discount to par (as a percent)		99.725%		99.725%
Interest rate (as a percent)		4.90%		4.90%
Face amount of debt instrument		$ 2,500,000,000		$ 2,500,000,000
$350 issued at par in October 2015 at three-month USD LIBOR plus 1.74%, due October 5, 2017, interest payable quarterly on January 5, April 5, July 5 and October 5 of each year
Debt Instrument [Line Items]
Total		$ 750,000,000		$ 750,000,000			750,000,000
Discount to par (as a percent)		99.942%		99.942%
Interest rate (as a percent)		6.20%		6.20%
Face amount of debt instrument		$ 750,000,000		$ 750,000,000
$250 issued at par in October 2015 at three-month USD LIBOR plus 1.93%, due October 5, 2018, interest payable quarterly on January 5, April 5, July 5 and October 5 of each year
Debt Instrument [Line Items]
Total		$ 1,499,000,000		$ 1,499,000,000			1,499,000,000
Discount to par (as a percent)		99.932%		99.932%
Interest rate (as a percent)		6.35%		6.35%
Face amount of debt instrument		$ 1,500,000,000		$ 1,500,000,000
$2,650 issued at discount to par at a price of 99.872% in October 2015 at 2.85%, due October 5, 2018, interest payable semi-annually on April 5 and October 5 of each year
Debt Instrument [Line Items]
Total		350,000,000		350,000,000			350,000,000
$2,650 issued at discount to par at a price of 99.872% in October 2015 at 2.85%, due October 5, 2018, interest payable semi-annually on April 5 and October 5 of each year | LIBOR
Debt Instrument [Line Items]
Face amount of debt instrument		350,000,000		$ 350,000,000
Basis spread				1.74%
$1,350 issued at discount to par at a price of 99.802% in October 2015 at 4.4%, due October 15, 2022, interest payable semi-annually on April 15 and October 15 of each year
Debt Instrument [Line Items]
Total		250,000,000		$ 250,000,000			250,000,000
$1,350 issued at discount to par at a price of 99.802% in October 2015 at 4.4%, due October 15, 2022, interest payable semi-annually on April 15 and October 15 of each year | LIBOR
Debt Instrument [Line Items]
Face amount of debt instrument		250,000,000		$ 250,000,000
Basis spread				1.93%
Other, including capital lease obligations, at 0.00%-8.47%, due in calendar years 2016-2022
Debt Instrument [Line Items]
Other, including capital lease obligations		$ 202,000,000		$ 202,000,000			300,000,000
Minimum interest rate (as a percent)		0.00%
Maximum interest rate (as a percent)		6.05%
Other, including capital lease obligations, at 0.00%-8.47%, due in calendar years 2016-2022 | Financial Services
Debt Instrument [Line Items]
Other, including capital lease obligations		$ 136,000,000		$ 136,000,000			$ 181,000,000

[1] During the first quarter of fiscal 2017, the Company adopted ASU 2015-03, which simplifies the presentation of debt issuance costs by requiring debt issuance costs to be presented as a deduction from the corresponding debt liability rather than an asset that is amortized. The Company adopted the standard retrospectively for the prior period presented.