Borrowings - Schedule of Long-Term Debt (Details) - USD ($)	Apr. 30, 2022	Oct. 31, 2021
Long-term debt
Fair value adjustment related to hedged debt	$ (58,000,000)	$ (16,000,000)
Unamortized debt issuance cost	(66,000,000)	(51,000,000)
Current portion of long-term debt	(665,000,000)	(672,000,000)
Total long-term debt	8,304,000,000	6,386,000,000
U.S. Dollar Global Notes
Long-term debt
Long-term debt	8,685,000,000	6,686,000,000
$500 issued at discount to par at a price of 99.771% at 4.05%, due September 2022
Long-term debt
Long-term debt	499,000,000	499,000,000
Face amount of debt instrument	$ 500,000,000
Discount to par (percent)	99.771%
Interest rate (percent)	4.05%
$1,200 issued at discount to par at a price of 99.863% at 6.00%, due September 2041
Long-term debt
Long-term debt	$ 1,199,000,000	1,199,000,000
Face amount of debt instrument	$ 1,200,000,000
Discount to par (percent)	99.863%
Interest rate (percent)	6.00%
$1,150 issued at discount to par at a price of 99.769% at 2.2%, due June 2025
Long-term debt
Long-term debt	$ 1,148,000,000	1,148,000,000
Face amount of debt instrument	$ 1,150,000,000
Discount to par (percent)	99.769%
Interest rate (percent)	2.20%
$1,000 issued at discount to par at a price of 99.718% at 3.0%, due June 2027
Long-term debt
Long-term debt	$ 997,000,000	997,000,000
Face amount of debt instrument	$ 1,000,000,000
Discount to par (percent)	99.718%
Interest rate (percent)	3.00%
$850 issued at discount to par at a price of 99.790% at 3.4%, due June 2030
Long-term debt
Long-term debt	$ 848,000,000	848,000,000
Face amount of debt instrument	$ 850,000,000
Discount to par (percent)	99.79%
Interest rate (percent)	3.40%
$1,000 issued at discount to par at a price of 99.808% at 1.45%, due June 2026
Long-term debt
Long-term debt	$ 999,000,000	999,000,000
Face amount of debt instrument	$ 1,000,000,000
Discount to par (percent)	99.808%
Interest rate (percent)	1.45%
$1,000 issued at discount to par at a price of 99.573% at 2.65%, due June 2031(2)
Long-term debt
Long-term debt	$ 996,000,000	996,000,000
Face amount of debt instrument	$ 1,000,000,000
Discount to par (percent)	99.573%
Interest rate (percent)	2.65%
$1,000 issued at discount to par at a price of 99.767% at 4.00%, due April 2029
Long-term debt
Long-term debt	$ 999,000,000	0
Face amount of debt instrument	$ 1,000,000,000
Discount to par (percent)	99.767%
Interest rate (percent)	4.00%
$1,000 issued at discount to par at a price of 99.966% at 4.20%, due April 2032
Long-term debt
Long-term debt	$ 1,000,000,000	0
Face amount of debt instrument	$ 1,000,000,000
Discount to par (percent)	99.966%
Interest rate (percent)	4.20%
Other borrowings at 0.51%-9.00%, due in calendar years 2022-2029
Long-term debt
Other borrowings at 0.51%-9.00%, due in calendar years 2022-2029	$ 408,000,000	$ 439,000,000
Other borrowings at 0.51%-9.00%, due in calendar years 2022-2029 | Minimum
Long-term debt
Interest rate (percent)	0.51%
Other borrowings at 0.51%-9.00%, due in calendar years 2022-2029 | Maximum
Long-term debt
Interest rate (percent)	9.00%