Borrowings - Schedule of Long-Term Debt (Details) - USD ($)	9 Months Ended
	Jul. 31, 2023	Oct. 31, 2022
Long-term debt
Fair value adjustment related to hedged debt	$ (63,000,000)	$ (78,000,000)
Unamortized debt issuance cost	(60,000,000)	(80,000,000)
Current portion of long-term debt	(178,000,000)	(165,000,000)
Total long-term debt	9,236,000,000	10,796,000,000
U.S. Dollar Global Notes
Long-term debt
Long-term debt	9,041,000,000	10,683,000,000
Payment for debt extinguishment	1,150,000,000
$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	$ 1,149,000,000	1,149,000,000
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	$ 998,000,000	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	$ 503,000,000	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	$ 521,000,000	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
Long-term debt
Long-term debt	$ 997,000,000	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	999,000,000
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	$ 676,000,000	1,000,000,000
Face amount of debt instrument	$ 1,000,000,000
Discount to par (percent)	99.966%
Interest rate (percent)	4.20%
$900 issued at discount to par at a price of 99.841% at 4.75%, due January 2028
Long-term debt
Long-term debt	$ 899,000,000	899,000,000
Face amount of debt instrument	$ 900,000,000
Discount to par (percent)	99.841%
Interest rate (percent)	4.75%
$1,100 issued at discount to par at a price of 99.725% at 5.50%, due January 2033
Long-term debt
Long-term debt	$ 1,097,000,000	1,097,000,000
Face amount of debt instrument	$ 1,100,000,000
Discount to par (percent)	99.725%
Interest rate (percent)	5.50%
$500 issued at par at a price of 100% at 4.75%, due March 2029
Long-term debt
Long-term debt	$ 3,000,000	500,000,000
Face amount of debt instrument	$ 500,000,000
Issuance rate (percent)	100.00%
Interest rate (percent)	4.75%
Payment for debt extinguishment	$ 497,000,000
Other borrowings at 1.58%-8.30%, due in calendar years 2023-2030
Long-term debt
Other borrowings at 1.58%-8.30%, due in calendar years 2023-2030	$ 496,000,000	$ 436,000,000
Other borrowings at 1.58%-8.30%, due in calendar years 2023-2030 | Minimum
Long-term debt
Interest rate (percent)	1.58%
Other borrowings at 1.58%-8.30%, due in calendar years 2023-2030 | Maximum
Long-term debt
Interest rate (percent)	8.30%