Financial Instruments (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Financial Instruments
Period within which the funds held as collateral and posted as collateral are transferred from or to counterparties	2 days
Cash held as collateral from counterparties under collateralized arrangements	$ 30	$ 198
Cash posted as collateral under collateralized arrangements	283	72
Cash posted as collateral to counterparties through reuse	30	49
Cash posted as collateral to counterparties in cash	253	23
Derivatives, Fair Value
Total derivatives, gross notional amount	51,875	50,262
Other Current Assets
Derivatives, Fair Value
Derivative asset, fair value	220	304
Long-Term Financing Receivables and Other Assets
Derivatives, Fair Value
Derivative asset, fair value	232	332
Other Accrued Liabilities
Derivatives, Fair Value
Derivative liability, fair value	437	396
Long-Term Other Liabilities
Derivatives, Fair Value
Derivative liability, fair value	219	122
Cash flow hedges
Derivatives, Fair Value
Maturity period of foreign currency cash flow hedges	12 months
Maximum duration of lease term for which lease-related forward contracts and intercompany lease loan forward contracts can be extended	5 years
Derivatives designated as hedging instruments
Derivatives, Fair Value
Total derivatives, gross notional amount	35,483	28,992
Derivatives designated as hedging instruments | Other Current Assets
Derivatives, Fair Value
Derivative asset, fair value	140	217
Derivatives designated as hedging instruments | Long-Term Financing Receivables and Other Assets
Derivatives, Fair Value
Derivative asset, fair value	205	315
Derivatives designated as hedging instruments | Other Accrued Liabilities
Derivatives, Fair Value
Derivative liability, fair value	361	313
Derivatives designated as hedging instruments | Long-Term Other Liabilities
Derivatives, Fair Value
Derivative liability, fair value	199	103
Derivatives designated as hedging instruments | Fair value hedges | Interest rate contracts
Derivatives, Fair Value
Total derivatives, gross notional amount	11,100	7,900
Derivatives designated as hedging instruments | Fair value hedges | Interest rate contracts | Other Current Assets
Derivatives, Fair Value
Derivative asset, fair value	31	43
Derivatives designated as hedging instruments | Fair value hedges | Interest rate contracts | Long-Term Financing Receivables and Other Assets
Derivatives, Fair Value
Derivative asset, fair value	125	276
Derivatives designated as hedging instruments | Fair value hedges | Interest rate contracts | Long-Term Other Liabilities
Derivatives, Fair Value
Derivative liability, fair value	107
Derivatives designated as hedging instruments | Cash flow hedges | Foreign exchange contracts
Derivatives, Fair Value
Total derivatives, gross notional amount	22,463	19,409
Derivatives designated as hedging instruments | Cash flow hedges | Foreign exchange contracts | Other Current Assets
Derivatives, Fair Value
Derivative asset, fair value	79	160
Derivatives designated as hedging instruments | Cash flow hedges | Foreign exchange contracts | Long-Term Financing Receivables and Other Assets
Derivatives, Fair Value
Derivative asset, fair value	40	24
Derivatives designated as hedging instruments | Cash flow hedges | Foreign exchange contracts | Other Accrued Liabilities
Derivatives, Fair Value
Derivative liability, fair value	341	277
Derivatives designated as hedging instruments | Cash flow hedges | Foreign exchange contracts | Long-Term Other Liabilities
Derivatives, Fair Value
Derivative liability, fair value	80	79
Derivatives designated as hedging instruments | Net investment hedges | Foreign exchange contracts
Derivatives, Fair Value
Total derivatives, gross notional amount	1,920	1,683
Derivatives designated as hedging instruments | Net investment hedges | Foreign exchange contracts | Other Current Assets
Derivatives, Fair Value
Derivative asset, fair value	30	14
Derivatives designated as hedging instruments | Net investment hedges | Foreign exchange contracts | Long-Term Financing Receivables and Other Assets
Derivatives, Fair Value
Derivative asset, fair value	40	15
Derivatives designated as hedging instruments | Net investment hedges | Foreign exchange contracts | Other Accrued Liabilities
Derivatives, Fair Value
Derivative liability, fair value	20	36
Derivatives designated as hedging instruments | Net investment hedges | Foreign exchange contracts | Long-Term Other Liabilities
Derivatives, Fair Value
Derivative liability, fair value	12	24
Derivatives not designated as hedging instruments
Derivatives, Fair Value
Total derivatives, gross notional amount	16,392	21,270
Derivatives not designated as hedging instruments | Other Current Assets
Derivatives, Fair Value
Derivative asset, fair value	80	87
Derivatives not designated as hedging instruments | Long-Term Financing Receivables and Other Assets
Derivatives, Fair Value
Derivative asset, fair value	27	17
Derivatives not designated as hedging instruments | Other Accrued Liabilities
Derivatives, Fair Value
Derivative liability, fair value	76	83
Derivatives not designated as hedging instruments | Long-Term Other Liabilities
Derivatives, Fair Value
Derivative liability, fair value	20	19
Derivatives not designated as hedging instruments | Foreign exchange contracts
Derivatives, Fair Value
Total derivatives, gross notional amount	16,048	18,687
Derivatives not designated as hedging instruments | Foreign exchange contracts | Other Current Assets
Derivatives, Fair Value
Derivative asset, fair value	72	61
Derivatives not designated as hedging instruments | Foreign exchange contracts | Long-Term Financing Receivables and Other Assets
Derivatives, Fair Value
Derivative asset, fair value	26	17
Derivatives not designated as hedging instruments | Foreign exchange contracts | Other Accrued Liabilities
Derivatives, Fair Value
Derivative liability, fair value	76	51
Derivatives not designated as hedging instruments | Foreign exchange contracts | Long-Term Other Liabilities
Derivatives, Fair Value
Derivative liability, fair value	20	19
Derivatives not designated as hedging instruments | Interest rate contracts
Derivatives, Fair Value
Total derivatives, gross notional amount		2,200
Derivatives not designated as hedging instruments | Interest rate contracts | Other Current Assets
Derivatives, Fair Value
Derivative asset, fair value		25
Derivatives not designated as hedging instruments | Interest rate contracts | Other Accrued Liabilities
Derivatives, Fair Value
Derivative liability, fair value		29
Derivatives not designated as hedging instruments | Other derivatives
Derivatives, Fair Value
Total derivatives, gross notional amount	344	383
Derivatives not designated as hedging instruments | Other derivatives | Other Current Assets
Derivatives, Fair Value
Derivative asset, fair value	8	1
Derivatives not designated as hedging instruments | Other derivatives | Long-Term Financing Receivables and Other Assets
Derivatives, Fair Value
Derivative asset, fair value	1
Derivatives not designated as hedging instruments | Other derivatives | Other Accrued Liabilities
Derivatives, Fair Value
Derivative liability, fair value		$ 3