FINANCING RECEIVABLES - Past Due Age Analysis (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Apr. 28, 2019	Oct. 28, 2018	Jan. 27, 2019	Apr. 29, 2018	Jan. 28, 2018	Oct. 29, 2017
Financing Receivable, Past Due
Minimum number of days for a financing receivable to be considered past due	30 days
Generally the number of days for a financing receivable to be considered non-performing	90 days	120 days
Generally the number of days before a receivable is delinquent and the estimated uncollectible amount is written off	120 days
Age Analysis of Past Due Financing Receivables Still Accruing Interest and Non-Performing Financing Receivables
Total Past Due	$ 416	$ 532		$ 489
Total Non-Performing	494	259		233
Current	29,956	30,463		28,177
Total Financing Receivables	30,866	31,254		28,899
Less allowance for credit losses	182	178	$ 177	187	$ 190	$ 187
Total financing receivables - net	30,684	31,076		28,712
30-59 Days Past Due
Age Analysis of Past Due Financing Receivables Still Accruing Interest and Non-Performing Financing Receivables
Total Past Due	281	266		257
60-89 Days Past Due
Age Analysis of Past Due Financing Receivables Still Accruing Interest and Non-Performing Financing Receivables
Total Past Due	133	140		122
90 Days or Greater Past Due
Age Analysis of Past Due Financing Receivables Still Accruing Interest and Non-Performing Financing Receivables
Total Past Due	2	126		110
Retail Notes
Age Analysis of Past Due Financing Receivables Still Accruing Interest and Non-Performing Financing Receivables
Total Financing Receivables	21,525			20,522
Less allowance for credit losses	115	113	$ 111	120	$ 123	$ 121
Retail Notes | Agriculture and Turf
Age Analysis of Past Due Financing Receivables Still Accruing Interest and Non-Performing Financing Receivables
Total Past Due	213	270		219
Total Non-Performing	293	201		171
Current	17,644	17,836		17,014
Total Financing Receivables	18,150	18,307		17,404
Retail Notes | Agriculture and Turf | 30-59 Days Past Due
Age Analysis of Past Due Financing Receivables Still Accruing Interest and Non-Performing Financing Receivables
Total Past Due	139	133		117
Retail Notes | Agriculture and Turf | 60-89 Days Past Due
Age Analysis of Past Due Financing Receivables Still Accruing Interest and Non-Performing Financing Receivables
Total Past Due	73	74		58
Retail Notes | Agriculture and Turf | 90 Days or Greater Past Due
Age Analysis of Past Due Financing Receivables Still Accruing Interest and Non-Performing Financing Receivables
Total Past Due	1	63		44
Retail Notes | Construction and Forestry
Age Analysis of Past Due Financing Receivables Still Accruing Interest and Non-Performing Financing Receivables
Total Past Due	131	176		177
Total Non-Performing	124	40		42
Current	3,120	3,101		2,899
Total Financing Receivables	3,375	3,317		3,118
Retail Notes | Construction and Forestry | 30-59 Days Past Due
Age Analysis of Past Due Financing Receivables Still Accruing Interest and Non-Performing Financing Receivables
Total Past Due	90	79		97
Retail Notes | Construction and Forestry | 60-89 Days Past Due
Age Analysis of Past Due Financing Receivables Still Accruing Interest and Non-Performing Financing Receivables
Total Past Due	40	45		44
Retail Notes | Construction and Forestry | 90 Days or Greater Past Due
Age Analysis of Past Due Financing Receivables Still Accruing Interest and Non-Performing Financing Receivables
Total Past Due	1	52		36
Other Financing Receivables | Agriculture and Turf
Age Analysis of Past Due Financing Receivables Still Accruing Interest and Non-Performing Financing Receivables
Total Past Due	49	60		76
Total Non-Performing	67	15		16
Current	7,861	8,274		7,072
Total Financing Receivables	7,977	8,349		7,164
Other Financing Receivables | Agriculture and Turf | 30-59 Days Past Due
Age Analysis of Past Due Financing Receivables Still Accruing Interest and Non-Performing Financing Receivables
Total Past Due	33	36		32
Other Financing Receivables | Agriculture and Turf | 60-89 Days Past Due
Age Analysis of Past Due Financing Receivables Still Accruing Interest and Non-Performing Financing Receivables
Total Past Due	16	16		16
Other Financing Receivables | Agriculture and Turf | 90 Days or Greater Past Due
Age Analysis of Past Due Financing Receivables Still Accruing Interest and Non-Performing Financing Receivables
Total Past Due		8		28
Other Financing Receivables | Construction and Forestry
Age Analysis of Past Due Financing Receivables Still Accruing Interest and Non-Performing Financing Receivables
Total Past Due	23	26		17
Total Non-Performing	10	3		4
Current	1,331	1,252		1,192
Total Financing Receivables	1,364	1,281		1,213
Other Financing Receivables | Construction and Forestry | 30-59 Days Past Due
Age Analysis of Past Due Financing Receivables Still Accruing Interest and Non-Performing Financing Receivables
Total Past Due	19	18		11
Other Financing Receivables | Construction and Forestry | 60-89 Days Past Due
Age Analysis of Past Due Financing Receivables Still Accruing Interest and Non-Performing Financing Receivables
Total Past Due	$ 4	5		4
Other Financing Receivables | Construction and Forestry | 90 Days or Greater Past Due
Age Analysis of Past Due Financing Receivables Still Accruing Interest and Non-Performing Financing Receivables
Total Past Due		$ 3		$ 2