Receivables - Past Due Age Analysis (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Apr. 28, 2019	Oct. 28, 2018	Apr. 29, 2018
Receivable, Past Due
Minimum number of days for a receivable to be considered past due	30 days
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	$ 369.0	$ 483.2	$ 447.6
Total Non-Performing	381.7	142.0	117.2
Current	31,936.9	30,021.5	29,291.2
Total Receivables	32,687.6	30,646.7	29,856.0
30-59 Days Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	243.2	236.9	231.6
60-89 Days Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	124.2	129.4	111.8
90 Days or Greater Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	$ 1.6	$ 116.9	104.2
Retail notes
Receivable, Past Due
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 Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Receivables	$ 18,015.0		16,907.0
Retail notes | Agriculture and turf
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	184.2	$ 244.7	195.3
Total Non-Performing	197.7	95.9	70.6
Current	14,621.5	14,838.6	13,917.1
Total Receivables	15,003.4	15,179.2	14,183.0
Retail notes | Agriculture and turf | 30-59 Days Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	116.7	119.7	104.1
Retail notes | Agriculture and turf | 60-89 Days Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	66.8	67.5	51.1
Retail notes | Agriculture and turf | 90 Days or Greater Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	0.7	57.5	40.1
Retail notes | Construction and forestry
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	126.5	170.4	167.2
Total Non-Performing	110.7	28.5	28.8
Current	2,774.4	2,732.8	2,528.0
Total Receivables	3,011.6	2,931.7	2,724.0
Retail notes | Construction and forestry | 30-59 Days Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	86.7	75.9	89.7
Retail notes | Construction and forestry | 60-89 Days Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	$ 39.8	44.8	43.2
Retail notes | Construction and forestry | 90 Days or Greater Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due		$ 49.7	34.3
Revolving charge accounts
Receivable, Past Due
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 Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Receivables	$ 3,235.9	$ 3,797.6	3,152.5
Revolving charge accounts | Agriculture and turf
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	35.4	35.7	51.5
Total Non-Performing	47.1	1.3	1.5
Current	3,059.2	3,659.2	3,015.3
Total Receivables	3,141.7	3,696.2	3,068.3
Revolving charge accounts | Agriculture and turf | 30-59 Days Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	23.6	22.8	16.4
Revolving charge accounts | Agriculture and turf | 60-89 Days Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	11.8	8.3	9.7
Revolving charge accounts | Agriculture and turf | 90 Days or Greater Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due		4.6	25.4
Revolving charge accounts | Construction and forestry
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	5.0	6.0	5.2
Total Non-Performing	1.0		0.1
Current	88.2	95.4	78.9
Total Receivables	94.2	101.4	84.2
Revolving charge accounts | Construction and forestry | 30-59 Days Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	3.7	4.0	2.9
Revolving charge accounts | Construction and forestry | 60-89 Days Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	$ 1.3	1.2	1.6
Revolving charge accounts | Construction and forestry | 90 Days or Greater Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due		0.8	0.7
Wholesale receivables
Receivable, Past Due
Generally the number of days for a financing receivable to be considered non-performing	60 days
Generally the number of days before a receivable is delinquent and the estimated uncollectible amount is written off	60 days
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Receivables	$ 10,809.7	7,967.6	9,129.7
Wholesale receivables | Agriculture and turf
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	8.0	3.2	6.9
Total Non-Performing	6.2	7.3	5.9
Current	8,606.6	6,135.5	7,552.2
Total Receivables	8,620.8	6,146.0	7,565.0
Wholesale receivables | Agriculture and turf | 30-59 Days Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	5.1	1.7	3.0
Wholesale receivables | Agriculture and turf | 60-89 Days Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	2.1	0.4	1.8
Wholesale receivables | Agriculture and turf | 90 Days or Greater Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	0.8	1.1	2.1
Wholesale receivables | Construction and forestry
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	0.4	1.2	0.6
Total Non-Performing	4.5
Current	2,184.0	1,820.4	1,564.1
Total Receivables	2,188.9	1,821.6	1,564.7
Wholesale receivables | Construction and forestry | 30-59 Days Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	$ 0.4	$ 1.2	0.6
Financing leases
Receivable, Past Due
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 Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Receivables	$ 627.0	$ 770.6	666.8
Financing leases | Agriculture and turf
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	6.2	18.3	16.8
Total Non-Performing	11.6	8.4	9.3
Current	462.9	597.5	494.8
Total Receivables	480.7	624.2	520.9
Financing leases | Agriculture and turf | 30-59 Days Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	4.4	9.9	12.7
Financing leases | Agriculture and turf | 60-89 Days Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	1.7	6.1	3.2
Financing leases | Agriculture and turf | 90 Days or Greater Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	0.1	2.3	0.9
Financing leases | Construction and forestry
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	3.3	3.7	4.1
Total Non-Performing	2.9	0.6	1.0
Current	140.1	142.1	140.8
Total Receivables	146.3	146.4	145.9
Financing leases | Construction and forestry | 30-59 Days Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	2.6	1.7	2.2
Financing leases | Construction and forestry | 60-89 Days Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due	$ 0.7	1.1	1.2
Financing leases | Construction and forestry | 90 Days or Greater Past Due
Age Analysis of Past Due Receivables That Are Still Accruing Interest and Non-Performing Receivables
Total Past Due		$ 0.9	$ 0.7