Debt - Summary of Total Debt (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total Debt	$ 26,882	$ 27,326	[1]
Financial payables to Iveco Group N.V.	62	146	[1]
Total Debt (including Financial payables to Iveco Group N.V.)	26,944	27,472
Total bonds
Debt Instrument [Line Items]
Total Debt	9,796	9,156
Asset-backed debt
Debt Instrument [Line Items]
Total Debt	11,965	11,716
Other debt
Debt Instrument [Line Items]
Total Debt	5,121	6,454
Intersegment debt
Debt Instrument [Line Items]
Total Debt	0	0
Industrial Activities
Debt Instrument [Line Items]
Total Debt	4,499	4,433
Financial payables to Iveco Group N.V.	4	6
Total Debt (including Financial payables to Iveco Group N.V.)	4,503	4,439
Industrial Activities | Total bonds
Debt Instrument [Line Items]
Total Debt	3,774	3,986
Industrial Activities | Asset-backed debt
Debt Instrument [Line Items]
Total Debt	0	0
Industrial Activities | Other debt
Debt Instrument [Line Items]
Total Debt	269	146
Industrial Activities | Intersegment debt
Debt Instrument [Line Items]
Total Debt	456	301
Financial Services
Debt Instrument [Line Items]
Total Debt	23,173	23,721
Financial payables to Iveco Group N.V.	58	140
Total Debt (including Financial payables to Iveco Group N.V.)	23,231	23,861
Financial Services | Total bonds
Debt Instrument [Line Items]
Total Debt	6,022	5,170
Financial Services | Asset-backed debt
Debt Instrument [Line Items]
Total Debt	11,965	11,716
Financial Services | Other debt
Debt Instrument [Line Items]
Total Debt	4,852	6,308
Financial Services | Intersegment debt
Debt Instrument [Line Items]
Total Debt	$ 334	$ 527

[1] See Note 23 Immaterial Revision of Prior Period Financial Statements.