Debt - Summary of Total Debt (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Total Debt	$ 27,326	$ 22,962
Financial payables to Iveco Group N.V.	146	156
Total Debt (including Financial payables to Iveco Group N.V.)	27,472	23,118
Total bonds
Debt Instrument [Line Items]
Total Debt	9,156	8,882
Asset-backed debt
Debt Instrument [Line Items]
Total Debt	11,716	9,751
Other debt
Debt Instrument [Line Items]
Total Debt	6,454	4,329
Intersegment debt
Debt Instrument [Line Items]
Total Debt	0	0
Industrial Activities
Debt Instrument [Line Items]
Total Debt	4,433	4,972
Financial payables to Iveco Group N.V.	6	5
Total Debt (including Financial payables to Iveco Group N.V.)	4,439	4,977
Industrial Activities | Total bonds
Debt Instrument [Line Items]
Total Debt	3,986	4,836
Industrial Activities | Asset-backed debt
Debt Instrument [Line Items]
Total Debt	0	0
Industrial Activities | Other debt
Debt Instrument [Line Items]
Total Debt	146	73
Industrial Activities | Intersegment debt
Debt Instrument [Line Items]
Total Debt	301	63
Financial Services
Debt Instrument [Line Items]
Total Debt	23,721	18,941
Financial payables to Iveco Group N.V.	140	151
Total Debt (including Financial payables to Iveco Group N.V.)	23,861	19,092
Financial Services | Total bonds
Debt Instrument [Line Items]
Total Debt	5,170	4,046
Financial Services | Asset-backed debt
Debt Instrument [Line Items]
Total Debt	11,716	9,751
Financial Services | Other debt
Debt Instrument [Line Items]
Total Debt	6,308	4,256
Financial Services | Intersegment debt
Debt Instrument [Line Items]
Total Debt	$ 527	$ 888