Debt - Summary of Total Debt (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Total Debt	$ 22,962	$ 20,897
Payables to Iveco Group	156	502
Total Debt (Including Payables to Iveco Group)	23,118	21,399
Total Bonds
Debt Instrument [Line Items]
Total Debt	8,882	8,464
Asset-backed debt
Debt Instrument [Line Items]
Total Debt	9,751	8,875
Other debt
Debt Instrument [Line Items]
Total Debt	4,329	3,558
Intersegment debt
Debt Instrument [Line Items]
Total Debt	0	0
Industrial Activities
Debt Instrument [Line Items]
Total Debt	4,972	5,485
Payables to Iveco Group	5	334
Total Debt (Including Payables to Iveco Group)	4,977	5,819
Industrial Activities | Total Bonds
Debt Instrument [Line Items]
Total Debt	4,836	5,184
Industrial Activities | Asset-backed debt
Debt Instrument [Line Items]
Total Debt	0	0
Industrial Activities | Other debt
Debt Instrument [Line Items]
Total Debt	73	151
Industrial Activities | Intersegment debt
Debt Instrument [Line Items]
Total Debt	63	150
Financial Services
Debt Instrument [Line Items]
Total Debt	18,941	15,743
Payables to Iveco Group	151	168
Total Debt (Including Payables to Iveco Group)	19,092	15,911
Financial Services | Total Bonds
Debt Instrument [Line Items]
Total Debt	4,046	3,280
Financial Services | Asset-backed debt
Debt Instrument [Line Items]
Total Debt	9,751	8,875
Financial Services | Other debt
Debt Instrument [Line Items]
Total Debt	4,256	3,407
Financial Services | Intersegment debt
Debt Instrument [Line Items]
Total Debt	$ 888	$ 181