| Component: (Network and Table) | |
|---|---|
| Network | 004205 - Disclosure - Segments (Revenue and Plant Property Equipment by Countries) (Details 6) (http://www.ibm.com/role/DisclosureSegmentsRevenueAndPlantPropertyEquipmentByCountriesDetails6) |
| Table | Schedule of Revenues from External Customers and Long-Lived Assets [Table] |
| Reporting Entity [Axis] | 0000051143 (http://www.sec.gov/CIK) |
| Period [Axis] | Segment Information | All Countries [Axis] | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| UNITED STATES | JAPAN | Other Countries [Member] | All Countries [Domain] | |||||||
| Consolidation Items [Axis] | Consolidation Items [Axis] | Consolidation Items [Axis] | Consolidation Items [Axis] | |||||||
| ReportableGeographicalComponentsMember | ReportableGeographicalComponentsMember | ReportableGeographicalComponentsMember | ReportableGeographicalComponentsMember | Consolidation Items [Domain] | ||||||
| Property, Plant and Equipment, Type [Axis] | Property, Plant and Equipment, Type [Axis] | Property, Plant and Equipment, Type [Axis] | Property, Plant and Equipment, Type [Axis] | Property, Plant and Equipment, Type [Axis] | ||||||
| Property, Plant and Equipment Excluding Rental Machines [Member] | Property, Plant and Equipment, Type [Domain] | Property, Plant and Equipment, Type [Domain] | Property, Plant and Equipment Excluding Rental Machines [Member] | Property, Plant and Equipment, Type [Domain] | Property, Plant and Equipment Excluding Rental Machines [Member] | Property, Plant and Equipment, Type [Domain] | Property, Plant and Equipment Excluding Rental Machines [Member] | Property, Plant and Equipment, Type [Domain] | ||
2013-01-01 - 2013-12-31 | Revenue | 99,751,000,000 | ||||||||
Net Plant, Property and Equipment | 12,979,000,000 | 13,821,000,000 | ||||||||
2012-01-01 - 2012-12-31 | Revenue | 104,507,000,000 | ||||||||
Net Plant, Property and Equipment | 12,854,000,000 | 13,996,000,000 | ||||||||
2011-01-01 - 2011-12-31 | Revenue | 106,916,000,000 | ||||||||
Net Plant, Property and Equipment | 12,457,000,000 | |||||||||