| Component: (Network and Table) | |
|---|---|
| Network | 004070 - Disclosure - Property, Plant and Equipment (Details) (http://www.ibm.com/role/DisclosurePropertyPlantAndEquipmentDetails) |
| Table | Property, Plant and Equipment [Table] |
| Reporting Entity [Axis] | 0000051143 (http://www.sec.gov/CIK) |
| Property, Plant and Equipment [Line Items] | Period [Axis] | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2013-12-31 | 2012-12-31 | 2011-12-31 | |||||||||||
| Property, Plant and Equipment, Type [Axis] | Property, Plant and Equipment, Type [Axis] | Property, Plant and Equipment, Type [Axis] | |||||||||||
| Land and Land Improvements [Member] | Building and Building Improvements [Member] | Equipment [Member] | Property, Plant and Equipment Excluding Rental Machines [Member] | Equipment Leased to Other Party [Member] | Property, Plant and Equipment, Type [Domain] | Land and Land Improvements [Member] | Building and Building Improvements [Member] | Equipment [Member] | Property, Plant and Equipment Excluding Rental Machines [Member] | Equipment Leased to Other Party [Member] | Property, Plant and Equipment, Type [Domain] | Property, Plant and Equipment Excluding Rental Machines [Member] | |
Property, plant and equipment (Note G) | 40,475,000,000 | 40,501,000,000 | |||||||||||
Less: Accumulated depreciation (Note G) | 26,654,000,000 | 26,505,000,000 | |||||||||||
Property, plant and equipment - net (Note G) | 13,821,000,000 | 13,996,000,000 | |||||||||||