21. Property, plant and equipment

  Land and
buildings
$ million
Plant,
equipment
and vehicles
$ million
Assets under
construction
$ million
Total
$ million
Cost 
As at 29 December 2007699.52,563.7104.63,367.8
Additions11.242.6126.8180.6
Acquisition of subsidiaries5.83.49.2
Disposal of subsidiaries(0.2)(0.2)
Transfer from assets under construction16.1132.5(148.6)
Transfer from assets held for sale6.26.2
Disposals(6.1)(90.4)(1.4)(97.9)
Foreign currency translation(41.3)(237.8)(6.0)(285.1)
As at 3 January 2009691.42,413.875.43,180.6
Additions1.616.197.5115.2
Acquisition of subsidiaries2.84.60.68.0
Transfer from assets under construction24.880.8(105.6)
Transfer to assets held for sale(16.6)(16.6)
Disposals(16.8)(100.5)(0.3)(117.6)
Foreign currency translation22.9133.22.9159.0
As at 2 January 2010710.12,548.070.53,328.6
 
Accumulated depreciation and impairment 
As at 29 December 2007252.91,700.51,953.4
Depreciation charge for the period22.9180.2203.1
Disposal of subsidiaries(0.1)(0.1)
Transfer from assets held for sale3.53.5
Disposals(3.6)(83.9)(87.5)
Impairments10.1103.7113.8
Foreign currency translation(10.7)(162.2)(172.9)
As at 3 January 2009275.11,738.22,013.3
Depreciation charge for the period22.0150.2172.2
Transfer to assets held for sale(4.8)(4.8)
Disposals(11.2)(95.3)(106.5)
Impairments15.78.52.626.8
Foreign currency translation9.295.40.2104.8
As at 2 January 2010306.01,897.02.82,205.8
 
Carrying amount 
As at 3 January 2009416.3675.675.41,167.3
As at 2 January 2010404.1651.067.71,122.8

During 2009, impairments totalling $26.8 million were recognised in relation to property, plant and equipment that has become impaired as a consequence of the Group's restructuring initiatives (none of these impairments was individually significant).

During 2008, against the background of the weakness of the Group's end markets, particularly the automotive OE markets in North America and Europe and the residential construction market in North America, management reviewed the recoverability of the assets of the Group's businesses that were exposed to those markets. As a result of that review, the following impairments, totalling $113.8 million, were recognised in relation to property, plant and equipment:

Impairments are analysed by operating segment in note 5.

Land and buildings include freehold land with a carrying value of $63.3 million (3 January 2009: $63.5 million) that is not depreciated.

Property, plant and equipment includes assets held under finance leases with a carrying amount of $6.3 million (3 January 2009: $9.9 million). Obligations under finance leases are secured by a lessor's charge over the leased assets.

Property, plant and equipment has been pledged as security for $0.9 million (3 January 2009: $nil) outstanding under secured bank loans.