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Property and Equipment
 12 Months Ended
Dec. 31, 2011
Property and Equipment [Abstract]  
Property and Equipment
PROPERTY AND EQUIPMENT

Changes in property and equipment balances are as follows:
$ in millions
Technology and Other Equipment
 
Software
 
Land and Buildings*
 
Work In Process
 
Leasehold Improvements
 
Total
Cost:
 
 
 
 
 
 
 
 
 
 
 
January 1, 2011
318.4

 
266.1

 
72.1

 
19.6

 
159.2

 
835.4

Foreign exchange
(2.2
)
 
(0.6
)
 
(0.7
)
 
(0.5
)
 
(0.8
)
 
(4.8
)
Additions
14.3

 
3.8

 
1.2

 
73.7

 
17.0

 
110.0

Transfers
15.8

 
22.3

 
—

 
(48.6
)
 
10.5

 
—

Disposals
(79.1
)
 
(7.6
)
 
(6.9
)
 
—

 
(9.3
)
 
(102.9
)
December 31, 2011
267.2

 
284.0

 
65.7

 
44.2

 
176.6

 
837.7

Accumulated depreciation:
 
 
 
 
 
 
 
 
 
 
 
January 1, 2011
(261.7
)
 
(184.0
)
 
(8.4
)
 
—

 
(108.9
)
 
(563.0
)
Foreign exchange
1.4

 
0.7

 
0.1

 
—

 
0.8

 
3.0

Depreciation expense
(20.1
)
 
(27.9
)
 
(1.3
)
 
—

 
(11.0
)
 
(60.3
)
Disposals
77.7

 
8.0

 
0.5

 
—

 
9.2

 
95.4

December 31, 2011
(202.7
)
 
(203.2
)
 
(9.1
)
 
—

 
(109.9
)
 
(524.9
)
Net book value:
 
 
 
 
 
 
 
 
 
 
 
December 31, 2011
64.5

 
80.8

 
56.6

 
44.2

 
66.7

 
312.8

Cost:
 
 
 
 
 
 
 
 
 
 
 
January 1, 2010
282.5

 
231.3

 
72.5

 
11.5

 
141.3

 
739.1

Foreign exchange
1.7

 
(1.1
)
 
(1.4
)
 
(0.1
)
 
1.3

 
0.4

Additions**
10.0

 
7.4

 
1.0

 
78.2

 
3.5

 
100.1

Transfers
28.3

 
28.6

 
—

 
(70.0
)
 
13.1

 
—

Disposals
(4.1
)
 
(0.1
)
 
—

 
—

 
—

 
(4.2
)
December 31, 2010
318.4

 
266.1

 
72.1

 
19.6

 
159.2

 
835.4

Accumulated depreciation:
 
 
 
 
 
 
 
 
 
 
 
January 1, 2010
(245.5
)
 
(165.3
)
 
(7.5
)
 
—

 
(100.1
)
 
(518.4
)
Foreign exchange
(2.1
)
 
0.8

 
0.3

 
—

 
(1.4
)
 
(2.4
)
Depreciation expense
(18.2
)
 
(19.6
)
 
(1.2
)
 
—

 
(7.4
)
 
(46.4
)
Disposals
4.1

 
0.1

 
—

 
—

 
—

 
4.2

December 31, 2010
(261.7
)
 
(184.0
)
 
(8.4
)
 
—

 
(108.9
)
 
(563.0
)
Net book value:
 
 
 
 
 
 
 
 
 
 
 
December 31, 2010
56.7

 
82.1

 
63.7

 
19.6

 
50.3

 
272.4


____________

*
Included within land and buildings are $33.6 million at December 31, 2011 (2010: $33.2 million) in non-depreciable land assets.
**
Included within additions is $5.4 million at December 31, 2010 related to the acquired businesses.