The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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-Publisher SEC

-Name Regulation S-X (SX)

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Amount of required minimum rental payments maturing in the next fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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-Name Accounting Standards Codification

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Amount of required minimum rental payments maturing in the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing in the forth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing in the third fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing in the second fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing after the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

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Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

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-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

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-Paragraph 5

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Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Fixed Assets and Lease Commitments (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Fixed assets
Fixed assets, at cost	$ 169.4	$ 152.2
Accumulated depreciation and amortization	(87.9)	(83.1)
Fixed assets, net	81.5	69.1
Future minimum payments for operating leases
2013	26.9
2014	26.4
2015	24.0
2016	18.3
2017	16.3
Thereafter	64.0
Consolidated rent expense	30.5	29.9	23.3
Building and leasehold improvements
Fixed assets
Fixed assets, at cost	74.7	59.1
Office equipment
Fixed assets
Fixed assets, at cost	38.9	34.1
Furniture and fixtures
Fixed assets
Fixed assets, at cost	16.3	20.6
Land and improvements
Fixed assets
Fixed assets, at cost	18.1	17.9
Computer software
Fixed assets
Fixed assets, at cost	$ 21.4	$ 20.5