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Fixed Assets and Lease Commitments (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Fixed assets
Fixed assets, at cost	$ 247.3	$ 234.2
Accumulated depreciation and amortization	(136.3)	(124.1)
Fixed assets, net	111.0	110.1	$ 114.1
Building and leasehold improvements
Fixed assets
Fixed assets, at cost	111.9	103.5
Software
Fixed assets
Fixed assets, at cost	50.8	52.5
Equipment
Fixed assets
Fixed assets, at cost	44.5	39.5
Furniture and fixtures
Fixed assets
Fixed assets, at cost	21.4	20.8
Land, improvements and other
Fixed assets
Fixed assets, at cost	$ 18.7	$ 17.9

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Amount before accumulated depreciation, depletion and amortization of 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, and furniture and fixtures.

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