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Summary Of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2017
Accounting Policies [Abstract]  
Estimated Useful Lives Of The Assets
Property, plant, and equipment are stated at cost, net of accumulated depreciation. Depreciation is computed on a straight-line basis over the estimated useful lives of the assets generally as follows:
 
Useful Lives
Building
Up to 30 years
Building improvements
Up to 15 years
Leasehold improvements
Lesser of useful life or term of lease
Equipment and furniture
5 years
Operating lease assets
Greater of lease term or 1 to 5 years
Computer and office equipment
3 years
Enterprise-wide software
5 years
Purchased software
Lesser of 3 years or life of license
The following table provides details of the property, plant, and equipment, net (in millions):
 
December 31,
 
2017
 
2016
Property, plant, and equipment, net:
 
 
 
Land
$
174.8

 
$
131.7

Building and building/leasehold improvements
230.5

 
199.5

Machinery and equipment
224.8

 
217.7

Operating lease assets
66.1

 
34.7

Computer and office equipment
44.8

 
41.3

Capitalized software
135.6

 
114.2

Construction-in-process
83.5

 
41.2

Gross property, plant, and equipment
960.1

 
780.3

Less: Accumulated depreciation*
(347.0
)
 
(321.9
)
Total property, plant, and equipment, net
$
613.1

 
$
458.4

 
 
 
 
*Accumulated depreciation associated with operating lease assets
$
(13.8
)
 
$
(6.8
)