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Summary Of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2024
Accounting Policies [Abstract]  
Schedule Of Property, Plant, And Equipment Useful Life
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, down to the estimated salvage value, if any. The salvage value of operating lease assets is estimated based on a number of factors including, but not limited to, the lease term, technological obsolescence, and the expected future demand for refurbished systems.
Depreciation is recognized over the following estimated useful lives:
 Useful Lives
Building
Up to 30 years
Building improvements
Up to 15 years
Leasehold improvementsLesser of useful life or term of lease
Equipment and furniture
5 years
Operating lease assets
1 to 7 years
Computer and office equipment
3 to 5 years
Enterprise-wide software
5 to 8 years
Purchased software
Lesser of 3 years or life of license
Amortized Cost Basis By Year of Origination and Credit Quality Indicator The following table summarizes the amortized cost basis by year of origination and by credit quality for the net investment in sales-type leases as of December 31, 2024 (in millions):
20242023202220212020PriorNet Investment
Credit Rating:
High$73.2 $30.0 $41.7 $31.4 $7.4 $0.7 $184.4 
Moderate82.8 23.7 43.1 27.5 11.2 1.1 189.4 
Low2.1 1.0 0.9 1.5 0.2 — 5.7 
Total$158.1 $54.7 $85.7 $60.4 $18.8 $1.8 $379.5