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Schedule II - Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2023
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule II - Valuation and Qualifying Accounts
Juniper Networks, Inc.
Schedule II - Valuation and Qualifying Accounts
Years Ended December 31, 2023, 2022, and 2021
 (In millions)
Allowance for Doubtful AccountsBalance at
Beginning of
Year		Charged to
(Reversed from)
Costs and
Expenses		Write-offs,
Net of
Recoveries		Balance at
End of
Year
2023$12.0 $(0.8)$— $11.2 
2022$6.7 $5.3 $— $12.0 
2021$9.9 $(3.2)$— $6.7 
Sales Return ReserveBalance at
Beginning of
Year
Provisions for Returns / Stock Rotation
Returns / Stock RotationBalance at
End of
Year
2023$43.0 $93.5 $(95.5)$41.0 
2022$31.4 $111.9 $(100.3)$43.0 
2021$28.4 $57.6 $(54.6)$31.4 
Excess and Obsolete Inventory Reserve
Balance at
Beginning of
Year
Provisions
Disposals
Balance at
End of
Year
2023$211.7 $127.2 $(19.0)$319.9 
2022$192.2 $29.8 $(10.3)$211.7 
2021$187.6 $9.9 $(5.3)$192.2 

Contract Manufacturer Liabilities
Balance at
Beginning of
Year
Provisions
Disposals
Balance at
End of
Year
2023$21.5 $30.4 $(15.9)$36.0 
2022$19.7 $7.5 $(5.7)$21.5 
2021$15.2 $8.2 $(3.7)$19.7 

All other schedules have been omitted as the required information is not applicable or the information is presented in the Consolidated Financial Statements or notes thereto under Item 8 herein.