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Other Financial Information
 12 Months Ended
Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Other Financial Information OTHER FINANCIAL INFORMATION
Items reported in earnings include the following:
Year Ended December 31,
202120202019
Research and development expense$266.4 $228.6 $229.4 
Depreciation expense69.1 60.3 57.1 
Rent expense76.6 78.6 81.4 
Advertising expense26.0 28.3 30.3 
Items reported in accrued expenses and other liabilities include the following:
December 31, 2021December 31, 2020
Deferred revenue$238.9 $199.6 
Accrued payroll and other employee compensation125.8 138.5 
Litigation reserve (see Note 17)
— 96.6 
Restructuring (see Note 4)
34.0 69.3 
Operating lease liabilities (see Note 7)
42.1 42.3 
Contract liabilities 52.1 36.1 
Product warranty (see Note 1)
30.0 36.5 
Tax Receivable Agreement (see Note 12)
100.0 — 
Other 330.5 282.9 
Total$953.4 $901.8