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Product Warranty (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Warranty reserve activity:          
Balance at beginning of period $ 384.6 $ 361.3 $ 392.8 $ 360.9  
Accruals for warranties issued during the period 57.6 48.0 113.9 99.1  
Settlements made (in cash or in kind) during the period (38.2) (40.2) (87.6) (87.6)  
Foreign currency translation 5.0 2.8 (10.1) (0.5)  
Balance at end of period 409.0 $ 371.9 $ 409.0 $ 371.9  
Product warranty period, minimum, years     1 year    
Product warranty period, maximum, years     4 years    
Product warranty accrual, current 334.3   $ 334.3   $ 331.9
Product warranty accrual, noncurrent $ 74.7   $ 74.7   $ 60.9