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Contingent Liabilities and Other Matters - Noncontrolling Interest in South African Subsidiary (Details)
R in Millions, $ in Millions
3 Months Ended 12 Months Ended
Oct. 16, 2019
ZAR (R)
Oct. 16, 2019
USD ($)
Dec. 31, 2019
USD ($)
Sep. 28, 2019
USD ($)
Jun. 29, 2019
USD ($)
Mar. 30, 2019
USD ($)
Dec. 31, 2018
USD ($)
Sep. 29, 2018
USD ($)
Jun. 30, 2018
USD ($)
Mar. 31, 2018
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2019
ZAR (R)
Dec. 31, 2019
USD ($)
Jul. 06, 2016
ZAR (R)
Loss Contingencies [Line Items]                                
Adjustment related to redeemable noncontrolling interest | $     $ (5.6) $ 0.0 $ 0.0 $ 0.0 $ 0.0 $ 0.0 $ 0.0 $ 0.0 $ (5.6) $ 0.0 $ 0.0      
Subsidiary | BEE Partner | South Africa                                
Loss Contingencies [Line Items]                                
Amount due from BEE Partner under promissory note | R                               R 30.3
Loss on litigation settlement R 27.0 $ 1.8                            
Tax benefit from settlement | $   3.8                            
Subsidiary | BEE Partner | Put Option | South Africa                                
Loss Contingencies [Line Items]                                
Amount entitled for Put Option exercise | R                               R 287.3
Net redemption value                           R 257.0 $ 17.7  
Litigation settlement awarded to other party R 230.0 $ 15.6                            
DBT Technologies | Subsidiary | BEE Partner | Put Option | South Africa                                
Loss Contingencies [Line Items]                                
Noncontrolling interest percentage                           25.10% 25.10%