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Shareholders' Equity - Schedule of Dividend Paid and Proposed (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Nov. 06, 2019
Aug. 07, 2019
Aug. 01, 2019
May 01, 2019
Feb. 06, 2019
Nov. 07, 2018
Aug. 01, 2018
May 02, 2018
Feb. 07, 2018
Sep. 29, 2019
Sep. 30, 2018
Sep. 29, 2019
Sep. 30, 2018
Dividends Payable [Line Items]                          
Dividends paid   $ 3.4 $ 3.4 $ 3.4 $ 3.4 $ 3.3 $ 3.3 $ 3.3 $ 3.4 $ 3.4 $ 3.3 $ 10.2 $ 10.0
Dividends paid (in USD per share)   $ 0.125   $ 0.125 $ 0.125 $ 0.125 $ 0.125 $ 0.125 $ 0.125        
Subsequent Event                          
Dividends Payable [Line Items]                          
Dividends paid $ 3.4                        
Dividends paid (in USD per share) $ 0.125