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Effect of New Accounting Pronouncements - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Jan. 01, 2018
Jan. 01, 2016
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Cumulative effect on retained earnings   $ 125.3        
Corporate income tax rate     21.00% 21.00% 35.00%  
Benefit for income taxes     $ (89.7) $ (196.5) $ (157.1)  
Operating lease right of use assets     393.5     $ 379.6
Operating lease liabilities     427.3     420.3
Net rent related asset and liabilities           38.3
Cumulative effect of adoption of new accounting standards     (2.4)     2.4
Accumulated Other Comprehensive Earnings (Loss) [Member]            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Cumulative effect of adoption of new accounting standards     $ (0.2)     $ 0.2
Accounting Standards Update 2018-02 [Member]            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Cumulative effect on retained earnings $ 6.6          
Accounting Standards Update 2018-05 [Member]            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Benefit for income taxes       $ 5.8