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Accumulated Other Comprehensive Income (Loss) - Reclassifications Out of Accumulated OCI (Detail) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 28, 2019
Sep. 28, 2019
Jun. 29, 2019
Mar. 30, 2019
Dec. 29, 2018
Sep. 29, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 28, 2019
Dec. 29, 2018
Dec. 30, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Interest expense                 $ (49.0) $ (50.4) $ (52.4)
Income tax expense                 (211.8) (214.4) (250.9)
Amortization of net unrecognized losses and prior service credits                 8.8 4.2 (7.8)
Net earnings $ 175.0 $ 169.2 $ 184.9 $ 182.1 $ 179.3 $ 167.4 $ 182.7 $ 166.8 711.2 696.2 $ 572.2
Reclassification out of AOCI                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Net earnings                 (16.2) (22.0)  
Cash Flow Hedges | Reclassification out of AOCI                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Interest expense                 1.5 1.5  
Income tax expense                 0.0 0.0  
Net earnings                 1.5 1.5  
Defined Benefit Pension and Postretirement Plans | Reclassification out of AOCI                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                      
Income tax expense                 5.8 7.6  
Amortization of net unrecognized losses and prior service credits                 (23.5) (31.1)  
Net earnings                 $ (17.7) $ (23.5)