Accumulated Other Comprehensive Income (Loss) - Reclassifications Out of Accumulated OCI (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of net unrecognized losses and prior service credits	$ (6.7)	$ (8.3)	$ (13.2)	$ (15.1)
Interest expense	13.0	12.9	25.7	26.0
Income tax expense	67.3	62.2	129.9	119.8
Amounts reclassified from Accumulated OCI, Net of tax	(4.0)	(5.2)	(7.9)	(9.4)
Reclassification out of AOCI [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from Accumulated OCI, Net of tax	(4.0)	(5.2)	(7.9)	(9.4)
Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from Accumulated OCI, Net of tax	0.4	0.1	0.7	0.2
Cash Flow Hedges [Member] | Reclassification out of AOCI [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from Accumulated OCI, Net of tax	0.4	0.1	0.7	0.2
Defined Benefit Pension and Postretirement Plans [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from Accumulated OCI, Net of tax	(4.4)	(5.3)	(8.6)	(9.6)
Defined Benefit Pension and Postretirement Plans [Member] | Reclassification out of AOCI [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of net unrecognized losses and prior service credits	(6.7)	(8.3)	(13.2)	(15.1)
Income tax expense	2.3	3.0	4.6	5.5
Amounts reclassified from Accumulated OCI, Net of tax	(4.4)	(5.3)	(8.6)	(9.6)
Treasury Locks [Member] | Cash Flow Hedges [Member] | Reclassification out of AOCI [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ 0.4	$ 0.1	$ 0.7	$ 0.2