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Pension Plans - Summary of Fair Value by Asset Category and Within Fair Value Hierarchy (Detail) - USD ($) $ in Millions	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 1,305.0	$ 1,110.8	$ 1,049.2
Domestic Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,122.7	957.1
Domestic Pension Plans [Member] | Investments Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	520.6	441.3
Domestic Pension Plans [Member] | Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20.6	20.4
Domestic Pension Plans [Member] | Domestic [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	73.4	66.0
Domestic Pension Plans [Member] | Foreign [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	100.1	74.7
Domestic Pension Plans [Member] | Commingled funds - domestic [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	225.0	191.3
Domestic Pension Plans [Member] | Commingled funds - domestic [Member] | Investments Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	225.0	191.3
Domestic Pension Plans [Member] | Commingled funds - foreign [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	148.8	117.7
Domestic Pension Plans [Member] | Commingled funds - foreign [Member] | Investments Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	148.8	117.7
Domestic Pension Plans [Member] | Private Equity Partnerships [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27.5	34.2
Domestic Pension Plans [Member] | Private Equity Partnerships [Member] | Investments Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27.5	34.2
Domestic Pension Plans [Member] | Government [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	155.0	140.1
Domestic Pension Plans [Member] | Corporate bond [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	253.0	214.6
Domestic Pension Plans [Member] | Real estate and other real assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13.2	10.4
Domestic Pension Plans [Member] | Real estate and other real assets [Member] | Investments Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13.2	10.4
Domestic Pension Plans [Member] | Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	106.1	87.7
Domestic Pension Plans [Member] | Hedge Funds [Member] | Investments Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	106.1	87.7
Foreign Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	182.3	153.7
Foreign Pension Plans [Member] | Investments Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	130.3	131.7
Foreign Pension Plans [Member] | Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.7	0.7
Foreign Pension Plans [Member] | Government [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8.8
Foreign Pension Plans [Member] | Corporate bond [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18.3
Foreign Pension Plans [Member] | Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	16.1	14.3
Foreign Pension Plans [Member] | Hedge Funds [Member] | Investments Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	16.1	14.3
Foreign Pension Plans [Member] | Commingled funds - multi-strategy [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	114.2	117.4
Foreign Pension Plans [Member] | Commingled funds - multi-strategy [Member] | Investments Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	114.2	117.4
Foreign Pension Plans [Member] | Insurance contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	24.2	21.3
Quoted Prices For Identical Assets (Level 1) [Member] | Domestic Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	346.9	300.3
Quoted Prices For Identical Assets (Level 1) [Member] | Domestic Pension Plans [Member] | Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20.6	20.4
Quoted Prices For Identical Assets (Level 1) [Member] | Domestic Pension Plans [Member] | Domestic [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	73.4	66.0
Quoted Prices For Identical Assets (Level 1) [Member] | Domestic Pension Plans [Member] | Foreign [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	100.1	74.7
Quoted Prices For Identical Assets (Level 1) [Member] | Domestic Pension Plans [Member] | Government [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	152.8	139.2
Quoted Prices For Identical Assets (Level 1) [Member] | Foreign Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9.5	0.7
Quoted Prices For Identical Assets (Level 1) [Member] | Foreign Pension Plans [Member] | Cash and cash equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0.7	0.7
Quoted Prices For Identical Assets (Level 1) [Member] | Foreign Pension Plans [Member] | Government [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8.8
Significant Other Observable Inputs (Level 2) [Member] | Domestic Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	255.2	215.5
Significant Other Observable Inputs (Level 2) [Member] | Domestic Pension Plans [Member] | Government [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2.2	0.9
Significant Other Observable Inputs (Level 2) [Member] | Domestic Pension Plans [Member] | Corporate bond [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	253.0	214.6
Significant Other Observable Inputs (Level 2) [Member] | Foreign Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	42.5	21.3
Significant Other Observable Inputs (Level 2) [Member] | Foreign Pension Plans [Member] | Corporate bond [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18.3
Significant Other Observable Inputs (Level 2) [Member] | Foreign Pension Plans [Member] | Insurance contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 24.2	$ 21.3

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Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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