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Retirement Plans - Additional Information (Detail) $ in Millions | 12 Months Ended
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Dec. 30, 2017 USD ($) | Dec. 31, 2016 USD ($) | Jan. 02, 2016 USD ($)
Schedule Of Other Postretirement Benefits [Line Items] |  |  |
Deferred compensation agreement, minimum | 15 years |  |
Deferred compensation agreement, maximum | 18 years |  |
Cash surrender value of life insurance | $ 60.7 | $ 56.6 |
Defined contribution plan cost recognized | 4.2 | 4.0 | $ 4.6
Defined contribution plan at foreign subsidiary | 1.0 | 1.1 | $ 1.5
Deferred recognized compensation liability | 1.1 | 1.1 |
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax | 42.6 | 45.3 |
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Gains (Losses), after Tax | (28.6) | (30.4) |
Accumulated benefit obligations for all defined benefit pension plans and the SERP | 422.0 | 396.3 |
Actuarial loss included in accumulated other comprehensive income (loss) | $ 3.3 |  |
Amortization of Unrecognized net actuarial losses exceeding certain corridors period | 5 years |  |
Equity securities [Member] |  |  |
Schedule Of Other Postretirement Benefits [Line Items] |  |  |
Target investment allocation | 58.00% |  |
Fixed income securities [Member] |  |  |
Schedule Of Other Postretirement Benefits [Line Items] |  |  |
Target investment allocation | 37.00% |  |
Real Estate Investment [Member] |  |  |
Schedule Of Other Postretirement Benefits [Line Items] |  |  |
Target investment allocation | 5.00% |  |
Pension [Member] |  |  |
Schedule Of Other Postretirement Benefits [Line Items] |  |  |
Number Of Retirement Plans | 3 |  |
Expected contributions to defined benefit plans | $ 1.7 |  |
SERP [Member] |  |  |
Schedule Of Other Postretirement Benefits [Line Items] |  |  |
Cash surrender value of life insurance | 54.0 | $ 50.1 |
Expected contributions to defined benefit plans | $ 3.7 |  |
Defined Contribution Plan [Member] |  |  |
Schedule Of Other Postretirement Benefits [Line Items] |  |  |
Number Of Retirement Plans | 2 |  |

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- Definition After tax net amount of gain (loss) that are not yet recognized as a component of net periodic benefit cost, and that are recognized as increases (decreases) in other comprehensive income as they arise. + References No definition available. + Details
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- Definition The pretax net amount of gains and losses that are not yet recognized as a component of net periodic benefit cost, and that are recognized as increases or decreases in other comprehensive income as they arise. Gains and losses are due to changes in the value of either the benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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- Definition Target allocation of investments of this type to total plan assets presented on a weighted average basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(i) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2446-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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- Definition Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. + 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 (g) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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