Benefit Plans - Expected Weighted Average Long-Term Rate of Return (Detail)	12 Months Ended
Jan. 01, 2017	Jan. 03, 2016
Defined Benefit Plan Disclosure [Line Items]
Target Allocation 2017	100.00%
Percentage of Plan Assets at Fiscal Year-End	100.00%	100.00%
Weighted Average Expected Long-Term Rate of Return - 2016	6.50%
U.S. Large Capitalization Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation 2017	40.00%
Percentage of Plan Assets at Fiscal Year-End	41.00%	40.00%
Weighted Average Expected Long-Term Rate of Return - 2016	3.30%
U.S. Small/Mid-Capitalization Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation 2017	5.00%
Percentage of Plan Assets at Fiscal Year-End	5.00%	5.00%
Weighted Average Expected Long-Term Rate of Return - 2016	0.40%
International Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation 2017	15.00%
Percentage of Plan Assets at Fiscal Year-End	15.00%	15.00%
Weighted Average Expected Long-Term Rate of Return - 2016	1.30%
Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation 2017	40.00%
Percentage of Plan Assets at Fiscal Year-End	39.00%	40.00%
Weighted Average Expected Long-Term Rate of Return - 2016	1.50%

An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Expected Long-Term Rate of Return on Plan Assets
-URI http://asc.fasb.org/extlink&oid=6512046

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)(3)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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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

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- Definition

Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

+ 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)
-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)(1)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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