EMPLOYEE BENEFITS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Amounts recognized in the statement of financial position consist of:
Noncurrent liability	$ (574,024)	$ (394,209)
Pension plan
EMPLOYEE BENEFITS
Employer contribution	33,482	15,889
Change in Benefit Obligation
Benefit obligation, beginning of year	1,849,321	2,073,218
Service cost	8,030	5,545	5,540
Interest cost	91,004	84,596	91,898
Actuarial (gain)/loss	213,176	(214,353)
Gross benefits paid	(101,441)	(94,253)
Administrative expenses	(8,183)	(5,432)
Benefit obligation, end of year	2,051,907	1,849,321	2,073,218
Changes in the fair value of the plan's Level 3 investment assets
Fair value of plan assets, beginning of year	1,432,695	1,358,877
Actual return on plan assets	122,133	157,614
Employer contribution	33,482	15,889
Gross benefits paid	(101,441)	(94,253)
Administrative expenses	(8,183)	(5,432)
Fair value of plan assets, end of year	1,478,686	1,432,695	1,358,877
Funded Status
Fair value of plan assets	1,478,686	1,432,695	1,358,877
Benefit obligations	(2,051,907)	(1,849,321)	(2,073,218)
Funded status and amount recognized, end of year	(573,221)	(416,626)
Amounts recognized in the statement of financial position consist of:
Current liability	(8,529)	(33,418)
Noncurrent liability	(564,692)	(383,208)
Amounts recognized in the statement of financial position	(573,221)	(416,626)
Amounts recognized in accumulated other comprehensive income consist of:
Net actuarial loss/(gain)	701,408	518,914
Prior service cost/(credit)		12
Amounts recognized in accumulated other comprehensive income	701,408	518,926
Supplemental retirement plans
EMPLOYEE BENEFITS
Employer contribution	8,500	8,300	8,200
Changes in the fair value of the plan's Level 3 investment assets
Employer contribution	8,500	8,300	8,200
Post-retirement plans
EMPLOYEE BENEFITS
Employer contribution	1,344	2,703
Change in Benefit Obligation
Benefit obligation, beginning of year	12,586	15,932
Interest cost	514	497
Plan participants' contributions	267	586
Actuarial (gain)/loss	467	(754)
Gross benefits paid	(1,611)	(3,289)
Plan amendment	(1,621)	(386)
Benefit obligation, end of year	10,602	12,586
Changes in the fair value of the plan's Level 3 investment assets
Employer contribution	1,344	2,703
Plan participants' contributions	267	586
Gross benefits paid	(1,611)	(3,289)
Funded Status
Benefit obligations	(10,602)	(12,586)
Funded status and amount recognized, end of year	(10,602)	(12,586)
Amounts recognized in the statement of financial position consist of:
Current liability	(1,270)	(1,585)
Noncurrent liability	(9,332)	(11,001)
Amounts recognized in the statement of financial position	(10,602)	(12,586)
Amounts recognized in accumulated other comprehensive income consist of:
Net actuarial loss/(gain)	(9,385)	(11,041)
Prior service cost/(credit)	(12,768)	(13,436)
Amounts recognized in accumulated other comprehensive income	$ (22,153)	$ (24,477)

The pretax total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

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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.

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Amount related to the pretax cost of benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation, which has not yet been recognized as components of net periodic benefit cost.

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The difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable.

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Amount of gain (loss) related to change in benefit obligation resulting from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover, salary, and temporary deviation from the substantive plan.

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Amount of plan administration expenses deducted from total plan assets.

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The aggregate net amount recognized in the balance sheet associated with the defined benefit plan(s). Will normally be the same as the Defined Benefit Plan, Funded Status of Plan, Total.

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1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

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The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets.

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The increase in the fair value of plan assets from contributions made by the employer.

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.

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The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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The amount of increase or decrease due to a change in the terms of an existing plan or the initiation of a new plan. A plan amendment may increase or decrease benefits, including those attributed to years of service already rendered.

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