Publix Super Markets (PUSH) 10-K 1 Mar 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 29, 2018	Feb. 05, 2019	Jun. 29, 2018
Document Documentand Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 29, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Trading Symbol	ck0000081061
Entity Registrant Name	PUBLIX SUPER MARKETS INC
Entity Central Index Key	81,061
Current Fiscal Year End Date	--12-29
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		713,636,000
Entity Public Float			$ 16,703,262,000

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 29, 2018	Dec. 30, 2017
Current assets:
Cash and cash equivalents	$ 599,264	$ 579,925
Short-term investments	560,992	915,579
Trade receivables	682,981	671,414
Inventories	1,848,735	1,876,519
Prepaid expenses	122,224	41,484
Total current assets	3,814,196	4,084,921
Long-term investments	6,016,438	5,517,732
Other noncurrent assets	515,265	583,149
Property, plant and equipment:
Land	1,850,718	1,621,230
Buildings and improvements	5,535,538	4,723,213
Furniture, fixtures and equipment	5,114,698	4,844,804
Leasehold improvements	1,564,243	1,741,703
Construction in progress	109,367	154,542
Property, plant and equipment	14,174,564	13,085,492
Accumulated depreciation	(5,537,947)	(5,087,788)
Net property, plant and equipment	8,636,617	7,997,704
Total assets	18,982,516	18,183,506
Current liabilities:
Accounts payable	1,864,604	1,754,706
Accrued expenses:
Contributions to retirement plans	540,760	517,493
Self-insurance reserves	145,241	137,100
Salaries and wages	132,916	124,423
Other	321,080	329,420
Current portion of long-term debt	4,954	37,873
Federal and state income taxes	0	241,299
Total current liabilities	3,009,555	3,142,314
Deferred income taxes	420,757	360,952
Self-insurance reserves	222,419	218,598
Accrued postretirement benefit cost	105,308	113,461
Long-term debt	162,711	155,201
Other noncurrent liabilities	67,102	84,361
Total liabilities	3,987,852	4,074,887
Common stock related to Employee Stock Ownership Plan (ESOP)	3,134,999	3,053,138
Stockholders’ equity:
Common stock of $1 par value. Authorized 1,000,000 shares; issued and outstanding 715,445 shares in 2018 and 733,440 shares in 2017	715,445	733,440
Additional paid-in capital	3,458,004	3,139,647
Retained earnings	10,840,654	10,044,564
Accumulated other comprehensive (losses) earnings	(55,762)	152,636
Common stock related to ESOP	(3,134,999)	(3,053,138)
Total stockholders’ equity	11,823,342	11,017,149
Noncontrolling interests	36,323	38,332
Total equity	14,994,664	14,108,619
Commitments and contingencies	0	0
Total liabilities and stockholders' equity	$ 18,982,516	$ 18,183,506

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 29, 2018	Dec. 30, 2017
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	715,445,000	733,440,000
Common stock, shares outstanding	715,445,000	733,440,000

Consolidated Statements of Earn

Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Revenues:
Sales	$ 36,093,907	$ 34,558,286	$ 33,999,921
Other operating income	301,811	278,552	274,188
Total revenues	36,395,718	34,836,838	34,274,109
Costs and expenses:
Cost of merchandise sold	26,311,391	25,129,717	24,734,305
Operating and administrative expenses	7,339,924	6,974,297	6,788,153
Total costs and expenses	33,651,315	32,104,014	31,522,458
Operating profit	2,744,403	2,732,824	2,751,651
Investment income	56,699	226,626	133,067
Other nonoperating income, net	119,866	68,056	55,658
Earnings before income tax expense	2,920,968	3,027,506	2,940,376
Income tax expense	539,801	735,612	914,688
Net earnings	$ 2,381,167	$ 2,291,894	$ 2,025,688
Weighted average shares outstanding	726,407	753,483	769,267
Earnings per share	$ 3.28	$ 3.04	$ 2.63

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Earnings - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net earnings	$ 406,980	$ 677,744	$ 616,172	$ 680,271	$ 766,624	$ 474,927	$ 495,072	$ 555,271	$ 2,381,167	$ 2,291,894	$ 2,025,688
Other comprehensive earnings:
Unrealized (loss) on debt securities net of income taxes of $(6,521) in 2018. Unrealized gain on debt and equity securities net of income taxes of $110,818 and $11,093 in 2017 and 2016, respectively.									(19,126)	175,978	17,615
Reclassification adjustment for net realized loss on debt securities net of income taxes of $118 in 2018. Reclassification adjustment for net realized (gain) on debt and equity securities net of income taxes of $(42,088) and $(12,464) in 2017 and 2016, respectively.									346	(66,836)	(19,792)
Adjustment to postretirement benefit obligation net of income taxes of $2,963, $(4,406) and $(418) in 2018, 2017 and 2016, respectively.									8,692	(6,997)	(664)
Comprehensive earnings									$ 2,371,079	$ 2,394,039	$ 2,022,847

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Earnings (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Unrealized (loss) on debt securities net of income taxes in 2018. Unrealized gain on debt and equity securities net of income taxes in 2017 and 2016	$ (6,521)	$ 110,818	$ 11,093
Reclassification adjustment for net realized loss on debt securities net of income taxes in 2018. Reclassification adjustment for net realized (gain) on debt and equity securities net of income taxes in 2017 and 2016.	118	(42,088)	(12,464)
Adjustment to postretirement benefit obligation net of income taxes in 2018, 2017 and 2016.	$ 2,963	$ (4,406)	$ (418)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Cash flows from operating activities:
Cash received from customers	$ 36,296,870	$ 34,729,287	$ 34,088,337
Cash paid to employees and suppliers	(32,177,582)	(30,821,593)	(30,291,186)
Income taxes paid	(563,983)	(478,457)	(683,464)
Self-insured claims paid	(395,457)	(344,905)	(338,010)
Dividends and interest received	192,528	241,773	246,202
Other operating cash receipts	297,098	273,435	268,347
Other operating cash payments	(17,548)	(19,259)	(37,271)
Net cash provided by operating activities	3,631,926	3,580,281	3,252,955
Cash flows from investing activities:
Payment for capital expenditures	(1,350,089)	(1,429,059)	(1,443,827)
Proceeds from sale of property, plant and equipment	43,834	6,300	6,268
Payment for investments	(2,778,691)	(3,069,417)	(2,526,973)
Proceeds from sale and maturity of investments	2,342,162	3,256,077	2,158,434
Net cash used in investing activities	(1,742,784)	(1,236,099)	(1,806,098)
Cash flows from financing activities:
Payment for acquisition of common stock	(1,405,872)	(1,751,864)	(960,262)
Proceeds from sale of common stock	307,933	283,222	330,040
Dividends paid	(734,510)	(689,660)	(667,902)
Repayment of long-term debt	(43,593)	(75,325)	(49,828)
Other, net	6,239	31,051	(12,762)
Net cash used in financing activities	(1,869,803)	(2,202,576)	(1,360,714)
Net increase in cash and cash equivalents	19,339	141,606	86,143
Cash and cash equivalents at beginning of year	579,925	438,319	352,176
Cash and cash equivalents at end of year	599,264	579,925	438,319
Reconciliation of net earnings to net cash provided by operating activities:
Net earnings	2,381,167	2,291,894	2,025,688
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	677,154	664,009	624,203
Increase (decrease) in last-in, first out (LIFO) reserve	24,170	23,028	(4,643)
Retirement contributions paid or payable in common stock	373,350	353,659	365,936
Deferred income taxes	63,245	(99,856)	24,357
(Gain) loss on disposal and impairment of property, plant and equipment	(13,185)	15,231	11,035
Loss (gain) on investments	73,254	(108,924)	(32,256)
Net amortization of investments	63,654	109,240	141,869
Change in operating assets and liabilities providing (requiring) cash:
Trade receivables	(10,790)	43,870	8,306
Inventories	3,614	(177,155)	22,764
Prepaid expenses and other noncurrent assets	199,930	82,089	(14,307)
Accounts payable and accrued expenses	112,383	151,186	(74,917)
Self-insurance reserves	11,962	19	5,340
Federal and state income taxes	(313,989)	241,686	159,426
Other noncurrent liabilities	(13,993)	(9,695)	(9,846)
Total adjustments	1,250,759	1,288,387	1,227,267
Net cash provided by operating activities	$ 3,631,926	$ 3,580,281	$ 3,252,955

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Common Stock (Acquired from) Sold to Stock- holders	Accumulated Other Comprehensive Earnings (Losses)	Common Stock Related to ESOP
Beginning Balance at Dec. 26, 2015	$ 9,440,453	$ 770,175	$ 2,556,391	$ 9,041,497	$ 0	$ 26,268	$ (2,953,878)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive earnings	2,022,847			2,025,688		(2,841)
Dividends per share	(667,902)			(667,902)
Contribution of shares to retirement plans	354,214	5,216	239,436		109,562
Acquisition of shares from stockholders	(960,262)				(960,262)
Sale of shares to stockholders	330,040	1,283	54,120		274,637
Retirement of shares	0	(13,476)		(562,587)	576,063
Change for ESOP related shares	(114,219)						(114,219)
Ending Balance at Dec. 31, 2016	10,405,171	763,198	2,849,947	9,836,696	0	23,427	(3,068,097)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive earnings	2,394,039			2,291,894		102,145
Dividends per share	(689,660)			(689,660)
Contribution of shares to retirement plans	361,282	6,540	262,684		92,058
Acquisition of shares from stockholders	(1,751,864)				(1,751,864)
Sale of shares to stockholders	283,222	677	27,016		255,529
Retirement of shares	0	(36,975)		(1,367,302)	1,404,277
Change for ESOP related shares	14,959						14,959
Remeasurement of deferred income taxes reclassified to retained earnings				(27,064)		27,064
Ending Balance at Dec. 30, 2017	11,017,149	733,440	3,139,647	10,044,564	0	152,636	(3,053,138)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive earnings	2,371,079			2,381,167		(10,088)
Dividends per share	(734,510)			(734,510)
Contribution of shares to retirement plans	349,424	6,221	261,423		81,780
Acquisition of shares from stockholders	(1,405,872)				(1,405,872)
Sale of shares to stockholders	307,933	1,380	56,934		249,619
Retirement of shares	0	(25,596)		(1,048,877)	1,074,473
Change for ESOP related shares	(81,861)						(81,861)
Cumulative effect of net unrealized gain on equity securities reclassified to retained earnings				198,310		(198,310)
Ending Balance at Dec. 29, 2018	$ 11,823,342	$ 715,445	$ 3,458,004	$ 10,840,654	$ 0	$ (55,762)	$ (3,134,999)

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares shares in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Statement of Stockholders' Equity [Abstract]
Common Stock, Dividends, Per Share, Cash Paid	$ 1.01	$ 0.9125	$ 0.8675
Contribution of shares to retirement plans	8,440	8,833	7,837
Acquisition of shares from stockholders	33,770	45,952	22,500
Sale of shares to stockholders	7,335	7,361	7,686
Retirement of shares	25,596	36,975	13,476

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 29, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	(1) Summary of Significant Accounting Policies (a) Business Publix Super Markets, Inc. and its wholly owned subsidiaries (the Company) are in the business of operating retail food supermarkets in Florida, Georgia, Alabama, South Carolina, Tennessee, North Carolina and Virginia. The Company was founded in 1930 and later merged into another corporation that was originally incorporated in 1921. The Company has no other significant lines of business or industry segments. See percentage of consolidated sales by merchandise category on page 1. (b) Principles of Consolidation The consolidated financial statements include the accounts of the Company, its wholly owned subsidiaries and certain joint ventures in which the Company has a controlling financial interest. All significant intercompany balances and transactions are eliminated in consolidation. (c) Fiscal Year The Company’s fiscal year ends on the last Saturday in December. Fiscal years 2018 and 2017 include 52 weeks and fiscal year 2016 includes 53 weeks. (d) Cash Equivalents The Company considers all liquid investments with maturities of three months or less to be cash equivalents. (e) Trade Receivables Trade receivables primarily include amounts due from vendor allowances, debit and credit card sales and third party insurance pharmacy billings. (f) Inventories Inventories are valued at the lower of cost or market. The dollar value last-in, first-out (LIFO) method was used to determine the cost for 85% of inventories as of December 29, 2018 and December 30, 2017 . Under this method, inventory is stated at cost, which is determined by applying a cost-to-retail ratio to each similar merchandise category’s ending retail value. The cost of the remaining inventories was determined using the first-in, first-out (FIFO) method. The FIFO cost of inventory approximates replacement or current cost. The FIFO method is used to value manufactured, seasonal, certain perishable and other miscellaneous inventory items because of fluctuating costs and inconsistent product availability. The Company also reduces inventory for estimated losses related to shrink. If all inventories were valued using the FIFO method, inventories and current assets would have been higher than reported by $489,058,000 and $464,888,000 as of December 29, 2018 and December 30, 2017 , respectively. (g) Investments Debt securities are classified as available-for-sale and measured at fair value. The Company evaluates whether debt securities are other-than-temporarily impaired (OTTI) based on criteria that include the extent to which the cost (cost of the debt security adjusted for amortization of premium or accretion of discount) exceeds market value, the duration of the market value decline, the credit rating of the issuer or security, the failure of the issuer to make scheduled principal or interest payments and the financial health and prospects of the issuer or security. Declines in the fair value of debt securities determined to be OTTI are recognized in earnings and reported as OTTI losses. Debt securities with unrealized losses are considered OTTI if the Company intends to sell the debt security or if the Company will be required to sell the debt security prior to any anticipated recovery. If the Company determines that a debt security is OTTI under these circumstances, the impairment recognized in earnings is measured as the difference between the cost and the fair value. A debt security is also determined to be OTTI if the Company does not expect to recover the cost of the debt security. However, in this circumstance, if the Company does not intend to sell the debt security and will not be required to sell the debt security, the impairment recognized in earnings equals the estimated credit loss as measured by the difference between the present value of expected cash flows and the cost of the debt security. Expected cash flows are discounted using the debt security’s effective interest rate. Changes in the fair value of debt securities determined to be temporary are reported in other comprehensive earnings net of income taxes and included as a component of stockholders’ equity. In 2018, the Company adopted the Accounting Standards Update (ASU) requiring equity securities be measured at fair value with net unrealized gains and losses from changes in the fair value recognized in earnings (fair value adjustment). The fair value adjustment also includes the cumulative effect of the ASU as of December 31, 2017 reclassified from accumulated other comprehensive earnings to retained earnings. Prior to adoption of the ASU, changes in the fair value of equity securities were accounted for similar to changes in the fair value of debt securities. Equity securities were classified as available-for-sale and measured at fair value. Declines in the fair value of equity securities determined to be OTTI were recognized in earnings and reported as OTTI losses. An equity security was determined to be OTTI if the Company did not expect to recover the cost of the equity security. Changes in the fair value of equity securities determined to be temporary were reported in other comprehensive earnings net of income taxes and included as a component of stockholders’ equity. Interest and dividend income, amortization of premiums, accretion of discounts and realized gains and losses on the sale of debt and equity securities are included in investment income. Interest income is accrued as earned. Dividend income is recognized as income on the ex-dividend date. The cost of debt and equity securities sold is based on the FIFO method. With the adoption of the ASU, the fair value adjustment on equity securities held as of December 29, 2018 is also included in investment income. (h) Property, Plant and Equipment and Depreciation Assets are recorded at cost and depreciated using the straight-line method over their estimated useful lives or the terms of the related leases, if shorter, as follows: buildings and improvements (10–40 years); furniture, fixtures and equipment (3–20 years); and leasehold improvements (10–20 years). Maintenance and repairs are expensed as incurred. Expenditures for renewals and betterments are capitalized. The gain or loss realized on disposed assets or assets to be disposed of is recorded in earnings. (i) Long-Lived Assets The Company reviews its long-lived assets for impairment whenever events or changes in circumstances indicate that the net book value of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the net book value of an asset to the future net undiscounted cash flows expected to be generated by the asset. An impairment loss is recorded for the excess of the net book value over the fair value of the asset. The fair value is estimated based on expected discounted future cash flows. Assets to be disposed of are reported at the lower of the carrying amount or fair value less cost to sell and are no longer depreciated. Long-lived assets, including buildings and improvements, leasehold improvements, and furniture, fixtures and equipment, are evaluated for impairment at the supermarket level. (j) Self-Insurance The Company is self-insured for health care claims and property, plant and equipment losses. The Company has insurance coverage for losses in excess of self-insurance limits for workers’ compensation, general liability and fleet liability claims. Self-insurance reserves are established for health care, workers’ compensation, general liability and fleet liability claims. These reserves are determined based on actual claims experience and an estimate of claims incurred but not reported including, where necessary, actuarial studies. Actuarial projections of losses for general liability and workers’ compensation claims are discounted. (k) Postretirement Benefit The Company provides a postretirement life insurance benefit for certain salaried and hourly full-time employees who meet the eligibility requirements. Effective January 1, 2002, the Company amended the postretirement life insurance benefit under its Group Life Insurance Plan. To receive the postretirement life insurance benefit after the amendment, an employee must have had at least five years of full-time service and the employee’s age plus years of credited service must have equaled 65 or greater as of October 1, 2001. At retirement, such employees also must be at least age 55 with at least 10 years of full-time service to be eligible to receive the postretirement life insurance benefit. Actuarial projections are used to calculate the year end postretirement benefit obligation, discounted using a yield curve methodology based on high quality bonds with a rating of AA or better. Actuarial losses are amortized from accumulated other comprehensive earnings into net periodic postretirement benefit cost over future years when the accumulation of such losses exceeds 10% of the year end postretirement benefit obligation. (l) Comprehensive Earnings Comprehensive earnings include net earnings and other comprehensive earnings. Other comprehensive earnings include revenues, expenses, gains and losses that have been excluded from net earnings and recorded directly to stockholders’ equity. Included in other comprehensive earnings for the Company are unrealized gains and losses on debt securities in 2018, unrealized gains and losses on debt and equity securities in 2017 and 2016 and adjustments to the postretirement benefit obligation. (m) Revenue Recognition Revenue is recognized at the point of sale for retail sales. Customer returns are immaterial. Vendor coupons that are reimbursed are accounted for as sales. Coupons and other sales incentives offered by the Company that are not reimbursed are recorded as a reduction of sales. The Company records sales net of applicable sales taxes. (n) Other Operating Income Other operating income is recognized on a net revenue basis as earned. Other operating income includes income generated from other activities, primarily lottery commissions, licensee sales commissions, mall gift card commissions, automated teller transaction fees, money transfer fees, vending machine commissions and coupon redemption income. (o) Cost of Merchandise Sold Cost of merchandise sold includes costs of inventory and costs related to in-store production. Cost of merchandise sold also includes inbound freight charges, purchasing and receiving costs, warehousing costs and other costs of the Company’s distribution network. Allowances and credits, including cooperative advertising allowances, received from a vendor in connection with the purchase or promotion of the vendor’s products are recognized as a reduction of cost of merchandise sold as earned. These allowances and credits are recognized as earned in accordance with the underlying agreement with the vendor and completion of the earnings process. Short-term vendor agreements with advance payment provisions are recorded as a current liability and recognized over the appropriate period as earned according to the underlying agreements. Long-term vendor agreements with advance payment provisions are recorded as a noncurrent liability and recognized over the appropriate period as earned according to the underlying agreements. (p) Advertising Costs Advertising costs are expensed as incurred and were $249,123,000 , $251,933,000 and $260,367,000 for 2018 , 2017 and 2016 , respectively. (q) Other Nonoperating Income, net Other nonoperating income, net includes rent received from tenants in owned shopping centers, net of related expenses, and other miscellaneous nonoperating income. (r) Income Taxes Deferred income taxes are established for temporary differences between financial and tax reporting bases and are subsequently adjusted to reflect changes in income tax rates expected to be in effect when the temporary differences reverse. The Company recognizes accrued interest and penalties related to income tax liabilities as a component of income tax expense. The Company invests in certain investment related tax credits that promote affordable housing and renewable energy. These investments generate a return primarily through the realization of federal and state tax credits and other tax benefits. The Company accounts for its affordable housing investments using the proportional amortization method. Under this method, the investment is amortized into income tax expense in proportion to the tax credits received and the investment tax credits are recognized as a reduction of income tax expense. The Company accounts for its renewable energy investments using the deferral method. Under this method, the investment tax credits are recognized as a reduction of the renewable energy investments. (s) Common Stock and Earnings Per Share Earnings per share is calculated by dividing net earnings by the weighted average shares outstanding. Basic and diluted earnings per share are the same because the Company does not have options or other stock compensation programs that impact the calculation of diluted earnings per share. All shares owned by the Employee Stock Ownership Plan (ESOP) are included in the earnings per share calculations. Dividends paid to the ESOP, as well as dividends on all other common stock shares, are reflected as a reduction of retained earnings. All common stock shares, including ESOP and 401(k) Plan shares, receive one vote per share and have the same dividend rights. The voting rights for ESOP shares allocated to participants’ accounts are passed through to the participants. The Trustee of the Company’s common stock in the 401(k) Plan votes the shares held in that plan. (t) Use of Estimates The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Dec. 29, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	(2) Fair Value of Financial Instruments The fair value of certain of the Company’s financial instruments, including cash and cash equivalents, trade receivables and accounts payable, approximates their respective carrying amounts due to their short-term maturity. The fair value of investments is based on market prices using the following measurement categories: Level 1 – Fair value is determined by using quoted prices in active markets for identical investments. Investments included in this category are equity securities (exchange traded funds and individual equity securities) and a restricted investment (mutual fund) held as collateral in 2017, collectively referred to as equity securities. Level 2 – Fair value is determined by using other than quoted prices. By using observable inputs (for example, benchmark yields, interest rates, reported trades and broker dealer quotes), the fair value is determined through processes such as benchmark curves, benchmarking of like securities and matrix pricing of corporate, state and municipal bonds by using pricing of similar bonds based on coupons, ratings and maturities. Investments included in this category are primarily debt securities (tax exempt and taxable bonds), including a restricted investment in taxable bonds held as collateral in 2018. Level 3 – Fair value is determined by using other than observable inputs. Fair value is determined by using the best information available in the circumstances and requires significant management judgment or estimation. No investments are currently included in this category. Following is a summary of fair value measurements for investments as of December 29, 2018 and December 30, 2017 : Fair Value Level 1 Level 2 Level 3 (Amounts are in thousands) December 29, 2018 $ 6,577,430 2,372,931 4,204,499 — December 30, 2017 6,433,311 2,545,320 3,887,991 —

Investments

Investments	12 Months Ended
	Dec. 29, 2018
Investments, Debt and Equity Securities [Abstract]
Investments	(3) Investments (a) Debt Securities Following is a summary of debt securities as of December 29, 2018 and December 30, 2017 : Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (Amounts are in thousands) 2018 Tax exempt bonds $ 1,256,673 184 12,759 1,244,098 Taxable bonds 2,527,468 1,737 55,085 2,474,120 Restricted investment 160,318 520 346 160,492 $ 3,944,459 2,441 68,190 3,878,710 2017 Tax exempt bonds $ 1,811,523 602 16,420 1,795,705 Taxable bonds 2,115,174 695 25,443 2,090,426 $ 3,926,697 1,297 41,863 3,886,131 The Company held a restricted investment as of December 29, 2018 for the benefit of the Company’s insurance carrier related to self-insurance reserves. This investment is held as collateral and not used for self-insured claims payments. The cost and fair value of debt securities by expected maturity as of December 29, 2018 and December 30, 2017 are as follows: 2018 2017 Cost Fair Value Cost Fair Value (Amounts are in thousands) Due in one year or less $ 563,272 560,992 917,576 915,579 Due after one year through five years 2,831,916 2,768,971 2,794,099 2,757,504 Due after five years through ten years 542,488 541,852 205,792 203,533 Due after ten years 6,783 6,895 9,230 9,515 $ 3,944,459 3,878,710 3,926,697 3,886,131 Following is a summary of temporarily impaired debt securities by the time period impaired as of December 29, 2018 and December 30, 2017 : Less Than 12 Months 12 Months or Longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (Amounts are in thousands) 2018 Tax exempt bonds $ 25,150 95 1,182,783 12,664 1,207,933 12,759 Taxable bonds 645,379 5,821 1,464,208 49,264 2,109,587 55,085 Restricted investment 28,687 346 — — 28,687 346 $ 699,216 6,262 2,646,991 61,928 3,346,207 68,190 2017 Tax exempt bonds $ 1,543,151 13,827 136,217 2,593 1,679,368 16,420 Taxable bonds 811,886 4,908 1,153,645 20,535 1,965,531 25,443 $ 2,355,037 18,735 1,289,862 23,128 3,644,899 41,863 There are 400 debt securities contributing to the total unrealized losses of $68,190,000 as of December 29, 2018 . Unrealized losses related to debt securities are primarily due to increases in interest rates impacting the market value of certain bonds. The Company continues to receive scheduled principal and interest payments on these debt securities. (b) Equity Securities Following is a summary of the fair value of equity securities as of December 29, 2018 and December 30, 2017 : 2018 2017 (Amounts are in thousands) Equity securities $ 2,698,720 2,383,095 Restricted investment — 164,085 $ 2,698,720 2,547,180 The Company held a restricted investment as of December 30, 2017 for the benefit of the Company’s insurance carrier related to self-insurance reserves. This investment was held as collateral and not used for self-insured claims payments. (c) Investment Income In the following table, net realized gain on the sale of investments represents the difference between the cost and the proceeds from the sale of debt and equity securities. For 2018 , the net realized gain on the sale of investments excludes the net gain on the sale of equity securities previously recognized through the fair value adjustment, which is presented separately. Following is a summary of investment income for 2018 , 2017 and 2016 : 2018 2017 2016 (Amounts are in thousands) Interest and dividend income $ 129,953 117,702 100,811 Net realized gain on sale of investments 109,547 108,924 32,256 239,500 226,626 133,067 Fair value adjustment, due to net unrealized loss, on equity securities held at end of year (107,466 ) — — Net gain on sale of equity securities previously recognized through fair value adjustment (75,335 ) — — $ 56,699 226,626 133,067

Consolidation of Joint Ventures

Consolidation of Joint Ventures and Long-Term Debt	12 Months Ended
	Dec. 29, 2018
Consolidation Of Joint Ventures And Long Term Debt [Abstract]
Consolidation of Joint Ventures and Long-Term Debt	(4) Consolidation of Joint Ventures and Long-Term Debt From time to time, the Company enters into a joint venture (JV), in the legal form of a limited liability company, with certain real estate developers to partner in the development of a shopping center with the Company as the anchor tenant. The Company consolidates certain of these JVs in which it has a controlling financial interest. The Company is considered to have a controlling financial interest in a JV when it has (1) the power to direct the activities of the JV that most significantly impact the JV’s economic performance and (2) the obligation to absorb losses or the right to receive benefits from the JV that could potentially be significant to such JV. The Company evaluates a JV using specific criteria to determine whether the Company has a controlling financial interest and is the primary beneficiary of the JV. Factors considered in determining whether the Company is the primary beneficiary include risk and reward sharing, experience and financial condition of the other JV members, voting rights, involvement in routine capital and operating decisions and each member’s influence over the JV owned shopping center’s economic performance. Generally, most major JV decision making is shared between all members. In particular, the use and sale of JV assets, business plans and budgets are generally required to be approved by all members. However, the Company, through its anchor tenant operating lease agreement, has the power to direct the activities that most significantly influence the economic performance of the JV owned shopping center. Additionally, through its member equity interest in the JV, the Company will receive a significant portion of the JV’s benefits or is obligated to absorb a significant portion of the JV’s losses. As of December 29, 2018 , the carrying amounts of the assets and liabilities of the consolidated JVs were $144,197,000 and $71,342,000 , respectively. As of December 30, 2017 , the carrying amounts of the assets and liabilities of the consolidated JVs were $144,559,000 and $67,631,000 , respectively. The assets are owned by and the liabilities are obligations of the JVs, not the Company, except for a portion of the long-term debt of certain JVs guaranteed by the Company. The JVs are financed with capital contributions from the members, loans and/or the cash flows generated by the JV owned shopping centers once in operation. Total earnings attributable to noncontrolling interests for 2018 , 2017 and 2016 were immaterial. The Company’s involvement with these JVs does not have a significant effect on the Company’s financial condition, results of operations or cash flows. The Company’s long-term debt results primarily from the consolidation of loans of certain JVs and loans assumed in connection with the acquisition of certain shopping centers with the Company as the anchor tenant. The Company assumed loans totaling $9,936,000 during 2018 . No loans were assumed during 2017 . Maturities of JV loans range from June 2020 through April 2027 and have variable interest rates based on a LIBOR index plus 175 to 250 basis points. Maturities of assumed shopping center loans range from December 2020 through January 2027 and have fixed interest rates ranging from 3.7% to 7.5% . As of December 29, 2018 , the aggregate annual maturities and scheduled payments of long-term debt are as follows: Year (Amounts are in thousands) 2019 $ 4,954 2020 41,792 2021 34,812 2022 25,096 2023 18,693 Thereafter 42,318 $ 167,665

Retirement Plans (Notes)

Retirement Plans (Notes)	12 Months Ended
	Dec. 29, 2018
Retirement Benefits [Abstract]
Retirement Plans	(5) Retirement Plans The Company has a trusteed, noncontributory ESOP for the benefit of eligible employees. The Company recognizes an expense related to the Company’s discretionary contribution to the ESOP that is approved by the Board of Directors each year. ESOP contributions can be made in Company common stock or cash. Compensation expense recorded for contributions to this plan was $337,712,000 , $319,470,000 and $334,422,000 for 2018 , 2017 and 2016 , respectively. Since the Company’s common stock is not traded on an established securities market, the ESOP includes a put option for shares of the Company’s common stock distributed from the ESOP. Shares are distributed from the ESOP primarily to separated vested participants and certain eligible participants who elect to diversify their account balances. Under the Company’s administration of the ESOP’s put option, if the owners of distributed shares desire to sell their shares, the Company is required to purchase the shares at fair value for a specified time period after distribution of the shares from the ESOP. The fair value of distributed shares subject to the put option totaled $288,580,000 and $311,315,000 as of December 29, 2018 and December 30, 2017 , respectively. The cost of the shares held by the ESOP totaled $2,846,419,000 and $2,741,823,000 as of December 29, 2018 and December 30, 2017 , respectively. Due to the Company’s obligation under the put option, the distributed shares subject to the put option and the shares held by the ESOP are classified as temporary equity in the mezzanine section of the consolidated balance sheets and totaled $3,134,999,000 and $3,053,138,000 as of December 29, 2018 and December 30, 2017 , respectively. The fair value of the shares held by the ESOP totaled $8,061,399,000 and $7,252,657,000 as of December 29, 2018 and December 30, 2017 , respectively. The Company has a 401(k) Plan for the benefit of eligible employees. The 401(k) Plan is a voluntary defined contribution plan. Eligible employees may contribute up to 10% of their eligible annual compensation, subject to the maximum contribution limits established by federal law. The Company may make a discretionary annual matching contribution to eligible participants of this plan as determined by the Board of Directors. During 2018 , 2017 and 2016 , the Board of Directors approved a match of 50% of eligible annual contributions up to 3% of eligible annual compensation, not to exceed a maximum match of $750 per employee. The match, which is determined as of the last day of the plan year and paid in the subsequent plan year, is in common stock of the Company. Compensation expense recorded for the Company’s match to the 401(k) Plan was $34,980,000 , $33,636,000 and $30,899,000 for 2018 , 2017 and 2016 , respectively. The Company intends to continue its retirement plans; however, the right to modify, amend, terminate or merge these plans has been reserved. In the event of termination, all amounts contributed under the plans must be paid to the participants or their beneficiaries.

Income Taxes (Notes)

Income Taxes (Notes)	12 Months Ended
	Dec. 29, 2018
Income Tax Disclosure [Abstract]
Income Taxes	(6) Income Taxes On December 22, 2017, the Tax Cuts and Jobs Act of 2017 (Tax Act) was signed into law making significant changes to the Internal Revenue Code. Changes included, among others, a decrease in the federal statutory income tax rate from 35% to 21% beginning in 2018. Total income taxes for 2018 , 2017 and 2016 were allocated as follows: 2018 2017 2016 (Amounts are in thousands) Earnings $ 539,801 735,612 914,688 Other comprehensive (losses) earnings (3,440 ) 64,324 (1,789 ) $ 536,361 799,936 912,899 The provision for income taxes consists of the following: Current Deferred Total (Amounts are in thousands) 2018 Federal $ 413,735 59,377 473,112 State 62,821 3,868 66,689 $ 476,556 63,245 539,801 2017 Federal $ 771,355 (113,620 ) 657,735 State 64,113 13,764 77,877 $ 835,468 (99,856 ) 735,612 2016 Federal $ 820,989 20,697 841,686 State 69,342 3,660 73,002 $ 890,331 24,357 914,688 A reconciliation of the provision for income taxes at the federal statutory income tax rate of 21% for 2018 and 35% for 2017 and 2016 to earnings before income taxes compared to the Company’s actual income tax expense is as follows: 2018 2017 2016 (Amounts are in thousands) Federal tax at statutory income tax rate $ 613,403 1,059,627 1,029,132 State income taxes (net of federal tax benefit) 52,684 50,621 47,451 ESOP dividend (41,175 ) (65,111 ) (65,232 ) Other, net (85,111 ) (85,330 ) (96,663 ) Remeasurement of deferred income taxes — (224,195 ) — $ 539,801 735,612 914,688 The impact of the reduction of the federal statutory income tax rate decreased the Company’s income tax expense for 2017 by $224,195,000 due to the remeasurement of deferred income taxes. The Company had no incomplete or provisional amounts in the remeasurement of deferred income taxes. The tax effects of temporary differences that give rise to significant portions of deferred income taxes as of December 29, 2018 and December 30, 2017 are as follows: 2018 2017 (Amounts are in thousands) Deferred tax liabilities and (assets): Property, plant and equipment $ 581,290 487,026 Inventories 25,989 23,784 Self-insurance reserves (79,467 ) (77,783 ) Retirement plan contributions (41,424 ) (42,547 ) Postretirement benefit cost (28,224 ) (30,226 ) Purchase allowances (11,114 ) (9,967 ) Investments (10,811 ) 30,090 Lease accounting (4,662 ) (8,576 ) Other (10,820 ) (10,849 ) $ 420,757 360,952 The Company expects the results of future operations and the reversal of deferred tax liabilities to generate sufficient taxable income to allow utilization of deferred tax assets; therefore, no valuation allowance has been recorded as of December 29, 2018 and December 30, 2017 . The Company has analyzed filing positions in all of the federal and state jurisdictions where it is required to file income tax returns as well as all open tax years in these jurisdictions. The periods subject to examination for the Company’s federal income tax returns are the 2015 through 2017 tax years. The periods subject to examination for the Company’s state income tax returns are the 2011 through 2017 tax years. The Company believes that the outcome of any examinations will not have a material effect on its financial condition, results of operations or cash flows. The Company had no unrecognized tax benefits in 2018 and 2017 . As a result, there will be no effect on the Company’s effective income tax rate in future periods due to the recognition of unrecognized tax benefits.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Earnings	12 Months Ended
	Dec. 29, 2018
Equity [Abstract]
Accumulated Other Comprehensive Earnings	(7) Accumulated Other Comprehensive Earnings (Losses) A reconciliation of the changes in accumulated other comprehensive earnings (losses) net of income taxes for 2018 , 2017 and 2016 is as follows: Investments Postretirement Benefit Accumulated Other Comprehensive Earnings (Losses) (Amounts are in thousands) Balances at December 26, 2015 $ 31,295 (5,027 ) 26,268 Unrealized gain on debt and equity securities 17,615 — 17,615 Net realized gain on debt and equity securities reclassified to investment income (19,792 ) — (19,792 ) Adjustment to postretirement benefit obligation — (664 ) (664 ) Net other comprehensive losses (2,177 ) (664 ) (2,841 ) Balances at December 31, 2016 29,118 (5,691 ) 23,427 Unrealized gain on debt and equity securities 175,978 — 175,978 Net realized gain on debt and equity securities reclassified to investment income (66,836 ) — (66,836 ) Adjustment to postretirement benefit obligation — (6,997 ) (6,997 ) Net other comprehensive earnings (losses) 109,142 (6,997 ) 102,145 Remeasurement of deferred income taxes reclassified to retained earnings 29,797 (2,733 ) 27,064 Balances at December 30, 2017 168,057 (15,421 ) 152,636 Unrealized loss on debt securities (19,126 ) — (19,126 ) Net realized loss on debt securities reclassified to investment income 346 — 346 Adjustment to postretirement benefit obligation — 8,692 8,692 Net other comprehensive (losses) earnings (18,780 ) 8,692 (10,088 ) Cumulative effect of net unrealized gain on equity securities reclassified to retained earnings (198,310 ) — (198,310 ) Balances at December 29, 2018 $ (49,033 ) (6,729 ) (55,762 ) In February 2018, an ASU was issued in response to the Tax Act. The ASU permits companies to reclassify stranded tax effects due to the reduction of the federal statutory income tax rate from accumulated other comprehensive earnings to retained earnings. The Company elected to adopt the ASU early and reclassified $27,064,000 from accumulated other comprehensive earnings to retained earnings in 2017. In 2018, the Company adopted the ASU requiring equity securities be measured at fair value with net unrealized gains and losses from changes in the fair value recognized in earnings. Prior to adoption of the ASU, equity securities were classified as available-for-sale and measured at fair value. Changes in fair value determined to be temporary were reported in other comprehensive earnings net of income taxes. Upon adoption of the ASU, the Company reclassified the cumulative effect of the net unrealized gain on equity securities net of income taxes as of December 31, 2017 of $198,310,000 from accumulated other comprehensive earnings to retained earnings.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 29, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	(8) Commitments and Contingencies (a) Operating Leases The Company conducts a major portion of its retail operations from leased locations. Initial terms of the leases are typically 20 years followed by five year renewal options and may include rent escalation clauses. Minimum rentals represent fixed lease obligations, including insurance and maintenance to the extent they are fixed in the lease. Contingent rentals represent variable lease obligations, including real estate taxes, insurance, maintenance and, for certain locations, additional rentals based on a percentage of sales in excess of stipulated minimums (excess rent). The payment of variable real estate taxes, insurance and maintenance is generally based on the Company’s pro-rata share of total shopping center square footage. The Company recognizes rent expense for operating leases with rent escalation clauses on a straight-line basis over the applicable lease term. The Company estimates excess rent, where applicable, based on annual sales projections and uses the straight-line method to amortize the cost to rent expense. The annual sales projections are reviewed periodically and adjusted if necessary. Additionally, the Company has operating leases for certain transportation and other equipment. Total rental expense for 2018 , 2017 and 2016 was as follows: 2018 2017 2016 (Amounts are in thousands) Minimum rentals $ 449,138 437,403 419,032 Contingent rentals 133,382 126,855 125,406 Sublease rental income (4,339 ) (4,617 ) (4,577 ) $ 578,181 559,641 539,861 As of December 29, 2018 , future minimum rentals for all noncancelable operating leases and related subleases are as follows: Year Minimum Rental Commitments Sublease Rental Income Net (Amounts are in thousands) 2019 $ 434,781 2,913 431,868 2020 407,409 365 407,044 2021 371,476 230 371,246 2022 332,785 188 332,597 2023 287,636 188 287,448 Thereafter 1,886,433 690 1,885,743 $ 3,720,520 4,574 3,715,946 In 2019, the Company will adopt the ASU requiring the lease rights and obligations arising from lease contracts, including existing and new arrangements, to be recognized as assets and liabilities on the consolidated balance sheet. The Company estimates it will recognize approximately $2.9 billion of lease rights and obligations. The Company also owns shopping centers which are leased to tenants for minimum rentals plus contingent rentals. Minimum rentals represent fixed lease obligations, including insurance and maintenance. Contingent rentals represent variable lease obligations, including real estate taxes, insurance, maintenance and, for certain locations, excess rent. Rental income was $183,963,000 , $158,121,000 and $133,656,000 for 2018 , 2017 and 2016 , respectively. As of December 29, 2018 , future minimum rentals to be received for all noncancelable operating leases are as follows: Year (Amounts are in thousands) 2019 $ 139,159 2020 117,024 2021 91,137 2022 67,107 2023 45,836 Thereafter 162,361 $ 622,624 (b) Letters of Credit As of December 29, 2018 , the Company had outstanding $5,475,000 in trade letters of credit and $12,950,000 in standby letters of credit to support certain purchase obligations. (c) Litigation The Company is subject from time to time to various lawsuits, claims and charges arising in the normal course of business. The Company believes its recorded reserves are adequate in light of the probable and estimable liabilities. The estimated amount of reasonably possible losses for lawsuits, claims and charges, individually and in the aggregate, is considered to be immaterial. In the opinion of management, the ultimate resolution of these legal proceedings will not have a material adverse effect on the Company’s financial condition, results of operations or cash flows.

Subsequent Event Subsequent Eve

Subsequent Event Subsequent Event (Notes)	12 Months Ended
	Dec. 29, 2018
Subsequent Events [Abstract]
Subsequent Events [Text Block]	(9) Subsequent Event On January 2, 2019 , the Company declared a quarterly dividend on its common stock of $0.26 per share or $185,800,000 , payable February 1, 2019 to stockholders of record as of the close of business January 15, 2019 .

Quarterly Information (unaudite

Quarterly Information (unaudited)	12 Months Ended
	Dec. 29, 2018
Quarterly Financial Information Disclosure [Abstract]
Quarterly Information (unaudited)	(10) Quarterly Information (unaudited) Following is a summary of the quarterly results of operations for 2018 and 2017 . All quarters have 13 weeks. Quarter First Second Third Fourth (Amounts are in thousands, except per share amounts) 2018 Revenues $ 9,345,807 8,826,003 8,858,101 9,365,807 Costs and expenses 8,511,850 8,183,211 8,274,949 8,681,305 Net earnings 680,271 616,172 677,744 406,980 Earnings per share 0.93 0.84 0.94 0.57 2017 Revenues $ 8,752,946 8,482,827 8,586,080 9,014,985 Costs and expenses 8,012,934 7,869,524 7,951,286 8,270,270 Net earnings 555,271 495,072 474,927 766,624 Earnings per share 0.73 0.65 0.63 1.04 Net earnings and earnings per share for the fourth quarter of 2018 were negatively impacted by the ASU requiring equity securities be measured at fair value with net unrealized gains and losses from changes in the fair value recognized in earnings. Excluding the impact of the ASU, net earnings would have been $660,308,000 or $0.92 per share. During the fourth quarter of 2017, the Company recorded the remeasurement of deferred income taxes due to the Tax Act. Excluding the impact of the remeasurement, net earnings would have been $542,429,000 or $0.74 per share.

Schedule II - Valuation and Qua

Schedule II - Valuation and Qualifying Accounts	12 Months Ended
	Dec. 29, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Schedule II - Valuation and Qualifying Accounts	Schedule II PUBLIX SUPER MARKETS, INC. Valuation and Qualifying Accounts Years ended December 29, 2018 , December 30, 2017 and December 31, 2016 Balance at Year Additions Income Deductions Reserves Balance at Year (Amounts are in thousands) Year Ended December 29, 2018 Reserves not deducted from assets: Self-insurance reserves: Current $ 137,100 403,598 395,457 145,241 Noncurrent 218,598 3,821 — 222,419 $ 355,698 407,419 395,457 367,660 Year Ended December 30, 2017 Reserves not deducted from assets: Self-insurance reserves: Current $ 139,554 342,451 344,905 137,100 Noncurrent 216,125 2,473 — 218,598 $ 355,679 344,924 344,905 355,698 Year Ended December 31, 2016 Reserves not deducted from assets: Self-insurance reserves: Current $ 135,865 341,699 338,010 139,554 Noncurrent 214,474 1,651 — 216,125 $ 350,339 343,350 338,010 355,679

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 29, 2018
Accounting Policies [Abstract]
Business	Business Publix Super Markets, Inc. and its wholly owned subsidiaries (the Company) are in the business of operating retail food supermarkets in Florida, Georgia, Alabama, South Carolina, Tennessee, North Carolina and Virginia. The Company was founded in 1930 and later merged into another corporation that was originally incorporated in 1921. The Company has no other significant lines of business or industry segments. See percentage of consolidated sales by merchandise category on page 1.
Principles of Consolidation	Principles of Consolidation The consolidated financial statements include the accounts of the Company, its wholly owned subsidiaries and certain joint ventures in which the Company has a controlling financial interest. All significant intercompany balances and transactions are eliminated in consolidation.
Fiscal Year	Fiscal Year The Company’s fiscal year ends on the last Saturday in December. Fiscal years 2018 and 2017 include 52 weeks and fiscal year 2016 includes 53 weeks.
Cash Equivalents	Cash Equivalents The Company considers all liquid investments with maturities of three months or less to be cash equivalents.
Trade Receivables	Trade Receivables Trade receivables primarily include amounts due from vendor allowances, debit and credit card sales and third party insurance pharmacy billings.
Inventories	Inventories Inventories are valued at the lower of cost or market. The dollar value last-in, first-out (LIFO) method was used to determine the cost for 85% of inventories as of December 29, 2018 and December 30, 2017 . Under this method, inventory is stated at cost, which is determined by applying a cost-to-retail ratio to each similar merchandise category’s ending retail value. The cost of the remaining inventories was determined using the first-in, first-out (FIFO) method. The FIFO cost of inventory approximates replacement or current cost. The FIFO method is used to value manufactured, seasonal, certain perishable and other miscellaneous inventory items because of fluctuating costs and inconsistent product availability. The Company also reduces inventory for estimated losses related to shrink. If all inventories were valued using the FIFO method, inventories and current assets would have been higher than reported by $489,058,000 and $464,888,000 as of December 29, 2018 and December 30, 2017 , respectively.
Investments	Investments Debt securities are classified as available-for-sale and measured at fair value. The Company evaluates whether debt securities are other-than-temporarily impaired (OTTI) based on criteria that include the extent to which the cost (cost of the debt security adjusted for amortization of premium or accretion of discount) exceeds market value, the duration of the market value decline, the credit rating of the issuer or security, the failure of the issuer to make scheduled principal or interest payments and the financial health and prospects of the issuer or security. Declines in the fair value of debt securities determined to be OTTI are recognized in earnings and reported as OTTI losses. Debt securities with unrealized losses are considered OTTI if the Company intends to sell the debt security or if the Company will be required to sell the debt security prior to any anticipated recovery. If the Company determines that a debt security is OTTI under these circumstances, the impairment recognized in earnings is measured as the difference between the cost and the fair value. A debt security is also determined to be OTTI if the Company does not expect to recover the cost of the debt security. However, in this circumstance, if the Company does not intend to sell the debt security and will not be required to sell the debt security, the impairment recognized in earnings equals the estimated credit loss as measured by the difference between the present value of expected cash flows and the cost of the debt security. Expected cash flows are discounted using the debt security’s effective interest rate. Changes in the fair value of debt securities determined to be temporary are reported in other comprehensive earnings net of income taxes and included as a component of stockholders’ equity. In 2018, the Company adopted the Accounting Standards Update (ASU) requiring equity securities be measured at fair value with net unrealized gains and losses from changes in the fair value recognized in earnings (fair value adjustment). The fair value adjustment also includes the cumulative effect of the ASU as of December 31, 2017 reclassified from accumulated other comprehensive earnings to retained earnings. Prior to adoption of the ASU, changes in the fair value of equity securities were accounted for similar to changes in the fair value of debt securities. Equity securities were classified as available-for-sale and measured at fair value. Declines in the fair value of equity securities determined to be OTTI were recognized in earnings and reported as OTTI losses. An equity security was determined to be OTTI if the Company did not expect to recover the cost of the equity security. Changes in the fair value of equity securities determined to be temporary were reported in other comprehensive earnings net of income taxes and included as a component of stockholders’ equity. Interest and dividend income, amortization of premiums, accretion of discounts and realized gains and losses on the sale of debt and equity securities are included in investment income. Interest income is accrued as earned. Dividend income is recognized as income on the ex-dividend date. The cost of debt and equity securities sold is based on the FIFO method. With the adoption of the ASU, the fair value adjustment on equity securities held as of December 29, 2018 is also included in investment income.
Property, Plant and Equipment and Depreciation	Property, Plant and Equipment and Depreciation Assets are recorded at cost and depreciated using the straight-line method over their estimated useful lives or the terms of the related leases, if shorter, as follows: buildings and improvements (10–40 years); furniture, fixtures and equipment (3–20 years); and leasehold improvements (10–20 years). Maintenance and repairs are expensed as incurred. Expenditures for renewals and betterments are capitalized. The gain or loss realized on disposed assets or assets to be disposed of is recorded in earnings.
Long-Lived Assets	Long-Lived Assets The Company reviews its long-lived assets for impairment whenever events or changes in circumstances indicate that the net book value of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the net book value of an asset to the future net undiscounted cash flows expected to be generated by the asset. An impairment loss is recorded for the excess of the net book value over the fair value of the asset. The fair value is estimated based on expected discounted future cash flows. Assets to be disposed of are reported at the lower of the carrying amount or fair value less cost to sell and are no longer depreciated. Long-lived assets, including buildings and improvements, leasehold improvements, and furniture, fixtures and equipment, are evaluated for impairment at the supermarket level.
Self-Insurance	Self-Insurance The Company is self-insured for health care claims and property, plant and equipment losses. The Company has insurance coverage for losses in excess of self-insurance limits for workers’ compensation, general liability and fleet liability claims. Self-insurance reserves are established for health care, workers’ compensation, general liability and fleet liability claims. These reserves are determined based on actual claims experience and an estimate of claims incurred but not reported including, where necessary, actuarial studies. Actuarial projections of losses for general liability and workers’ compensation claims are discounted.
Postretirement Benefit	Postretirement Benefit The Company provides a postretirement life insurance benefit for certain salaried and hourly full-time employees who meet the eligibility requirements. Effective January 1, 2002, the Company amended the postretirement life insurance benefit under its Group Life Insurance Plan. To receive the postretirement life insurance benefit after the amendment, an employee must have had at least five years of full-time service and the employee’s age plus years of credited service must have equaled 65 or greater as of October 1, 2001. At retirement, such employees also must be at least age 55 with at least 10 years of full-time service to be eligible to receive the postretirement life insurance benefit. Actuarial projections are used to calculate the year end postretirement benefit obligation, discounted using a yield curve methodology based on high quality bonds with a rating of AA or better. Actuarial losses are amortized from accumulated other comprehensive earnings into net periodic postretirement benefit cost over future years when the accumulation of such losses exceeds 10% of the year end postretirement benefit obligation.
Comprehensive Earnings	Comprehensive Earnings Comprehensive earnings include net earnings and other comprehensive earnings. Other comprehensive earnings include revenues, expenses, gains and losses that have been excluded from net earnings and recorded directly to stockholders’ equity. Included in other comprehensive earnings for the Company are unrealized gains and losses on debt securities in 2018, unrealized gains and losses on debt and equity securities in 2017 and 2016 and adjustments to the postretirement benefit obligation.
Revenue Recognition	Revenue Recognition Revenue is recognized at the point of sale for retail sales. Customer returns are immaterial. Vendor coupons that are reimbursed are accounted for as sales. Coupons and other sales incentives offered by the Company that are not reimbursed are recorded as a reduction of sales. The Company records sales net of applicable sales taxes.
Sales Taxes	.
Other Operating Income	Other Operating Income Other operating income is recognized on a net revenue basis as earned. Other operating income includes income generated from other activities, primarily lottery commissions, licensee sales commissions, mall gift card commissions, automated teller transaction fees, money transfer fees, vending machine commissions and coupon redemption income.
Cost of Merchandise Sold	Cost of Merchandise Sold Cost of merchandise sold includes costs of inventory and costs related to in-store production. Cost of merchandise sold also includes inbound freight charges, purchasing and receiving costs, warehousing costs and other costs of the Company’s distribution network. Allowances and credits, including cooperative advertising allowances, received from a vendor in connection with the purchase or promotion of the vendor’s products are recognized as a reduction of cost of merchandise sold as earned. These allowances and credits are recognized as earned in accordance with the underlying agreement with the vendor and completion of the earnings process. Short-term vendor agreements with advance payment provisions are recorded as a current liability and recognized over the appropriate period as earned according to the underlying agreements. Long-term vendor agreements with advance payment provisions are recorded as a noncurrent liability and recognized over the appropriate period as earned according to the underlying agreements.
Advertising Costs	Advertising Costs Advertising costs are expensed as incurred and were $249,123,000 , $251,933,000 and $260,367,000 for 2018 , 2017 and 2016 , respectively.
Other Nonoperating Income, net	Other Nonoperating Income, net Other nonoperating income, net includes rent received from tenants in owned shopping centers, net of related expenses, and other miscellaneous nonoperating income.
Income Taxes	Income Taxes Deferred income taxes are established for temporary differences between financial and tax reporting bases and are subsequently adjusted to reflect changes in income tax rates expected to be in effect when the temporary differences reverse. The Company recognizes accrued interest and penalties related to income tax liabilities as a component of income tax expense. The Company invests in certain investment related tax credits that promote affordable housing and renewable energy. These investments generate a return primarily through the realization of federal and state tax credits and other tax benefits. The Company accounts for its affordable housing investments using the proportional amortization method. Under this method, the investment is amortized into income tax expense in proportion to the tax credits received and the investment tax credits are recognized as a reduction of income tax expense. The Company accounts for its renewable energy investments using the deferral method. Under this method, the investment tax credits are recognized as a reduction of the renewable energy investments.
Common Stock and Earnings Per Share	Common Stock and Earnings Per Share Earnings per share is calculated by dividing net earnings by the weighted average shares outstanding. Basic and diluted earnings per share are the same because the Company does not have options or other stock compensation programs that impact the calculation of diluted earnings per share. All shares owned by the Employee Stock Ownership Plan (ESOP) are included in the earnings per share calculations. Dividends paid to the ESOP, as well as dividends on all other common stock shares, are reflected as a reduction of retained earnings. All common stock shares, including ESOP and 401(k) Plan shares, receive one vote per share and have the same dividend rights. The voting rights for ESOP shares allocated to participants’ accounts are passed through to the participants. The Trustee of the Company’s common stock in the 401(k) Plan votes the shares held in that plan.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 29, 2018
Accounting Policies [Abstract]
Assets Recorded at Cost and Depreciated Using Straight-Line Method Over Estimated Useful Lives or Terms of Related Leases, If Shorter	Assets are recorded at cost and depreciated using the straight-line method over their estimated useful lives or the terms of the related leases, if shorter, as follows: buildings and improvements (10–40 years); furniture, fixtures and equipment (3–20 years); and leasehold improvements (10–20 years). Maintenance and repairs are expensed as incurred. Expenditures for renewals and betterments are capitalized. The gain or loss realized on disposed assets or assets to be disposed of is recorded in earnings.

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 29, 2018
Fair Value Disclosures [Abstract]
Summary of Fair Value Measurements for Available for Sale Securities	Following is a summary of fair value measurements for investments as of December 29, 2018 and December 30, 2017 : Fair Value Level 1 Level 2 Level 3 (Amounts are in thousands) December 29, 2018 $ 6,577,430 2,372,931 4,204,499 — December 30, 2017 6,433,311 2,545,320 3,887,991 —

Investments (Tables)

Investments (Tables)	12 Months Ended
	Dec. 29, 2018
Investments, Debt and Equity Securities [Abstract]
Available For Sale Securities [Table Text Block]	Following is a summary of debt securities as of December 29, 2018 and December 30, 2017 : Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (Amounts are in thousands) 2018 Tax exempt bonds $ 1,256,673 184 12,759 1,244,098 Taxable bonds 2,527,468 1,737 55,085 2,474,120 Restricted investment 160,318 520 346 160,492 $ 3,944,459 2,441 68,190 3,878,710 2017 Tax exempt bonds $ 1,811,523 602 16,420 1,795,705 Taxable bonds 2,115,174 695 25,443 2,090,426 $ 3,926,697 1,297 41,863 3,886,131
Amortized Cost and Fair Value of Available for Sale Securities by Expected Maturity [Table Text Block]	The cost and fair value of debt securities by expected maturity as of December 29, 2018 and December 30, 2017 are as follows: 2018 2017 Cost Fair Value Cost Fair Value (Amounts are in thousands) Due in one year or less $ 563,272 560,992 917,576 915,579 Due after one year through five years 2,831,916 2,768,971 2,794,099 2,757,504 Due after five years through ten years 542,488 541,852 205,792 203,533 Due after ten years 6,783 6,895 9,230 9,515 $ 3,944,459 3,878,710 3,926,697 3,886,131
Temporarily Impaired Available for Sale Securities by Time Period Impaired [Table Text Bock}	Following is a summary of temporarily impaired debt securities by the time period impaired as of December 29, 2018 and December 30, 2017 : Less Than 12 Months 12 Months or Longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (Amounts are in thousands) 2018 Tax exempt bonds $ 25,150 95 1,182,783 12,664 1,207,933 12,759 Taxable bonds 645,379 5,821 1,464,208 49,264 2,109,587 55,085 Restricted investment 28,687 346 — — 28,687 346 $ 699,216 6,262 2,646,991 61,928 3,346,207 68,190 2017 Tax exempt bonds $ 1,543,151 13,827 136,217 2,593 1,679,368 16,420 Taxable bonds 811,886 4,908 1,153,645 20,535 1,965,531 25,443 $ 2,355,037 18,735 1,289,862 23,128 3,644,899 41,863
Equity Securities [Table Text Block]	Following is a summary of the fair value of equity securities as of December 29, 2018 and December 30, 2017 : 2018 2017 (Amounts are in thousands) Equity securities $ 2,698,720 2,383,095 Restricted investment — 164,085 $ 2,698,720 2,547,180
Investment Income [Table Text Block]	Following is a summary of investment income for 2018 , 2017 and 2016 : 2018 2017 2016 (Amounts are in thousands) Interest and dividend income $ 129,953 117,702 100,811 Net realized gain on sale of investments 109,547 108,924 32,256 239,500 226,626 133,067 Fair value adjustment, due to net unrealized loss, on equity securities held at end of year (107,466 ) — — Net gain on sale of equity securities previously recognized through fair value adjustment (75,335 ) — — $ 56,699 226,626 133,067

Aggregate Maturities of Long-Te

Aggregate Maturities of Long-Term Debt (Tables)	12 Months Ended
	Dec. 29, 2018
Maturities of Long-term Debt [Abstract]
Aggregate Annual Maturities and Scheduled Payments of Long-Term Debt	As of December 29, 2018 , the aggregate annual maturities and scheduled payments of long-term debt are as follows: Year (Amounts are in thousands) 2019 $ 4,954 2020 41,792 2021 34,812 2022 25,096 2023 18,693 Thereafter 42,318 $ 167,665

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 29, 2018
Income Tax Disclosure [Abstract]
Schedule Of Allocation Of Income Taxes [Table Text Block]	Total income taxes for 2018 , 2017 and 2016 were allocated as follows: 2018 2017 2016 (Amounts are in thousands) Earnings $ 539,801 735,612 914,688 Other comprehensive (losses) earnings (3,440 ) 64,324 (1,789 ) $ 536,361 799,936 912,899
Provision for Income Taxes [Table Text Block]	The provision for income taxes consists of the following: Current Deferred Total (Amounts are in thousands) 2018 Federal $ 413,735 59,377 473,112 State 62,821 3,868 66,689 $ 476,556 63,245 539,801 2017 Federal $ 771,355 (113,620 ) 657,735 State 64,113 13,764 77,877 $ 835,468 (99,856 ) 735,612 2016 Federal $ 820,989 20,697 841,686 State 69,342 3,660 73,002 $ 890,331 24,357 914,688
Reconciliation of Provision for Income Taxes at Federal Statutory Tax Rate to Earnings Before Income Taxes [Table Text Block]	A reconciliation of the provision for income taxes at the federal statutory income tax rate of 21% for 2018 and 35% for 2017 and 2016 to earnings before income taxes compared to the Company’s actual income tax expense is as follows: 2018 2017 2016 (Amounts are in thousands) Federal tax at statutory income tax rate $ 613,403 1,059,627 1,029,132 State income taxes (net of federal tax benefit) 52,684 50,621 47,451 ESOP dividend (41,175 ) (65,111 ) (65,232 ) Other, net (85,111 ) (85,330 ) (96,663 ) Remeasurement of deferred income taxes — (224,195 ) — $ 539,801 735,612 914,688
Tax Effects of Temporary Differences That Give Rise to Deferred Income Taxes [Table Text Bock]	The tax effects of temporary differences that give rise to significant portions of deferred income taxes as of December 29, 2018 and December 30, 2017 are as follows: 2018 2017 (Amounts are in thousands) Deferred tax liabilities and (assets): Property, plant and equipment $ 581,290 487,026 Inventories 25,989 23,784 Self-insurance reserves (79,467 ) (77,783 ) Retirement plan contributions (41,424 ) (42,547 ) Postretirement benefit cost (28,224 ) (30,226 ) Purchase allowances (11,114 ) (9,967 ) Investments (10,811 ) 30,090 Lease accounting (4,662 ) (8,576 ) Other (10,820 ) (10,849 ) $ 420,757 360,952

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Earnings (Tables)	12 Months Ended
	Dec. 29, 2018
Equity [Abstract]
Schedule of Changes in Accumulated Other Comprehensive Earnings (Losses)	Investments Postretirement Benefit Accumulated Other Comprehensive Earnings (Losses) (Amounts are in thousands) Balances at December 26, 2015 $ 31,295 (5,027 ) 26,268 Unrealized gain on debt and equity securities 17,615 — 17,615 Net realized gain on debt and equity securities reclassified to investment income (19,792 ) — (19,792 ) Adjustment to postretirement benefit obligation — (664 ) (664 ) Net other comprehensive losses (2,177 ) (664 ) (2,841 ) Balances at December 31, 2016 29,118 (5,691 ) 23,427 Unrealized gain on debt and equity securities 175,978 — 175,978 Net realized gain on debt and equity securities reclassified to investment income (66,836 ) — (66,836 ) Adjustment to postretirement benefit obligation — (6,997 ) (6,997 ) Net other comprehensive earnings (losses) 109,142 (6,997 ) 102,145 Remeasurement of deferred income taxes reclassified to retained earnings 29,797 (2,733 ) 27,064 Balances at December 30, 2017 168,057 (15,421 ) 152,636 Unrealized loss on debt securities (19,126 ) — (19,126 ) Net realized loss on debt securities reclassified to investment income 346 — 346 Adjustment to postretirement benefit obligation — 8,692 8,692 Net other comprehensive (losses) earnings (18,780 ) 8,692 (10,088 ) Cumulative effect of net unrealized gain on equity securities reclassified to retained earnings (198,310 ) — (198,310 ) Balances at December 29, 2018 $ (49,033 ) (6,729 ) (55,762 )

Operating Leases (Tables)

Operating Leases (Tables)	12 Months Ended
	Dec. 29, 2018
Leases, Operating [Abstract]
Total Rental Expense	Total rental expense for 2018 , 2017 and 2016 was as follows: 2018 2017 2016 (Amounts are in thousands) Minimum rentals $ 449,138 437,403 419,032 Contingent rentals 133,382 126,855 125,406 Sublease rental income (4,339 ) (4,617 ) (4,577 ) $ 578,181 559,641 539,861
Future Minimum Lease Payments for All Noncancelable Operating Leases and Related Subleases	As of December 29, 2018 , future minimum rentals for all noncancelable operating leases and related subleases are as follows: Year Minimum Rental Commitments Sublease Rental Income Net (Amounts are in thousands) 2019 $ 434,781 2,913 431,868 2020 407,409 365 407,044 2021 371,476 230 371,246 2022 332,785 188 332,597 2023 287,636 188 287,448 Thereafter 1,886,433 690 1,885,743 $ 3,720,520 4,574 3,715,946
Operating Leases Future Minimum Payments Received Fiscal Year Maturity Schedule [Table Text Block]	As of December 29, 2018 , future minimum rentals to be received for all noncancelable operating leases are as follows: Year (Amounts are in thousands) 2019 $ 139,159 2020 117,024 2021 91,137 2022 67,107 2023 45,836 Thereafter 162,361 $ 622,624

Quarterly Information (unaudi_2

Quarterly Information (unaudited) (Tables)	12 Months Ended
	Dec. 29, 2018
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results of Operations	Following is a summary of the quarterly results of operations for 2018 and 2017 . All quarters have 13 weeks. Quarter First Second Third Fourth (Amounts are in thousands, except per share amounts) 2018 Revenues $ 9,345,807 8,826,003 8,858,101 9,365,807 Costs and expenses 8,511,850 8,183,211 8,274,949 8,681,305 Net earnings 680,271 616,172 677,744 406,980 Earnings per share 0.93 0.84 0.94 0.57 2017 Revenues $ 8,752,946 8,482,827 8,586,080 9,014,985 Costs and expenses 8,012,934 7,869,524 7,951,286 8,270,270 Net earnings 555,271 495,072 474,927 766,624 Earnings per share 0.73 0.65 0.63 1.04

Schedule II - Valuation and Q_2

Schedule II - Valuation and Qualifying Accounts Schedule II - Valuation and Qualifying Accounts (Tables)	12 Months Ended
	Dec. 29, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Schedule II Valuation of Qualifying Accounts [Table Text Block]	Balance at Year Additions Income Deductions Reserves Balance at Year (Amounts are in thousands) Year Ended December 29, 2018 Reserves not deducted from assets: Self-insurance reserves: Current $ 137,100 403,598 395,457 145,241 Noncurrent 218,598 3,821 — 222,419 $ 355,698 407,419 395,457 367,660 Year Ended December 30, 2017 Reserves not deducted from assets: Self-insurance reserves: Current $ 139,554 342,451 344,905 137,100 Noncurrent 216,125 2,473 — 218,598 $ 355,679 344,924 344,905 355,698 Year Ended December 31, 2016 Reserves not deducted from assets: Self-insurance reserves: Current $ 135,865 341,699 338,010 139,554 Noncurrent 214,474 1,651 — 216,125 $ 350,339 343,350 338,010 355,679

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 29, 2018USD ($)Age	Dec. 30, 2017USD ($)	Dec. 31, 2016USD ($)
Summary Of Significant Accounting Policies [Line Items]
Percent of cost for inventories determined using LIFO	85.00%	85.00%
Excess of Replacement or Current Costs over Stated LIFO Value | $	$ 489,058,000	$ 464,888,000
Postretirement Benefits Number Of Years Of Full Time Service For Eligibility	5 years
Age Plus Years Of Service Required To Qualify For Post Retirement Benefits | Age	65
Minimum Retirement Age For Eligible Employees Of Postretirement Plans | Age	55
Minimum Years Of Full Time Service For Eligible Employees Of Postretirement Plans	10 years
Accumulation Of Losses Exceeds Benefit Obligation	10.00%
Advertising costs | $	$ 249,123,000	$ 251,933,000	$ 260,367,000

Assets Recorded at Cost and Dep

Assets Recorded at Cost and Depreciated Using Straight-Line Method Over Estimated Useful Lives or Terms of Related Leases, If Shorter (Detail)	12 Months Ended
	Dec. 29, 2018
Buildings and improvements | Minimum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Estimated useful life, years	10 years
Buildings and improvements | Maximum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Estimated useful life, years	40 years
Furniture and Fixtures [Member] | Minimum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Estimated useful life, years	3 years
Furniture and Fixtures [Member] | Maximum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Estimated useful life, years	20 years
Leasehold improvements | Minimum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Estimated useful life, years	10 years
Leasehold improvements | Maximum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Estimated useful life, years	20 years

Summary of Fair Value Measureme

Summary of Fair Value Measurements for Available for Sale Securities (Detail) - USD ($) $ in Thousands	Dec. 29, 2018	Dec. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	$ 6,577,430	$ 6,433,311
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	2,372,931	2,545,320
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	4,204,499	3,887,991
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	$ 0	$ 0

Available for Sale Securities (

Available for Sale Securities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 3,944,459	$ 3,926,697
Debt Securities, Available-for-sale, Unrealized Gain	2,441	1,297
Debt Securities, Available-for-sale, Unrealized Loss	68,190	41,863
Debt Securities, Available-for-sale, Fair Value	3,878,710	3,886,131
Tax exempt bonds
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	1,256,673	1,811,523
Debt Securities, Available-for-sale, Unrealized Gain	184	602
Debt Securities, Available-for-sale, Unrealized Loss	12,759	16,420
Debt Securities, Available-for-sale, Fair Value	1,244,098	1,795,705
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	2,527,468	2,115,174
Debt Securities, Available-for-sale, Unrealized Gain	1,737	695
Debt Securities, Available-for-sale, Unrealized Loss	55,085	25,443
Debt Securities, Available-for-sale, Fair Value	2,474,120	2,090,426
Debt Securities, Restricted [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	160,318	0
Debt Securities, Available-for-sale, Unrealized Gain	520	0
Debt Securities, Available-for-sale, Unrealized Loss	346	0
Debt Securities, Available-for-sale, Fair Value	$ 160,492	$ 0

Amortized Cost and Fair Value o

Amortized Cost and Fair Value of Available for Sale Securities by Expected Maturity (Detail) - USD ($) $ in Thousands	Dec. 29, 2018	Dec. 30, 2017
Cost
Due in one year or less	$ 563,272	$ 917,576
Due after one year through five years	2,831,916	2,794,099
Due after five years through ten years	542,488	205,792
Due after ten years	6,783	9,230
Debt Securities, Available-for-sale, Amortized Cost	3,944,459	3,926,697
Fair Value
Due in one year or less	560,992	915,579
Due after one year through five years	2,768,971	2,757,504
Due after five years through ten years	541,852	203,533
Due after ten years	6,895	9,515
Available-for-sale Securities, Debt Maturities, Fair Value	$ 3,878,710	$ 3,886,131

Temporarily Impaired Available

Temporarily Impaired Available for Sale Securities by Time Period Impaired (Detail) - USD ($) $ in Thousands	Dec. 29, 2018	Dec. 30, 2017
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 699,216	$ 2,355,037
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	6,262	18,735
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	2,646,991	1,289,862
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	61,928	23,128
Debt Securities, Available-for-sale, Unrealized Loss Position	3,346,207	3,644,899
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	68,190	41,863
Tax exempt bonds
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	25,150	1,543,151
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	95	13,827
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,182,783	136,217
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	12,664	2,593
Debt Securities, Available-for-sale, Unrealized Loss Position	1,207,933	1,679,368
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	12,759	16,420
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	645,379	811,886
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	5,821	4,908
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,464,208	1,153,645
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	49,264	20,535
Debt Securities, Available-for-sale, Unrealized Loss Position	2,109,587	1,965,531
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	55,085	25,443
Debt Securities, Restricted [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	28,687	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	346	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Unrealized Loss Position	28,687	0
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 346	$ 0

Investments - Additional Inform

Investments - Additional Information (Detail) $ in Thousands	Dec. 29, 2018USD ($)Securities	Dec. 30, 2017USD ($)
Debt Securities, Available-for-sale [Line Items]
Number of AFS securities issues contributing to total unrealized loss | Securities	400
Total, Unrealized Losses | $	$ 68,190	$ 41,863

Investments Investments Equity

Investments Investments Equity Securities (Details) - USD ($) $ in Thousands	Dec. 29, 2018	Dec. 30, 2017
Equity Securities, FV-NI [Line Items]
Equity Securities, FV-NI	$ 2,698,720	$ 2,547,180
Equity Securities [Member]
Equity Securities, FV-NI [Line Items]
Equity Securities, FV-NI	2,698,720	2,383,095
Equity Securities, Restricted [Member]
Equity Securities, FV-NI [Line Items]
Equity Securities, FV-NI, Restricted	$ 0	$ 164,085

Investments Investment Income (

Investments Investment Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Investment Income Debt and Equity Securities [Abstract]
Interest and Dividend Income	$ 129,953	$ 117,702	$ 100,811
Marketable Securities, Realized Gain	109,547	108,924	32,256
Investment Income Before Fair Value Adjustment	239,500	226,626	133,067
Equity Securities, FV-NI, Unrealized Loss	(107,466)	0	0
Equity Securities, FV-NI, Realized Gain	(75,335)	0	0
Investment Income	$ 56,699	$ 226,626	$ 133,067

Consolidation of Joint Ventur_2

Consolidation of Joint Ventures and Long-Term Debt Joint Ventures - Additional Information (Details) - USD ($)	Dec. 29, 2018	Dec. 30, 2017
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract]
Carrying amount of assets of the consolidated JVs	$ 144,197,000	$ 144,559,000
Carrying amount of liabilities of the consolidated JVs	$ 71,342,000	$ 67,631,000

Consolidation of Joint Ventur_3

Consolidation of Joint Ventures and Long-Term Debt Long Term Debt Assumptions, Maturities and Interest Rates (Details) - USD ($)	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Debt Instrument [Line Items]
Loans Assumed	$ 9,936,000	$ 0
JV Loans [Member] | Minimum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.75%
Debt Instrument Maturity Month And Year	2020-06
JV Loans [Member] | Maximum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.50%
Debt Instrument Maturity Month And Year	2027-04
Secured Debt [Member] | Minimum
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.70%
Debt Instrument Maturity Month And Year	2020-12
Secured Debt [Member] | Maximum
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.50%
Debt Instrument Maturity Month And Year	2027-01

Aggregate Annual Maturities and

Aggregate Annual Maturities and Scheduled Payments of Long-Term Debt (Detail) $ in Thousands	Dec. 29, 2018USD ($)
Long-term Debt, Fiscal Year Maturity [Abstract]
2,019	$ 4,954
2,020	41,792
2,021	34,812
2,022	25,096
2,023	18,693
Thereafter	42,318
Long-term Debt, Total	$ 167,665

Retirement Plans - Additional I

Retirement Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Retirement Benefits [Abstract]
Compensation expense (ESOP)	$ 337,712,000	$ 319,470,000	$ 334,422,000
Distributed shares subject to put option, fair value	288,580,000	311,315,000
ESOP, shares cost	2,846,419,000	2,741,823,000
Common stock related to ESOP	3,134,999,000	3,053,138,000
ESOP shares, fair value	$ 8,061,399,000	$ 7,252,657,000
Maximum contribution percentage of employees' eligible annual compensation	10.00%
Percentage of company match approved for eligible contributions	50.00%	50.00%
Percentage of eligible wages for matching contributions	3.00%	3.00%
Maximum amount match per employee	$ 750	$ 750
Compensation Expense (401(k))	$ 34,980,000	$ 33,636,000	$ 30,899,000

Total Income Taxes (Detail)

Total Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Earnings	$ 539,801	$ 735,612	$ 914,688
Other comprehensive (losses) earnings	(3,440)	64,324	(1,789)
Income Tax Expense, Intraperiod Tax Allocation	$ 536,361	$ 799,936	$ 912,899

Provision for Income Taxes (Det

Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Current
Federal	$ 413,735	$ 771,355	$ 820,989
State	62,821	64,113	69,342
Current income tax expense	476,556	835,468	890,331
Deferred
Federal	59,377	(113,620)	20,697
State	3,868	13,764	3,660
Deferred income taxes	63,245	(99,856)	24,357
Federal	473,112	657,735	841,686
State	66,689	77,877	73,002
Income tax expense	$ 539,801	$ 735,612	$ 914,688

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Federal statutory tax rate	21.00%	35.00%	35.00%
Tax Cuts and Jobs Act, Change in Tax Rate, Income Tax Expense (Benefit)	$ 0	$ 224,195,000	$ 0
Deferred Tax Assets, Valuation Allowance	0	0
Unrecognized tax benefits	$ 0	$ 0

Reconciliation of Provision for

Reconciliation of Provision for Income Taxes at Federal Statutory Tax Rate to Earnings Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Federal tax at statutory income tax rate	$ 613,403	$ 1,059,627	$ 1,029,132
State income taxes (net of federal tax benefit)	52,684	50,621	47,451
ESOP dividend	(41,175)	(65,111)	(65,232)
Other, net	(85,111)	(85,330)	(96,663)
Remeasurement of deferred income taxes	0	(224,195)	0
Income tax expense	$ 539,801	$ 735,612	$ 914,688

Tax Effect of Temporary Differe

Tax Effect of Temporary Differences That Give Rise to Deferred Income Taxes (Detail) - USD ($) $ in Thousands	Dec. 29, 2018	Dec. 30, 2017
Deferred tax liabilities and (assets):
Property, plant and equipment	$ 581,290	$ 487,026
Inventories	25,989	23,784
Self-insurance reserves	(79,467)	(77,783)
Retirement plan contributions	(41,424)	(42,547)
Postretirement benefit cost	(28,224)	(30,226)
Purchase allowances	(11,114)	(9,967)
Deferred Tax Assets, Investments	(10,811)
Deferred Tax Liabilities, Investments		30,090
Lease accounting	(4,662)	(8,576)
Other	(10,820)	(10,849)
Total deferred tax liabilities	$ 420,757	$ 360,952

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Earnings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Earnings (Losses), Net of Tax [Roll Forward]
Balances at beginning of period	$ 152,636
Unrealized gain (loss) on AFS securities	(19,126)	$ 175,978	$ 17,615
Net realized (gain) loss on debt and equity securities reclassified to investment income	346	(66,836)	(19,792)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax	8,692	(6,997)	(664)
Balances at end of period	(55,762)	152,636
Investments
Accumulated Other Comprehensive Earnings (Losses), Net of Tax [Roll Forward]
Balances at beginning of period	168,057	29,118	31,295
Unrealized gain (loss) on AFS securities	(19,126)	175,978	17,615
Net realized (gain) loss on debt and equity securities reclassified to investment income	346	(66,836)	(19,792)
Net other comprehensive (losses) earnings	(18,780)	109,142	(2,177)
Remeasurement of deferred income taxes reclassified to retained earnings		29,797
Cumulative effect of net unrealized gain on equity securities reclassified to retained earnings	(198,310)
Balances at end of period	(49,033)	168,057	29,118
Postretirement Benefit
Accumulated Other Comprehensive Earnings (Losses), Net of Tax [Roll Forward]
Balances at beginning of period	(15,421)	(5,691)	(5,027)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax	8,692	(6,997)	(664)
Net other comprehensive (losses) earnings	8,692	(6,997)	(664)
Remeasurement of deferred income taxes reclassified to retained earnings		(2,733)
Balances at end of period	(6,729)	(15,421)	(5,691)
Accumulated Other Comprehensive Earnings
Accumulated Other Comprehensive Earnings (Losses), Net of Tax [Roll Forward]
Balances at beginning of period	152,636	23,427	26,268
Unrealized gain (loss) on AFS securities	(19,126)	175,978	17,615
Net realized (gain) loss on debt and equity securities reclassified to investment income	346	(66,836)	(19,792)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax	8,692	(6,997)	(664)
Net other comprehensive (losses) earnings	(10,088)	102,145	(2,841)
Remeasurement of deferred income taxes reclassified to retained earnings		27,064
Cumulative effect of net unrealized gain on equity securities reclassified to retained earnings	(198,310)
Balances at end of period	$ (55,762)	$ 152,636	$ 23,427

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Earnings Accumulated Other Comprehensive Earnings Change in Accounting Principle (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Tax Act Reclassification [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Remeasurement of deferred income taxes reclassified to retained earnings		$ 27,064
Accounting Standards Update 2016-01 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of net unrealized gain on equity securities reclassified to retained earnings	$ 198,310

Commitments and Contingencies O

Commitments and Contingencies Operating Leases - Additional Information (Details)	Dec. 29, 2018
Leases [Abstract]
Lessee, Operating Lease, Term of Contract	20 years
Lessee, Operating Lease, Renewal Term	5 years

Total Rental Expense (Detail)

Total Rental Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Leases, Operating [Abstract]
Minimum rentals	$ 449,138	$ 437,403	$ 419,032
Contingent rentals	133,382	126,855	125,406
Sublease rental income	(4,339)	(4,617)	(4,577)
Operating leases rent expense total	$ 578,181	$ 559,641	$ 539,861

Future Minimum Rentals for All

Future Minimum Rentals for All Noncancelable Operating Leases and Related Subleases (Detail) $ in Thousands	Dec. 29, 2018USD ($)
Operating Leased Assets [Line Items]
2,019	$ 431,868
2,020	407,044
2,021	371,246
2,022	332,597
2,023	287,448
Thereafter	1,885,743
Operating Leases, Future Minimum Payments Due, Total	3,715,946
Minimum Rental Commitments
Operating Leased Assets [Line Items]
2,019	434,781
2,020	407,409
2,021	371,476
2,022	332,785
2,023	287,636
Thereafter	1,886,433
Operating Leases, Future Minimum Payments Due, Total	3,720,520
Sublease Rental Income
Operating Leased Assets [Line Items]
2,019	2,913
2,020	365
2,021	230
2,022	188
2,023	188
Thereafter	690
Operating Leases, Future Minimum Payments Due, Total	$ 4,574

Commitments and Contingencies_2

Commitments and Contingencies Operating Leases Lessor - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Leases [Abstract]
Rental Income, Nonoperating	$ 183,963,000	$ 158,121,000	$ 133,656,000

Commitments and Contingencies F

Commitments and Contingencies Future Minimum Rentals be Received (Details)	Dec. 29, 2018USD ($)
Leases, Operating [Abstract]
2,019	$ 139,159
2,020	117,024
2,021	91,137
2,022	67,107
2,023	45,836
Thereafter	162,361
Operating Leases, Future Minimum Payments Receivable	$ 622,624

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail)	Dec. 29, 2018USD ($)
Trade Letter of Credit
Commitments and Contingencies [Line Items]
Letter of credit to support purchase obligation	$ 5,475,000
Standby Letters of Credit
Commitments and Contingencies [Line Items]
Letter of credit to support purchase obligation	$ 12,950,000

Commitments and Contingencies L

Commitments and Contingencies Lease Accounting (Details) $ in Billions	12 Months Ended
	Dec. 29, 2018USD ($)
Lease Accounting [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated lease rights and obligations	$ 2.9

Subsequent Event Subsequent E_2

Subsequent Event Subsequent Event (Details) - Subsequent Event [Member] - USD ($)	Feb. 01, 2019	Jan. 15, 2019	Jan. 02, 2019
Subsequent Event [Line Items]
Dividends Payable, Date Declared			Jan. 2, 2019
Common Stock, Dividends, Per Share, Declared			$ 0.26
Dividends, Common Stock, Cash			$ 185,800,000
Dividends Payable, Date to be Paid	Feb. 1, 2019
Dividends Payable, Date of Record		Jan. 15, 2019

Quarterly Information (unaudi_3

Quarterly Information (unaudited) Quarterly Results of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 9,365,807	$ 8,858,101	$ 8,826,003	$ 9,345,807	$ 9,014,985	$ 8,586,080	$ 8,482,827	$ 8,752,946	$ 36,395,718	$ 34,836,838	$ 34,274,109
Costs and Expenses	8,681,305	8,274,949	8,183,211	8,511,850	8,270,270	7,951,286	7,869,524	8,012,934	33,651,315	32,104,014	31,522,458
Net earnings	$ 406,980	$ 677,744	$ 616,172	$ 680,271	$ 766,624	$ 474,927	$ 495,072	$ 555,271	$ 2,381,167	$ 2,291,894	$ 2,025,688
Basic and diluted earnings per share (in dollars per share)	$ 0.57	$ 0.94	$ 0.84	$ 0.93	$ 1.04	$ 0.63	$ 0.65	$ 0.73	$ 3.28	$ 3.04	$ 2.63

Impact of the Tax Act and the A

Impact of the Tax Act and the ASU (Detail)	12 Months Ended
	Dec. 29, 2018USD ($)$ / shares
Unusual or Infrequent Items, or Both [Abstract]
Net Earnings Excluding Impact of ASU | $	$ 660,308,000
Earnings per Share Excluding Impact of ASU | $ / shares	$ 0.92
Net Earnings Excluding Impact of Remeasurement | $	$ 542,429,000
Earnings Per Share Excluding Impact of Remeasurement | $ / shares	$ 0.74

Valuation and Qualifying Accoun

Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 355,698	$ 355,679	$ 350,339
Additions Charged to Income	407,419	344,924	343,350
Deductions From Reserves	395,457	344,905	338,010
Balance at End of Year	367,660	355,698	355,679
Self-Insurance Reserves, Current
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	137,100	139,554	135,865
Additions Charged to Income	403,598	342,451	341,699
Deductions From Reserves	395,457	344,905	338,010
Balance at End of Year	145,241	137,100	139,554
Self-Insurance Reserves, Noncurrent
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	218,598	216,125	214,474
Additions Charged to Income	3,821	2,473	1,651
Deductions From Reserves	0	0	0
Balance at End of Year	$ 222,419	$ 218,598	$ 216,125