Publix Super Markets (PUSH) 10-Q 1 May 19 2019 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 30, 2019	Apr. 15, 2019
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Trading Symbol	ck0000081061
Entity Registrant Name	PUBLIX SUPER MARKETS INC
Entity Central Index Key	0000081061
Current Fiscal Year End Date	--12-28
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		718,464,000

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 29, 2018
Current assets:
Cash and cash equivalents	$ 1,012,142	$ 599,264
Short-term investments	525,667	560,992
Trade receivables	694,921	682,981
Inventories	1,737,264	1,848,735
Prepaid expenses	57,348	122,224
Total current assets	4,027,342	3,814,196
Long-term investments	6,790,916	6,016,438
Other noncurrent assets	463,824	515,265
Operating lease right-of-use assets	2,860,491	0
Property, plant and equipment	14,498,163	14,174,564
Accumulated depreciation	(5,670,436)	(5,537,947)
Net property, plant and equipment	8,827,727	8,636,617
Total assets	22,970,300	18,982,516
Current liabilities:
Accounts payable	1,901,726	1,864,604
Accrued expenses:
Contributions to retirement plans	273,697	540,760
Self-insurance reserves	146,387	145,241
Salaries and wages	191,926	132,916
Other	365,519	321,080
Current portion of long-term debt	5,010	4,954
Current portion of operating lease liabilities	327,399	0
Federal and state income taxes	119,441	0
Total current liabilities	3,331,105	3,009,555
Deferred income taxes	507,146	420,757
Self-insurance reserves	223,927	222,419
Accrued postretirement benefit cost	105,406	105,308
Long-term debt	161,639	162,711
Operating lease liabilities	2,535,134	0
Other noncurrent liabilities	109,203	67,102
Total liabilities	6,973,560	3,987,852
Common stock related to Employee Stock Ownership Plan (ESOP)	3,510,183	3,134,999
Stockholders’ equity:
Common stock of $1 par value. Authorized 1,000,000 shares; issued 721,671 shares in 2019 and 715,445 shares in 2018	721,671	715,445
Additional paid-in capital	3,719,040	3,458,004
Retained earnings	11,635,790	10,840,654
Treasury stock at cost, 2,800 shares in 2019	(119,972)	0
Accumulated other comprehensive earnings (losses)	4,052	(55,762)
Common stock related to ESOP	(3,510,183)	(3,134,999)
Total stockholders’ equity	12,450,398	11,823,342
Noncontrolling interests	36,159	36,323
Total equity	15,996,740	14,994,664
Total liabilities and stockholders' equity	$ 22,970,300	$ 18,982,516

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Mar. 30, 2019	Dec. 29, 2018
Statement of Financial Position [Abstract]
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	721,671,000	715,445,000
Treasury stock at cost, shares	2,800,000	0

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Revenues:
Sales	$ 9,674,197	$ 9,273,466
Other operating income	85,913	72,341
Total revenues	9,760,110	9,345,807
Costs and expenses:
Cost of merchandise sold	6,966,392	6,681,457
Operating and administrative expenses	1,937,143	1,830,393
Total costs and expenses	8,903,535	8,511,850
Operating profit	856,575	833,957
Investment income	367,187	4,138
Other nonoperating income, net	19,313	22,028
Earnings before income tax expense	1,243,075	860,123
Income tax expense	262,104	179,852
Net earnings	$ 980,971	$ 680,271
Weighted average shares outstanding	716,026	734,195
Earnings per share	$ 1.37	$ 0.93

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net earnings	$ 980,971	$ 680,271
Other comprehensive earnings:
Unrealized gain (loss) on debt securities net of income taxes of $20,292 and $(8,175) in 2019 and 2018, respectively.	59,521	(23,981)
Reclassification adjustment for net realized loss on debt securities net of income taxes of $100 and $8 in 2019 and 2018, respectively.	293	22
Adjustment to postretirement benefit obligation net of income taxes of $193 in 2018.	0	565
Comprehensive earnings	$ 1,040,785	$ 656,877

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Unrealized gain (loss) on debt securities net of income taxes in 2019 and 2018, respectively.	$ 20,292	$ (8,175)
Reclassification adjustment for net realized loss on debt securities net of income taxes in 2019 and 2018, respectively.	100	8
Adjustment to postretirement benefit obligation net of income taxes in 2018.	$ 0	$ 193

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Cash flows from operating activities:
Cash received from customers	$ 9,698,829	$ 9,258,298
Cash paid to employees and suppliers	(8,317,811)	(7,945,490)
Income taxes refunded (paid)	1,152	(232,909)
Self-insured claims paid	(81,196)	(89,413)
Dividends and interest received	47,433	47,053
Other operating cash receipts	84,794	71,169
Other operating cash payments	(4,845)	(3,906)
Net cash provided by operating activities	1,428,356	1,104,802
Cash flows from investing activities:
Payment for capital expenditures	(254,836)	(449,980)
Proceeds from sale of property, plant and equipment	2,196	5,750
Payment for investments	(664,667)	(392,027)
Proceeds from sale and maturity of investments	310,379	310,943
Net cash used in investing activities	(606,928)	(525,314)
Cash flows from financing activities:
Payment for acquisition of common stock	(333,857)	(432,894)
Proceeds from sale of common stock	113,196	106,814
Dividends paid	(185,835)	(168,597)
Repayment of long-term debt	(2,263)	(21,687)
Other, net	209	1,306
Net cash used in financing activities	(408,550)	(515,058)
Net increase in cash and cash equivalents	412,878	64,430
Cash and cash equivalents at beginning of period	599,264	579,925
Cash and cash equivalents at end of period	1,012,142	644,355
Reconciliation of net earnings to net cash provided by operating activities:
Net earnings	980,971	680,271
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	174,049	160,170
Increase in last-in, first out (LIFO) reserve	10,230	7,664
Retirement contributions paid or payable in common stock	101,071	92,225
Deferred income taxes	65,997	(6,434)
(Gain) loss on disposal and impairment of property, plant and equipment	(1,146)	724
(Gain) loss on investments	(325,171)	24,955
Net amortization of investments	12,280	18,917
Changes in operating assets and liabilities providing (requiring) cash:
Trade receivables	(12,718)	(75,403)
Inventories	101,241	65,914
Other assets	81,108	(30,468)
Accounts payable and accrued expenses	133,002	212,173
Federal and state income taxes	192,131	(49,372)
Other liabilities	(84,689)	3,466
Total adjustments	447,385	424,531
Net cash provided by operating activities	$ 1,428,356	$ 1,104,802

CONDENSED CONSOLIDATED STATEM_5

CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS EQUITY CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Common Stock (Acquired from) Sold to Stockholders	Accumulated Other Comprehensive Earnings (Losses)	Common Stock Related To ESOP
Beginning 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	656,877			680,271		(23,394)
Dividends per share	(168,597)			(168,597)
Contribution of shares to retirement plans	349,424	6,221	261,423		81,780
Acquisition of shares from stockholders	(432,894)				(432,894)
Sale of shares to stockholders	106,814	531	21,632		84,651
Change for ESOP related shares	(402,207)						(402,207)
Cumulative effect of net unrealized gain on equity securities reclassified to retained earnings	0			198,310		(198,310)
Ending Balance at Mar. 31, 2018	11,126,566	740,192	3,422,702	10,754,548	(266,463)	(69,068)	(3,455,345)
Beginning Balance at Dec. 29, 2018	11,823,342	715,445	3,458,004	10,840,654	0	(55,762)	(3,134,999)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive Earnings	1,040,785			980,971		59,814
Dividends per share	(185,835)			(185,835)
Contribution of shares to retirement plans	367,951	5,605	235,017		127,329
Acquisition of shares from stockholders	(333,857)				(333,857)
Sale of shares to stockholders	113,196	621	26,019		86,556
Change for ESOP related shares	(375,184)						(375,184)
Ending Balance at Mar. 30, 2019	$ 12,450,398	$ 721,671	$ 3,719,040	$ 11,635,790	$ (119,972)	$ 4,052	$ (3,510,183)

Condensed Consolidated Statem_6

Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) (Parentheticals) - $ / shares shares in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Statements of Stockholders' Equity (Parenthetical) [Abstract]
Common Stock, Dividends, Per Share, Cash Paid	$ 0.26	$ 0.23
Contribution of shares to retirement plans	8,587	8,440
Acquisition of shares from stockholders	7,802	10,714
Sale of shares to stockholders	2,641	2,590

Basis of Presentation (Notes)

Basis of Presentation (Notes)	3 Months Ended
	Mar. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation [Text Block]	(1) Basis of Presentation The accompanying unaudited condensed consolidated financial statements of Publix Super Markets, Inc. and subsidiaries (Company) have been prepared in accordance with U.S. generally accepted accounting principles (GAAP) and the rules and regulations of the Securities and Exchange Commission (SEC) for interim financial reporting. Accordingly, the accompanying statements do not include all of the information and notes required by GAAP for complete financial statements. In the opinion of management, these statements include all adjustments that are of a normal and recurring nature necessary to present fairly the Company’s financial position and results of operations. Due to the seasonal nature of the Company’s business, the results of operations for the three months ended March 30, 2019 are not necessarily indicative of the results for the entire 2019 fiscal year. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 29, 2018 . The preparation of financial statements in conformity with GAAP 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 (Notes)	3 Months Ended
	Mar. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments [Text Block]	(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). 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 restricted investments in taxable bonds held as collateral. 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 March 30, 2019 and December 29, 2018 : Fair Value Level 1 Level 2 Level 3 (Amounts are in thousands) March 30, 2019 $ 7,316,583 2,635,206 4,681,377 — December 29, 2018 6,577,430 2,372,931 4,204,499 —

Investments (Notes)

Investments (Notes)	3 Months Ended
	Mar. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Investments [Tex Block]	(3) Investments (a) Debt Securities Following is a summary of debt securities as of March 30, 2019 and December 29, 2018 : Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (Amounts are in thousands) March 30, 2019 Tax exempt bonds $ 1,189,068 633 5,227 1,184,474 Taxable bonds 2,982,504 34,563 20,931 2,996,136 Restricted investments 169,529 5,419 — 174,948 $ 4,341,101 40,615 26,158 4,355,558 December 29, 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 The Company maintains restricted investments primarily for the benefit of the Company’s insurance carrier related to self-insurance reserves. These investments are held as collateral and not used for claim payments. The cost and fair value of debt securities by expected maturity as of March 30, 2019 and December 29, 2018 are as follows: March 30, 2019 December 29, 2018 Cost Fair Value Cost Fair Value (Amounts are in thousands) Due in one year or less $ 526,776 525,667 563,272 560,992 Due after one year through five years 3,068,926 3,062,717 2,831,916 2,768,971 Due after five years through ten years 738,951 760,561 542,488 541,852 Due after ten years 6,448 6,613 6,783 6,895 $ 4,341,101 4,355,558 3,944,459 3,878,710 Following is a summary of temporarily impaired debt securities by the time period impaired as of March 30, 2019 and December 29, 2018 : 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) March 30, 2019 Tax exempt bonds $ 2,812 19 1,100,840 5,208 1,103,652 5,227 Taxable bonds 45,531 310 1,364,633 20,621 1,410,164 20,931 $ 48,343 329 2,465,473 25,829 2,513,816 26,158 December 29, 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 There are 310 debt securities contributing to the total unrealized losses of $26,158,000 as of March 30, 2019 . 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 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 of equity securities was $2,961,025,000 and $2,698,720,000 as of March 30, 2019 and December 29, 2018 , respectively. 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. The fair value adjustment includes the cumulative effect of the ASU reclassified to retained earnings as of December 31, 2017. (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. 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 the three months ended March 30, 2019 and March 31, 2018 : Three Months Ended March 30, 2019 March 31, 2018 (Amounts are in thousands) Interest and dividend income $ 42,016 29,093 Net realized gain on sale of investments 4,211 7,024 46,227 36,117 Fair value adjustment, due to net unrealized gain (loss), on equity securities held at end of period 314,348 (25,782 ) Net loss (gain) on sale of equity securities previously recognized through fair value adjustment 6,612 (6,197 ) $ 367,187 4,138

Lessee, Lease Lessee, Lease (No

Lessee, Lease Lessee, Lease (Notes)	3 Months Ended
	Mar. 30, 2019
Lessee Disclosure [Abstract]
Leases of Lessee Disclosure [Text Block]	(4) Leases (a) Lessee In 2019 , the Company adopted the ASU requiring the lease rights and obligations arising from existing and new lease agreements be recognized as assets and liabilities on the balance sheet. The Company adopted the ASU on a modified retrospective basis and elected the transitional provisions eliminating the requirement to restate reporting periods prior to the date of adoption. The Company also elected to not reassess the original conclusions reached regarding lease identification, lease classification and initial direct costs for leases entered into prior to the adoption of the ASU. As of December 30, 2018, the Company recognized its operating lease right-of-use assets and operating lease liabilities on the balance sheet. The adoption of the ASU did not have a material effect on the Company’s results of operations and had no effect on the Company’s cash flows. The Company included finance lease right-of-use assets of $118,879,000 in net property, plant and equipment and finance lease liabilities of $22,998,000 and $84,631,000 in other accrued expenses and other noncurrent liabilities, respectively, on the condensed consolidated balance sheet as of March 30, 2019 . The Company conducts a major portion of its retail operations from leased locations. The Company determines whether a lease exists at inception. Initial lease terms are typically 20 years followed by five year renewal options and may include rent escalation clauses. A renewal option is included in the right-of-use asset and lease liability to the extent it is reasonably certain the option will be exercised. The present value of future payments for each lease is determined by using the Company’s incremental borrowing rate at the time of lease commencement. Additionally, the Company has operating leases for certain transportation and other equipment with initial lease terms ranging up to five years. Operating lease expense primarily represents fixed lease payments for operating leases recognized on a straight-line basis over the applicable lease term. Variable lease expense represents the payment of 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 estimates excess rent, where applicable, based on annual sales projections and uses the straight-line method to amortize the cost to variable lease expense. Lease expense for the three months ended March 30, 2019 was as follows: Three Months Ended March 30, 2019 (Amounts are in thousands) Operating lease expense $ 110,665 Finance lease expense: Amortization of right-of-use assets 1,940 Interest on lease liabilities 648 Variable lease expense 14,417 Sublease rental income (893 ) $ 126,777 Supplemental cash flow information related to leases for the three months ended March 30, 2019 was as follows: Three Months Ended March 30, 2019 (Amounts are in thousands) Operating cash flows from rent paid for operating lease liabilities $ 104,659 Right-of-use assets obtained in exchange for new operating lease liabilities 114,637 The weighted-average remaining lease term and weighted-average discount rate as of March 30, 2019 are as follows: March 30, 2019 Weighted-average remaining lease term: Operating leases 12 years Finance leases 19 years Weighted-average discount rate: Operating leases 3.4 % Finance leases 4.0 % Maturities of lease liabilities as of March 30, 2019 are as follows: Year Operating Leases Finance Leases (Amounts are in thousands) 2019 $ 317,231 24,260 2020 399,526 6,284 2021 365,660 6,284 2022 329,782 6,284 2023 287,010 21,000 Thereafter 1,861,004 72,785 3,560,213 136,897 Less: Imputed interest (697,680 ) (29,268 ) $ 2,862,533 107,629 As of March 30, 2019, the Company has lease agreements that have not yet commenced with fixed lease payments totaling $309,266,000. These leases will commence in future periods with terms ranging up to 20 years.

Lessor, Lease Lessor, Lease (No

Lessor, Lease Lessor, Lease (Notes)	3 Months Ended
	Mar. 30, 2019
Lessor Disclosure [Abstract]
Lessor, Operating Leases [Text Block]	(b) Lessor The Company leases space in owned shopping centers to tenants under noncancelable operating leases. The Company determines whether a lease exists at inception. Initial lease terms are typically five years followed by five year renewal options and may include rent escalation clauses. Lease income primarily represents fixed lease payments received from tenants recognized on a straight-line basis over the applicable lease term. Variable lease income represents the receipt of real estate taxes, insurance, maintenance and, for certain locations, excess rent. Total lease income for the three months ended March 30, 2019 was as follows: Three Months Ended March 30, 2019 (Amounts are in thousands) Lease income $ 35,917 Variable lease income 9,875 $ 45,792 Fixed lease payments to be received for all noncancelable operating leases as of March 30, 2019 are as follows: Year (Amounts are in thousands) 2019 $ 108,010 2020 123,535 2021 97,773 2022 72,916 2023 51,429 Thereafter 172,138 $ 625,801

Consolidation of Joint Ventures

Consolidation of Joint Ventures and Long-Term Debt (Notes)	3 Months Ended
	Mar. 30, 2019
Consolidation Of Joint Ventures And Long Term Debt [Abstract]
Consolidation Of Joint Ventures And Long Term Debt Disclosure [Text Block]	(5) 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. As of March 30, 2019 , the carrying amounts of the assets and liabilities of the consolidated JVs were $144,963,000 and $72,471,000 , respectively. 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. 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 2019 and 2018 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. No loans were assumed during the three months ended March 30, 2019 and March 31, 2018 . 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% .

Retirement Plan (Notes)

Retirement Plan (Notes)	3 Months Ended
	Mar. 30, 2019
Retirement Benefits [Abstract]
Retirement Plan [Text Block]	(6) Retirement Plan The Company has a trusteed, noncontributory Employee Stock Ownership Plan (ESOP) for the benefit of eligible employees. 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 $413,135,000 and $288,580,000 as of March 30, 2019 and December 29, 2018 , respectively. The cost of the shares held by the ESOP totaled $3,097,048,000 and $2,846,419,000 as of March 30, 2019 and December 29, 2018 , 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 condensed consolidated balance sheets and totaled $3,510,183,000 and $3,134,999,000 as of March 30, 2019 and December 29, 2018 , respectively. The fair value of the shares held by the ESOP totaled $8,147,858,000 and $8,061,399,000 as of March 30, 2019 and December 29, 2018 , respectively.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Earnings (Notes)	3 Months Ended
	Mar. 30, 2019
Equity [Abstract]
Comprehensive Income (Loss) Note [Text Block]	(7) Accumulated Other Comprehensive Earnings (Losses) A reconciliation of the changes in accumulated other comprehensive earnings (losses) net of income taxes for the three months ended March 30, 2019 and March 31, 2018 is as follows: Investments Postretirement Benefit Accumulated Other Comprehensive Earnings (Losses) (Amounts are in thousands) 2019 Balances at December 29, 2018 $ (49,033 ) (6,729 ) (55,762 ) Unrealized gain on debt securities 59,521 — 59,521 Net realized loss on debt securities reclassified to investment income 293 — 293 Net other comprehensive earnings 59,814 — 59,814 Balances at March 30, 2019 $ 10,781 (6,729 ) 4,052 2018 Balances at December 30, 2017 $ 168,057 (15,421 ) 152,636 Unrealized loss on debt securities (23,981 ) — (23,981 ) Net realized loss on debt securities reclassified to investment income 22 — 22 Adjustment to postretirement benefit obligation — 565 565 Net other comprehensive (losses) earnings (23,959 ) 565 (23,394 ) Cumulative effect of net unrealized gain on equity securities reclassified to retained earnings (198,310 ) — (198,310 ) Balances at March 31, 2018 $ (54,212 ) (14,856 ) (69,068 )

Subsequent Event (Notes)

Subsequent Event (Notes)	3 Months Ended
	Mar. 30, 2019
Subsequent Events [Abstract]
Subsequent Events [Text Block]	(8) Subsequent Event On April 1, 2019 , the Company declared a quarterly dividend on its common stock of $0.30 per share or $215,500,000 , payable May 1, 2019 to stockholders of record as of the close of business April 15, 2019 .

Basis of Presentation (Policies

Basis of Presentation (Policies)	3 Months Ended
	Mar. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation [Policy Text Block]	(1) Basis of Presentation The accompanying unaudited condensed consolidated financial statements of Publix Super Markets, Inc. and subsidiaries (Company) have been prepared in accordance with U.S. generally accepted accounting principles (GAAP) and the rules and regulations of the Securities and Exchange Commission (SEC) for interim financial reporting. Accordingly, the accompanying statements do not include all of the information and notes required by GAAP for complete financial statements. In the opinion of management, these statements include all adjustments that are of a normal and recurring nature necessary to present fairly the Company’s financial position and results of operations. Due to the seasonal nature of the Company’s business, the results of operations for the three months ended March 30, 2019 are not necessarily indicative of the results for the entire 2019 fiscal year. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 29, 2018 . The preparation of financial statements in conformity with GAAP 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 Instr_2

Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements for Investments [Table Text Block]	Following is a summary of fair value measurements for investments as of March 30, 2019 and December 29, 2018 : Fair Value Level 1 Level 2 Level 3 (Amounts are in thousands) March 30, 2019 $ 7,316,583 2,635,206 4,681,377 — December 29, 2018 6,577,430 2,372,931 4,204,499 —

Investments (Tables)

Investments (Tables)	3 Months Ended
	Mar. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Available For Sale Debt Securities [Table Text Block]	Following is a summary of debt securities as of March 30, 2019 and December 29, 2018 : Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (Amounts are in thousands) March 30, 2019 Tax exempt bonds $ 1,189,068 633 5,227 1,184,474 Taxable bonds 2,982,504 34,563 20,931 2,996,136 Restricted investments 169,529 5,419 — 174,948 $ 4,341,101 40,615 26,158 4,355,558 December 29, 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
Amortized Cost and Fair Value of Available For Sale Debt Securities by Expected Maturity [Table Text Block]	The cost and fair value of debt securities by expected maturity as of March 30, 2019 and December 29, 2018 are as follows: March 30, 2019 December 29, 2018 Cost Fair Value Cost Fair Value (Amounts are in thousands) Due in one year or less $ 526,776 525,667 563,272 560,992 Due after one year through five years 3,068,926 3,062,717 2,831,916 2,768,971 Due after five years through ten years 738,951 760,561 542,488 541,852 Due after ten years 6,448 6,613 6,783 6,895 $ 4,341,101 4,355,558 3,944,459 3,878,710
Temporarily Impaired Available For Sale Debt Securities by Time Period Impaired [Table Text Block]	Following is a summary of temporarily impaired debt securities by the time period impaired as of March 30, 2019 and December 29, 2018 : 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) March 30, 2019 Tax exempt bonds $ 2,812 19 1,100,840 5,208 1,103,652 5,227 Taxable bonds 45,531 310 1,364,633 20,621 1,410,164 20,931 $ 48,343 329 2,465,473 25,829 2,513,816 26,158 December 29, 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
Investment Income [Table Text Block]	Following is a summary of investment income for the three months ended March 30, 2019 and March 31, 2018 : Three Months Ended March 30, 2019 March 31, 2018 (Amounts are in thousands) Interest and dividend income $ 42,016 29,093 Net realized gain on sale of investments 4,211 7,024 46,227 36,117 Fair value adjustment, due to net unrealized gain (loss), on equity securities held at end of period 314,348 (25,782 ) Net loss (gain) on sale of equity securities previously recognized through fair value adjustment 6,612 (6,197 ) $ 367,187 4,138

Lessee, Lease Lessee, Lease (Ta

Lessee, Lease Lessee, Lease (Tables)	3 Months Ended
	Mar. 30, 2019
Lease, Cost [Abstract]
Lease, Cost [Table Text Block]	Lease expense for the three months ended March 30, 2019 was as follows: Three Months Ended March 30, 2019 (Amounts are in thousands) Operating lease expense $ 110,665 Finance lease expense: Amortization of right-of-use assets 1,940 Interest on lease liabilities 648 Variable lease expense 14,417 Sublease rental income (893 ) $ 126,777 Supplemental cash flow information related to leases for the three months ended March 30, 2019 was as follows: Three Months Ended March 30, 2019 (Amounts are in thousands) Operating cash flows from rent paid for operating lease liabilities $ 104,659 Right-of-use assets obtained in exchange for new operating lease liabilities 114,637 The weighted-average remaining lease term and weighted-average discount rate as of March 30, 2019 are as follows: March 30, 2019 Weighted-average remaining lease term: Operating leases 12 years Finance leases 19 years Weighted-average discount rate: Operating leases 3.4 % Finance leases 4.0 %
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	Maturities of operating lease liabilities as of March 30, 2019 are as follows: Year Operating Leases (Amounts are in thousands) 2019 $ 317,231 2020 399,526 2021 365,660 2022 329,782 2023 287,010 Thereafter 1,861,004 3,560,213 Less: Imputed interest (697,680 ) $ 2,862,533
Finance Lease, Liability, Maturity [Table Text Block]	Maturities of finance lease liabilities as of March 30, 2019 are as follows: Year Finance Leases 2019 24,260 2020 6,284 2021 6,284 2022 6,284 2023 21,000 Thereafter 72,785 136,897 Less: Imputed interest (29,268 ) 107,629

Lessor, Lease Lessor, Lease (Ta

Lessor, Lease Lessor, Lease (Tables)	3 Months Ended
	Mar. 30, 2019
Lessor Disclosure [Abstract]
Operating Lease, Lease Income [Table Text Block]	Total lease income for the three months ended March 30, 2019 was as follows: Three Months Ended March 30, 2019 (Amounts are in thousands) Lease income $ 35,917 Variable lease income 9,875 $ 45,792
Lessor, Operating Lease, Payments to be Received, Maturity [Table Text Block]	ixed lease payments to be received for all noncancelable operating leases as of March 30, 2019 are as follows: Year (Amounts are in thousands) 2019 $ 108,010 2020 123,535 2021 97,773 2022 72,916 2023 51,429 Thereafter 172,138 $ 625,801

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Earnings (Tables)	3 Months Ended
	Mar. 30, 2019
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	A reconciliation of the changes in accumulated other comprehensive earnings (losses) net of income taxes for the three months ended March 30, 2019 and March 31, 2018 is as follows: Investments Postretirement Benefit Accumulated Other Comprehensive Earnings (Losses) (Amounts are in thousands) 2019 Balances at December 29, 2018 $ (49,033 ) (6,729 ) (55,762 ) Unrealized gain on debt securities 59,521 — 59,521 Net realized loss on debt securities reclassified to investment income 293 — 293 Net other comprehensive earnings 59,814 — 59,814 Balances at March 30, 2019 $ 10,781 (6,729 ) 4,052 2018 Balances at December 30, 2017 $ 168,057 (15,421 ) 152,636 Unrealized loss on debt securities (23,981 ) — (23,981 ) Net realized loss on debt securities reclassified to investment income 22 — 22 Adjustment to postretirement benefit obligation — 565 565 Net other comprehensive (losses) earnings (23,959 ) 565 (23,394 ) Cumulative effect of net unrealized gain on equity securities reclassified to retained earnings (198,310 ) — (198,310 ) Balances at March 31, 2018 $ (54,212 ) (14,856 ) (69,068 )

Fair Value Measurements for Inv

Fair Value Measurements for Investments (Details) - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 29, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	$ 7,316,583	$ 6,577,430
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	2,635,206	2,372,931
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	4,681,377	4,204,499
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities	$ 0	$ 0

Investments Available for Sale

Investments Available for Sale Securities Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 30, 2019	Dec. 29, 2018
Debt Securities, Available-for-sale [Line Items]
Cost	$ 4,341,101	$ 3,944,459
Debt Securities, Available-for-sale, Unrealized Gain	40,615	2,441
Debt Securities, Available-for-sale, Unrealized Loss	26,158	68,190
Debt Securities, Available-for-sale	4,355,558	3,878,710
Nontaxable Municipal Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Cost	1,189,068	1,256,673
Debt Securities, Available-for-sale, Unrealized Gain	633	184
Debt Securities, Available-for-sale, Unrealized Loss	5,227	12,759
Debt Securities, Available-for-sale	1,184,474	1,244,098
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Cost	2,982,504	2,527,468
Debt Securities, Available-for-sale, Unrealized Gain	34,563	1,737
Debt Securities, Available-for-sale, Unrealized Loss	20,931	55,085
Debt Securities, Available-for-sale	2,996,136	2,474,120
Debt Securities, Restricted [Member]
Debt Securities, Available-for-sale [Line Items]
Cost	169,529	160,318
Debt Securities, Available-for-sale, Unrealized Gain	5,419	520
Debt Securities, Available-for-sale, Unrealized Loss	0	346
Debt Securities, Available-for-sale	$ 174,948	$ 160,492

Amortized Cost and Fair Value o

Amortized Cost and Fair Value of Available for Sale Securities by Expected Maturity (Detail) - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 29, 2018
Cost
Due in one year or less	$ 526,776	$ 563,272
Due after one year through five years	3,068,926	2,831,916
Due after five years through ten years	738,951	542,488
Due after ten years	6,448	6,783
Total	4,341,101	3,944,459
Fair Value
Due in one year or less	525,667	560,992
Due after one year through five years	3,062,717	2,768,971
Due after five years through ten years	760,561	541,852
Due after ten years	6,613	6,895
Total	$ 4,355,558	$ 3,878,710

Temporarily Impaired Available

Temporarily Impaired Available for Sale Securities by Time Period Impaired (Detail) - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 29, 2018
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 48,343	$ 699,216
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	329	6,262
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	2,465,473	2,646,991
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	25,829	61,928
Debt Securities, Available-for-sale, Unrealized Loss Position	2,513,816	3,346,207
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	26,158	68,190
Nontaxable Municipal Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	2,812	25,150
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	19	95
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,100,840	1,182,783
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	5,208	12,664
Debt Securities, Available-for-sale, Unrealized Loss Position	1,103,652	1,207,933
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	5,227	12,759
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	45,531	645,379
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	310	5,821
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,364,633	1,464,208
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	20,621	49,264
Debt Securities, Available-for-sale, Unrealized Loss Position	1,410,164	2,109,587
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	20,931	55,085
Debt Securities, Restricted [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	0	28,687
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	346
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	0	28,687
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 0	$ 346

Investments - Additional Inform

Investments - Additional Information (Detail) $ in Thousands	Mar. 30, 2019USD ($)AFS_security	Dec. 29, 2018USD ($)
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]
Number of debt securities issues contributing to total unrealized loss | AFS_security	310
Total, unrealized Losses | $	$ 26,158	$ 68,190

Investments Equity Securities (

Investments Equity Securities (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 30, 2019	Dec. 29, 2018
Investments, Debt and Equity Securities [Abstract]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 0
Equity Securities [Line Items]
Equity Securities, FV-NI		$ 2,961,025,000	$ 2,698,720,000

Investments Recently Issued Acc

Investments Recently Issued Accounting Standard (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 0
Accounting Standards Update 2016-01 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 198,310

Investments Investment Income (

Investments Investment Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Investment Income, Net [Abstract]
Interest and Dividend Income	$ 42,016	$ 29,093
Net realized gain on sale of investments	4,211	7,024
Investment Income Before Fair Value Adjustment	46,227	36,117
Fair value adjustment, due to net unrealized gain (loss), on equity securities held at end of period	314,348	(25,782)
Net loss (gain) on sale of equity securities previously recognized through fair value adjustment	6,612	(6,197)
Investment Income	$ 367,187	$ 4,138

Lessee, Lease Finance Lease Rig

Lessee, Lease Finance Lease Right of Use Assets and Lease Liabilities (Details)	Mar. 30, 2019USD ($)
Finance Lease Right of Use Assets and Lease Liabilities [Abstract]
Finance Lease, Right-of-Use Asset	$ 118,879,000
Finance Lease, Liability, Current	22,998,000
Finance Lease, Liability, Noncurrent	$ 84,631,000

Lessee, Lease Lessee, Lease - A

Lessee, Lease Lessee, Lease - Additional Information (Details)	3 Months Ended
	Mar. 30, 2019
Lessee, Lease, Description [Line Items]
Lessee, Lease, Existence of Option to Extend [true false]	true
Lessee, Lease, Assumptions and Judgments, Discount Rate, Description	The present value of future payments for each lease is determined by using the Company’s incremental borrowing rate at the time of lease commencement.
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Lease, Term of Contract	20 years
Lessee Lease, Renewal Term	5 years

Lessee, Lease Lease Cost (Detai

Lessee, Lease Lease Cost (Details) $ in Thousands	3 Months Ended
	Mar. 30, 2019USD ($)
Lease, Cost [Abstract]
Operating lease expense	$ 110,665
Amortization of right-of-use assets	1,940
Interest on lease liabilities	648
Variable lease expense	14,417
Sublease rental income	(893)
Lease, Cost	126,777
Rent paid for operating leases	104,659
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 114,637
Operating Lease, Weighted Average Remaining Lease Term	12 years
Finance Lease, Weighted Average Remaining Lease Term	19 years
Operating Lease, Weighted Average Discount Rate, Percent	3.40%
Finance Lease, Weighted Average Discount Rate, Percent	4.00%

Lessee, Lease Maturities of Ope

Lessee, Lease Maturities of Operting Lease Liabilities (Details) $ in Thousands	Mar. 30, 2019USD ($)
Operating Lease Liabilities, Payments Due [Abstract]
2019	$ 317,231
2020	399,526
2021	365,660
2022	329,782
2023	287,010
Thereafter	1,861,004
Total Payments Due	3,560,213
Less: Imputed Interest	(697,680)
Operating Lease, Liability	$ 2,862,533

Lessee, Lease Maturities of Fin

Lessee, Lease Maturities of Finance Lease Liabilities (Details) $ in Thousands	Mar. 30, 2019USD ($)
Finance Lease Liabilities, Payments, Due [Abstract]
2019	$ 24,260
2020	6,284
2021	6,284
2022	6,284
2023	21,000
Thereafter	72,785
Total Payments Due	136,897
Less: Imputed Interest	(29,268)
Finance Lease, Liability	$ 107,629

Lessee, Lease Lessee, Lease, No

Lessee, Lease Lessee, Lease, Not Yet Commenced (Details)	3 Months Ended
	Mar. 30, 2019USD ($)
Lessee, Lease, Description [Line Items]
Lessee Lease, Lease Not Yet Commenced	$ 309,266,000
Lessee, Lease Not Yet Commenced Description	As of March 30, 2019 the Company has operating leases not yet commenced.
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lessee Lease Not Yet Commenced Term of Contract	20 years

Lessor, Lease Lessor, Lease Inc

Lessor, Lease Lessor, Lease Income (Details) $ in Thousands	3 Months Ended
	Mar. 30, 2019USD ($)
Operating Leases, Lease Income [Abstract]
Operating Lease, Lease Income, Lease Payments	$ 35,917
Operating Lease, Variable Lease Income	9,875
Operating Lease, Lease Income	$ 45,792

Lessor, Lease Lessor, Fixed Lea

Lessor, Lease Lessor, Fixed Lease Payments to be Received (Details) $ in Thousands	Mar. 30, 2019USD ($)
Lessor, Operating Lease, Payments, Fiscal Year Maturity [Abstract]
2019	$ 108,010
2020	123,535
2021	97,773
2022	72,916
2013	51,429
Thereafter	172,138
Total	$ 625,801

Consolidation of Joint Ventur_2

Consolidation of Joint Ventures and Long-Term Debt Joint Venture - Additional Information (Details) - USD ($)	Mar. 30, 2019	Dec. 29, 2018
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract]
Variable Interest Entity, Consolidated, Carrying Amount, Assets	$ 144,963,000	$ 144,197,000
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	$ 72,471,000	$ 71,342,000

Consolidation of Joint Ventur_3

Consolidation of Joint Ventures and Long-Term Debt Long-Term Debt Assumptions, Maturities and Interest Rates (Details) - USD ($)	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Debt Instrument [Line Items]
Loans Assumed	$ 0	$ 0
JV Loans [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument Maturity Month And Year	June 2020
Debt Instrument, Basis Spread on Variable Rate	1.75%
JV Loans [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument Maturity Month And Year	April 2027
Debt Instrument, Basis Spread on Variable Rate	2.50%
Shopping Center Loans [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument Maturity Month And Year	December 2020
Debt Instrument, Interest Rate, Stated Percentage	3.70%
Shopping Center Loans [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument Maturity Month And Year	January 2027
Debt Instrument, Interest Rate, Stated Percentage	7.50%

Retirement Plan - Additional In

Retirement Plan - Additional Information (Detail) - USD ($)	Mar. 30, 2019	Dec. 29, 2018
Retirement Benefits [Abstract]
Distributed shares subject to put option, fair value	$ 413,135,000	$ 288,580,000
ESOP, shares cost	3,097,048,000	2,846,419,000
Common stock related to ESOP	3,510,183,000	3,134,999,000
ESOP shares, fair value	$ 8,147,858,000	$ 8,061,399,000

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Earnings (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances at Beginning of Period	$ (55,762)	$ 152,636
Unrealized gain (loss) on debt securities in 2019 and 2018, respectively.	59,521	(23,981)
Net realized loss on debt securities reclassified to investment income in 2019 and 2018.	293	22
Adjustment to postretirement benefit obligation	0	565
Net other comprehensive earnings (losses)	59,814	(23,394)
Cumulative effect of net unrealized gain on equity securities reclassified to retained earnings		(198,310)
Balances at End of Period	4,052	(69,068)
AFS Securities [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances at Beginning of Period	(49,033)	168,057
Unrealized gain (loss) on debt securities in 2019 and 2018, respectively.	59,521	(23,981)
Net realized loss on debt securities reclassified to investment income in 2019 and 2018.	293	22
Net other comprehensive earnings (losses)	59,814	(23,959)
Cumulative effect of net unrealized gain on equity securities reclassified to retained earnings		(198,310)
Balances at End of Period	10,781	(54,212)
Postretirement Benefits [Member}
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances at Beginning of Period	(6,729)	(15,421)
Adjustment to postretirement benefit obligation	0	565
Net other comprehensive earnings (losses)	0	565
Balances at End of Period	$ (6,729)	$ (14,856)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Earnings Change in Accounting Principle (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)
Change In Accounting Principle [Abstract]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 0

Subsequent Event (Details)

Subsequent Event (Details) - Subsequent Event [Member] - USD ($)	May 01, 2019	Apr. 15, 2019	Apr. 01, 2019
Subsequent Event [Line Items]
Common Stock, Dividends, Per Share, Declared			$ 0.30
Dividends Payable, Date Declared			Apr. 1, 2019
Dividends Payable, Date to be Paid	May 1, 2019
Dividends Payable, Date of Record		Apr. 15, 2019
Dividends, Common Stock, Cash			$ 215,500,000