Profit sharing contribution paid in stock.

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- Definition

Share based compensation arrangement by share based payment award equity instruments other than options granted and issued in period.

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Share based compensation arrangement by share based payment award equity instruments other than options issued and corrections in period.

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- Definition

Share based compensation arrangement by share based payment award equity instruments other than options withheld for taxes in period.

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- Definition

Treasury Stock Shares Acquired Not Reflected In Equity

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Other than shares newly issued, the number of additional shares issued (for example, a stock split) or canceled (for example, to correct a share issuance), during the period under the plan.

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Number of shares of stock issued during the period pursuant to acquisitions.

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Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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Number of shares that have been repurchased during the period and are being held in treasury.

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Stockholders' Equity (Deficit) - Summary of Changes in Common Stock and Common Stock in Treasury (Detail) - shares		3 Months Ended	12 Months Ended
	Sep. 26, 2018	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of shares, beginning of year		230,080,944	230,080,944	227,638,738	225,625,636
Restricted stock shares forfeited (in shares)			(86,518)	(184,235)	(89,699)
Shares issued for vested restricted stock units			151,280	607,231	179,826
Other activity (in shares)			(25,233)	0	0
Number of shares issued, end of year			231,619,037	230,080,944	227,638,738
Number of shares held, beginning of year		61,485,423	61,485,423	34,156,355	29,612,337
Number of shares held, end of year			75,964,667	61,485,423	34,156,355
Number of common stock outstanding, end of year			155,654,370	168,595,521	193,482,383
Common Stock in Treasury
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Repurchase of common stock (in shares)			14,826,924	27,320,816	4,680,313
Profit sharing contribution paid in stock (in shares)			(538,524)	(502,519)	(830,613)
Restricted stock shares, forfeited			0	0	(1,813)
Shares withheld for taxes			190,844	510,771	696,131
Shares repurchased not reflected			71,530
Omnibus Incentive Plan and 2005 Contingent Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares issued for awards			569,960	480,283	481,834
Number of units granted (in shares)			571,438	480,283	481,834
Shares granted and issued under the Omnibus Incentive Plan and Directors Stock Plan to Directors			10,841	15,768	21,537
Shares withheld for taxes			94,624	101,767	0
2014 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of units granted (in shares)			1,478
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares issued as part of acquisition	20,000		20,000	0	0
Restricted Stock \| Omnibus Incentive Plan and 2005 Contingent Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Restricted stock shares forfeited (in shares)			(91,542)	(184,235)	(87,886)
Restricted Stock \| 2014 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Restricted stock shares forfeited (in shares)			(5,024)
2012 President and COO Four-year Incentive Compensation
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares issued for awards			0	0	325,000
2014 Special PSU Awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares issued for awards			658,783	749,653	0
Shares issued for vested restricted stock units		658,783
2015 Three-year PSU Awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares issued for awards			129,139	0	0
2014 Three-year PSU Awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares issued for awards			0	636,723	0
2013 Three-year PSU Awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares issued for awards			0	0	1,074,017
SLO Awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of units granted (in shares)			109,841	136,783	20,587
SLO Awards \| Omnibus Incentive Plan and 2005 Contingent Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Restricted stock shares forfeited (in shares)			(817)	(3,639)	0