Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Schedule of Property Plant and Equipment, Estimated Useful Life

Depreciation is calculated using the straight-line method typically over the following range of estimated useful lives of the assets:

Asset	Useful Life
Buildings	15 to 40 years
Machinery and equipment	3 to 20 years
Leasehold improvements	Over the shorter of their estimated useful lives or the terms of the applicable lease agreements

Property, plant and equipment as of December 31, 2019 and 2018 consisted of the following:

	December 31
	2019			2018
	(In thousands)
Land	$	157,100		$	162,326
Buildings	648,595			642,986
Leasehold improvements	71,577			84,320
Machinery and equipment	1,781,324			1,873,505
Construction in progress	31,711			45,349
	2,690,307			2,808,486
Less accumulated depreciation	(1,869,941		)	(1,802,304		)
Total	$	820,366		$	1,006,182

Schedule of Intangible and Other Assets, Estimated Useful Life

Identifiable intangible assets, other than indefinite-lived trademarks, are typically amortized over the following range of estimated useful lives:

Asset	Useful Life
Customer relationships	5 to 15 years
Finite-lived trademarks	5 to 10 years
Customer supply contracts	Over the shorter of the estimated useful lives or the terms of the agreements
Noncompetition agreements	Over the shorter of the estimated useful lives or the terms of the agreements

Schedule of Pro-Forma and Restrospective Effects on Consolidated Statement of Operations

The effect of the retrospective presentation change related to the net periodic cost for pension and postretirement benefits on our Consolidated Statements of Operations was as follows (in thousands):

	Twelve Months Ended December 31, 2017
	As Previously Reported			Adjustment for Adoption of ASU 2017-07			As Revised
Cost of sales	$	5,977,348		$	(390	)	$	5,976,958
Gross profit	1,817,677			390			1,818,067
Selling and distribution	1,346,948			(531		)	1,346,417
General and administrative	311,176			(3,383		)	307,793
Total operating costs and expenses	1,734,415			(3,914		)	1,730,501
Operating income	83,262			4,304			87,566
Other (income) expense, net	(2,942		)	4,304			1,362

The following table summarizes the impact of adopting ASU 2014-09 on our Consolidated Statements of Operations for the year ended December 31, 2019 (in thousands):

	Year Ended December 31, 2019
	As Reported		As Without Adoption of ASU 2014-09		Impact of Adoption of ASU 2014-09
Net sales	$	7,328,663	$	6,948,368	$	380,295
Cost of sales	5,888,931		5,508,636		380,295
Gross profit	$	1,439,732	$	1,439,732	$	—