Graybar Electric (GRAYBAR) 10-K 10 Mar 21 2020 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Mar. 01, 2021	Jun. 30, 2020
Document and Entity Information [Abstract]
Document Type	10-K
Document Annual Report	true
Current Fiscal Year End Date	--12-31
Document Period End Date	Dec. 31, 2020
Document Transition Report	false
Entity File Number	000-00255
Entity Registrant Name	GRAYBAR ELECTRIC COMPANY, INC.
Entity Incorporation, State or Country Code	NY
Entity Tax Identification Number	13-0794380
Entity Address, Address Line One	34 North Meramec Avenue
Entity Address, City or Town	St. Louis
Entity Address, State or Province	MO
Entity Address, Postal Zip Code	63105
City Area Code	314
Local Phone Number	573 - 9200
Title of 12(g) Security	Common Stock - Par Value $1.00 Per Share with a
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation	false
Entity Shell Company	false
Entity Public Float			$ 0
Entity Common Stock, Shares Outstanding		22,909,022
Documents Incorporated by Reference	Portions of the documents listed below have been incorporated by reference into the indicated Part of this Annual Report on Form 10-K: Information Statement relating to the 2020 Annual Meeting of Shareholders – Part III, Items 10-14
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Central Index Key	0000205402

Consolidated Statements Of Inco

Consolidated Statements Of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Consolidated Statements Of Income [Abstract]
Net sales	$ 7,265.7	$ 7,523.9	$ 7,202.5
Cost of merchandise sold	(5,896.2)	(6,094.9)	(5,821.6)
Gross Margin	1,369.5	1,429	1,380.9
Selling, general and administrative expenses	(1,098.9)	(1,159.9)	(1,125)
Depreciation and amortization	(52.8)	(50.5)	(49.6)
Other income, net	7	5	3.4
Income from Operations	224.8	223.6	209.7
Non-operating expenses	(58.5)	(23.7)	(30.6)
Income before Provision for Income Taxes	166.3	199.9	179.1
Provision for income taxes	(44.2)	(55)	(35.4)
Net Income	122.1	144.9	143.7
Net income attributable to noncontrolling interests	(0.3)	(0.4)	(0.4)
Net Income attributable to Graybar Electric Company, Inc.	$ 121.8	$ 144.5	$ 143.3
Net Income attributable to Graybar Electric Company, Inc. per share of Common Stock	$ 5.38	$ 6.41	$ 6.37

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Consolidated Statements Of Comprehensive Income [Abstract]
Net Income	$ 122.1	$ 144.9	$ 143.7
Other Comprehensive Income (Loss)
Foreign currency translation	2.8	4.8	(8.1)
Pension and postretirement benefits liability adjustments (net of tax of $(0.5), $5.2, and $(6.1), respectively)	1.3	(15)	17.6
Total Other Comprehensive Income (Loss)	4.1	(10.2)	9.5
Comprehensive Income	126.2	134.7	153.2
Less: Comprehensive income attributable to noncontrolling interests, net of tax	0.5	0.5	0.1
Comprehensive Income attributable to Graybar Electric Company, Inc.	$ 125.7	$ 134.2	$ 153.1

Consolidated Statements Of Co_2

Consolidated Statements Of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Consolidated Statements Of Comprehensive Income [Abstract]
Pension and postretirement benefits liability adjustment (tax)	$ (0.5)	$ 5.2	$ (6.1)

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Current Assets
Cash and cash equivalents	$ 131.2	$ 60.8
Trade receivables (less allowances of $6.9 and $6.2, respectively)	1,109	1,096.6
Merchandise inventory	588.5	654.2
Other current assets	56.6	51.7
Total Current Assets	1,885.3	1,863.3
Property, at cost
Land	78.9	79.6
Buildings	504.5	505.5
Furniture and fixtures	255.7	250.4
Software	153.5	168.6
Finance leases	14.6	18.3
Total Property, at cost	1,007.2	1,022.4
Accumulated depreciation and amortization	(600.6)	(597.2)
Net Property	406.6	425.2
Operating Lease Right-of-use Assets	118.8	117.5
Other Non-current Assets	140.5	111.7
Total Assets	2,551.2	2,517.7
Current Liabilities
Short-term borrowings	50	138
Current portion of long-term debt	2.3	3.8
Trade accounts payable	884.1	832.3
Accrued payroll and benefit costs	121.7	151.1
Other accrued taxes	44.2	24.7
Current operating lease liabilities	31.2	28.6
Other current liabilities	104.4	101.1
Total Current Liabilities	1,237.9	1,279.6
Postretirement Benefits Liability	74.1	69.4
Pension Liability	197.9	164.6
Long-term Debt	5.7	7.8
Non-current Operating Lease Liabilities	95.9	96.2
Other Non-current Liabilities	4.7	2.3
Total Liabilities	1,616.2	1,619.9
SHAREHOLDERS’ EQUITY
Outstanding Common Stock	452.1	449.5
Advance Payments on Subscriptions to Common Stock	21.1	19.9
Less subscriptions receivable	(21.1)	(19.9)
Retained Earnings	725.1	694
Accumulated Other Comprehensive Loss	(246.7)	(250.6)
Total Graybar Electric Company, Inc. Shareholders’ Equity	930.5	892.9
Noncontrolling Interests	4.5	4.9
Total Shareholders’ Equity	935	897.8
Total Liabilities and Shareholders’ Equity	$ 2,551.2	$ 2,517.7

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Consolidated Balance Sheets [Abstract]
Allowance for doubtful accounts	$ 6.9	$ 6.2
Common stock stated value per share	$ 20	$ 20
Authorized	50,000,000	50,000,000
Issued to voting trustees	18,755,472	18,665,064
Issued to shareholders	3,905,994	3,872,159
In treasury, at cost	(57,047)	(62,700)
Outstanding Common Stock	22,604,419	22,474,523
Common shares subscribed	1,052,817	997,275
Less subscripton receivable	(1,052,817)	(997,275)

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash Flows from Operating Activities
Net Income	$ 122.1	$ 144.9	$ 143.7
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	52.8	50.5	49.6
Non-cash operating lease expense	33.8	30.1
Deferred income taxes	(10.2)	(3.7)	3.4
Net gains on disposal of assets	(3)	(1.5)
Losses on impairment of assets	0.3	0.3	0.3
Non-cash pension settlement charge	27.7
Net income attributable to noncontrolling interests	(0.3)	(0.4)	(0.4)
Changes in assets and liabilities:
Trade receivables	(5.2)	92.2	(125.4)
Merchandise inventory	68	4.5	(101.9)
Other current assets	(4.9)	2.4	2.1
Other non-current assets	(1.1)	(1.7)	(9)
Trade accounts payable	48.1	(62.8)	59.7
Accrued payroll and benefit costs	(30.2)	(7.1)	38.8
Other current liabilities	25.1	5.8	5.6
Other non-current liabilities	(21.3)	(4.1)	(24.4)
Total adjustments to net income	179.6	104.5	(101.6)
Net cash provided by operating activities	301.7	249.4	42.1
Cash Flows from Investing Activities
Proceeds from disposal of property	7.9	3.7	0.7
Capital expenditures for property	(31.1)	(43.1)	(43)
Acquisition of business, net of cash acquired	(27.2)
Net cash used by investing activities	(50.4)	(39.4)	(42.3)
Cash Flows from Financing Activities
Net decrease in short-term borrowings	(88)	(97)	65.4
Principal payments under finance arrangements	(3.9)	(3.7)	(4)
Sale of common stock	19.1	18.5	17.8
Purchases of common stock	(16.5)	(19.2)	(15.7)
Sales of noncontrolling interests’ common stock		0.8
Purchases of noncontrolling interests’ common stock	(0.9)	(0.3)	(0.3)
Dividends paid	(90.7)	(107.2)	(46.9)
Net cash used by financing activities	(180.9)	(208.1)	16.3
Net Increase in Cash	70.4	1.9	16.1
Cash, Beginning of Year	60.8	58.9	42.8
Cash, End of Period	131.2	60.8	58.9
Non-cash Investing and Financing Activities:
Acquisitions of equipment under finance leases	0.3	2	3.1
Acquisitions of assets under operating leases	35.3	55.9
Acquisition of software and maintenance under financing arrangement			5
Cash Paid During the Year for:
Interest, net of amounts capitalized	3.8	6.1	6.3
Income taxes, net of refunds	$ 55.3	$ 60.7	$ 38.3

Consolidated Statements Of Chan

Consolidated Statements Of Changes in Shareholders’ Equity - USD ($) $ in Millions	Common Stock Including Additional Paid in Capital	Retained EarningsCumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interests	Cumulative Effect, Period of Adoption, Adjustment [Member]	Total
Balance at Dec. 31, 2017	$ 387.7		$ 619.9	$ (250.1)	$ 4.1		$ 761.6
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Net income			143.3		0.4		143.7
Other comprehensive income (loss)				9.8	(0.3)		9.5
Stock issued	17.8						17.8
Stock purchased	(15.7)				(0.3)		(16)
Dividends declared	39		(85.9)				(46.9)
Balance (Accounting Standards Update 2014-09 [Member]) at Dec. 31, 2018		$ 0.8				$ 0.8
Balance at Dec. 31, 2018	428.8		678.1	(240.3)	3.9		870.5
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Increase in retained earnings							678.1
Net income			144.5		0.4		144.9
Other comprehensive income (loss)				(10.3)	0.1		(10.2)
Stock issued	18.5				0.8		19.3
Stock purchased	(19.2)				(0.3)		(19.5)
Dividends declared	21.4		(128.6)				(107.2)
Balance at Dec. 31, 2019	449.5		694	(250.6)	4.9		897.8
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Increase in retained earnings							694
Net income			121.8		0.3		122.1
Other comprehensive income (loss)				3.9	0.2		4.1
Stock issued	19.1						19.1
Stock purchased	(16.5)				(0.9)		(17.4)
Dividends declared			(90.7)				(90.7)
Balance at Dec. 31, 2020	$ 452.1		$ 725.1	$ (246.7)	$ 4.5		935
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Increase in retained earnings							$ 725.1

Description Of The Business

Description Of The Business	12 Months Ended
	Dec. 31, 2020
Description Of The Business [Abstract]
Description Of The Business	1. DESCRIPTION OF THE BUSINESS Graybar Electric Company, Inc. (“Graybar”, “Company”, "we", "our", or "us") is a New York corporation, incorporated in 1925. We are engaged in the distribution of electrical and communications and data networking products and are a provider of related supply chain management and logistics services. We primarily serve customers in the construction, commercial, institutional and government ("CIG"), and industrial & utility vertical markets, with products and services that support new construction, infrastructure updates, building renovation, facility maintenance, repair and operations ("MRO"), and original equipment manufacturers ("OEM"). We purchase all of the products we sell from others, and we neither manufacture nor contract to manufacture any products we sell. Our business activity is primarily based in the United States (“U.S.”). We also have subsidiary operations with distribution facilities in Canada and Puerto Rico.

Summary Of Significant Accounti

Summary Of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2020
Summary Of Significant Accounting Policies [Abstract]
Summary Of Significant Accounting Policies	2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Our accounting policies conform to generally accepted accounting principles in the U.S. ("GAAP”) and are applied on a consistent basis among all years presented. Significant accounting policies are described below. Principles of Consolidation The consolidated financial statements include the accounts of Graybar and its subsidiary companies. All material intercompany balances and transactions have been eliminated. The ownership interests that are held by owners other than the Company are in subsidiaries owned by the Company and are accounted for and reported as noncontrolling interests. Estimates The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and the disclosure of contingent assets and liabilities. Actual results could differ from these estimates. Subsequent Events We have evaluated subsequent events through the time of the filing of this Annual Report on Form 10-K with the Commission. No material subsequent events have occurred since December 31, 2020 that require recognition or disclosure in our financial statements. Revenue Recognition Sales revenue is recognized when performance obligations are satisfied, which is typically upon delivery of the product to the customer. Sometimes product is purchased from the manufacturer and drop-shipped to the customer. We generally take control of the goods when shipped by the manufacturer and then recognize revenue when control of the product transfers to the customer. Revenues recognized are primarily for product sales, but may also include freight and handling charges. Our standard warehouse shipping terms are FOB shipping point, under which control passes to the customer at the time of shipment. We also earn revenue for professional services, general contracting services, and storage services. Such service revenue represented less than 1 % of gross sales for the years ended December 31, 2020, 2019, and 2018. Revenue is reported net of all taxes, primarily sales tax, assessed by governmental authorities as a result of revenue-producing transactions. Outgoing Freight Expenses We record 95 % of outgoing freight expenses as a component of selling, general and administrative expenses. Total outgoing freight expenses were $ 68.8 million, $ 68.5 million, and $ 65.7 million for the years ended December 31, 2020, 2019, and 2018, respectively. Cash and Cash Equivalents We account for cash on hand, deposits in banks, and other short-term, highly liquid investments with an original maturity of three months or less as cash and cash equivalents. Allowance for Credit Losses We perform ongoing credit evaluations of our customers, and a significant portion of our trade receivables is secured by mechanic’s lien or payment bond rights. We maintain allowances to reflect the expected uncollectability of trade receivables based on past collection history pooled on the aging of the receivables, specific risks identified in the receivables portfolio based on current conditions, and expected future economic conditions when necessary. Although actual credit losses have historically been within management’s expectations, additional allowances may be required if the financial condition of our customers were to deteriorate. Merchandise Inventory Our inventory, comprised entirely of finished goods, is stated at the lower of cost (generally determined using the last-in, first-out (“LIFO”) cost method) or market. LIFO accounting is a method of accounting that, compared with other inventory accounting methods, generally provides better matching of current costs with current sales. We make provisions for obsolete or excess inventories as necessary to reflect reductions in inventory value. Vendor Allowances Our agreements with many of our suppliers provide for us to earn volume incentives based on purchases during the agreement period. Based on the provisions of our vendor agreements, we develop vendor accrual rates by estimating our performance under the agreements and the amounts that will be earned. We perform analyses and review historical trends to ensure the deferred amounts earned are appropriately recorded. Certain vendor agreements contain purchase volume incentives that provide for increased funding when graduated purchase volumes are met. Amounts accrued throughout the year are based on estimates of future activity levels, and could be materially impacted if actual purchase volumes differ. Changes in the estimated amount of incentives are treated as changes in estimate and are recognized in earnings in the period in which the change in estimate occurs. In the event that the operating performance of our suppliers were to decline, however, there can be no assurance that amounts earned would be paid or that the volume incentives would continue to be included in future agreements. Property and Depreciation Property, plant and equipment are recorded at cost. Depreciation is expensed on a straight-line basis over the estimated useful lives of the related assets. Interest costs incurred to finance expenditures for major long-term construction projects are capitalized as part of the asset's historical cost and included in property, plant and equipment, then depreciated over the useful life of the asset. Leasehold improvements are amortized over the term of the lease or the estimated useful life of the improvement, whichever is shorter. Expenditures for maintenance and repairs are charged to expense when incurred, while the costs of significant improvements, which extend the useful life of the underlying asset, are capitalized. Fair Value We endeavor to utilize the best available information in measuring fair value. GAAP has established a fair value hierarchy, which prioritizes the inputs used in measuring fair value. The tiers in the hierarchy include: Level 1, defined as observable inputs such as quoted prices in active markets; Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3, defined as unobservable inputs for which little or no market data exists, therefore requiring an entity to develop its own data inputs and assumptions. We have used fair value measurements to value our pension plan assets. Foreign Currency Exchange Rate The functional currency for our Canadian subsidiary is the Canadian dollar. Accordingly, its balance sheet amounts are translated at the exchange rates in effect at the end of each reporting period and its statements of income amounts are translated at the average rates of exchange prevailing during the current period. Currency translation adjustments are included in accumulated other comprehensive loss. Goodwill Our goodwill is not amortized, but rather tested annually for impairment. Goodwill is reviewed annually in the fourth quarter and when circumstances or other events might indicate that impairment may have occurred. We first perform a qualitative assessment of goodwill impairment. The qualitative assessment considers several factors including the excess fair value over carrying value as of the last quantitative impairment test, the length of time since the last fair value measurement, the current carrying value, market conditions, actual performance compared to forecasted performance, and the current business outlook. If the qualitative assessment indicates that it is more likely than not that goodwill is impaired, the reporting unit is then quantitatively tested for impairment. If a quantitative assessment is required, the fair value is determined using a variety of assumptions including estimated future cash flows of the reporting unit using applicable discount rates. Definite Lived Intangible Assets The cost of intangible assets with determinable useful lives is amortized to reflect the pattern of economic benefits consumed, either on a straight-line or accelerated basis over the estimated periods benefited. Customer relationships, trade names and other non-contractual intangible assets with determinable lives are amortized over periods generally ranging from 3 to 20 years. Intangible assets are tested for impairment if events or circumstances occur indicating that the respective asset might be impaired. Income Taxes We recognize deferred tax assets and liabilities to reflect the future tax consequences of events that have been recognized in the financial statements or tax returns. A deferred tax asset or liability results from the temporary difference between an item’s carrying value as reflected in the financial statements and its tax basis, and is calculated using enacted applicable tax rates. We assess the likelihood that our deferred tax assets will be recovered from future taxable income and, to the extent we believe that recovery is not likely, a valuation allowance is established. Changes in the valuation allowance, when recorded, are included in the provision for income taxes in the consolidated financial statements. We classify interest expense and penalties as part of our provision for income taxes based upon applicable federal and state interest/underpayment percentages. We assess uncertainty regarding tax positions taken in previously filed returns and record reserves in accordance with the guidance under Accounting Standards Codification ("ASC") 740-10, "Accounting for Uncertainty in Income Taxes". Other Postretirement Benefits We account for postretirement benefits other than pension benefits by accruing the costs of benefits to be provided over the eligible employees’ periods of active service. These costs are determined on an actuarial basis. Our consolidated balance sheets reflect the funded status of postretirement benefits. Pension Plan We sponsor a noncontributory defined benefit pension plan accounted for by accruing the cost to provide the benefits over the eligible employees’ periods of active service. These costs are determined on an actuarial basis. Our consolidated balance sheets reflect the funded status of the defined benefit pension plan. Leases We determine if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use (“ROU”) assets, current operating lease liabilities, and non-current operating lease liabilities on our consolidated balance sheets. Amounts related to finance leases are included in property and equipment, current portion of long-term debt, and long-term debt on our consolidated balance sheets. ROU assets and lease liabilities are recognized and measured on the date the underlying asset is made available to us. Operating lease ROU assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. We use our incremental borrowing rate based on the information available at the commencement date in determining the present value of future payments. The operating lease ROU asset also includes any lease payments made and excludes lease incentives. Our lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. Operating lease expense for minimum lease payments is recognized on a straight-line basis over the lease term. For certain leases, such as real estate and information technology (IT) equipment, we account for the lease and non-lease components as a single lease component. For all other leases, we account for the lease and non-lease components separately. We have elected as an accounting policy not to apply the recognition requirements for short-term leases. Therefore, leases with a term of twelve months or less are not recorded on the consolidated balance sheets. Lease expenses associated with short-term leases are immaterial and are recorded in the consolidated statements of income in selling, general and administrative expenses. Additionally, for certain vehicle leases, we apply a portfolio approach to account for the operating lease ROU assets and liabilities. Non-Operating Expenses Non-operating expenses are comprised of interest expense, net and non-service cost components of the net periodic benefit cost for the pension and other postretirement benefit plans. The non-service cost components include interest cost, expected return on plan assets, amortization of net actuarial gains/losses, amortization of prior service costs/gains, and charges due to settlement of certain plan liabilities. New Accounting Standards In June 2016, the FASB issued Accounting Standards Update (“ASU” or “Update”) 2016-13, "Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments", which introduced new guidance for the accounting for credit losses on certain financial instruments. The amendments in this ASU were effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years and required a cumulative-effect adjustment to the balance sheet as of the beginning of the first reporting period in which the guidance is effective. Periods presented prior to the adoption date are not adjusted. We adopted this Update as of January 1, 2020. We determined that our trade receivables are financial instruments subject to this Update. We have evaluated the accounting policies applicable to our allowance for doubtful accounts and have developed new methods to include three components into our allowance to comply with requirements of the ASU: 1) a reserve derived from historical loss rates based upon the aging of our trade receivables, 2) a reserve based upon specifically-identified trade receivables in our portfolio that are considered higher risk based on current conditions, and 3) an additional reserve, as necessary, to consider the impact of future economic conditions. The adoption of this Update did not have a material impact on our consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, "Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement" ("ASU 2018-13") that makes minor changes to the disclosure requirements on fair value measurements in Topic 820. The guidance eliminates requirements for certain disclosures that are no longer considered cost beneficial and adds new disclosure requirements that the FASB considers pertinent. We adopted this Update as of January 1, 2020. The adoption did not have a material impact on our consolidated financial statements. In August 2018, the FASB issued ASU 2018-15, "Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract" ("ASU 2018-15") requiring a customer in a cloud computing arrangement that is a service contract to follow the internal use software guidance in ASC 350-40 to determine which implementation costs to capitalize as assets. Capitalized implementation costs related to a hosting arrangement that is a service contract will be amortized over the term of the hosting arrangement, beginning when the module or component of the hosting arrangement is ready for its intended use. We adopted this Update as of January 1, 2020. The adoption did not have a material impact on our consolidated financial statements. In August 2018, the FASB issued ASU 2018-14, "Compensation-Retirement Benefits-Defined Benefit Plans-General (Subtopic 715-20): Disclosure Framework-Changes to the Disclosure Requirements for Defined Benefit Plans" ("ASU 2018-14") that makes minor changes to the disclosure requirements for employers that sponsor defined benefit pension and/or other postretirement benefit plans. The guidance eliminates requirements for certain disclosures that are no longer considered cost beneficial and adds new disclosure requirements that the FASB considers pertinent. ASU 2018-14 is effective for fiscal years ending after December 15, 2020 for public entities. Early adoption is permitted. We adopted this Update as of December 31, 2020. The adoption did not have a material impact on our consolidated financial statements. In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting” (“ASU 2020-04”) that provides temporary relief to the GAAP guidance on contract modifications and hedge accounting to ease the financial reporting burdens of the expected market transition from LIBOR and other interbank offered rates to alternative rates. This Update is effective for all entities as of March 12, 2020 through December 31, 2022. The guidance on contract modifications, which is applicable to Graybar, can be applied prospectively from any date beginning March 12, 2020 and may also be applied to modifications of existing contracts made earlier in the interim period that includes March 12, 2020. We have evaluated the impact of the adoption of the Update on our contracts and our consolidated financial statements. We do not engage in hedging transactions and we anticipate that our few impacted contracts will continue to use LIBOR until December 31, 2021. As such, we currently believe this Update will not have a material impact on our contracts and our consolidated financial statements.

Revenue

Revenue	12 Months Ended
	Dec. 31, 2020
Revenue [Abstract]
Revenue	3. REVENUE On January 1, 2018, we adopted ASC Topic 606, “Revenue from Contracts with Customers” ("ASC Topic 606") using the modified retrospective method applied to those contracts which were not completed as of January 1, 2018. Results for reporting periods beginning after January 1, 2018 are presented under ASC Topic 606, while prior period amounts are not adjusted and continue to be reported in accordance with our historic accounting under ASC Topic 605, "Revenue Recognition" ("ASC Topic 605"). We recorded an increase to opening retained earnings of $ 0.8 million (net of tax of $ 0.3 million) as of January 1, 2018 due to the cumulative impact of adopting ASC Topic 606, with the impact primarily related to the recognition of bill and hold transactions that were deferred under ASC Topic 605. The impact to net sales as a result of applying ASC Topic 606 for the year ended December 31, 2018 was an increase of $ 0.2 million. In accordance with the new revenue standard requirement, the disclosure impact of adoption on our consolidated statement of income for the year ended December 31, 2018 and the consolidated balance sheet as of December 31, 2018 was as follows: Consolidated Statements of Income For the Year Ended December 31, 2018 As Reported Balance without Adoption Effect of Change Net sales $ 7,202.5 $ 7,202.3 $ 0.2 Cost of merchandise sold 5,821.6 5,821.6 — Consolidated Balance Sheet As of December 31, 2018 As Reported Balance without Adoption Effect of Change Merchandise inventory $ 658.7 $ 668.2 $ ( 9.5 ) Other current assets 54.1 54.4 ( 0.3 ) Other non-current liabilities 8.7 19.4 ( 10.7 ) Retained earnings 678.1 677.2 0.9 The following table summarizes the percentages of our net sales attributable to each of our vertical markets for the years ended December 31, 2020, 2019 and 2018: For the Years Ended December 31, 2020 2019 2018 Construction 58.1 % 58.4 % 58.2 % CIG 26.8 26.5 26.2 Industrial & Utility 15.1 15.1 15.6 Total net sales 100.0 % 100.0 % 100.0 % Certain reclassifications have been made to the vertical market assigned to customers in the prior years’ information to conform to the December 31, 2020 presentation. We had no material contract assets, contract liabilities, or deferred contract costs recorded on the consolidated balance sheet as of December 31, 2020 and 2019. In addition, for the years ended December 31, 2020, 2019 and 2018, revenue recognized in the reporting period that was included in the contract liability balance at the beginning of the period is not material. Revenue expected to be recognized in any future year related to remaining performance obligations is not material. As permitted in ASC Topic 606, we have elected to omit disclosure related to performance obligations for revenue pertaining to contracts that have an original expected duration of one year or less, to contracts where revenue is recognized as invoiced and to contracts with variable consideration related to wholly unsatisfied performance obligations.

Cash Discounts And Doubtful Acc

Cash Discounts And Doubtful Accounts	12 Months Ended
	Dec. 31, 2020
Cash Discounts And Doubtful Accounts [Abstract]
Cash Discounts And Doubtful Accounts	4. CASH DISCOUNTS AND DOUBTFUL ACCOUNTS The following table summarizes the activity in the allowances for cash discounts and doubtful accounts: Beginning Balance Provision (Charged to Expense) Deductions Ending Balance For the Year Ended December 31, 2020 Allowance for cash discounts $ 2.2 $ 35.1 $ ( 34.4 ) $ 2.9 Allowance for doubtful accounts 4.0 2.6 ( 2.6 ) 4.0 Total $ 6.2 $ 37.7 $ ( 37.0 ) $ 6.9 For the Year Ended December 31, 2019 Allowance for cash discounts $ 2.2 $ 35.8 $ ( 35.8 ) $ 2.2 Allowance for doubtful accounts 3.7 7.0 ( 6.7 ) 4.0 Total $ 5.9 $ 42.8 $ ( 42.5 ) $ 6.2 For the Year Ended December 31, 2018 Allowance for cash discounts $ 2.0 $ 33.2 $ ( 33.0 ) $ 2.2 Allowance for doubtful accounts 4.0 2.9 ( 3.2 ) 3.7 Total $ 6.0 $ 36.1 $ ( 36.2 ) $ 5.9

Inventory

Inventory	12 Months Ended
	Dec. 31, 2020
Inventory [Abstract]
Inventory	5. INVENTORY Our inventory, comprised entirely of finished goods, is stated at the lower of cost (generally determined using the LIFO cost method) or market. Inventories valued using the LIFO method comprised 89 % and 90 % of the total inventories at December 31, 2020 and 2019, respectively. Had the first-in, first-out (“FIFO”) method been used, merchandise inventory would have been $ 227.2 million and $ 186.5 million greater than reported under the LIFO method at December 31, 2020 and 2019, respectively. In 2020, we liquidated portions of previously created LIFO layers, resulting in decreases in cost of merchandise sold of $ 4.1 million. We did no t liquidate any portion of previously-created LIFO layers in 2019 and 2018. Reserves for excess and obsolete inventories were $ 8.6 million and $ 9.2 million at December 31, 2020 and 2019, respectively. The change in the reserve for excess and obsolete inventories, included in cost of merchandise sold, was $( 0.6 ) million, $ 1.4 million, and $( 1.4 ) million for the years ended December 31, 2020, 2019, and 2018, respectively.

Property And Depreciation

Property And Depreciation	12 Months Ended
	Dec. 31, 2020
Property And Depreciation [Abstract]
Property and Depreciation	6. PROPERTY AND DEPRECIATION We provide for depreciation and amortization using the straight-line method over the following estimated useful asset lives: Classification Estimated Useful Asset Life Buildings 42 years Leasehold improvements Over the shorter of the asset’s life or the lease term Furniture, fixtures, equipment and software 3 to 14 years Assets held under finance leases Over the shorter of the asset’s life or the lease term Depreciation expense was $ 36.7 million, $ 36.1 million, and $ 37.3 million in 2020, 2019, and 2018, respectively. At the time property is retired or otherwise disposed of, the asset and related accumulated depreciation are removed from the accounts, and any resulting gain or loss is credited or charged to other income, net. We consider properties to be assets held for sale when all of the following criteria are met: (i) a formal commitment to a plan to sell a property has been made and exercised; (ii) the property is available for sale in its present condition; (iii) actions required to complete the sale of the property have been initiated; (iv) sale of the property is probable and we expect the sale will occur within one year; and (v) the property is being actively marketed for sale at a price that is reasonable given its current market value. Upon designation as an asset held for sale, we record the carrying value of each property at the lower of its carrying value or its estimated fair value, less estimated costs to sell, and depreciation of the property ceases. We did no t have assets classified as held for sale at December 31, 2020, compared to assets held for sale of $ 0.1 million at December 31, 2019. During the year ended December 31, 2020, we sold assets classified as held for sale with a net book value of $ 4.4 million, and recorded a net gain of $ 3.4 million in other income, net. We did no t sell any assets classified as held for sale in 2019 or 2018. We review long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable. For assets classified as held and used, impairment may occur if projected undiscounted cash flows are not adequate to cover the carrying value of the assets. In such cases, additional analysis is conducted to determine the amount of the loss to be recognized. The impairment loss is calculated as the difference between the carrying amount of the asset and its estimated fair value. The analysis requires estimates of the amount and timing of projected cash flows and, where applicable, selection of an appropriate discount rate. Such estimates are critical in determining whether any impairment charge should be recorded and the amount of such charge if an impairment loss is deemed necessary.

Leases

Leases	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Leases	7. LEASES We have operating and finance leases for corporate offices, warehouse buildings, sales offices, branch locations, vehicles, and certain equipment. Our leases have remaining lease terms of one to ten years , some of which may include options to extend the leases for up to five years , and some of which may include options to terminate the leases within one year . In addition to fixed lease payments, we incur variable lease charges that are recognized as incurred. These charges are primarily for maintenance and real estate taxes on leased facilities. The components of the lease expense for the years ended December 31, 2020 and 2019, were as follows: For the Years Ended December 31, 2020 2019 Operating lease cost $ 37.9 $ 33.9 Finance lease cost: Amortization of right-of-use assets 2.1 2.2 Interest on lease liabilities 0.6 0.7 Total finance lease cost 2.7 2.9 Variable lease cost 10.6 9.5 Total lease cost $ 51.2 $ 46.3 Supplemental balance sheet information at December 31, 2020 and 2019, related to leases was as follows: December 31, 2020 2019 Operating leases: Operating lease right-of-use assets $ 118.8 $ 117.5 Current operating lease liabilities $ 31.2 $ 28.6 Non-current operating lease liabilities 95.9 96.2 Total operating lease liabilities $ 127.1 $ 124.8 Finance leases: Property, at cost $ 14.6 $ 18.3 Accumulated depreciation and amortization ( 8.1 ) ( 9.9 ) Net property $ 6.5 $ 8.4 Current obligations of finance leases $ 2.3 $ 2.1 Finance leases, net of current obligations 5.7 7.8 Total finance lease liabilities $ 8.0 $ 9.9 Weighted average remaining lease term: Operating leases 4.7 years 5.0 years Finance leases 4.4 years 5.1 years Weighted average discount rate: Operating leases 2.9 % 3.3 % Finance leases 7.3 % 7.0 % Supplemental cash flow and other information for the years ended December 31, 2020 and 2019, related to leases was as follows: For the Years Ended December 31, 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 37.3 $ 33.5 Operating cash flows from finance leases 0.6 0.7 Financing cash flows from finance leases 2.2 2.1 Right-of-use assets obtained in exchange for lease liabilities: Operating leases (A) $ 35.3 $ 55.9 Finance leases 0.3 2.0 (A) Includes $ 1.6 million of operating leases established on December 1, 2020 as a result of the acquisition of Shingle & Gibb Automation, LLC. See Note 17, “Acquisition”, for further information. Future minimum lease payments under non-cancellable leases as of December 31, 2020, were as follows: December 31, 2020 Operating Leases Finance Leases Future minimum lease payments 2021 $ 34.3 $ 2.8 2022 30.8 2.1 2023 24.7 1.5 2024 18.6 1.3 2025 11.9 0.9 Thereafter 15.7 0.9 Total future minimum lease payments $ 136.0 $ 9.5 Less: imputed interest ( 8.9 ) ( 1.5 ) Total lease obligation $ 127.1 $ 8.0 Less: current obligations ( 31.2 ) ( 2.3 ) Long-term lease obligation $ 95.9 $ 5.7

Goodwill And Other Intangible A

Goodwill And Other Intangible Assets	12 Months Ended
	Dec. 31, 2020
Goodwill And Other Intangible Assets [Abstract]
Goodwill And Other Intangible Assets	8. GOODWILL AND OTHER INTANGIBLE ASSETS In 2020, goodwill and other intangible assets increased due to the acquisition of Shingle & Gibb Automation, LLC. See Note 17, “Acquisition”, for further information. Goodwill The changes in the carrying amount of goodwill, included in other non-current assets in our consolidated balance sheets, for the years ended December 31 were as follows: 2020 2019 Beginning balance $ 30.1 $ 30.1 Goodwill acquired 7.0 — Ending balance $ 37.1 $ 30.1 As of December 31, 2020, we have completed our annual impairment test and concluded that there is no impairment of our goodwill. Other Intangible Assets Other intangible assets, included in other non-current assets in our consolidated balance sheets, consist of the following: As of December 31, 2020 Weighted Average Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount Customer relationships 8.5 to 14 years $ 30.5 $ ( 8.4 ) $ 22.1 Trade name 15 to 20 years 18.2 ( 3.6 ) 14.6 Non-compete agreements 3 to 7 years 0.7 ( 0.3 ) 0.4 Other intangible assets 10 years 0.1 ( 0.1 ) — Total $ 49.5 $ ( 12.4 ) $ 37.1 As of December 31, 2019 Weighted Average Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount Customer relationships 8.5 to 10.8 years $ 16.7 $ ( 6.7 ) $ 10.0 Trade name 15 to 20 years 14.3 ( 2.8 ) 11.5 Non-compete agreements 3 to 5 years 0.3 ( 0.3 ) — Other intangible assets 10 years 0.1 ( 0.1 ) — Total $ 31.4 $ ( 9.9 ) $ 21.5 We did not incur losses related to our other intangible assets during the year ended December 31, 2020. We incurred losses of $ 0.5 million related to our customer relationships during the year ended December 31, 2019. Amortization expense for other intangible assets was $ 2.5 million, $ 2.5 million, and $ 2.6 million for the years ended December 31, 2020, 2019, and 2018, respectively. Estimated future amortization expense related to our intangible assets for the years ending December 31 are as follows: 2021 $ 3.7 2022 3.7 2023 3.7 2024 3.6 2025 3.5 After 2025 18.9 $ 37.1

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2020
Income Taxes [Abstract]
Income Taxes	9. INCOME TAXES The components of income before taxes and the provision for income taxes recorded in the consolidated statements of income are as follows: For the Years Ended December 31, Components of Income before Taxes 2020 2019 2018 Domestic $ 151.1 $ 185.1 $ 163.3 Foreign 15.2 14.8 15.8 Income before taxes $ 166.3 $ 199.9 $ 179.1 For the Years Ended December 31, Components of Income Tax Provision 2020 2019 2018 Current expense U.S. Federal $ 38.5 $ 41.9 $ 20.5 State 11.4 12.4 6.9 Foreign 4.5 4.4 4.6 Total current expense $ 54.4 $ 58.7 $ 32.0 Deferred (benefit) expense U.S. Federal $ ( 7.8 ) $ ( 3.0 ) $ 2.5 State ( 2.3 ) ( 0.8 ) 0.8 Foreign ( 0.1 ) 0.1 0.1 Total deferred (benefit) expense $ ( 10.2 ) $ ( 3.7 ) $ 3.4 Total income tax provision $ 44.2 $ 55.0 $ 35.4 A reconciliation between the statutory U.S. federal income tax rate and the effective tax rate in the consolidated statements of income is as follows: For the Years Ended December 31, 2020 2019 2018 Statutory U.S. federal income tax rate 21.0 % 21.0 % 21.0 % State and local income taxes, net of federal benefit 4.3 4.5 3.1 Deemed repatriation of foreign earnings — — ( 1.0 ) Effect of tax rate changes — — ( 5.1 ) Nondeductible meals and entertainment 0.5 1.4 1.4 Other, net 0.8 0.6 0.4 Effective tax rate 26.6 % 27.5 % 19.8 % We determine our deferred tax assets and liabilities based upon the difference between the financial statement and tax bases of our assets and liabilities calculated using enacted applicable tax rates. We then assess the likelihood that our deferred tax assets will be recovered from future taxable income and, to the extent we believe that recovery is not likely, we establish a valuation allowance. Changes in the valuation allowance, when recorded, are included in the provision for income taxes in the consolidated financial statements. The following deferred tax assets (liabilities) were recorded at December 31: Assets (Liabilities) 2020 2019 Pension $ 47.2 $ 38.7 Operating lease liabilities 31.3 30.6 Postretirement benefits 20.8 19.6 Inventory 12.3 14.9 Other deferred tax assets 5.2 5.0 Payroll accruals 7.6 2.9 Bad debt reserves 0.8 1.0 Subtotal 125.2 112.7 Less: valuation allowances ( 0.6 ) ( 0.4 ) Deferred tax assets 124.6 112.3 Fixed assets ( 34.5 ) ( 32.2 ) Operating lease right-of-use assets ( 29.1 ) ( 28.7 ) Other deferred tax liabilities ( 4.9 ) ( 4.5 ) Computer software ( 2.4 ) ( 2.9 ) Deferred tax liabilities ( 70.9 ) ( 68.3 ) Net deferred tax assets $ 53.7 $ 44.0 Deferred income taxes included in non-current assets (liabilities) at December 31 were: 2020 2019 Deferred tax assets included in other non-current assets $ 54.1 $ 44.5 Deferred tax liabilities included in other non-current liabilities ( 0.4 ) ( 0.5 ) Total $ 53.7 $ 44.0 Operating loss and tax credit carryforwards included in net deferred tax assets at December 31 were: 2020 2019 U.S. Federal (A) $ 0.5 $ 0.4 State (A) 0.3 0.3 Foreign (B) — 0.1 (A) Expires between 2023 and 2030 (B) Indefinite life We have placed a partial valuation allowance on certain state net operating losses of less than $ 0.1 million and a full valuation allowance on U.S. federal tax credits of $ 0.5 million that are not expected to be utilized prior to expiration. We have no material undistributed earnings of non-U.S. subsidiaries as of December 31, 2020, due to the one-time transition tax and global intangible low-taxed income (“GILTI”) provisions enacted under the Tax Cuts and Jobs Act (“TCJA”). No additional income taxes have been provided for any outside basis differences inherent in these foreign entities, as these amounts continue to be indefinitely reinvested in foreign operations. We have made an accounting policy election to treat GILTI as a period cost rather than accounting for it as part of deferred taxes. Due to the high-tax exception election made in 2019 and 2020, our GILTI period cost was immaterial in each year. Our federal income tax returns for the tax years 2017 and forward are available for examination by the United States Internal Revenue Service (“IRS”). The statute of limitation for the 2017 federal return will expire on October 15, 2021, unless extended by consent. Our state income tax returns for 2016 through 2020 remain subject to examination by various state authorities with the latest period closing on December 31, 2025. We have not extended the statutes of limitations in any state jurisdictions with respect to years prior to 2016. In response to the COVID-19 pandemic, the Coronavirus Aid, Relief and Economic Security Act (“CARES Act”) was signed into law on March 27, 2020. The CARES Act, among other things, includes tax provisions relating to refundable payroll tax credits, deferment of employer social security payments, net operating loss utilization and carryback periods, modifications to net interest deduction limitations and technical corrections to tax depreciation methods for qualified improvement property (QIP). The CARES Act did not have a material impact on our income tax provision for 2020. Our unrecognized tax benefits of $ 1.7 million, $ 1.9 million, and $ 2.6 million as of December 31, 2020, 2019, and 2018, respectively, are uncertain tax positions that would impact our effective tax rate if recognized. We are periodically engaged in tax return examinations, reviews of statute of limitations periods, and settlements surrounding income taxes. We do not anticipate a material change in unrecognized tax benefits during the next twelve months. Our uncertain tax benefits, and changes thereto, during 2020, 2019, and 2018 were as follows: 2020 2019 2018 Balance at January 1, $ 1.9 $ 2.6 $ 2.3 Additions based on tax positions related to current year 0.2 0.2 1.1 Reductions for tax positions of prior years ( 0.1 ) ( 0.1 ) ( 0.8 ) Settlements ( 0.3 ) ( 0.8 ) — Balance at December 31, $ 1.7 $ 1.9 $ 2.6 We classify interest expense and penalties as part of our provision for income taxes based upon applicable federal and state interest/underpayment percentages. We have accrued $ 0.3 million and $ 0.4 million in interest and penalties at December 31, 2020 and 2019, respectively. Interest was computed on the difference between the provision for income taxes recognized in accordance with GAAP and the amount of benefit previously taken or expected to be taken in our federal, state, and local income tax returns.

Capital Stock

Capital Stock	12 Months Ended
	Dec. 31, 2020
Capital Stock [Abstract]
Capital Stock	10. CAPITAL STOCK Our common stock is 100 % owned by active and retired employees, and there is no public trading market for our common stock. Since 1928, substantially all of the issued and outstanding shares of common stock have been held of record by voting trustees under successive voting trust agreements. Under applicable New York law, a voting trust may not have a term greater than ten years. A new Voting Trust Agreement was established effective March 3, 2017, which expires by its terms on March 1, 2027. At December 31, 2020, approximately 83 % of our outstanding common stock was held in the voting trust. The participation of shareholders in the voting trust is voluntary at the time the voting trust is created, but is irrevocable during its term. Shareholders who elect not to participate in the voting trust hold their common stock as shareholders of record. Shareholders may elect to participate in the voting trust at any time during the term of the voting trust. No holder of our common stock or voting trust interests representing our common stock ("common stock", "common shares", or "shares") may sell, transfer or otherwise dispose of any shares without first offering us the option to purchase those shares at the price at which they were issued. We also have the option to purchase at the issue price the common shares of any shareholder who ceases to be an employee for any reason other than death or "retirement" (as defined in our amended restated certificate of incorporation), and on the first anniversary of any holder's death. In the past, we have always exercised these purchase options and we expect to continue to do so in the foreseeable future. However, we can make no assurance that we will continue to exercise our purchase option in the future. All outstanding shares have been issued at $ 20.00 per share. During 2020, eligible employees and qualified retirees subscribed for 1,052,817 shares totaling $ 21.1 million. Subscribers elected to make payments under one of the following options: (i) all shares subscribed for on or before January 15, 2021; or (ii) all shares subscribed for in installments paid through payroll deductions (or in certain cases where a subscriber is no longer on our payroll, through direct monthly payments) over an eleven-month period. Common shares were delivered to subscribers as of January 15, 2021, in the case of shares paid for prior to January 15, 2021. Shares will be issued and delivered to subscribers on a quarterly basis, as of the tenth day of March, June, September, and December, to the extent full payments for shares are made in the case of subscriptions under the installment method. Shown below is a summary of shares purchased and retired by the Company during the three years ended December 31: Shares of Common Stock Purchased Retired 2020 824,685 830,338 2019 962,023 957,495 2018 786,754 752,825 We also have authorized 10,000,000 shares of Delegated Authority Preferred Stock (“preferred stock”), par value one cent ($ 0.01 ). The preferred stock may be issued in one or more series, with the designations, relative rights, preferences, and limitations of shares of each such series being fixed by a resolution of our Board of Directors. There were no shares of preferred stock outstanding at December 31, 2020 and 2019. On December 12, 2019, our Board of Directors declared a 5 % common stock dividend. Each shareholder was entitled to one share of common stock for every twenty shares held as of December 16, 2019. The stock was issued on February 7, 2020. On December 13, 2018, our Board of Directors declared at 10 % common stock dividend. Each shareholder was entitled to one share of common stock for every ten shares held as of December 17, 2018. The stock was issued on February 1, 2019.

Net Income Per Share Of Common

Net Income Per Share Of Common Stock	12 Months Ended
	Dec. 31, 2020
Net Income Per Share Of Common Stock [Abstract]
Net Income Per Share Of Common Stock	11. NET INCOME PER SHARE OF COMMON STOCK The computation of net income per share of common stock is based on the average number of common shares outstanding during each year, adjusted in all periods presented for the declaration of a 5 % stock dividend declared in 2019, and a 10 % stock dividend declared in 2018. The average number of shares used in computing net income per share of common stock at December 31, 2020, 2019, and 2018 was 22,642,057 shares, 22,555,240 shares, and 22,507,701 shares, respectively.

Debt

Debt	12 Months Ended
	Dec. 31, 2020
Debt [Abstract]
Debt	12. DEBT December 31, Long-term Debt 2020 2019 Finance arrangements, various maturities, with a weighted average interest rate of 7.23 % $ 8.0 $ 11.6 Less current portion ( 2.3 ) ( 3.8 ) Long-term Debt $ 5.7 $ 7.8 Long-term Debt matures as follows: 2021 $ 2.3 2022 1.8 2023 1.2 2024 1.2 2025 0.8 After 2025 0.7 $ 8.0 The carrying amount of our outstanding long-term, fixed-rate debt exceeded its fair value by $ 1.3 million and $ 1.4 million at December 31, 2020 and 2019, respectively. The fair value of the long-term, fixed-rate debt is estimated by calculating future cash flows at interpolated Treasury yields with similar maturities, plus an estimate of our credit risk spread. The fair value of our variable-rate short- and long-term debt approximates its carrying value at December 31, 2020 and 2019, respectively. Revolving Credit Facility At December 31, 2020 and 2019, we, along with Graybar Canada Limited, our Canadian operating subsidiary (“Graybar Canada”), had an unsecured, five-year , $ 750.0 million committed revolving credit agreement maturing in August 2023 with Bank of America, N.A. and the other lenders named therein (the “Amended Credit Agreement”), which includes a combined letter of credit sub-facility of up to $ 25.0 million, a U.S. swing-line loan facility of up to $ 75.0 million, and a Canadian swing-line loan facility of up to $ 20.0 million. The Amended Credit Agreement includes a $ 100.0 million sublimit (in U.S. or Canadian dollars) for borrowings by Graybar Canada. The Amended Credit Agreement contains an accordion feature, which allows us to request increases in the aggregate borrowing commitments of up to $ 375.0 million. Interest on our borrowings under the Amended Credit Agreement will be based on, at the borrower’s election, either (A) in the case of Graybar as borrower (i) the base rate (as defined in the agreement) plus a margin ranging from 0.00 % to 0.60 %, or (ii) LIBOR plus a margin ranging from 1.00 % to 1.60 % or (B) in the case of Graybar Canada as borrower (i) the base rate (as defined in the agreement) plus a margin ranging from 0.00 % to 0.60 % or (ii) CDOR plus a margin ranging from 1.00 % to 1.60 %, in either case, as determined by the pricing grid set forth in the Amended Credit Agreement, subject to adjustment based upon the consolidated leverage ratio. In connection with such a borrowing, the applicable borrower will also select the term of the loan, up to six months, or automatically renew with the consent of the lenders. Swing line loans, which are daily loans, will bear interest at a rate based on, at the borrower’s election, either (i) the base rate or (ii) the daily floating Eurodollar rate (or CDOR, in the case of Graybar Canada). In addition to interest payments, there are certain fees and obligations associated with borrowings, swing-line loans, letters of credit and other administrative matters. Borrowings of Graybar Canada may be in U.S. dollars or Canadian dollars. The obligations of Graybar Canada are secured by the guaranty of Graybar and any material domestic subsidiaries of Graybar (as defined). Under no circumstances will Graybar Canada use its borrowings to benefit Graybar or its operations, including without limitation to repay any of Graybar’s obligations under the facility. The Amended Credit Agreement provides for a quarterly commitment fee ranging from 0.25 % to 0.40 % per annum, subject to adjustment based upon the consolidated leverage ratio for a fiscal quarter, and letter of credit fees ranging from 1.00 % to 1.60 % per annum payable quarterly, subject to such adjustment. Availability under the Amended Credit Agreement is subject to the accuracy of representations and warranties and absence of a default and, in the case of Canadian borrowings denominated in Canadian dollars, the absence of a material adverse change in the national or international financial markets that would make it impracticable to lend Canadian dollars. The Amended Credit Agreement also provides for customary events of default, including a failure to pay principal, interest or fees when due, failure to comply with covenants, the fact that any representation or warranty made by any of the credit parties is materially incorrect, the occurrence of an event of default under certain other indebtedness by us and our subsidiaries, the commencement of certain insolvency or receivership events affecting any of the credit parties, certain actions under the Employee Retirement Income Security Act of 1974 ("ERISA") and the occurrence of a change in control of any of the credit parties (subject to certain permitted transactions as described in the Amended Credit Agreement). Upon the occurrence of an event of default, the commitments of the lenders may be terminated and all outstanding obligations of the credit parties under the Amended Credit Agreement may be declared immediately due and payable. The Amended Credit Agreement contains affirmative and negative covenants customary for credit facilities of this type, including limitations on us and our subsidiaries with respect to indebtedness (with specified, limited exceptions), liens, changes in the nature of our business, investments, mergers and acquisitions, issuance of equity securities, dispositions of assets and dissolution of certain subsidiaries, transactions with affiliates, restricted payments (subject to incurrence tests, with certain exceptions, including payments under senior notes), as well as securitizations, factoring transactions, and transactions with sanctioned parties or in violation of certain U.S. or Canadian anti-corruption laws. There are also maximum leverage ratio and minimum interest coverage ratio financial covenants to which we will be subject to during the term of the Amended Credit Agreement. We were in compliance with all covenants under the Amended Credit Agreement as of December 31, 2020 and 2019. Short-term borrowings of $ 50.0 million and $ 138.0 million outstanding at December 31, 2020 and 2019, respectively, were drawn under the Amended Credit Agreement. Short-term borrowings outstanding during the years ended December 31, 2020 and 2019 ranged from a minimum of $ 50.0 million and $ 10.0 million to a maximum of $ 370.0 million and $ 257.0 million, respectively. The average daily amount of borrowings outstanding under the Amended Credit Agreement during 2020 and 2019 amounted to approximately $ 191.6 million and $ 151.0 million at weighted-average interest rates 1.55 % and 3.42 %, respectively. The weighted-average interest rate for amounts outstanding at December 31, 2020 was 1.15 %. At December 31, 2020, we had available unused committed lines of credit under the Amended Credit Agreement amounting to $ 699.6 million, compared to $ 611.5 million at December 31, 2019. Interest expense, net was $ 3.6 million, $ 5.5 million, and $ 6.9 million for the years ended December 31, 2020, 2019, and 2018, respectively. Private Placement Shelf Agreements We had an uncommitted, unsecured $ 100.0 million private placement shelf agreement with PGIM, Inc. (the "Prudential Shelf Agreement"), which was expected to allow us to issue senior promissory notes to affiliates of PGIM, Inc. at fixed rate terms to be agreed upon at the time of any issuance during a three-year issuance period ending in August 2020. In July 2020, we amended the Prudential Shelf Agreement to extend the issuance period to August 2023. Other terms of the Prudential Shelf Agreement remained unchanged. We also have an uncommitted, unsecured $ 100.0 million private placement shelf agreement (the "MetLife Shelf Agreement") with Metropolitan Life Insurance Company and MetLife Investment Advisors, LLC and each other affiliate of MetLife that becomes a party to the agreement (collectively, "MetLife"). The MetLife Shelf Agreement is expected to allow us to issue senior promissory notes to MetLife at fixed or floating rate economic terms to be agreed upon at the time of issuance during a three-year period ending August 2021. We remain obligated under a most favored lender clause which is designed to ensure that any notes in the future under the Prudential Shelf Agreement and MetLife Shelf Agreement will continue to be of equal ranking with indebtedness under our Amended Credit Agreement. No notes have been issued under either the Prudential Shelf Agreement or the MetLife Shelf Agreement as of December 31, 2020 and 2019. Each shelf agreement contains representations and warranties of the Company and the applicable lender, customary events of default and affirmative and negative covenants, customary for agreements of this type. These covenants are substantially similar to those contained in the Amended Credit Agreement, subject to a number of exceptions and qualifications set forth in the applicable shelf agreement. All outstanding obligations of Graybar under one or both of these agreements may be declared immediately due and payable upon the occurrence of an event of default. We were in compliance with all covenants under the Prudential Shelf Agreement and the Metlife Shelf Agreements as of December 31, 2020 and 2019. Letters of Credit We had total letters of credit of $ 6.3 million outstanding at December 31, 2020, of which $ 0.4 million were issued under the Amended Credit Agreement. We had total letters of credit of $ 5.6 million outstanding at December 31, 2019, of which $ 0.5 million were issued under the Amended Credit Agreement. The letters of credit are issued primarily to support certain workers' compensation insurance policies.

Pension And Other Postretiremen

Pension And Other Postretirement Benefits	12 Months Ended
	Dec. 31, 2020
Pension And Other Postretirement Benefits [Abstract]
Pension And Other Postretirement Benefits	13. PENSION AND OTHER POSTRETIREMENT BENEFITS We have a noncontributory defined benefit pension plan (the "Pension Plan") covering substantially all employees first hired prior to July 1, 2015 after the completion of one year of service and 1,000 hours of service . The Pension Plan provides retirement benefits based on an employee’s final average earnings and years of service. These employees become 100 % vested after three years of service, regardless of age. A supplemental benefit plan provides nonqualified pension benefits for compensation in excess of the IRS compensation limits applicable to the Pension Plan and eligible compensation deferred by a participant. Our funding policy is to make contributions to the Pension Plan, provided that the total annual contributions will not be less than ERISA and the Pension Protection Act of 2006 minimums or greater than the maximum tax-deductible amount, to review the contribution and funding strategy on a regular basis, and to allow discretionary contributions to be made by us from time to time. The assets of the Pension Plan are invested primarily in fixed income investments and equity securities. We pay nonqualified pension benefits when they are due according to the terms of the supplemental benefit plan. We provide certain postretirement healthcare and life insurance benefits to retired employees. Substantially all of our employees hired or rehired prior to 2014 may become eligible for postretirement medical benefits if they reach the age and service requirements of the retiree medical plan and retire on a pension (except a deferred pension) under the Pension Plan. Medical benefits are self-insured and claims are administered through a third party administrator. The cost of coverage is determined based on the annual projected plan costs. The participant's premium or cost is determined based on Company guidelines. Postretirement life insurance benefits are insured through an insurance company. We fund postretirement benefits as incurred, and accordingly, there were no assets held in the postretirement benefits plan at December 31, 2020 and 2019. The following table sets forth information regarding the funded status of our pension and other postretirement benefits as of December 31, 2020 and 2019: Pension Benefits Postretirement Benefits 2020 2019 2020 2019 Change in Benefit Obligation: Benefit obligation at beginning of period $ 825.1 $ 708.8 $ 76.2 $ 72.5 Service cost 29.2 25.6 2.1 2.0 Interest cost 26.7 30.0 2.4 2.9 Actuarial loss 134.7 117.0 4.9 3.0 Benefits paid from plan assets ( 2.1 ) ( 52.3 ) — — Benefits paid from Company assets ( 1.8 ) ( 1.7 ) ( 5.8 ) ( 5.8 ) Plan participants' contributions — — 1.1 1.4 Administrative expenses paid ( 3.2 ) ( 2.3 ) — — Plan amendments — — — 0.2 Settlements ( 86.8 ) — — — Benefit Obligation at End of Period 921.8 825.1 80.9 76.2 Change in Plan Assets: Fair value of plan assets at beginning of period 658.4 588.3 — — Actual return on plan assets 115.7 114.7 — — Employer contributions (A) 41.8 11.7 4.7 4.4 Plan participants' contributions — — 1.1 1.4 Benefits paid (A) ( 3.9 ) ( 54.0 ) ( 5.8 ) ( 5.8 ) Administrative expenses paid ( 3.2 ) ( 2.3 ) — — Settlements ( 86.8 ) — — — Fair Value of Plan Assets at End of Period 722.0 658.4 — — Unfunded Status $ 199.8 $ 166.7 $ 80.9 $ 76.2 (A) Includes $ 1.8 million and $ 1.7 million paid from our assets for unfunded nonqualified pension benefits in fiscal years 2020 and 2019, respectively. The accumulated benefit obligation for our Pension Plan was $ 844.0 million and $ 746.8 million at December 31, 2020 and 2019, respectively. Amounts recognized in the consolidated balance sheet for the years ended December 31 consist of the following: Pension Benefits Postretirement Benefits 2020 2019 2020 2019 Current accrued benefit cost $ 1.9 $ 2.1 $ 6.8 $ 6.8 Non-current accrued benefit cost 197.9 164.6 74.1 69.4 Net amount recognized $ 199.8 $ 166.7 $ 80.9 $ 76.2 Current accrued benefit cost for both pension benefits and postretirement benefits is included in other current liabilities in the consolidated balance sheets. Non-current accrued benefit cost for pension benefits and postretirement benefits are included in pension liability and postretirement benefits liability, respectively, in the consolidated balance sheets. Amounts recognized in accumulated other comprehensive loss for the years ended December 31, net of tax, consist of the following: Pension Benefits Postretirement Benefits 2020 2019 2020 2019 Net actuarial loss $ 227.9 $ 232.4 $ 13.6 $ 10.4 Prior service cost — — 0.1 0.1 Accumulated other comprehensive loss $ 227.9 $ 232.4 $ 13.7 $ 10.5 The actuarial losses for the Pension Plan in 2020 and 2019 were primarily related to decreases in the discount rate and changes to the lump-sum interest rates used to measure the benefit obligations compared to the previous year. Weighted-average assumptions used to determine the actuarial present value of the pension and postretirement benefit obligations as of December 31 are: Pension Benefits Postretirement Benefits 2020 2019 2020 2019 Discount rate 2.62 % 3.38 % 2.22 % 3.19 % Rate of compensation increase 4.49 % 4.36 % — — Healthcare cost trend on covered charges — — 5.00 % 5.00 % The net periodic benefit cost for the years ended December 31, 2020, 2019, and 2018 included the following components: Pension Benefits Postretirement Benefits Components of Net Periodic Benefit Cost 2020 2019 2018 2020 2019 2018 Selling, general, and administrative expenses: Service cost $ 29.2 $ 25.6 $ 28.6 $ 2.1 $ 2.0 $ 2.3 Total selling, general, and administrative expenses $ 29.2 $ 25.6 $ 28.6 $ 2.1 $ 2.0 $ 2.3 Non-operating expenses: Interest cost 26.7 30.0 27.3 2.4 2.9 2.6 Expected return on plan assets ( 32.8 ) ( 34.1 ) ( 31.9 ) — — — Amortization of: Net actuarial loss 30.2 19.1 26.5 — 0.3 0.9 Prior service cost (gain) — — 0.3 0.7 — ( 2.0 ) Settlement charge 27.7 — — — — — Total non-operating expenses $ 51.8 $ 15.0 $ 22.2 $ 3.1 $ 3.2 $ 1.5 Net periodic benefit cost $ 81.0 $ 40.6 $ 50.8 $ 5.2 $ 5.2 $ 3.8 During 2020, we made lump-sum pension benefit distributions exceeding the settlement accounting threshold. A pension settlement charge is required when the cost of all settlements during the year is greater than the sum of the service and interest cost components of the annual net periodic pension cost. Accordingly, we recorded a non-cash pension settlement charge of $ 27.7 million in non-operating expenses on our consolidated statements of income. This settlement charge represented the immediate recognition into expense of a portion of the unrecognized loss within accumulated other comprehensive loss in proportion to the share of the projected benefit obligation that was settled by the lump-sum pension benefit distributions. Weighted-average assumptions used to determine net periodic benefit cost for the years ended December 31 were: Pension Benefits Postretirement Benefits 2020 2019 2018 2020 2019 2018 Discount rate 3.38 % / 2.72 % 4.31 % 3.67 % 3.19 % 4.16 % 3.44 % Expected return on plan assets 5.50 % 5.75 % 5.75 % — — — Rate of compensation increase 4.24 % 4.36 % 4.49 % — — — Healthcare cost trend on covered charges — — — 5.00 % 5.00 % 5.50 % / 5.00 % A discount rate of 3.38 % was used as of January 1, 2020 to determine the net periodic benefit cost for the Pension Plan, which was lowered to 2.72 % effective September 30, 2020 for the remeasurement of the plan liability upon triggering settlement accounting. The expected return on plan assets assumption for the Pension Plan is a long-term assumption and was determined after evaluating input from both the plan’s actuary and pension fund investment advisors, consideration of macroeconomic conditions, historical rates of return on plan assets, and anticipated current and long-term rates of return on the various classes of assets in which the plan invests. For measurement of the postretirement benefits net periodic cost, a 5.00 % annual rate of increase in per capita cost of covered healthcare benefits was assumed for 2020. The rate was assumed to remain at 5.00 % in 2021 and to remain at that level thereafter. We expect to fund $ 1.6 million for nonqualified pension benefits during 2021. Required pension contributions under ERISA regulations are expected to be $ 40.0 million in 2021; however, additional contributions may be made at our discretion. Estimated future defined benefit pension and other postretirement benefit plan payments to plan participants for the years ending December 31 are as follows: Year Pension Benefits Postretirement Benefits 2021 $ 64.0 $ 6.9 2022 61.5 7.2 2023 63.7 7.4 2024 61.7 7.5 2025 62.1 7.4 2026 to 2030 301.8 32.8 The investment objective of our Pension Plan is to ensure that there are sufficient assets to fund regular pension benefits payable to employees over the long-term life of the plan. Our Pension Plan seeks to allocate plan assets in a manner that is closely duration-matched with the actuarial projected cash flow liabilities, consistent with prudent standards for preservation of capital, tolerance of investment risk, and maintenance of liquidity. Assets of the qualified pension plan are held by Comerica Bank (the "Trustee"). Our Pension Plan utilizes a liability-driven investment (“LDI”) approach to help meet these objectives. The LDI strategy employs a structured fixed-income portfolio designed to reduce volatility in the plan's future funding requirements and funding status. This is accomplished by using a blend of long duration government, quasi-governmental and corporate fixed-income securities, as well as appropriate levels of equity and alternative investments designed to optimize the plan's liability hedge ratio. In practice, the value of an asset portfolio constructed primarily of fixed income securities is inversely correlated to changes in market interest rates, primarily offsetting changes in the value of the pension benefit obligation caused by changes in the interest rate used to discount plan liabilities. Asset allocation information for the Pension Plan at December 31, 2020 and 2019 is as follows: Investment 2020 Actual Allocation 2020 Target Allocation Range 2019 Actual Allocation 2019 Target Allocation Range Equity securities-U.S. 7 % 3 - 10 % 6 % 3 - 10 % Equity securities-International 10 % 2 - 10 % 9 % 2 - 10 % Fixed income investments 66 % 40 - 80 % 68 % 40 - 80 % Hedge funds 5 % 2 - 8 % 5 % 2 - 8 % Private markets 4 % 0 - 15 % 4 % 0 - 15 % Other investments 7 % 0 - 14 % 8 % 0 - 14 % Short-term investments 1 % 1 - 10 % — % 1 - 10 % Total 100 % 100 % 100 % 100 % The following is a description of the valuation methodologies used for assets held by the Pension Plan measured at fair value: Equity securities - U.S. Equity securities - U.S. consist of investments in U.S. corporate stocks and U.S. equity mutual funds. U.S. equity mutual funds include publicly traded mutual funds and a bank collective fund for ERISA plans. U.S. corporate stocks and U.S. equity mutual funds are primarily large-capitalization stocks (defined as companies with market capitalization of more than $10 billion). U.S. corporate stocks and publicly traded mutual funds are valued at the closing price reported on the active public market in which the individual securities are traded and are classified as Level 1. The bank collective fund for ERISA plans is valued at the net asset value ("NAV") of units of the fund. The NAV, as provided by the Trustee, is used as a practical expedient to estimate fair value. The NAV is based on the fair value of the underlying investments held by the fund. Equity securities – International Equity securities - International consist of investments in international corporate stocks, publicly traded mutual funds, and a collective investment trust, and are primarily investments within developed and emerging markets. Investments other than the collective investment trust are valued at the closing price reported on the active public market in which the individual securities are traded and are classified as Level 1. The collective investment trust is valued at the NAV of units of the fund. The NAV, as provided by the Trustee, is used as a practical expedient to estimate fair value. The NAV is based on the fair value of the underlying investments held by the fund. Audited financial statements are produced on an annual basis for the collective investment trust. Fixed income investments Fixed income investments consist of U.S. and international corporate bonds, government and government agency bonds, as well as a publicly traded mutual fund and commingled funds, both of which invest in corporate and government debt securities within the U.S. U.S. and international corporate bonds, government and government agency bonds, and the publicly traded mutual fund are valued at the closing price reported on the active market in which they are traded and thus are classified as Level 1. The commingled funds are valued at the NAV of units of the fund. The NAV, as provided by the Trustee, is used as a practical expedient to estimate fair value. The NAV is based on the fair value of the underlying investments held by the fund. Hedge funds Hedge funds consist of investments in various hedge funds structured as fund-of-funds (defined as a single fund that invests in multiple funds). The hedge funds use various investment strategies in an attempt to generate non-correlated returns. A fund-of-funds is designed to help diversify and reduce the risk of the overall portfolio. The hedge funds are valued at the NAV of units of the fund. The NAV, as provided by the Trustee, is used as a practical expedient to estimate fair value. The NAV is based on the fair value of the underlying investments held by the fund. Audited financial statements are produced on an annual basis for the hedge funds. Private markets Private markets consist of private equity investments. Private markets is an asset class that is generally characterized as requiring long-term commitments and where liquidity is typically limited. Private markets do not have an actively traded market with readily observable prices. The investments are limited partnerships (“LP”) and are diversified across typical private equity strategies including: buyouts, co-investments, secondary offerings, venture capital, real estate, and special situations. Valuations are developed using a variety of proprietary model methodologies. Valuations may be derived from publicly available sources as well as information obtained from each fund's general partner based upon public market conditions and returns. All private markets investments are classified as Level 3, other than two limited partnerships valued at the NAV of units of the funds and a real estate investment trust (“REIT”). The REIT is a commingled trust valued at the NAV of units of the trust. The NAV, as provided by the Trustee, is used as a practical expedient to estimate fair value. The NAV is based on the fair value of the underlying investments held by the fund. Audited financial statements are produced on an annual basis for the private markets investments. Other investments Other investments consist of investments in a diversified mutual fund, a private debt fund, and a high-yield bond fund. The diversified mutual fund is valued using quoted prices in an active market, and is therefore classified as Level 1. The private debt fund is valued using unobservable inputs with limited trading activity, and is therefore classified as Level 3. The high-yield bond fund is valued using the NAV based on the fair value of the underlying investments held by the fund. The NAV, as provided by the Trustee, is used as a practical expedient to estimate fair value. Audited financial statements are produced on an annual basis for the private debt fund and the high-yield bond fund. Short-term investments Short-term investments consist of cash and cash equivalents in a short-term fund which is valued at the NAV of units of the fund. The NAV, as provided by the Trustee, is used as a practical expedient to estimate fair value. The NAV is based on the fair value of the underlying investments held by the fund. The methods described above may produce fair value calculations that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while we believe our Pension Plan valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date. There have been no changes in the methodologies for determining fair value at December 31, 2020 or 2019. The following tables set forth, by level within the fair value hierarchy, the Pension Plan assets measured at fair value as of December 31, 2020 and 2019: December 31, 2020 Investment Investments Measured at NAV Level 1 Level 2 Level 3 Total Equity securities - U.S. $ 17.3 $ 30.6 $ — $ — $ 47.9 Equity securities - International 24.9 45.4 — — 70.3 Fixed income investments 317.4 162.5 — — 479.9 Hedge funds 36.0 — — — 36.0 Private markets 15.6 — — 13.8 29.4 Other investments 22.1 21.2 — 11.4 54.7 Short-term investments 3.8 — — — 3.8 Total $ 437.1 $ 259.7 $ — $ 25.2 $ 722.0 December 31, 2019 Investment Investments Measured at NAV Level 1 Level 2 Level 3 Total Equity securities - U.S. $ 14.0 $ 26.0 $ — $ — $ 40.0 Equity securities - International 20.7 37.9 — — 58.6 Fixed income investments 312.7 135.2 — — 447.9 Hedge funds 32.0 — — — 32.0 Private markets 17.0 — — 11.0 28.0 Other investments 17.7 20.4 — 11.4 49.5 Short-term investments 2.4 — — — 2.4 Total $ 416.5 $ 219.5 $ — $ 22.4 $ 658.4 The tables below set forth a summary of changes in the fair value of the Pension Plan's Level 3 assets for the years ended December 31, 2020 and 2019: December 31, 2020 Private Markets Other Investments Total Balance, beginning of year $ 11.0 $ 11.4 $ 22.4 Unrealized gains 1.0 0.6 1.6 Purchases 2.5 — 2.5 Sales ( 0.7 ) ( 0.6 ) ( 1.3 ) Balance, end of year $ 13.8 $ 11.4 $ 25.2 December 31, 2019 Private Markets Other Investments Total Balance, beginning of year $ 6.0 $ 4.4 $ 10.4 Realized gains 0.1 — 0.1 Unrealized gains 0.7 0.8 1.5 Purchases 4.4 6.8 11.2 Sales ( 0.2 ) ( 0.6 ) ( 0.8 ) Balance, end of year $ 11.0 $ 11.4 $ 22.4

Profit Sharing And Savings Plan

Profit Sharing And Savings Plan	12 Months Ended
	Dec. 31, 2020
Profit Sharing And Savings Plan [Abstract]
Profit Sharing And Savings Plan	14. PROFIT SHARING AND SAVINGS PLAN We provide a defined contribution profit sharing and savings plan (the "Plan") covering substantially all of our eligible employees with an individual account for each participant. Employees may make voluntary before-tax and/or after-tax contributions to the saving portion of the Plan, ranging from 2 % to 50 % of pay, subject to limitations imposed by federal tax law, ERISA, and the Pension Protection Act of 2006. Substantially all employees hired or rehired after July 1, 2015 are eligible to receive a Company matching contribution beginning the first month after the completion of one year of service and 1,000 hours of service . Effective July 1, 2019, eligible employees receive Company matching contributions beginning the first month after the completion of six months of service and 500 hours of service . The Company match is equal to 50 % of an eligible employee's before-tax or Roth payroll contribution, up to 6 % of pay per payroll period, with a maximum match per payroll period of 3 %. The matching contribution expense recognized by us was $ 3.8 million, $ 2.7 million, and $ 1.8 million for the years ended December 31, 2020, 2019 and 2018, respectively. Annual contributions made by us to the profit-sharing portion of the Plan are determined by the Board of Directors at its discretion, and are generally based on the profitability of the Company. Expense recognized by us under the profit-sharing portion of the Plan was $ 46.8 million, $ 56.8 million, and $ 67.4 million for the years ended December 31, 2020, 2019 and 2018, respectively.

Commitments And Contingencies

Commitments And Contingencies	12 Months Ended
	Dec. 31, 2020
Commitments And Contingencies [Abstract]
Commitments And Contingencies	15. COMMITMENTS AND CONTINGENCIES Rental expense was $ 40.3 million, $ 36.4 million, and $ 29.4 million in 2020, 2019, and 2018, respectively. For future minimum rental payments required under operating leases that have either initial or remaining noncancelable lease terms in excess of one year as of December 31, 2020, refer to Note 7, “Leases”. We are subject to various claims, disputes, and administrative and legal matters incidental to our past and current business activities. As a result, contingencies can arise resulting from an existing condition, situation, or set of circumstances involving an uncertainty as to the realization of a possible loss. Estimated loss contingencies are accrued only if the loss is probable and the amount of the loss can be reasonably estimated. With respect to a particular loss contingency, it may be probable that a loss has occurred but the estimate of the loss is a wide range. If we deem an amount within the range to be a better estimate than any other amount within the range, that amount will be accrued. However, if no amount within the range is a better estimate than any other amount, the minimum amount of the range is accrued. While we believe that none of these claims, disputes or administrative and legal matters will have a material adverse effect on our financial position, these matters are uncertain and we cannot at this time determine whether the financial impact, if any, of these matters will be material to our results of operations in the period in which such matters are resolved or a better estimate becomes available.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	12 Months Ended
	Dec. 31, 2020
Accumulated Other Comprehensive Loss [Abstract]
Accumulated Other Comprehensive Loss	16. ACCUMULATED OTHER COMPREHENSIVE LOSS The components of accumulated other comprehensive loss as of December 31 are as follows: 2020 2019 Currency translation $ ( 5.1 ) $ ( 7.7 ) Pension liability ( 227.9 ) ( 232.4 ) Postretirement benefits liability ( 13.7 ) ( 10.5 ) Accumulated other comprehensive loss $ ( 246.7 ) $ ( 250.6 ) The following table represents the total amounts of actuarial losses recognized that were reclassified from accumulated other comprehensive loss for the years ended December 31, 2020 and 2019: 2020 2019 Amortization of Pension and Other Postretirement Benefits Items Amortization of Pension and Other Postretirement Benefits Items Actuarial Losses Recognized Actuarial Losses Recognized Affected Line in Consolidated Statement of Income: Non-operating expenses (A) $ 58.6 $ 19.4 Tax benefit ( 15.1 ) ( 5.0 ) Total reclassifications for the period, net of tax $ 43.5 $ 14.4 (A) A settlement charge of $ 27.7 million is included in 2020 non-operating expenses. The following table represents the activity included in accumulated other comprehensive loss for the years ended December 31, 2020 and 2019: 2020 2019 Foreign Currency Pension and Other Postretirement Benefits Total Foreign Currency Pension and Other Postretirement Benefits Total Beginning balance January 1, $ ( 7.7 ) $ ( 242.9 ) $ ( 250.6 ) $ ( 12.4 ) $ ( 227.9 ) $ ( 240.3 ) Other comprehensive income before reclassifications 2.6 — 2.6 4.7 — 4.7 Amounts reclassified from accumulated other comprehensive loss (net of tax $(15.1) and $(5.0)) — 43.5 43.5 — 14.4 14.4 Actuarial loss, (net of tax $14.6 and $10.2) — ( 42.2 ) ( 42.2 ) — ( 29.4 ) ( 29.4 ) Net current-period other comprehensive income (loss) 2.6 1.3 3.9 4.7 ( 15.0 ) ( 10.3 ) Ending balance December 31, $ ( 5.1 ) $ ( 241.6 ) $ ( 246.7 ) $ ( 7.7 ) $ ( 242.9 ) $ ( 250.6 )

Acquisition

Acquisition	12 Months Ended
	Dec. 31, 2020
Acquisition [Abstract]
Acquisition	17. ACQUISITION On December 1, 2020, we purchased Shingle & Gibb Automation, LLC, a leading control and automation solutions provider with a successful track record of distributing, developing, and implementing advanced industrial automation systems, for a preliminary purchase price of $ 27.2 million in cash, net of cash acquired. The acquisition will help Graybar accelerate growth, diversify our business, extend our reach, and enhance our profitability. The preliminary purchase price allocation resulted in $ 7.0 million and $ 18.1 million of tax deductible goodwill and other intangible assets, respectively. Since the date of acquisition, Shingle & Gibb Automation, LLC. results are reflected in our consolidated financial statements. Pro forma results of the acquisition were not material; therefore, they are not presented.

Quarterly Financial Information

Quarterly Financial Information (Unaudited)	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information (Unaudited) [Abstract]
Quarterly Financial Information (Unaudited)	18. QUARTERLY FINANCIAL INFORMATION (UNAUDITED) The following tables set forth selected quarterly financial data for the years ended December 31, 2020 and 2019: 2020 For the Quarter Ended March 31, June 30, September 30, December 31, Net sales $ 1,773.2 $ 1,763.0 $ 1,877.9 $ 1,851.6 Gross margin $ 340.4 $ 333.3 $ 355.2 $ 340.6 Net income attributable to the Company $ 21.4 $ 37.1 $ 34.5 $ 28.8 Net income attributable to the Company per share of common stock $ 0.94 $ 1.64 $ 1.52 $ 1.28 2019 For the Quarter Ended March 31, June 30, September 30, December 31, Net sales $ 1,777.8 $ 1,948.0 $ 1,981.4 $ 1,816.7 Gross margin $ 338.7 $ 367.7 $ 377.8 $ 344.8 Net income attributable to the Company $ 34.3 $ 47.0 $ 48.8 $ 14.4 Net income attributable to the Company per share of common stock (A) $ 1.51 $ 2.08 $ 2.17 $ 0.65 (A) All periods adjusted for a 5 % stock dividend declared in December 2019. Prior to these adjustments, the average common shares outstanding for the first, second, third, and fourth quarters of 2019 were 21,616,141 shares, 21,513,493 shares, 21,449,751 shares, and 21,390,053 shares, respectively.

Summary Of Significant Accoun_2

Summary Of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
Summary Of Significant Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation The consolidated financial statements include the accounts of Graybar and its subsidiary companies. All material intercompany balances and transactions have been eliminated. The ownership interests that are held by owners other than the Company are in subsidiaries owned by the Company and are accounted for and reported as noncontrolling interests.
Estimates	Estimates The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and the disclosure of contingent assets and liabilities. Actual results could differ from these estimates.
Subsequent Events	Subsequent Events We have evaluated subsequent events through the time of the filing of this Annual Report on Form 10-K with the Commission. No material subsequent events have occurred since December 31, 2020 that require recognition or disclosure in our financial statements.
Revenue Recognition	Revenue Recognition Sales revenue is recognized when performance obligations are satisfied, which is typically upon delivery of the product to the customer. Sometimes product is purchased from the manufacturer and drop-shipped to the customer. We generally take control of the goods when shipped by the manufacturer and then recognize revenue when control of the product transfers to the customer. Revenues recognized are primarily for product sales, but may also include freight and handling charges. Our standard warehouse shipping terms are FOB shipping point, under which control passes to the customer at the time of shipment. We also earn revenue for professional services, general contracting services, and storage services. Such service revenue represented less than 1 % of gross sales for the years ended December 31, 2020, 2019, and 2018. Revenue is reported net of all taxes, primarily sales tax, assessed by governmental authorities as a result of revenue-producing transactions.
Outgoing Freight Expenses	Outgoing Freight Expenses We record 95 % of outgoing freight expenses as a component of selling, general and administrative expenses. Total outgoing freight expenses were $ 68.8 million, $ 68.5 million, and $ 65.7 million for the years ended December 31, 2020, 2019, and 2018, respectively.
Cash and Cash Equivalents	Cash and Cash Equivalents We account for cash on hand, deposits in banks, and other short-term, highly liquid investments with an original maturity of three months or less as cash and cash equivalents.
Allowance for Credit Losses	Allowance for Credit Losses We perform ongoing credit evaluations of our customers, and a significant portion of our trade receivables is secured by mechanic’s lien or payment bond rights. We maintain allowances to reflect the expected uncollectability of trade receivables based on past collection history pooled on the aging of the receivables, specific risks identified in the receivables portfolio based on current conditions, and expected future economic conditions when necessary. Although actual credit losses have historically been within management’s expectations, additional allowances may be required if the financial condition of our customers were to deteriorate.
Merchandise Inventory	Merchandise Inventory Our inventory, comprised entirely of finished goods, is stated at the lower of cost (generally determined using the last-in, first-out (“LIFO”) cost method) or market. LIFO accounting is a method of accounting that, compared with other inventory accounting methods, generally provides better matching of current costs with current sales. We make provisions for obsolete or excess inventories as necessary to reflect reductions in inventory value.
Vendor Allowances	Vendor Allowances Our agreements with many of our suppliers provide for us to earn volume incentives based on purchases during the agreement period. Based on the provisions of our vendor agreements, we develop vendor accrual rates by estimating our performance under the agreements and the amounts that will be earned. We perform analyses and review historical trends to ensure the deferred amounts earned are appropriately recorded. Certain vendor agreements contain purchase volume incentives that provide for increased funding when graduated purchase volumes are met. Amounts accrued throughout the year are based on estimates of future activity levels, and could be materially impacted if actual purchase volumes differ. Changes in the estimated amount of incentives are treated as changes in estimate and are recognized in earnings in the period in which the change in estimate occurs. In the event that the operating performance of our suppliers were to decline, however, there can be no assurance that amounts earned would be paid or that the volume incentives would continue to be included in future agreements.
Property and Depreciation	Property and Depreciation Property, plant and equipment are recorded at cost. Depreciation is expensed on a straight-line basis over the estimated useful lives of the related assets. Interest costs incurred to finance expenditures for major long-term construction projects are capitalized as part of the asset's historical cost and included in property, plant and equipment, then depreciated over the useful life of the asset. Leasehold improvements are amortized over the term of the lease or the estimated useful life of the improvement, whichever is shorter. Expenditures for maintenance and repairs are charged to expense when incurred, while the costs of significant improvements, which extend the useful life of the underlying asset, are capitalized.
Fair Value	Fair Value We endeavor to utilize the best available information in measuring fair value. GAAP has established a fair value hierarchy, which prioritizes the inputs used in measuring fair value. The tiers in the hierarchy include: Level 1, defined as observable inputs such as quoted prices in active markets; Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3, defined as unobservable inputs for which little or no market data exists, therefore requiring an entity to develop its own data inputs and assumptions. We have used fair value measurements to value our pension plan assets.
Foreign Currency Exchange Rate	Foreign Currency Exchange Rate The functional currency for our Canadian subsidiary is the Canadian dollar. Accordingly, its balance sheet amounts are translated at the exchange rates in effect at the end of each reporting period and its statements of income amounts are translated at the average rates of exchange prevailing during the current period. Currency translation adjustments are included in accumulated other comprehensive loss.
Goodwill	Goodwill Our goodwill is not amortized, but rather tested annually for impairment. Goodwill is reviewed annually in the fourth quarter and when circumstances or other events might indicate that impairment may have occurred. We first perform a qualitative assessment of goodwill impairment. The qualitative assessment considers several factors including the excess fair value over carrying value as of the last quantitative impairment test, the length of time since the last fair value measurement, the current carrying value, market conditions, actual performance compared to forecasted performance, and the current business outlook. If the qualitative assessment indicates that it is more likely than not that goodwill is impaired, the reporting unit is then quantitatively tested for impairment. If a quantitative assessment is required, the fair value is determined using a variety of assumptions including estimated future cash flows of the reporting unit using applicable discount rates.
Definite Lived Intangible Assets	Definite Lived Intangible Assets The cost of intangible assets with determinable useful lives is amortized to reflect the pattern of economic benefits consumed, either on a straight-line or accelerated basis over the estimated periods benefited. Customer relationships, trade names and other non-contractual intangible assets with determinable lives are amortized over periods generally ranging from 3 to 20 years. Intangible assets are tested for impairment if events or circumstances occur indicating that the respective asset might be impaired.
Income Taxes	Income Taxes We recognize deferred tax assets and liabilities to reflect the future tax consequences of events that have been recognized in the financial statements or tax returns. A deferred tax asset or liability results from the temporary difference between an item’s carrying value as reflected in the financial statements and its tax basis, and is calculated using enacted applicable tax rates. We assess the likelihood that our deferred tax assets will be recovered from future taxable income and, to the extent we believe that recovery is not likely, a valuation allowance is established. Changes in the valuation allowance, when recorded, are included in the provision for income taxes in the consolidated financial statements. We classify interest expense and penalties as part of our provision for income taxes based upon applicable federal and state interest/underpayment percentages. We assess uncertainty regarding tax positions taken in previously filed returns and record reserves in accordance with the guidance under Accounting Standards Codification ("ASC") 740-10, "Accounting for Uncertainty in Income Taxes".
Other Postretirement Benefits	Other Postretirement Benefits We account for postretirement benefits other than pension benefits by accruing the costs of benefits to be provided over the eligible employees’ periods of active service. These costs are determined on an actuarial basis. Our consolidated balance sheets reflect the funded status of postretirement benefits.
Pension Plan	Pension Plan We sponsor a noncontributory defined benefit pension plan accounted for by accruing the cost to provide the benefits over the eligible employees’ periods of active service. These costs are determined on an actuarial basis. Our consolidated balance sheets reflect the funded status of the defined benefit pension plan.
Leases	Leases We determine if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use (“ROU”) assets, current operating lease liabilities, and non-current operating lease liabilities on our consolidated balance sheets. Amounts related to finance leases are included in property and equipment, current portion of long-term debt, and long-term debt on our consolidated balance sheets. ROU assets and lease liabilities are recognized and measured on the date the underlying asset is made available to us. Operating lease ROU assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. We use our incremental borrowing rate based on the information available at the commencement date in determining the present value of future payments. The operating lease ROU asset also includes any lease payments made and excludes lease incentives. Our lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. Operating lease expense for minimum lease payments is recognized on a straight-line basis over the lease term. For certain leases, such as real estate and information technology (IT) equipment, we account for the lease and non-lease components as a single lease component. For all other leases, we account for the lease and non-lease components separately. We have elected as an accounting policy not to apply the recognition requirements for short-term leases. Therefore, leases with a term of twelve months or less are not recorded on the consolidated balance sheets. Lease expenses associated with short-term leases are immaterial and are recorded in the consolidated statements of income in selling, general and administrative expenses. Additionally, for certain vehicle leases, we apply a portfolio approach to account for the operating lease ROU assets and liabilities.
Non-Operating Expenses	Non-Operating Expenses Non-operating expenses are comprised of interest expense, net and non-service cost components of the net periodic benefit cost for the pension and other postretirement benefit plans. The non-service cost components include interest cost, expected return on plan assets, amortization of net actuarial gains/losses, amortization of prior service costs/gains, and charges due to settlement of certain plan liabilities.
New Accounting Standards	New Accounting Standards In June 2016, the FASB issued Accounting Standards Update (“ASU” or “Update”) 2016-13, "Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments", which introduced new guidance for the accounting for credit losses on certain financial instruments. The amendments in this ASU were effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years and required a cumulative-effect adjustment to the balance sheet as of the beginning of the first reporting period in which the guidance is effective. Periods presented prior to the adoption date are not adjusted. We adopted this Update as of January 1, 2020. We determined that our trade receivables are financial instruments subject to this Update. We have evaluated the accounting policies applicable to our allowance for doubtful accounts and have developed new methods to include three components into our allowance to comply with requirements of the ASU: 1) a reserve derived from historical loss rates based upon the aging of our trade receivables, 2) a reserve based upon specifically-identified trade receivables in our portfolio that are considered higher risk based on current conditions, and 3) an additional reserve, as necessary, to consider the impact of future economic conditions. The adoption of this Update did not have a material impact on our consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, "Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement" ("ASU 2018-13") that makes minor changes to the disclosure requirements on fair value measurements in Topic 820. The guidance eliminates requirements for certain disclosures that are no longer considered cost beneficial and adds new disclosure requirements that the FASB considers pertinent. We adopted this Update as of January 1, 2020. The adoption did not have a material impact on our consolidated financial statements. In August 2018, the FASB issued ASU 2018-15, "Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract" ("ASU 2018-15") requiring a customer in a cloud computing arrangement that is a service contract to follow the internal use software guidance in ASC 350-40 to determine which implementation costs to capitalize as assets. Capitalized implementation costs related to a hosting arrangement that is a service contract will be amortized over the term of the hosting arrangement, beginning when the module or component of the hosting arrangement is ready for its intended use. We adopted this Update as of January 1, 2020. The adoption did not have a material impact on our consolidated financial statements. In August 2018, the FASB issued ASU 2018-14, "Compensation-Retirement Benefits-Defined Benefit Plans-General (Subtopic 715-20): Disclosure Framework-Changes to the Disclosure Requirements for Defined Benefit Plans" ("ASU 2018-14") that makes minor changes to the disclosure requirements for employers that sponsor defined benefit pension and/or other postretirement benefit plans. The guidance eliminates requirements for certain disclosures that are no longer considered cost beneficial and adds new disclosure requirements that the FASB considers pertinent. ASU 2018-14 is effective for fiscal years ending after December 15, 2020 for public entities. Early adoption is permitted. We adopted this Update as of December 31, 2020. The adoption did not have a material impact on our consolidated financial statements. In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting” (“ASU 2020-04”) that provides temporary relief to the GAAP guidance on contract modifications and hedge accounting to ease the financial reporting burdens of the expected market transition from LIBOR and other interbank offered rates to alternative rates. This Update is effective for all entities as of March 12, 2020 through December 31, 2022. The guidance on contract modifications, which is applicable to Graybar, can be applied prospectively from any date beginning March 12, 2020 and may also be applied to modifications of existing contracts made earlier in the interim period that includes March 12, 2020. We have evaluated the impact of the adoption of the Update on our contracts and our consolidated financial statements. We do not engage in hedging transactions and we anticipate that our few impacted contracts will continue to use LIBOR until December 31, 2021. As such, we currently believe this Update will not have a material impact on our contracts and our consolidated financial statements.

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Dec. 31, 2020
Revenue [Abstract]
Schedule of New Accounting Pronouncements	Consolidated Statements of Income For the Year Ended December 31, 2018 As Reported Balance without Adoption Effect of Change Net sales $ 7,202.5 $ 7,202.3 $ 0.2 Cost of merchandise sold 5,821.6 5,821.6 — Consolidated Balance Sheet As of December 31, 2018 As Reported Balance without Adoption Effect of Change Merchandise inventory $ 658.7 $ 668.2 $ ( 9.5 ) Other current assets 54.1 54.4 ( 0.3 ) Other non-current liabilities 8.7 19.4 ( 10.7 ) Retained earnings 678.1 677.2 0.9
Disaggregation of Revenue	For the Years Ended December 31, 2020 2019 2018 Construction 58.1 % 58.4 % 58.2 % CIG 26.8 26.5 26.2 Industrial & Utility 15.1 15.1 15.6 Total net sales 100.0 % 100.0 % 100.0 %

Cash Discounts And Doubtful A_2

Cash Discounts And Doubtful Accounts (Tables)	12 Months Ended
	Dec. 31, 2020
Cash Discounts And Doubtful Accounts [Abstract]
Schedule of Cash Discounts and Doubtful Accounts	Beginning Balance Provision (Charged to Expense) Deductions Ending Balance For the Year Ended December 31, 2020 Allowance for cash discounts $ 2.2 $ 35.1 $ ( 34.4 ) $ 2.9 Allowance for doubtful accounts 4.0 2.6 ( 2.6 ) 4.0 Total $ 6.2 $ 37.7 $ ( 37.0 ) $ 6.9 For the Year Ended December 31, 2019 Allowance for cash discounts $ 2.2 $ 35.8 $ ( 35.8 ) $ 2.2 Allowance for doubtful accounts 3.7 7.0 ( 6.7 ) 4.0 Total $ 5.9 $ 42.8 $ ( 42.5 ) $ 6.2 For the Year Ended December 31, 2018 Allowance for cash discounts $ 2.0 $ 33.2 $ ( 33.0 ) $ 2.2 Allowance for doubtful accounts 4.0 2.9 ( 3.2 ) 3.7 Total $ 6.0 $ 36.1 $ ( 36.2 ) $ 5.9

Property And Depreciation (Tabl

Property And Depreciation (Tables)	12 Months Ended
	Dec. 31, 2020
Property And Depreciation [Abstract]
Schedule Of Property And Depreciation	Classification Estimated Useful Asset Life Buildings 42 years Leasehold improvements Over the shorter of the asset’s life or the lease term Furniture, fixtures, equipment and software 3 to 14 years Assets held under finance leases Over the shorter of the asset’s life or the lease term

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Schedule Of Lease Expense	For the Years Ended December 31, 2020 2019 Operating lease cost $ 37.9 $ 33.9 Finance lease cost: Amortization of right-of-use assets 2.1 2.2 Interest on lease liabilities 0.6 0.7 Total finance lease cost 2.7 2.9 Variable lease cost 10.6 9.5 Total lease cost $ 51.2 $ 46.3
Schedule Of Supplemental Balance Sheet Information	December 31, 2020 2019 Operating leases: Operating lease right-of-use assets $ 118.8 $ 117.5 Current operating lease liabilities $ 31.2 $ 28.6 Non-current operating lease liabilities 95.9 96.2 Total operating lease liabilities $ 127.1 $ 124.8 Finance leases: Property, at cost $ 14.6 $ 18.3 Accumulated depreciation and amortization ( 8.1 ) ( 9.9 ) Net property $ 6.5 $ 8.4 Current obligations of finance leases $ 2.3 $ 2.1 Finance leases, net of current obligations 5.7 7.8 Total finance lease liabilities $ 8.0 $ 9.9 Weighted average remaining lease term: Operating leases 4.7 years 5.0 years Finance leases 4.4 years 5.1 years Weighted average discount rate: Operating leases 2.9 % 3.3 % Finance leases 7.3 % 7.0 %
Schedule Of Supplemental Cash Flow And Other Information	Supplemental cash flow and other information for the years ended December 31, 2020 and 2019, related to leases was as follows: For the Years Ended December 31, 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 37.3 $ 33.5 Operating cash flows from finance leases 0.6 0.7 Financing cash flows from finance leases 2.2 2.1 Right-of-use assets obtained in exchange for lease liabilities: Operating leases (A) $ 35.3 $ 55.9 Finance leases 0.3 2.0 (A) Includes $ 1.6 million of operating leases established on December 1, 2020 as a result of the acquisition of Shingle & Gibb Automation, LLC. See Note 17, “Acquisition”, for further information.
Schedule Of Maturity Of Lease Liabilities	December 31, 2020 Operating Leases Finance Leases Future minimum lease payments 2021 $ 34.3 $ 2.8 2022 30.8 2.1 2023 24.7 1.5 2024 18.6 1.3 2025 11.9 0.9 Thereafter 15.7 0.9 Total future minimum lease payments $ 136.0 $ 9.5 Less: imputed interest ( 8.9 ) ( 1.5 ) Total lease obligation $ 127.1 $ 8.0 Less: current obligations ( 31.2 ) ( 2.3 ) Long-term lease obligation $ 95.9 $ 5.7

Goodwill And Other Intangible_2

Goodwill And Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2020
Goodwill And Other Intangible Assets [Abstract]
Schedule of Goodwill	2020 2019 Beginning balance $ 30.1 $ 30.1 Goodwill acquired 7.0 — Ending balance $ 37.1 $ 30.1
Schedule of Finite-Lived Intangible Assets	As of December 31, 2020 Weighted Average Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount Customer relationships 8.5 to 14 years $ 30.5 $ ( 8.4 ) $ 22.1 Trade name 15 to 20 years 18.2 ( 3.6 ) 14.6 Non-compete agreements 3 to 7 years 0.7 ( 0.3 ) 0.4 Other intangible assets 10 years 0.1 ( 0.1 ) — Total $ 49.5 $ ( 12.4 ) $ 37.1 As of December 31, 2019 Weighted Average Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount Customer relationships 8.5 to 10.8 years $ 16.7 $ ( 6.7 ) $ 10.0 Trade name 15 to 20 years 14.3 ( 2.8 ) 11.5 Non-compete agreements 3 to 5 years 0.3 ( 0.3 ) — Other intangible assets 10 years 0.1 ( 0.1 ) — Total $ 31.4 $ ( 9.9 ) $ 21.5
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	2021 $ 3.7 2022 3.7 2023 3.7 2024 3.6 2025 3.5 After 2025 18.9 $ 37.1

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2020
Income Taxes [Abstract]
Schedule Of Unrecognized Tax Benefits Roll Forward	2020 2019 2018 Balance at January 1, $ 1.9 $ 2.6 $ 2.3 Additions based on tax positions related to current year 0.2 0.2 1.1 Reductions for tax positions of prior years ( 0.1 ) ( 0.1 ) ( 0.8 ) Settlements ( 0.3 ) ( 0.8 ) — Balance at December 31, $ 1.7 $ 1.9 $ 2.6
Schedule Of Effective Income Tax Rate Reconciliation	For the Years Ended December 31, 2020 2019 2018 Statutory U.S. federal income tax rate 21.0 % 21.0 % 21.0 % State and local income taxes, net of federal benefit 4.3 4.5 3.1 Deemed repatriation of foreign earnings — — ( 1.0 ) Effect of tax rate changes — — ( 5.1 ) Nondeductible meals and entertainment 0.5 1.4 1.4 Other, net 0.8 0.6 0.4 Effective tax rate 26.6 % 27.5 % 19.8 %
Schedule Of Income Before Income Tax, Domestic And Foreign	For the Years Ended December 31, Components of Income before Taxes 2020 2019 2018 Domestic $ 151.1 $ 185.1 $ 163.3 Foreign 15.2 14.8 15.8 Income before taxes $ 166.3 $ 199.9 $ 179.1
Schedule Of Components Of Income Tax Expense Benefit	For the Years Ended December 31, Components of Income Tax Provision 2020 2019 2018 Current expense U.S. Federal $ 38.5 $ 41.9 $ 20.5 State 11.4 12.4 6.9 Foreign 4.5 4.4 4.6 Total current expense $ 54.4 $ 58.7 $ 32.0 Deferred (benefit) expense U.S. Federal $ ( 7.8 ) $ ( 3.0 ) $ 2.5 State ( 2.3 ) ( 0.8 ) 0.8 Foreign ( 0.1 ) 0.1 0.1 Total deferred (benefit) expense $ ( 10.2 ) $ ( 3.7 ) $ 3.4 Total income tax provision $ 44.2 $ 55.0 $ 35.4
Schedule Of Deferred Tax Assets And Liabilities	Assets (Liabilities) 2020 2019 Pension $ 47.2 $ 38.7 Operating lease liabilities 31.3 30.6 Postretirement benefits 20.8 19.6 Inventory 12.3 14.9 Other deferred tax assets 5.2 5.0 Payroll accruals 7.6 2.9 Bad debt reserves 0.8 1.0 Subtotal 125.2 112.7 Less: valuation allowances ( 0.6 ) ( 0.4 ) Deferred tax assets 124.6 112.3 Fixed assets ( 34.5 ) ( 32.2 ) Operating lease right-of-use assets ( 29.1 ) ( 28.7 ) Other deferred tax liabilities ( 4.9 ) ( 4.5 ) Computer software ( 2.4 ) ( 2.9 ) Deferred tax liabilities ( 70.9 ) ( 68.3 ) Net deferred tax assets $ 53.7 $ 44.0 Deferred income taxes included in non-current assets (liabilities) at December 31 were: 2020 2019 Deferred tax assets included in other non-current assets $ 54.1 $ 44.5 Deferred tax liabilities included in other non-current liabilities ( 0.4 ) ( 0.5 ) Total $ 53.7 $ 44.0
Summary Of Operating Loss Carryforwards	Operating loss and tax credit carryforwards included in net deferred tax assets at December 31 were: 2020 2019 U.S. Federal (A) $ 0.5 $ 0.4 State (A) 0.3 0.3 Foreign (B) — 0.1 (A) Expires between 2023 and 2030 (B) Indefinite life

Capital Stock (Tables)

Capital Stock (Tables)	12 Months Ended
	Dec. 31, 2020
Capital Stock [Abstract]
Schedule of Common Stock Shares Purchased and Retired	Shares of Common Stock Purchased Retired 2020 824,685 830,338 2019 962,023 957,495 2018 786,754 752,825

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2020
Debt [Abstract]
Schedule Of Long-term Debt	December 31, Long-term Debt 2020 2019 Finance arrangements, various maturities, with a weighted average interest rate of 7.23 % $ 8.0 $ 11.6 Less current portion ( 2.3 ) ( 3.8 ) Long-term Debt $ 5.7 $ 7.8
Schedule Of Long-term Debt Maturities	Long-term Debt matures as follows: 2021 $ 2.3 2022 1.8 2023 1.2 2024 1.2 2025 0.8 After 2025 0.7 $ 8.0

Pension And Other Postretirem_2

Pension And Other Postretirement Benefits (Tables)	12 Months Ended
	Dec. 31, 2020
Pension And Other Postretirement Benefits [Abstract]
Schedule Of Net Funded Status	Pension Benefits Postretirement Benefits 2020 2019 2020 2019 Change in Benefit Obligation: Benefit obligation at beginning of period $ 825.1 $ 708.8 $ 76.2 $ 72.5 Service cost 29.2 25.6 2.1 2.0 Interest cost 26.7 30.0 2.4 2.9 Actuarial loss 134.7 117.0 4.9 3.0 Benefits paid from plan assets ( 2.1 ) ( 52.3 ) — — Benefits paid from Company assets ( 1.8 ) ( 1.7 ) ( 5.8 ) ( 5.8 ) Plan participants' contributions — — 1.1 1.4 Administrative expenses paid ( 3.2 ) ( 2.3 ) — — Plan amendments — — — 0.2 Settlements ( 86.8 ) — — — Benefit Obligation at End of Period 921.8 825.1 80.9 76.2 Change in Plan Assets: Fair value of plan assets at beginning of period 658.4 588.3 — — Actual return on plan assets 115.7 114.7 — — Employer contributions (A) 41.8 11.7 4.7 4.4 Plan participants' contributions — — 1.1 1.4 Benefits paid (A) ( 3.9 ) ( 54.0 ) ( 5.8 ) ( 5.8 ) Administrative expenses paid ( 3.2 ) ( 2.3 ) — — Settlements ( 86.8 ) — — — Fair Value of Plan Assets at End of Period 722.0 658.4 — — Unfunded Status $ 199.8 $ 166.7 $ 80.9 $ 76.2 (A) Includes $ 1.8 million and $ 1.7 million paid from our assets for unfunded nonqualified pension benefits in fiscal years 2020 and 2019, respectively.
Schedule Of Amounts Recognized In Balance Sheet	Pension Benefits Postretirement Benefits 2020 2019 2020 2019 Current accrued benefit cost $ 1.9 $ 2.1 $ 6.8 $ 6.8 Non-current accrued benefit cost 197.9 164.6 74.1 69.4 Net amount recognized $ 199.8 $ 166.7 $ 80.9 $ 76.2
Schedule Of Amounts Recognized In Accumulated Other Comprensive Income (Loss)	Pension Benefits Postretirement Benefits 2020 2019 2020 2019 Net actuarial loss $ 227.9 $ 232.4 $ 13.6 $ 10.4 Prior service cost — — 0.1 0.1 Accumulated other comprehensive loss $ 227.9 $ 232.4 $ 13.7 $ 10.5
Schedule Of Net Periodic Benefit Costs	The net periodic benefit cost for the years ended December 31, 2020, 2019, and 2018 included the following components: Pension Benefits Postretirement Benefits Components of Net Periodic Benefit Cost 2020 2019 2018 2020 2019 2018 Selling, general, and administrative expenses: Service cost $ 29.2 $ 25.6 $ 28.6 $ 2.1 $ 2.0 $ 2.3 Total selling, general, and administrative expenses $ 29.2 $ 25.6 $ 28.6 $ 2.1 $ 2.0 $ 2.3 Non-operating expenses: Interest cost 26.7 30.0 27.3 2.4 2.9 2.6 Expected return on plan assets ( 32.8 ) ( 34.1 ) ( 31.9 ) — — — Amortization of: Net actuarial loss 30.2 19.1 26.5 — 0.3 0.9 Prior service cost (gain) — — 0.3 0.7 — ( 2.0 ) Settlement charge 27.7 — — — — — Total non-operating expenses $ 51.8 $ 15.0 $ 22.2 $ 3.1 $ 3.2 $ 1.5 Net periodic benefit cost $ 81.0 $ 40.6 $ 50.8 $ 5.2 $ 5.2 $ 3.8 During 2020, we made lump-sum pension benefit distributions exceeding the settlement accounting threshold. A pension settlement charge is required when the cost of all settlements during the year is greater than the sum of the service and interest cost components of the annual net periodic pension cost. Accordingly, we recorded a non-cash pension settlement charge of $ 27.7 million in non-operating expenses on our consolidated statements of income. This settlement charge represented the immediate recognition into expense of a portion of the unrecognized loss within accumulated other comprehensive loss in proportion to the share of the projected benefit obligation that was settled by the lump-sum pension benefit distributions. Weighted-average assumptions used to determine net periodic benefit cost for the years ended December 31 were: Pension Benefits Postretirement Benefits 2020 2019 2018 2020 2019 2018 Discount rate 3.38 % / 2.72 % 4.31 % 3.67 % 3.19 % 4.16 % 3.44 % Expected return on plan assets 5.50 % 5.75 % 5.75 % — — — Rate of compensation increase 4.24 % 4.36 % 4.49 % — — — Healthcare cost trend on covered charges — — — 5.00 % 5.00 % 5.50 % / 5.00 %
Schedule Of Expected Benefit Payments	Year Pension Benefits Postretirement Benefits 2021 $ 64.0 $ 6.9 2022 61.5 7.2 2023 63.7 7.4 2024 61.7 7.5 2025 62.1 7.4 2026 to 2030 301.8 32.8
Schedule Of Allocation Of Plan Assets	Investment 2020 Actual Allocation 2020 Target Allocation Range 2019 Actual Allocation 2019 Target Allocation Range Equity securities-U.S. 7 % 3 - 10 % 6 % 3 - 10 % Equity securities-International 10 % 2 - 10 % 9 % 2 - 10 % Fixed income investments 66 % 40 - 80 % 68 % 40 - 80 % Hedge funds 5 % 2 - 8 % 5 % 2 - 8 % Private markets 4 % 0 - 15 % 4 % 0 - 15 % Other investments 7 % 0 - 14 % 8 % 0 - 14 % Short-term investments 1 % 1 - 10 % — % 1 - 10 % Total 100 % 100 % 100 % 100 %
Schedule Of Changes In Fair Value Of Plan Assets	The following tables set forth, by level within the fair value hierarchy, the Pension Plan assets measured at fair value as of December 31, 2020 and 2019: December 31, 2020 Investment Investments Measured at NAV Level 1 Level 2 Level 3 Total Equity securities - U.S. $ 17.3 $ 30.6 $ — $ — $ 47.9 Equity securities - International 24.9 45.4 — — 70.3 Fixed income investments 317.4 162.5 — — 479.9 Hedge funds 36.0 — — — 36.0 Private markets 15.6 — — 13.8 29.4 Other investments 22.1 21.2 — 11.4 54.7 Short-term investments 3.8 — — — 3.8 Total $ 437.1 $ 259.7 $ — $ 25.2 $ 722.0 December 31, 2019 Investment Investments Measured at NAV Level 1 Level 2 Level 3 Total Equity securities - U.S. $ 14.0 $ 26.0 $ — $ — $ 40.0 Equity securities - International 20.7 37.9 — — 58.6 Fixed income investments 312.7 135.2 — — 447.9 Hedge funds 32.0 — — — 32.0 Private markets 17.0 — — 11.0 28.0 Other investments 17.7 20.4 — 11.4 49.5 Short-term investments 2.4 — — — 2.4 Total $ 416.5 $ 219.5 $ — $ 22.4 $ 658.4 The tables below set forth a summary of changes in the fair value of the Pension Plan's Level 3 assets for the years ended December 31, 2020 and 2019: December 31, 2020 Private Markets Other Investments Total Balance, beginning of year $ 11.0 $ 11.4 $ 22.4 Unrealized gains 1.0 0.6 1.6 Purchases 2.5 — 2.5 Sales ( 0.7 ) ( 0.6 ) ( 1.3 ) Balance, end of year $ 13.8 $ 11.4 $ 25.2 December 31, 2019 Private Markets Other Investments Total Balance, beginning of year $ 6.0 $ 4.4 $ 10.4 Realized gains 0.1 — 0.1 Unrealized gains 0.7 0.8 1.5 Purchases 4.4 6.8 11.2 Sales ( 0.2 ) ( 0.6 ) ( 0.8 ) Balance, end of year $ 11.0 $ 11.4 $ 22.4

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Dec. 31, 2020
Accumulated Other Comprehensive Loss [Abstract]
Components of Accumulated Other Comprehensive Income (Loss)	2020 2019 Currency translation $ ( 5.1 ) $ ( 7.7 ) Pension liability ( 227.9 ) ( 232.4 ) Postretirement benefits liability ( 13.7 ) ( 10.5 ) Accumulated other comprehensive loss $ ( 246.7 ) $ ( 250.6 )
Reclassification out of Accumulated Other Comprehensive Income (Loss)	The following table represents the total amounts of actuarial losses recognized that were reclassified from accumulated other comprehensive loss for the years ended December 31, 2020 and 2019: 2020 2019 Amortization of Pension and Other Postretirement Benefits Items Amortization of Pension and Other Postretirement Benefits Items Actuarial Losses Recognized Actuarial Losses Recognized Affected Line in Consolidated Statement of Income: Non-operating expenses (A) $ 58.6 $ 19.4 Tax benefit ( 15.1 ) ( 5.0 ) Total reclassifications for the period, net of tax $ 43.5 $ 14.4 (A) A settlement charge of $ 27.7 million is included in 2020 non-operating expenses.
Changes in Accumlated Other Comprehensive Income (Loss)	2020 2019 Foreign Currency Pension and Other Postretirement Benefits Total Foreign Currency Pension and Other Postretirement Benefits Total Beginning balance January 1, $ ( 7.7 ) $ ( 242.9 ) $ ( 250.6 ) $ ( 12.4 ) $ ( 227.9 ) $ ( 240.3 ) Other comprehensive income before reclassifications 2.6 — 2.6 4.7 — 4.7 Amounts reclassified from accumulated other comprehensive loss (net of tax $(15.1) and $(5.0)) — 43.5 43.5 — 14.4 14.4 Actuarial loss, (net of tax $14.6 and $10.2) — ( 42.2 ) ( 42.2 ) — ( 29.4 ) ( 29.4 ) Net current-period other comprehensive income (loss) 2.6 1.3 3.9 4.7 ( 15.0 ) ( 10.3 ) Ending balance December 31, $ ( 5.1 ) $ ( 241.6 ) $ ( 246.7 ) $ ( 7.7 ) $ ( 242.9 ) $ ( 250.6 )

Quarterly Financial Informati_2

Quarterly Financial Information (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information (Unaudited) [Abstract]
Schedule of Quarterly Financial Information (Unaudited)	2020 For the Quarter Ended March 31, June 30, September 30, December 31, Net sales $ 1,773.2 $ 1,763.0 $ 1,877.9 $ 1,851.6 Gross margin $ 340.4 $ 333.3 $ 355.2 $ 340.6 Net income attributable to the Company $ 21.4 $ 37.1 $ 34.5 $ 28.8 Net income attributable to the Company per share of common stock $ 0.94 $ 1.64 $ 1.52 $ 1.28 2019 For the Quarter Ended March 31, June 30, September 30, December 31, Net sales $ 1,777.8 $ 1,948.0 $ 1,981.4 $ 1,816.7 Gross margin $ 338.7 $ 367.7 $ 377.8 $ 344.8 Net income attributable to the Company $ 34.3 $ 47.0 $ 48.8 $ 14.4 Net income attributable to the Company per share of common stock (A) $ 1.51 $ 2.08 $ 2.17 $ 0.65 (A) All periods adjusted for a 5 % stock dividend declared in December 2019. Prior to these adjustments, the average common shares outstanding for the first, second, third, and fourth quarters of 2019 were 21,616,141 shares, 21,513,493 shares, 21,449,751 shares, and 21,390,053 shares, respectively.

Summary Of Significant Accoun_3

Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Concentration Risk [Line Items]
Cost of merchandise sold	$ 5,896.2	$ 6,094.9	$ 5,821.6
Outgoing freight expenses	$ 68.8	$ 68.5	$ 65.7
Minimum
Concentration Risk [Line Items]
Amortization period	3 years
Maximum
Concentration Risk [Line Items]
Amortization period	20 years
Sales revenue | Services | Maximum
Concentration Risk [Line Items]
Concentration percentage	1.00%
Freight Expenses As Selling, General And Administrative Expenses | Outgoing Freight Expenses
Concentration Risk [Line Items]
Concentration percentage	95.00%
Prudential Private Placement Shelf Agreement
Concentration Risk [Line Items]
Agreement face amount	$ 100

Revenue (Narrative) (Details)

Revenue (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 935				$ 897.8				$ 935	$ 897.8	$ 870.5		$ 761.6
Retained Earnings (Accumulated Deficit)	725.1				694				725.1	694	678.1
Sales Revenue, Goods, Net	1,851.6	$ 1,877.9	$ 1,763	$ 1,773.2	1,816.7	$ 1,981.4	$ 1,948	$ 1,777.8	7,265.7	7,523.9	7,202.5
Contract assets, contract liabilities, or deferred contract costs recorded
Accounting Standards Update 2014-09 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest											0.8
Revision of Prior Period, Change in Accounting Principle, Adjustment [Member] | Accounting Standards Update 2014-09 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest												$ 0.8
Retained Earnings (Accumulated Deficit)												$ (0.3)
Sales Revenue, Goods, Net											0.2
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained Earnings (Accumulated Deficit)											0.9
Sales Revenue, Goods, Net											$ 0.2

Revenue (Schedule of New Accoun

Revenue (Schedule of New Accounting Pronouncements) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Item Effected [Line Items]
Net sales	$ 1,851.6	$ 1,877.9	$ 1,763	$ 1,773.2	$ 1,816.7	$ 1,981.4	$ 1,948	$ 1,777.8	$ 7,265.7	$ 7,523.9	$ 7,202.5
Cost of merchandise sold									5,896.2	6,094.9	5,821.6
Merchandise inventory	588.5				654.2				588.5	654.2	658.7
Other current assets	56.6				51.7				56.6	51.7	54.1
Other non-current liabilities	4.7				2.3				4.7	2.3	8.7
Retained Earnings	$ 725.1				$ 694				$ 725.1	$ 694	678.1
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Item Effected [Line Items]
Net sales											7,202.3
Cost of merchandise sold											5,821.6
Merchandise inventory											668.2
Other current assets											54.4
Other non-current liabilities											19.4
Retained Earnings											677.2
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Item Effected [Line Items]
Net sales											0.2
Merchandise inventory											(9.5)
Other current assets											(0.3)
Other non-current liabilities											(10.7)
Retained Earnings											$ 0.9

Revenue (Disaggregation Of Reve

Revenue (Disaggregation Of Revenue) (Details) - Revenue from Contract with Customer [Member]	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Total net sales	100.00%	100.00%	100.00%
Construction
Disaggregation of Revenue [Line Items]
Total net sales	58.10%	58.40%	58.20%
CIG
Disaggregation of Revenue [Line Items]
Total net sales	26.80%	26.50%	26.20%
Industrial & Utility
Disaggregation of Revenue [Line Items]
Total net sales	15.10%	15.10%	15.60%

Cash Discounts And Doubtful A_3

Cash Discounts And Doubtful Accounts (Schedule of Cash Discounts and Doubtful Accounts) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	$ 6.2	$ 5.9	$ 6
Provision (Charged to Expense)	37.7	42.8	36.1
Deductions	(37)	(42.5)	(36.2)
Ending Balance	6.9	6.2	5.9
Allowance for cash discounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	2.2	2.2	2
Provision (Charged to Expense)	35.1	35.8	33.2
Deductions	(34.4)	(35.8)	(33)
Ending Balance	2.9	2.2	2.2
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	4	3.7	4
Provision (Charged to Expense)	2.6	7	2.9
Deductions	(2.6)	(6.7)	(3.2)
Ending Balance	$ 4	$ 4	$ 3.7

Inventory (Narrative) (Details)

Inventory (Narrative) (Details) - USD ($)	12 Months Ended			24 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019
Inventory [Line Items]
Percentage of LIFO Inventory	89.00%	90.00%		90.00%
Excess of Replacement or Current Costs over Stated LIFO Value	$ 227,200,000	$ 186,500,000		$ 186,500,000
Inventory, LIFO Reserve, Effect on Income, Net	4,100,000			0
Inventory Valuation Reserves	8,600,000	9,200,000		$ 9,200,000
Inventory Valuation Reserve
Inventory [Line Items]
Reserves for Obsolete Inventories, Period Increase (Decrease)	$ (600,000)	$ 1,400,000	$ (1,400,000)

Property And Depreciation (Narr

Property And Depreciation (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property And Depreciation [Abstract]
Depreciation	$ 36,700,000	$ 36,100,000	$ 37,300,000
Net book value of assets held for sale	0	100,000
Assets held for sale	4,400,000	0	0
Gain on sale of assets held for sale	3,400,000
Losses on impairment of assets	$ 300,000	$ 300,000	$ 300,000

Property And Depreciation (Sche

Property And Depreciation (Schedule Of Property And Depreciation) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Depreciation	$ 36,700,000	$ 36,100,000	$ 37,300,000
Net book value of assets held for sale	0	100,000
Gain on sale of assets held for sale	3,400,000
Losses on impairment of assets	$ 300,000	$ 300,000	$ 300,000
Building
Property, Plant and Equipment [Line Items]
Estimated useful asset life	42 years
Furniture, Fixtures & Equipment and Software [Member] | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful asset life	3 years
Furniture, Fixtures & Equipment and Software [Member] | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful asset life	14 years

Leases (Narrative) (Details)

Leases (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Operating and finance lease, option to terminate	1 year
Operating lease liabilities	$ 127.1	$ 124.8
Operating lease right-of-use assets	118.8	117.5
Finance lease, net	$ 6.5	$ 8.4
Minimum
Operating lease, remaining lease terms	1 year
Finance lease, remaining lease terms	1 year
Maximum
Operating lease, remaining lease terms	10 years
Finance lease, remaining lease terms	10 years
Operating and finance lease, option to extend	5 years

Leases (Schedule Of Lease Expen

Leases (Schedule Of Lease Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease cost	$ 37.9	$ 33.9
Amortization of right-of-use assets	2.1	2.2
Interest on lease liabilities	0.6	0.7
Total finance lease cost	2.7	2.9
Variable lease cost	10.6	9.5
Total lease cost	$ 51.2	$ 46.3

Leases (Schedule Of Supplementa

Leases (Schedule Of Supplemental Balance Sheet Information) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease right-of-use assets	$ 118.8	$ 117.5
Current operating lease liabilities	31.2	28.6
Non-current operating lease liabilities	95.9	96.2
Total operating lease liabilities	127.1	124.8
Property, at cost	14.6	18.3
Accumulated depreciation and amortization	(8.1)	(9.9)
Net property	6.5	8.4
Current obligations of finance leases	2.3	2.1
Finance leases, net of current obligations	5.7	7.8
Total finance lease liabilities	$ 8	$ 9.9
Weighted average remaining lease term, Operating leases	4 years 8 months 12 days	5 years
Weighted average remaining lease term, Finance leases	4 years 4 months 24 days	5 years 1 month 6 days
Weighted average discount rate, Operating leases	2.90%	3.30%
Weighted average discount rate, Finance leases	7.30%	7.00%

Leases (Schedule Of Supplemen_2

Leases (Schedule Of Supplemental Cash Flow And Other Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 01, 2020
Leases [Abstract]
Operating cash flows from operating leases	$ 37.3	$ 33.5
Operating cash flows from finance leases	0.6	0.7
Financing cash flows from finance leases	2.2	2.1
Right-of-use assets obtained in exchange for lease liabilities, Operating leases	35.3	55.9
Right-of-use assets obtained in exchange for lease liabilities, Finance leases	0.3	2
Finance Lease, Right-of-Use Asset, before Accumulated Amortization	14.6	18.3
Finance Lease, Right-of-Use Asset, Accumulated Amortization	$ 8.1	$ 9.9
Operating leases acquired			$ 1.6

Leases (Schedule Of Maturity Of

Leases (Schedule Of Maturity Of Lease Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
2021, Operating Leases	$ 34.3
2022, Operating Leases	30.8
2023, Operating Leases	24.7
2024, Operating Leases	18.6
2025, Operating Leases	11.9
Thereafter, Operating Leases	15.7
Total future minimum lease payments, Operating Leases	136
Less: imputed interest, Operating Leases	(8.9)
Total operating lease liabilities	127.1	$ 124.8
Less: current obligations, Operating Leases	(31.2)	(28.6)
Long-term lease obligation, Operating Leases	95.9	96.2
2021, Finance Leases	2.8
2022, Finance Leases	2.1
2023, Finance Leases	1.5
2024, Finance Leases	1.3
2025, Finance Leases	0.9
Thereafter, Finance Leases	0.9
Total future minimum lease payments, Finance Leases	9.5
Less: imputed interest, Finance Leases	(1.5)
Total finance lease liabilities	8	9.9
Less: current obligations, Finance Leases	(2.3)	(2.1)
Long-term lease obligation, Finance Leases	$ 5.7	$ 7.8

Goodwill And Other Intangible_3

Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Impairment loss		$ 0.5
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 2.5	$ 2.5	$ 2.6

Goodwill And Other Intangible_4

Goodwill And Other Intangible Assets (Schedule of Goodwill) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)
Goodwill [Roll Forward]
Beginning Balance	$ 30.1
Goodwill Acquired	7
Ending Balance	$ 37.1

Goodwill And Other Intangible_5

Goodwill And Other Intangible Assets (Schedule Of Finite Lived Intangible Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 49.5	$ 31.4
Accumulated Amortization	(12.4)	(9.9)
Total Net Carrying Amount	37.1	21.5
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	30.5	16.7
Accumulated Amortization	(8.4)	(6.7)
Total Net Carrying Amount	$ 22.1	$ 10
Customer Relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Weighted-average useful lives (in years)	8 years 6 months	8 years 6 months
Customer Relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Weighted-average useful lives (in years)	14 years	10 years 9 months 18 days
Trade Names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 18.2	$ 14.3
Accumulated Amortization	(3.6)	(2.8)
Total Net Carrying Amount	$ 14.6	$ 11.5
Trade Names | Minimum
Finite-Lived Intangible Assets [Line Items]
Weighted-average useful lives (in years)	15 years	15 years
Trade Names | Maximum
Finite-Lived Intangible Assets [Line Items]
Weighted-average useful lives (in years)	20 years	20 years
Noncompete Agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 0.7	$ 0.3
Accumulated Amortization	(0.3)	$ (0.3)
Total Net Carrying Amount	$ 0.4
Noncompete Agreements | Minimum
Finite-Lived Intangible Assets [Line Items]
Weighted-average useful lives (in years)	3 years	3 years
Noncompete Agreements | Maximum
Finite-Lived Intangible Assets [Line Items]
Weighted-average useful lives (in years)	7 years	5 years
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 0.1	$ 0.1
Accumulated Amortization	$ (0.1)	$ (0.1)
Weighted-average useful lives (in years)	10 years

Goodwill And Other Intangible_6

Goodwill And Other Intangible Assets (Finite Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Goodwill And Other Intangible Assets [Abstract]
2021	$ 3.7
2022	3.7
2023	3.7
2024	3.6
2025	3.5
After 2025	18.9
Total Net Carrying Amount	$ 37.1	$ 21.5

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Total income tax provision	$ 44.2	$ 55	$ 35.4
Effective tax rate	26.60%	27.50%	19.80%
Statutory federal tax rate	21.00%	21.00%	21.00%
Unrecognized tax benefits	$ 1.7	$ 1.9	$ 2.6
Accrued interest and penalties	0.3	$ 0.4
State and Local Jurisdiction [Member]
Valuation allowance	0.1
Domestic Tax Authority [Member]
Valuation allowance	$ 0.5

Income Taxes (Schedule Of Unrec

Income Taxes (Schedule Of Unrecognized Tax Benefits Roll Forward) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at January 1:	$ 1.9	$ 2.6	$ 2.3
Additions based on tax positions related to current year	0.2	0.2	1.1
Reductions for tax positions of prior years	(0.1)	(0.1)	(0.8)
Settlements	(0.3)	(0.8)
Balance at December 31:	$ 1.7	$ 1.9	$ 2.6

Income Taxes (Schedule Of Effec

Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Statutory federal tax rate	21.00%	21.00%	21.00%
State and local income taxes, net of federal benefit	4.30%	4.50%	3.10%
Deemed repatriation of foreign earnings			(1.00%)
Effect of tax rate changes			(5.10%)
Meals and entertainment	0.50%	1.40%	1.40%
Other, net	0.80%	0.60%	0.40%
Effective tax rate	26.60%	27.50%	19.80%

Income Taxes (Schedule Of Incom

Income Taxes (Schedule Of Income Before Income Tax, Domestic And Foreign) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
Income before Income Taxes, Domestic	$ 151.1	$ 185.1	$ 163.3
Income before Income Taxes, Foreign	15.2	14.8	15.8
Income before Provision for Income Taxes	$ 166.3	$ 199.9	$ 179.1

Income Taxes (Schedule of Compo

Income Taxes (Schedule of Components Of Income Tax Expense Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Provisions for Income Taxes Recorded in the Consolidated Statements of Income [Abstract]
U.S. Federal, current expense	$ 38.5	$ 41.9	$ 20.5
State, current expense	11.4	12.4	6.9
Foreign, current expense	4.5	4.4	4.6
Total current expense	54.4	58.7	32
U.S. Federal, deferred expense	(7.8)	(3)	2.5
State, deferred expense	(2.3)	(0.8)	0.8
Foreign, deferred expense	(0.1)	0.1	0.1
Total deferred (benefit) expense	(10.2)	(3.7)	3.4
Total income tax provision	$ 44.2	$ 55	$ 35.4

Income Taxes (Schedule Of Defer

Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Components of Deferred Tax Assets and Liabilities [Abstract]
Pension	$ 47.2	$ 38.7
Operating lease liabilities	31.3	30.6
Postretirement benefits	20.8	19.6
Inventory	12.3	14.9
Other deferred tax assets	5.2	5
Payroll accruals	7.6	2.9
Bad debt reserves	0.8	1
Subtotal	125.2	112.7
less: valuation allowances	(0.6)	(0.4)
Deferred tax assets	124.6	112.3
Fixed assets	(34.5)	(32.2)
Operating lease right-of-use assets	(29.1)	(28.7)
Other deferred tax liabilities	(4.9)	(4.5)
Computer software	(2.4)	(2.9)
Deferred tax liabilities	(70.9)	(68.3)
Net deferred tax assets	53.7	44
Deferred Tax Assets, Net, Classification [Abstract]
Net deferred tax assets	53.7	44
Other Noncurrent Assets [Member]
Deferred Tax Assets, Net, Classification [Abstract]
Deferred tax assets, included in other non-current assets	54.1	44.5
Other Noncurrent Liabilities [Member]
Deferred Tax Assets, Net, Classification [Abstract]
Deferred tax liabilities included in other non-current liabilities	$ (0.4)	$ (0.5)

Income Taxes (Summary Of Operat

Income Taxes (Summary Of Operating Loss Carryforwards) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract]
U.S. Federal	$ 0.5	$ 0.4
State	$ 0.3	0.3
Foreign		$ 0.1

Capital Stock (Narrative) (Deta

Capital Stock (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Percent of stock owned by active and retired employees	100.00%
Common stock stated value per share	$ 20	$ 20
Cash dvidends	$ 90.7	$ 107.2	$ 46.9
Common stock, subscriptions ( in shares)	1,052,817
Common shares subscribed (in dollars)	$ 21.1
Common stock dividend declared, percent		5.00%	10.00%
Treasury Stock Transactions, Excluding Value of Shares Reissued [Abstract]
Shares of common stock purchased	824,685	962,023	786,754
Shares of common stock retired	830,338	957,495	752,825
Preferred stock shares authorized	10,000,000	10,000,000
Preferred stock par or stated value per share (USD per share)	$ 0.01	$ 0.01
Preferred stock outstanding (in shares)	0	0
2017 Voting Trust | Common Stock
Class of Stock [Line Items]
Percent of shares held in voting trust	83.00%

Net Income Per Share Of Commo_2

Net Income Per Share Of Common Stock (Narrative) (Details) - shares	3 Months Ended				12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net Income Per Share Of Common Stock [Abstract]
Common stock dividend declared, percent						5.00%	10.00%
Average shares outstanding	21,390,053	21,449,751	21,513,493	21,616,141	22,642,057	22,555,240	22,507,701

Debt (Narrative) (Details)

Debt (Narrative) (Details) - USD ($)	Aug. 10, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Line of Credit Facility [Line Items]
Fixed rate debt carrying amount in excess of fair value		$ 1,300,000	$ 1,400,000
Short-term borrowings		50,000,000	138,000,000
Interest expense, net		$ 3,800,000	6,100,000	$ 6,300,000
Revolving Credit Facility
Line of Credit Facility [Line Items]
Weighted average interest rate		1.15%
Letter of Credit
Line of Credit Facility [Line Items]
Letters of credit outstanding		$ 6,300,000	5,600,000
Amended Credit Agreement
Line of Credit Facility [Line Items]
Letters of credit outstanding		400,000	500,000
Amended Credit Agreement | Revolving Credit Facility
Line of Credit Facility [Line Items]
Short-term borrowings		50,000,000	138,000,000
Short-term debt average amount outstanding		191,600,000	$ 151,000,000
Interest rate during the period			3.42%
Debt instrument interest expense		3,600,000	$ 5,500,000	$ 6,900,000
Unused Commitments, Extend Credit		699,600,000	611,500,000
Amended Credit Agreement | Revolving Credit Facility | Minimum
Line of Credit Facility [Line Items]
Short-term borrowings		50,000,000	10,000,000
Amended Credit Agreement | Revolving Credit Facility | Maximum
Line of Credit Facility [Line Items]
Short-term borrowings		$ 370,000,000	257,000,000
Amended Credit Agreement | Revolving Credit Facility | Weighted Average [Member]
Line of Credit Facility [Line Items]
Interest rate during the period		1.55%
Prudential Private Placement Shelf Agreement
Line of Credit Facility [Line Items]
Agreement face amount		$ 100,000,000
Notes issued face amount		0	0
MetLife Private Placement Shelf Agreement
Line of Credit Facility [Line Items]
Agreement face amount		100,000,000
Notes issued face amount		$ 0	$ 0
Line of credit | Revolving Credit Facility | Graybar Canada [Member] | Minimum | Base Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.00%
Line of credit | Revolving Credit Facility | Graybar Canada [Member] | Maximum | Base Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.60%
Line of credit | Amended Credit Agreement
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 750,000,000
Debt instrument, term		5 years
Line of credit | Amended Credit Agreement | Revolving Credit Facility
Line of Credit Facility [Line Items]
Accordian feature, increase limit	$ 375,000,000
Line of credit | Amended Credit Agreement | Revolving Credit Facility | Minimum
Line of Credit Facility [Line Items]
Credit agreement commitment fee percentage	0.25%
Line of credit | Amended Credit Agreement | Revolving Credit Facility | Minimum | Base Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.00%
Line of credit | Amended Credit Agreement | Revolving Credit Facility | Minimum | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.00%
Line of credit | Amended Credit Agreement | Revolving Credit Facility | Maximum
Line of Credit Facility [Line Items]
Credit agreement commitment fee percentage	0.40%
Line of credit | Amended Credit Agreement | Revolving Credit Facility | Maximum | Base Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.60%
Line of credit | Amended Credit Agreement | Revolving Credit Facility | Maximum | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.60%
Line of credit | Amended Credit Agreement | Revolving Credit Facility | Graybar Canada [Member] | Minimum | CDOR [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.00%
Line of credit | Amended Credit Agreement | Revolving Credit Facility | Graybar Canada [Member] | Maximum | CDOR [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.60%
Line of credit | Amended Credit Agreement | Letter of Credit Sub-Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 25,000,000
Line of credit | Amended Credit Agreement | Bridge Loan | Graybar Canada [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity	100,000,000
Line of credit | Amended Credit Agreement | Bridge Loan | UNITED STATES
Line of Credit Facility [Line Items]
Maximum borrowing capacity	75,000,000
Line of credit | Amended Credit Agreement | Bridge Loan | CANADA
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 20,000,000
Line of credit | Amended Credit Agreement | Letter of Credit | Minimum
Line of Credit Facility [Line Items]
Credit agreement commitment fee percentage	1.00%
Line of credit | Amended Credit Agreement | Letter of Credit | Maximum
Line of Credit Facility [Line Items]
Credit agreement commitment fee percentage	1.60%

Debt (Schedule Of Long-term Deb

Debt (Schedule Of Long-term Debt) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Total	$ 8
Less current portion	(2.3)	$ (3.8)
Long-term Debt	5.7	7.8
Capital leases, various maturities, with a weighted average interest rate of 6.16%
Debt Instrument [Line Items]
Total	$ 8	$ 11.6
Weighted average interest rate	7.23%	7.23%

Debt (Schedule Of Long-term D_2

Debt (Schedule Of Long-term Debt Maturities) (Details) $ in Millions	Dec. 31, 2020USD ($)
Long-term Debt matures as follows:
2021	$ 2.3
2022	1.8
2023	1.2
2024	1.2
2025	0.8
After 2025	0.7
Total	$ 8

Pension And Other Postretirem_3

Pension And Other Postretirement Benefits Benefit Obligation (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Vesting percentage			100.00%
Required term of service to be eligible for plan match			1 year 1000 hours
Award vesting period			3 years
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate, Actuarial Present Value	5.00%		5.00%
Estimated nonqualified benefits in next fiscal year			$ 1.6
Non-cash pension settlement charge			27.7
Assets held in postretirement benefits plan	$ 722		722	$ 658.4
Estimated future employer contributions	$ 40		40
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	2.72%	3.38%		4.31%	3.67%
Employer contributions			41.8	$ 11.7
Assets held in postretirement benefits plan	$ 722		722	658.4	$ 588.3
Accumulated benefit obligation	844		$ 844	$ 746.8
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate			3.19%	4.16%	3.44%
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year, Net Periodic Benefit Cost			5.00%	5.00%	5.50%
Employer contributions			$ 4.7	$ 4.4
Assets held in postretirement benefits plan

Pension And Other Postretirem_4

Pension And Other Postretirement Benefits Benefit Obligation (Schedule Of Net Funded Status) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	$ 658.4
Balance, end of year	722	$ 658.4
Paid from Company assets for unfunded nonqualified benefits	1.8	1.7
Pension Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation, beginning of period	825.1	708.8
Service cost	29.2	25.6	$ 28.6
Interest cost	26.7	30	27.3
Actuarial loss (gain)	134.7	117
Benefits paid from plan assets	(2.1)	(52.3)
Benefits paid from Company assets	(1.8)	(1.7)
Plan participants' contributions
Administrative expenses paid	(3.2)	(2.3)
Plan amendments
Settlements	(86.8)
Benefit obligation, end of period	921.8	825.1	708.8
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	658.4	588.3
Actual return on plan assets	115.7	114.7
Employer contributions	41.8	11.7
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant
Benefits paid	(3.9)	(54)
Administrative expenses paid	(3.2)	(2.3)
Settlements	(86.8)
Balance, end of year	722	658.4	588.3
Unfunded status	199.8	166.7
Postretirement Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation, beginning of period	76.2	72.5
Service cost	2.1	2	2.3
Interest cost	2.4	2.9	2.6
Actuarial loss (gain)	4.9	3
Benefits paid from plan assets
Benefits paid from Company assets	(5.8)	(5.8)
Plan participants' contributions	1.1	1.4
Administrative expenses paid
Plan amendments		0.2
Settlements
Benefit obligation, end of period	80.9	76.2	72.5
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year
Actual return on plan assets
Employer contributions	4.7	4.4
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	1.1	1.4
Benefits paid	(5.8)	(5.8)
Administrative expenses paid
Settlements
Balance, end of year
Unfunded status	$ 80.9	$ 76.2

Pension And Other Postretirem_5

Pension And Other Postretirement Benefits (Schedule Of Amounts Recognized In Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Pension Benefits
Liability, Defined Benefit Plan [Abstract]
Current accrued benefit cost	$ 1.9	$ 2.1
Non-current accrued benefit cost	197.9	164.6
Net amount recognized	199.8	166.7
Postretirement Benefits
Liability, Defined Benefit Plan [Abstract]
Current accrued benefit cost	6.8	6.8
Non-current accrued benefit cost	74.1	69.4
Net amount recognized	$ 80.9	$ 76.2

Pension And Other Postretirem_6

Pension And Other Postretirement Benefits (Schedule Of Amounts Recognized In Accumulated Other Comprensive Income (Loss)) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Pension Benefits
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), after Tax [Abstract]
Net actuarial loss	$ 227.9	$ 232.4
Accumulated other comprehensive loss	227.9	232.4
Postretirement Benefits
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), after Tax [Abstract]
Net actuarial loss	13.6	10.4
Prior service cost (gain)	0.1	0.1
Accumulated other comprehensive loss	$ 13.7	$ 10.5

Pension And Other Postretirem_7

Pension And Other Postretirement Benefits (Schedule Of Assumptions Used) (Details)	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Defined Benefit Plan, Healthcare cost trend on covered charges	5.00%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate, Actuarial Present Value	5.00%
Pension Benefits
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	2.62%	3.38%
Rate of compensation increase	4.49%	4.36%
Postretirement Benefits
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	2.22%	3.19%
Defined Benefit Plan, Healthcare cost trend on covered charges	5.00%	5.00%

Pension And Other Postretirem_8

Pension And Other Postretirement Benefits (Schedule Of Net Periodic Benefit Costs) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Total selling, general, and administrative expenses			$ 1,098.9	$ 1,159.9	$ 1,125
Total non-operating expenses			58.5	23.7	30.6
Pension Benefits
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost			29.2	25.6	28.6
Total selling, general, and administrative expenses			29.2	25.6	28.6
Interest cost			26.7	30	27.3
Expected return on plan assets			(32.8)	(34.1)	(31.9)
Net actuarial loss			30.2	19.1	26.5
Prior service cost (gain)					0.3
Settlement charge			27.7
Total non-operating expenses			51.8	15	22.2
Net periodic benefit cost			$ 81	$ 40.6	$ 50.8
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	2.72%	3.38%		4.31%	3.67%
Expected return on plan assets			5.50%	5.75%	5.75%
Rate of compensation increase			4.24%	4.36%	4.49%
Postretirement Benefits
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost			$ 2.1	$ 2	$ 2.3
Total selling, general, and administrative expenses			2.1	2	2.3
Interest cost			2.4	2.9	2.6
Net actuarial loss				0.3	0.9
Prior service cost (gain)			0.7		(2)
Total non-operating expenses			3.1	3.2	1.5
Net periodic benefit cost			$ 5.2	$ 5.2	$ 3.8
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate			3.19%	4.16%	3.44%
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year, Net Periodic Benefit Cost			5.00%	5.00%	5.50%
Defined Benefit Plan Ultimate Health Care Cost Trend Rate For Benefit Obligation, Net Periodic Benefit Cost					5.00%

Pension And Other Postretirem_9

Pension And Other Postretirement Benefits (Schedule Of Expected Benefit Payments) (Details) $ in Millions	Dec. 31, 2020USD ($)
Pension Benefits
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2021	$ 64
2022	61.5
2023	63.7
2024	61.7
2025	62.1
2026 to 2030	301.8
Postretirement Benefits
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2021	6.9
2022	7.2
2023	7.4
2024	7.5
2025	7.4
2026 to 2030	$ 32.8

Pension And Other Postretire_10

Pension And Other Postretirement Benefits (Schedule Of Allocation Of Plan Assets) (Details)	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Actual Allocation	100.00%	100.00%
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	100.00%	100.00%
Equity Securities - U.S.
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Actual Allocation	7.00%	6.00%
Equity Securities - International
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Actual Allocation	10.00%	9.00%
Fixed Income Investments
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Actual Allocation	66.00%	68.00%
Hedge Funds
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Actual Allocation	5.00%	5.00%
Private Markets
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Actual Allocation	4.00%	4.00%
Other
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Actual Allocation	7.00%	8.00%
Short-term Investments
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Actual Allocation	1.00%	0.00%
Minimum | Equity Securities - U.S.
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	3.00%	3.00%
Minimum | Equity Securities - International
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	2.00%	2.00%
Minimum | Fixed Income Investments
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	40.00%	40.00%
Minimum | Hedge Funds
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	2.00%	2.00%
Minimum | Private Markets
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	0.00%	0.00%
Minimum | Other
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	0.00%	0.00%
Minimum | Short-term Investments
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	1.00%	1.00%
Maximum | Equity Securities - U.S.
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	10.00%	10.00%
Maximum | Equity Securities - International
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	10.00%	10.00%
Maximum | Fixed Income Investments
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	80.00%	80.00%
Maximum | Hedge Funds
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	8.00%	8.00%
Maximum | Private Markets
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	15.00%	15.00%
Maximum | Other
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	14.00%	14.00%
Maximum | Short-term Investments
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	10.00%	10.00%

Pension And Other Postretire_11

Pension And Other Postretirement Benefits (Schedule Of Changes In Fair Value Of Plan Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	$ 658.4	$ 658.4
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	658.4
Balance, end of year	722	658.4
Investments Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	416.5	416.5
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	416.5
Balance, end of year	437.1	416.5
Quoted Prices in Active Markets for Identical Inputs (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	219.5	219.5
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	219.5
Balance, end of year	259.7	219.5
Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	25.2	10.4
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	22.4	10.4
Realized gains/(losses)		0.1
Unrealized gains/(losses)	1.6	1.5
Purchases	2.5	11.2
Sales	(1.3)	(0.8)
Balance, end of year	25.2	22.4
Equity Securities - U.S.
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	40	40
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	40
Balance, end of year	47.9	40
Equity Securities - U.S. | Investments Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	14	14
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	14
Balance, end of year	17.3	14
Equity Securities - U.S. | Quoted Prices in Active Markets for Identical Inputs (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	26	26
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	26
Balance, end of year	30.6	26
Equity Securities - International
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	58.6	58.6
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	58.6
Balance, end of year	70.3	58.6
Equity Securities - International | Investments Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	20.7	20.7
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	20.7
Balance, end of year	24.9	20.7
Equity Securities - International | Quoted Prices in Active Markets for Identical Inputs (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	37.9	37.9
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	37.9
Balance, end of year	45.4	37.9
Fixed Income Investments
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	447.9	447.9
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	447.9
Balance, end of year	479.9	447.9
Fixed Income Investments | Investments Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	312.7	312.7
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	312.7
Balance, end of year	317.4	312.7
Fixed Income Investments | Quoted Prices in Active Markets for Identical Inputs (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	135.2	135.2
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	135.2
Balance, end of year	162.5	135.2
Hedge Funds
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	32	32
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	32
Balance, end of year	36	32
Hedge Funds | Investments Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	32	32
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	32
Balance, end of year	36	32
Private Markets
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	28	28
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	28
Balance, end of year	29.4	28
Private Markets | Investments Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	17	17
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	17
Balance, end of year	15.6	17
Private Markets | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	13.8	6
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	11	6
Realized gains/(losses)		0.1
Unrealized gains/(losses)	1	0.7
Purchases	2.5	4.4
Sales	(0.7)	(0.2)
Balance, end of year	13.8	11
Other
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	49.5	49.5
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	49.5
Balance, end of year	54.7	49.5
Other | Investments Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	17.7	17.7
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	17.7
Balance, end of year	22.1	17.7
Other | Quoted Prices in Active Markets for Identical Inputs (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	20.4	20.4
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	20.4
Balance, end of year	21.2	20.4
Other | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	11.4	4.4
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	11.4	4.4
Realized gains/(losses)
Unrealized gains/(losses)	0.6	0.8
Purchases		6.8
Sales	(0.6)	(0.6)
Balance, end of year	11.4	11.4
Short-term Investments
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	2.4	2.4
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	2.4
Balance, end of year	3.8	2.4
Short-term Investments | Investments Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan fair value of plan assets measured at net asset value	2.4	2.4
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Balance, beginning of year	2.4
Balance, end of year	$ 3.8	$ 2.4

Profit Sharing And Savings Pl_2

Profit Sharing And Savings Plan (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended			48 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jun. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Required term of service to be eligible for plan match	6 months 500 hours			1 year 1000 hours
Profit Sharing and Savings Plan
Defined Benefit Plan Disclosure [Line Items]
Voluntary contribution, minimum percent of employee pay	2.00%
Voluntary contribution, maximum percent of employee pay	50.00%
Percentage of employee contribution matched by employer	50.00%
Percent of employee pay eligible for matching contributions	6.00%
Employer matching contribution percentage maximum of pay	3.00%
Employer Matching Contribution	$ 3.8	$ 2.7	$ 1.8
Discretionary Employer Contribution	$ 46.8	$ 56.8	$ 67.4

Commitments And Contingencies (

Commitments And Contingencies (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Commitments And Contingencies [Abstract]
Rent expense	$ 40.3	$ 36.4	$ 29.4

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Capital Stock [Abstract]
Adoption of ASU 2018-02	$ (725.1)	$ (694)	$ (678.1)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Loss (Components of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Currency translation	$ (5.1)	$ (7.7)
Adoption of ASU 2018-02	(725.1)	(694)	$ (678.1)
Accumulated Other Comprehensive Loss	(246.7)	(250.6)
Pension Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Benefits liability	(227.9)	(232.4)
Accumulated Other Comprehensive Loss	(227.9)	(232.4)
Postretirement Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Benefits liability	$ (13.7)	$ (10.5)

Accumulated Other Comprehensi_5

Accumulated Other Comprehensive Loss (Reclassifications Out Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Non-operating expenses	$ 58.5	$ 23.7	$ 30.6
Tax benefit	44.2	55	35.4
Total reclassifications for the period, net of tax	(122.1)	(144.9)	$ (143.7)
Non-cash pension settlement charge	27.7
Reclassification out of AOCI | Actuarial Losses Recognized
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Non-operating expenses	58.6	19.4
Tax benefit	(15.1)	(5)
Total reclassifications for the period, net of tax	$ 43.5	$ 14.4

Accumulated Other Comprehensi_6

Accumulated Other Comprehensive Loss (Changes In Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 892.9
Retained Earnings	725.1	$ 694	$ 678.1
Ending balance	930.5	892.9
Foreign Currency
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(7.7)	(12.4)
Other comprehensive income before reclassifications	2.6	4.7
Amounts reclassified from accumulated other comprehensive loss (net of tax $(15.1) and $(5.0))
Actuarial loss, (net of tax $14.6 and $10.2)
Net current-period other comprehensive income (loss)	2.6	4.7
Ending balance	(5.1)	(7.7)
Pension and Other Postretirement Benefits
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(242.9)	(227.9)
Other comprehensive income before reclassifications
Amounts reclassified from accumulated other comprehensive loss (net of tax $(15.1) and $(5.0))	43.5	14.4
Actuarial loss, (net of tax $14.6 and $10.2)	(42.2)	(29.4)
Net current-period other comprehensive income (loss)	1.3	(15)
Ending balance	(241.6)	(242.9)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(250.6)	(240.3)
Other comprehensive income before reclassifications	2.6	4.7
Amounts reclassified from accumulated other comprehensive loss (net of tax $(15.1) and $(5.0))	43.5	14.4
Actuarial loss, (net of tax $14.6 and $10.2)	(42.2)	(29.4)
Net current-period other comprehensive income (loss)	3.9	(10.3)
Ending balance	$ (246.7)	$ (250.6)

Acquisition (Narrative) (Detail

Acquisition (Narrative) (Details) - USD ($) $ in Millions	Dec. 01, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill		$ 37.1	$ 30.1	$ 30.1
Shingle & Gibb Automation, LLC [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	$ 27.2
Goodwill	7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 18.1

Quarterly Financial Informati_3

Quarterly Financial Information (Unaudited) (Schedule Of Quarterly Financial Information (Unaudited)) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information (Unaudited) [Abstract]
Net sales	$ 1,851.6	$ 1,877.9	$ 1,763	$ 1,773.2	$ 1,816.7	$ 1,981.4	$ 1,948	$ 1,777.8	$ 7,265.7	$ 7,523.9	$ 7,202.5
Gross margin	340.6	355.2	333.3	340.4	344.8	377.8	367.7	338.7	1,369.5	1,429	1,380.9
Net income (loss) attributable to the Company	$ 28.8	$ 34.5	$ 37.1	$ 21.4	$ 14.4	$ 48.8	$ 47	$ 34.3	$ 121.8	$ 144.5	$ 143.3
Net income (loss) attributable to the Company per share of common stock (usd per share)	$ 1.28	$ 1.52	$ 1.64	$ 0.94	$ 0.65	$ 2.17	$ 2.08	$ 1.51	$ 5.38	$ 6.41	$ 6.37
Common stock dividend declared, percent										5.00%	10.00%
Average common shares outstanding by quarter					21,390,053	21,449,751	21,513,493	21,616,141	22,642,057	22,555,240	22,507,701