Fastenal (FAST) 10-Q 16 Jul 19 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Jul. 10, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2019
Document Transition Report	false
Entity File Number	0-16125
Entity Registrant Name	FASTENAL CO
Entity Central Index Key	0000815556
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Incorporation, State or Country Code	MN
Entity Tax Identification Number	41-0948415
Entity Address, Address Line One	2001 Theurer Boulevard
Entity Address, City or Town	Winona
Entity Address, State or Province	MN
Entity Address, Postal Zip Code	55987-1500
City Area Code	507
Local Phone Number	454-5374
Title of 12(b) Security	Common stock, par value $.01 per share
Trading Symbol	FAST
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		573,430,436

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 175	$ 167.2
Trade accounts receivable, net of allowance for doubtful accounts of $11.4 and $12.8, respectively	819.8	714.3
Inventories	1,345.7	1,278.7
Prepaid income taxes	4	9
Other current assets	123.8	147
Total current assets	2,468.3	2,316.2
Property and equipment, net	975.1	924.8
Operating lease right-of-use assets	234.5	0
Other assets	78.5	80.5
Total assets	3,756.4	3,321.5
Current liabilities:
Current portion of debt	3	3
Accounts payable	203.8	193.6
Accrued expenses	226	240.8
Current portion of operating lease liabilities	95.1	0
Total current liabilities	527.9	437.4
Long-term debt	497	497
Operating lease liabilities	141.1	0
Deferred income taxes	86.7	84.4
Stockholders' equity:
Preferred stock: $0.01 par value, 5,000,000 shares authorized, no shares issued or outstanding	0	0
Common stock: $0.01 par value, 800,000,000 shares authorized, 573,396,959 and 571,803,838 shares issued and outstanding, respectively	2.9	2.9
Additional paid-in capital	46	3
Retained earnings	2,494.2	2,341.6
Accumulated other comprehensive loss	(39.4)	(44.8)
Total stockholders' equity	2,503.7	2,302.7
Total liabilities and stockholders' equity	$ 3,756.4	$ 3,321.5

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Trade accounts receivable, allowance for doubtful accounts	$ 11.4	$ 12.8
Preferred stock
Par value (in dollars per share)	$ 0.01	$ 0.01
Authorized (in shares)	5,000,000	5,000,000
Issued (in shares)	0	0
Outstanding (in shares)	0	0
Common stock
Par value (in dollars per share)	$ 0.01	$ 0.01
Authorized (in shares)	800,000,000	800,000,000
Issued (in shares)	573,396,959	571,803,838
Outstanding (in shares)	573,396,959	571,803,838

Condensed Consolidated Statemen

Condensed Consolidated Statements of Earnings - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Net sales	$ 1,368.4	$ 1,267.9	$ 2,677.7	$ 2,453.7
Cost of sales	727.2	650.2	1,411.8	1,258.4
Gross profit	641.2	617.7	1,265.9	1,195.3
Operating and administrative expenses	366.7	349.3	730.3	692
Gain on sale of property and equipment	(0.5)	(0.6)	(0.8)	(0.2)
Operating income	275	269	536.4	503.5
Interest income	0.1	0.1	0.2	0.2
Interest expense	(3.7)	(3.2)	(7.7)	(5.9)
Earnings before income taxes	271.4	265.9	528.9	497.8
Income tax expense	66.8	54.7	130.2	112.3
Net earnings	$ 204.6	$ 211.2	$ 398.7	$ 385.5
Basic net earnings per share (in dollars per share)	$ 0.36	$ 0.37	$ 0.70	$ 0.67
Diluted net earnings per share (in dollars per share)	$ 0.36	$ 0.37	$ 0.69	$ 0.67
Basic weighted average shares outstanding (in shares)	573,159,138	574,280,852	572,669,693	574,783,228
Diluted weighted average shares outstanding (in shares)	574,551,349	574,514,974	573,775,059	575,118,936

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net earnings	$ 204.6	$ 211.2	$ 398.7	$ 385.5
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments (net of tax of $0.0 in 2019 and 2018)	1.7	(12.8)	5.4	(10.8)
Comprehensive income	$ 206.3	$ 198.4	$ 404.1	$ 374.7

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Foreign currency translation adjustments, tax	$ 0	$ 0	$ 0	$ 0

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss)
Balance at beginning of period at Dec. 31, 2017		$ 2.9	$ 8.5	$ 2,110.6	$ (25.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised			5.6
Purchases of common stock			(16.2)	(24.2)
Stock-based compensation			2.5
Net earnings	$ 385.5			385.5
Dividends paid in cash				(212.7)
Other comprehensive income (loss)					(10.8)
Balance at end of period at Jun. 30, 2018	$ 2,226.6	2.9	0.4	2,259.2	(35.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per share of common stock (in dollars per share)	$ 0.370
Balance at beginning of period at Mar. 31, 2018		2.9	13.7	2,178.5	(23.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised			1.8
Purchases of common stock			(16.2)	(24.2)
Stock-based compensation			1.1
Net earnings	$ 211.2			211.2
Dividends paid in cash				(106.3)
Other comprehensive income (loss)					(12.8)
Balance at end of period at Jun. 30, 2018	$ 2,226.6	2.9	0.4	2,259.2	(35.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per share of common stock (in dollars per share)	$ 0.185
Balance at beginning of period at Dec. 31, 2018	$ 2,302.7	2.9	3	2,341.6	(44.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised			40.1
Purchases of common stock			0	0
Stock-based compensation			2.9
Net earnings	398.7			398.7
Dividends paid in cash				(246.1)
Other comprehensive income (loss)					5.4
Balance at end of period at Jun. 30, 2019	$ 2,503.7	2.9	46	2,494.2	(39.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per share of common stock (in dollars per share)	$ 0.430
Balance at beginning of period at Mar. 31, 2019		2.9	22.7	2,412.7	(41.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised			22
Purchases of common stock			0	0
Stock-based compensation			1.3
Net earnings	$ 204.6			204.6
Dividends paid in cash				(123.1)
Other comprehensive income (loss)					1.7
Balance at end of period at Jun. 30, 2019	$ 2,503.7	$ 2.9	$ 46	$ 2,494.2	$ (39.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per share of common stock (in dollars per share)	$ 0.215

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net earnings	$ 398.7	$ 385.5
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation of property and equipment	71.5	65.5
Gain on sale of property and equipment	(0.8)	(0.2)
Bad debt expense	3.1	2.7
Deferred income taxes	2.3	19.4
Stock-based compensation	2.9	2.5
Amortization of intangible assets	2	2
Changes in operating assets and liabilities:
Trade accounts receivable	(106.4)	(132)
Inventories	(64.3)	(75)
Other current assets	23.2	10
Accounts payable	10.2	24.6
Accrued expenses	(14.8)	10.4
Income taxes	5	(4.5)
Other	0.4	0.7
Net cash provided by operating activities	333	311.6
Cash flows from investing activities:
Purchases of property and equipment	(123.1)	(60.6)
Proceeds from sale of property and equipment	3.5	6.8
Other	0	(0.1)
Net cash used in investing activities	(119.6)	(53.9)
Cash flows from financing activities:
Proceeds from debt obligations	525	415
Payments against debt obligations	(525)	(405)
Proceeds from exercise of stock options	40.1	5.6
Purchases of common stock	0	(40.4)
Payments of dividends	(246.1)	(212.7)
Net cash used in financing activities	(206)	(237.5)
Effect of exchange rate changes on cash and cash equivalents	0.4	(1.6)
Net increase in cash and cash equivalents	7.8	18.6
Cash and cash equivalents at beginning of period	167.2	116.9
Cash and cash equivalents at end of period	175	135.5
Supplemental disclosure of cash flow information:
Cash paid for interest	7.8	5.9
Net cash paid for income taxes	$ 122.3	$ 96.8

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	(1) Basis of Presentation The accompanying unaudited condensed consolidated financial statements of Fastenal Company and subsidiaries (collectively referred to as the company, Fastenal, or by terms such as we, our, or us) have been prepared in accordance with U.S. generally accepted accounting principles ('GAAP') for interim financial information. They do not include all information and footnotes required by U.S. GAAP for complete financial statements. However, except as described herein, there has been no material change in the information disclosed in the Notes to Consolidated Financial Statements included in our consolidated financial statements as of and for the year ended December 31, 2018 . In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Stock Split On April 17, 2019, the board of directors approved a two -for-one stock split of the company's outstanding common stock. Holders of the company's common stock, par value $0.01 per share, at the close of business on May 2, 2019, received one additional share of common stock for every share of common stock they owned. The stock split took effect at the close of business on May 22, 2019. All historical common stock share and per share information for all periods presented in the accompanying condensed consolidated financial statements and notes thereto have been retroactively adjusted to reflect the stock split. Recently Adopted Accounting Pronouncements Effective January 1, 2019, we adopted the Financial Accounting Standards Board ('FASB') Accounting Standards Update ('ASU') 2016-02, Leases , which requires the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous guidance. The original guidance required application on a modified retrospective basis with the earliest period presented. In August 2018, the FASB issued ASU 2018-11, Targeted Improvements to ASC 842 , which included an option to not restate comparative periods in transition and elect to use the effective date of ASC 842, Leases , as the date of initial application of transition, which we elected. As a result of the adoption of ASC 842 on January 1, 2019, we recorded both operating lease right-of-use ('ROU') assets of $227.5 and lease liabilities of $228.3 . The adoption of ASC 842 had an immaterial impact on our Condensed Consolidated Statement of Earnings and Condensed Consolidated Statement of Cash Flows for both the six-month and three-month periods ended June 30, 2019. In addition, we elected the package of practical expedients permitted under the transition guidance within the new standard which allowed us to carry forward the historical lease classification. Additional information and disclosures required by this new standard are contained in Note 5, 'Operating Leases'

Revenue

Revenue	6 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue	(2) Revenue Revenue Recognition Net sales include products and shipping and handling charges, net of estimates for product returns and any related sales incentives. Revenue is measured as the amount of consideration we expect to receive in exchange for transferring products. All revenue is recognized when we satisfy our performance obligations under the contract. We recognize revenue by transferring the promised products to the customer, with the majority of revenue recognized at the point in time the customer obtains control of the products. We recognize revenue for shipping and handling charges at the time the products are delivered to or picked up by the customer. We estimate product returns based on historical return rates. Using probability assessments, we estimate sales incentives expected to be paid over the term of the contract. The majority of our contracts have a single performance obligation and are short term in nature. Sales taxes and value added taxes in foreign jurisdictions that are collected from customers and remitted to governmental authorities are accounted for on a net basis and therefore are excluded from net sales. Disaggregation of Revenue Our revenues related to the following geographic areas were as follows for the periods ended June 30 : Six-month Period Three-month Period 2019 2018 2019 2018 United States $ 2,297.7 2,121.1 $ 1,172.9 1,092.6 All foreign countries 380.0 332.6 195.5 175.3 Total revenues $ 2,677.7 2,453.7 $ 1,368.4 1,267.9 The percentages of our sales by end market were as follows for the periods ended June 30 : Six-month Period Three-month Period 2019 2018 2019 2018 Manufacturing 67.5 % 66.8 % 67.3 % 66.6 % Non-residential construction 12.9 % 12.9 % 13.2 % 13.2 % Other 19.6 % 20.3 % 19.5 % 20.2 % 100.0 % 100.0 % 100.0 % 100.0 % The percentages of our sales by product line were as follows for the periods ended June 30 : Six-month Period Three-month Period Type Introduced 2019 2018 2019 2018 Fasteners (1) 1967 34.7 % 35.2 % 34.5 % 35.4 % Tools 1993 9.9 % 10.0 % 9.8 % 9.9 % Cutting tools 1996 5.8 % 5.7 % 5.8 % 5.6 % Hydraulics & pneumatics 1996 6.9 % 6.9 % 6.8 % 6.9 % Material handling 1996 5.9 % 5.8 % 5.9 % 5.9 % Janitorial supplies 1996 7.6 % 7.5 % 7.7 % 7.6 % Electrical supplies 1997 4.7 % 4.7 % 4.7 % 4.6 % Welding supplies 1997 4.2 % 4.2 % 4.2 % 4.1 % Safety supplies 1999 17.4 % 16.9 % 17.5 % 16.9 % Other 2.9 % 3.1 % 3.1 % 3.1 % 100.0 % 100.0 % 100.0 % 100.0 % (1) The fasteners product line represents fasteners and miscellaneous supplies.

Stockholders' Equity

Stockholders' Equity	6 Months Ended
	Jun. 30, 2019
Stockholders' Equity Note [Abstract]
Stockholders' Equity	(3) Stockholders' Equity Dividends On July 10, 2019 , our board of directors declared a dividend of $0.22 per share of common stock to be paid in cash on August 22, 2019 to shareholders of record at the close of business on July 25, 2019 . Since 2011, we have paid quarterly dividends. Our board of directors intends to continue paying quarterly dividends, provided that any future determination as to payment of dividends will depend on the financial condition and results of operations of the company and such other factors as are deemed relevant by the board of directors. The following table presents the dividends either paid previously or declared by our board of directors for future payment on a per share basis: 2019 2018 First quarter $ 0.215 0.185 Second quarter 0.215 0.185 Third quarter 0.220 0.200 Fourth quarter 0.200 Total $ 0.650 0.770 Stock Options The following tables summarize the details of options granted under our stock option plans that were still outstanding as of June 30, 2019 , and the assumptions used to value these grants. All such grants were effective at the close of business on the date of grant. Options Granted Option Exercise (Strike) Price Closing Stock Price on Date of Grant June 30, 2019 Date of Grant Options Outstanding Options Exercisable January 2, 2019 1,316,924 $ 26.00 $ 25.705 1,303,670 29,010 January 2, 2018 1,087,936 $ 27.50 $ 27.270 1,033,248 42,370 January 3, 2017 1,529,578 $ 23.50 $ 23.475 1,247,616 371,622 April 19, 2016 1,690,880 $ 23.00 $ 22.870 1,286,260 327,170 April 21, 2015 1,786,440 $ 21.00 $ 20.630 975,939 463,383 April 22, 2014 1,910,000 $ 28.00 $ 25.265 743,716 494,356 April 16, 2013 410,000 $ 27.00 $ 24.625 118,094 76,844 April 17, 2012 2,470,000 $ 27.00 $ 24.505 872,358 764,306 April 19, 2011 820,000 $ 17.50 $ 15.890 56,300 56,300 Total 13,021,758 7,637,201 2,625,361 Date of Grant Risk-free Interest Rate Expected Life of Option in Years Expected Dividend Yield Expected Stock Volatility Estimated Fair Value of Stock Option January 2, 2019 2.5 % 5.00 2.9 % 23.96 % $ 4.40 January 2, 2018 2.2 % 5.00 2.3 % 23.45 % $ 5.02 January 3, 2017 1.9 % 5.00 2.6 % 24.49 % $ 4.20 April 19, 2016 1.3 % 5.00 2.6 % 26.34 % $ 4.09 April 21, 2015 1.3 % 5.00 2.7 % 26.84 % $ 3.68 April 22, 2014 1.8 % 5.00 2.0 % 28.55 % $ 4.79 April 16, 2013 0.7 % 5.00 1.6 % 37.42 % $ 6.33 April 17, 2012 0.9 % 5.00 1.4 % 39.25 % $ 6.85 April 19, 2011 2.1 % 5.00 1.6 % 39.33 % $ 5.60 All of the options in the tables above vest and become exercisable over a period of up to eight years . Generally, each option will terminate approximately nine years after the grant date. The fair value of each share-based option is estimated on the date of grant using a Black-Scholes valuation method that uses the assumptions listed above. The risk-free interest rate is based on the U.S. Treasury rate over the expected life of the option at the time of grant. The expected life is the average length of time over which we expect the employee groups will exercise their options, which is based on historical experience with similar grants. The dividend yield is estimated over the expected life of the option based on our current dividend payout, historical dividends paid, and expected future cash dividends. Expected stock volatilities are based on the movement of our stock price over the most recent historical period equivalent to the expected life of the option. Compensation expense equal to the grant date fair value is recognized for all of these awards over the vesting period. The stock-based compensation expense for the six -month periods ended June 30, 2019 and 2018 was $2.9 and $2.5 , respectively. Unrecognized stock-based compensation expense related to outstanding unvested stock options as of June 30, 2019 was $15.7 and is expected to be recognized over a weighted average period of 4.12 years . Any future changes in estimated forfeitures will impact this amount. Earnings Per Share The following tables present a reconciliation of the denominators used in the computation of basic and diluted earnings per share and a summary of the options to purchase shares of common stock which were excluded from the diluted earnings per share calculation because they were anti-dilutive: Six-month Period Three-month Period Reconciliation 2019 2018 2019 2018 Basic weighted average shares outstanding 572,669,693 574,783,228 573,159,138 574,280,852 Weighted shares assumed upon exercise of stock options 1,105,366 335,708 1,392,211 234,122 Diluted weighted average shares outstanding 573,775,059 575,118,936 574,551,349 574,514,974 Six-month Period Three-month Period Summary of Anti-dilutive Options Excluded 2019 2018 2019 2018 Options to purchase shares of common stock 450,960 5,581,260 — 6,113,644 Weighted average exercise prices of options $ 27.53 26.43 $ — 26.09

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	(4) Income Taxes Fastenal files income tax returns in the United States federal jurisdiction, all states, and various local and foreign jurisdictions. With limited exceptions, we are no longer subject to income tax examinations by taxing authorities for taxable years before 2016 in the case of United States federal examinations, and 2015 in the case of foreign, state, and local examinations. During the first six months of 2019, there were no material changes in unrecognized tax benefits.

Operating Leases

Operating Leases	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Operating Leases	(5) Operating Leases We lease space under non-cancelable operating leases for several distribution centers, several manufacturing locations, and certain branch locations. These leases do not have significant rent escalation holidays, concessions, leasehold improvement incentives, or other build-out clauses. Further, the leases do not contain contingent rent provisions. We also lease certain semi-tractors, pick-up trucks, and computer equipment under operating leases. Many of our leases include both lease (e.g., fixed payments including rent, taxes, and insurance costs) and non-lease components (e.g., common-area or other maintenance costs) which are accounted for as a single lease component as we have elected the practical expedient to group lease and non-lease components for all leases. Our pick-up truck leases typically have a non-cancelable lease term of less than one year and therefore, we have elected the practical expedient to exclude these short-term leases from our ROU assets and lease liabilities. Most leases include one or more options to renew. The exercise of lease renewal options is typically at our sole discretion; therefore, the majority of renewals to extend the lease terms are not included in our ROU assets and lease liabilities as they are not reasonably certain of exercise. We regularly evaluate the renewal options and when they are reasonably certain of exercise, we include the renewal period in our lease term. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at the lease commencement date in determining the present value of the lease payments. We have a centrally managed treasury function; therefore, based on the applicable lease terms and the current economic environment, we apply a portfolio approach for determining the incremental borrowing rate. Certain operating leases for pick-up trucks contain residual value guarantee provisions which would generally become due at the expiration of the operating lease agreement if the fair value of the leased vehicles is less than the guaranteed residual value. The aggregate residual value guarantee related to these leases was approximately $91.8 . We believe the likelihood of funding the guarantee obligation under any provision of the operating lease agreements is remote. To the extent our fleet contains vehicles we estimate will settle at a gain, such gains on these vehicles will be recognized when we sell the vehicle. The cost components of our operating leases were as follows for the periods ended June 30, 2019: Six-month Period Three-month Period Leased Facilities and Equipment Leased Vehicles Total Leased Facilities and Equipment Leased Vehicles Total Operating lease cost $ 51.8 6.6 58.4 $ 26.1 3.5 29.6 Variable lease cost 5.5 1.0 6.5 2.2 0.6 2.8 Short-term lease cost — 13.5 13.5 — 6.2 6.2 Total $ 57.3 21.1 78.4 $ 28.3 10.3 38.6 Variable lease costs consist primarily of taxes, insurance, and common area or other maintenance costs for our leased facilities and equipment which are paid based on actual costs incurred by the lessor as well as variable mileage costs related to our leased vehicles. Maturities of our lease liabilities for all operating leases are as follows as of June 30, 2019: Leased Facilities and Equipment Leased Vehicles Total 2019 $ 42.9 6.2 49.1 2020 77.6 9.2 86.8 2021 52.0 5.0 57.0 2022 29.5 2.6 32.1 2023 15.4 0.9 16.3 2024 and thereafter 7.2 0.2 7.4 Total lease payments $ 224.6 24.1 248.7 Less: Interest (11.6 ) (0.9 ) (12.5 ) Present value of lease liabilities $ 213.0 23.2 236.2 The weighted average remaining lease terms and discount rates for all of our operating leases were as follows as of June 30, 2019: Remaining lease term and discount rate: June 30, 2019 Weighted average remaining lease term (years) Leased facilities and equipment 3.08 Leased vehicles 2.63 Weighted average discount rate Lease facilities and equipment 3.36% Leased vehicles 3.21% Supplemental cash flow information related to our operating leases was as follows for the period ended June 30, 2019: Six-month Period Cash paid for amounts included in the measurement of lease liabilities: Operating cash outflow from operating leases $ 57.6 Leased assets obtained in exchange for new operating lease liabilities 57.4

Debt Commitments

Debt Commitments	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Debt Commitments	6) Debt Commitments Credit Facility, Notes Payable, and Commitments Debt obligations and letters of credit outstanding at the end of each period consisted of the following: June 30, 2019 December 31, 2018 Outstanding loans under unsecured revolving credit facility $ 365.0 365.0 2.00% Senior unsecured promissory note payable 40.0 40.0 2.45% Senior unsecured promissory note payable 35.0 35.0 3.22% Senior unsecured promissory note payable 60.0 60.0 Total debt 500.0 500.0 Less: Current portion of debt (3.0 ) (3.0 ) Long-term debt $ 497.0 497.0 Outstanding letters of credit under unsecured revolving credit facility - contingent obligation $ 36.3 36.3 Unsecured Revolving Credit Facility We have a $700.0 committed unsecured revolving credit facility ('Credit Facility'). The Credit Facility includes a committed letter of credit subfacility of $55.0 . The commitments under the Credit Facility will expire (and any borrowings outstanding under the Credit Facility will become due and payable) on November 30, 2023 . In the next twelve months, we have the ability and intent to repay a portion of the outstanding loans using cash; therefore, we have classified this portion as a current liability. The Credit Facility contains certain financial and other covenants, and our right to borrow under the Credit Facility is conditioned upon, among other things, our compliance with these covenants. We are currently in compliance with these covenants. Borrowings under the Credit Facility generally bear interest at a rate per annum equal to the London Interbank Offered Rate (' LIBOR ') for interest periods of various lengths selected by us, plus 0.95% . Based on the interest periods we have chosen, our weighted per annum interest rate at June 30, 2019 was approximately 3.4% . We pay a commitment fee for the unused portion of the Credit Facility. This fee is either 0.10% or 0.125% per annum based on our usage of the Credit Facility. Senior Unsecured Promissory Notes Payable We have issued senior unsecured promissory notes under our master note agreement (the 'Master Note Agreement') in the aggregate principal amount of $135.0 . Our aggregate borrowing capacity under the Master Note Agreement is $600.0 ; however, none of the institutional investors party to that agreement are committed to purchase notes thereunder. The notes currently issued under our Master Note Agreement consist of three series. The first is in an aggregate principal amount of $40.0 , bears interest at a fixed rate of 2.00% per annum, and is due and payable on July 20, 2021. The second is in an aggregate principal amount of $35.0 , bears interest at a fixed rate of 2.45% per annum, and is due and payable on July 20, 2022. The third is in an aggregate principal amount of $60.0 , bears interest at a fixed rate of 3.22% per annum, and is due and payable on March 1, 2024. There is no amortization of these notes prior to their maturity date and interest is payable quarterly.

Legal Contingencies

Legal Contingencies	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Legal Contingencies	(7) Legal Contingencies The nature of our potential exposure to legal contingencies is described in our 2018 annual report on Form 10-K in Note 10 of the Notes to Consolidated Financial Statements. As of June 30, 2019 , there were no litigation matters that we consider to be probable or reasonably possible to have a material adverse outcome.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	(8) Subsequent Events We evaluated all subsequent event activity and concluded that no subsequent events have occurred that would require recognition in the condensed consolidated financial statements or disclosure in the Notes to Condensed Consolidated Financial Statements, with the exception of the dividend declaration disclosed in Note 3 'Stockholders' Equity'.

Basis of Presentation (Policies

Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	The accompanying unaudited condensed consolidated financial statements of Fastenal Company and subsidiaries (collectively referred to as the company, Fastenal, or by terms such as we, our, or us) have been prepared in accordance with U.S. generally accepted accounting principles ('GAAP') for interim financial information. They do not include all information and footnotes required by U.S. GAAP for complete financial statements. However, except as described herein, there has been no material change in the information disclosed in the Notes to Consolidated Financial Statements included in our consolidated financial statements as of and for the year ended December 31, 2018 . In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements Effective January 1, 2019, we adopted the Financial Accounting Standards Board ('FASB') Accounting Standards Update ('ASU') 2016-02, Leases , which requires the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous guidance. The original guidance required application on a modified retrospective basis with the earliest period presented. In August 2018, the FASB issued ASU 2018-11, Targeted Improvements to ASC 842 , which included an option to not restate comparative periods in transition and elect to use the effective date of ASC 842, Leases , as the date of initial application of transition, which we elected. As a result of the adoption of ASC 842 on January 1, 2019, we recorded both operating lease right-of-use ('ROU') assets of $227.5 and lease liabilities of $228.3 . The adoption of ASC 842 had an immaterial impact on our Condensed Consolidated Statement of Earnings and Condensed Consolidated Statement of Cash Flows for both the six-month and three-month periods ended June 30, 2019. In addition, we elected the package of practical expedients permitted under the transition guidance within the new standard which allowed us to carry forward the historical lease classification. Additional information and disclosures required by this new standard are contained in Note 5, 'Operating Leases' .
Revenue Recognition	Net sales include products and shipping and handling charges, net of estimates for product returns and any related sales incentives. Revenue is measured as the amount of consideration we expect to receive in exchange for transferring products. All revenue is recognized when we satisfy our performance obligations under the contract. We recognize revenue by transferring the promised products to the customer, with the majority of revenue recognized at the point in time the customer obtains control of the products. We recognize revenue for shipping and handling charges at the time the products are delivered to or picked up by the customer. We estimate product returns based on historical return rates. Using probability assessments, we estimate sales incentives expected to be paid over the term of the contract. The majority of our contracts have a single performance obligation and are short term in nature. Sales taxes and value added taxes in foreign jurisdictions that are collected from customers and remitted to governmental authorities are accounted for on a net basis and therefore are excluded from net sales.
Lease and Nonlease Components	Many of our leases include both lease (e.g., fixed payments including rent, taxes, and insurance costs) and non-lease components (e.g., common-area or other maintenance costs) which are accounted for as a single lease component as we have elected the practical expedient to group lease and non-lease components for all leases.
Short-term Leases	Our pick-up truck leases typically have a non-cancelable lease term of less than one year and therefore, we have elected the practical expedient to exclude these short-term leases from our ROU assets and lease liabilities.
Lessee, Leases	Most leases include one or more options to renew. The exercise of lease renewal options is typically at our sole discretion; therefore, the majority of renewals to extend the lease terms are not included in our ROU assets and lease liabilities as they are not reasonably certain of exercise. We regularly evaluate the renewal options and when they are reasonably certain of exercise, we include the renewal period in our lease term.

Revenue (Tables)

Revenue (Tables)	6 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	Our revenues related to the following geographic areas were as follows for the periods ended June 30 : Six-month Period Three-month Period 2019 2018 2019 2018 United States $ 2,297.7 2,121.1 $ 1,172.9 1,092.6 All foreign countries 380.0 332.6 195.5 175.3 Total revenues $ 2,677.7 2,453.7 $ 1,368.4 1,267.9 The percentages of our sales by end market were as follows for the periods ended June 30 : Six-month Period Three-month Period 2019 2018 2019 2018 Manufacturing 67.5 % 66.8 % 67.3 % 66.6 % Non-residential construction 12.9 % 12.9 % 13.2 % 13.2 % Other 19.6 % 20.3 % 19.5 % 20.2 % 100.0 % 100.0 % 100.0 % 100.0 % The percentages of our sales by product line were as follows for the periods ended June 30 : Six-month Period Three-month Period Type Introduced 2019 2018 2019 2018 Fasteners (1) 1967 34.7 % 35.2 % 34.5 % 35.4 % Tools 1993 9.9 % 10.0 % 9.8 % 9.9 % Cutting tools 1996 5.8 % 5.7 % 5.8 % 5.6 % Hydraulics & pneumatics 1996 6.9 % 6.9 % 6.8 % 6.9 % Material handling 1996 5.9 % 5.8 % 5.9 % 5.9 % Janitorial supplies 1996 7.6 % 7.5 % 7.7 % 7.6 % Electrical supplies 1997 4.7 % 4.7 % 4.7 % 4.6 % Welding supplies 1997 4.2 % 4.2 % 4.2 % 4.1 % Safety supplies 1999 17.4 % 16.9 % 17.5 % 16.9 % Other 2.9 % 3.1 % 3.1 % 3.1 % 100.0 % 100.0 % 100.0 % 100.0 % (1) The fasteners product line represents fasteners and miscellaneous supplies.

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2019
Stockholders' Equity Note [Abstract]
Schedule of Dividends Paid Previously or Declared	The following table presents the dividends either paid previously or declared by our board of directors for future payment on a per share basis: 2019 2018 First quarter $ 0.215 0.185 Second quarter 0.215 0.185 Third quarter 0.220 0.200 Fourth quarter 0.200 Total $ 0.650 0.770
Stock Options Granted	The following tables summarize the details of options granted under our stock option plans that were still outstanding as of June 30, 2019 , and the assumptions used to value these grants. All such grants were effective at the close of business on the date of grant. Options Granted Option Exercise (Strike) Price Closing Stock Price on Date of Grant June 30, 2019 Date of Grant Options Outstanding Options Exercisable January 2, 2019 1,316,924 $ 26.00 $ 25.705 1,303,670 29,010 January 2, 2018 1,087,936 $ 27.50 $ 27.270 1,033,248 42,370 January 3, 2017 1,529,578 $ 23.50 $ 23.475 1,247,616 371,622 April 19, 2016 1,690,880 $ 23.00 $ 22.870 1,286,260 327,170 April 21, 2015 1,786,440 $ 21.00 $ 20.630 975,939 463,383 April 22, 2014 1,910,000 $ 28.00 $ 25.265 743,716 494,356 April 16, 2013 410,000 $ 27.00 $ 24.625 118,094 76,844 April 17, 2012 2,470,000 $ 27.00 $ 24.505 872,358 764,306 April 19, 2011 820,000 $ 17.50 $ 15.890 56,300 56,300 Total 13,021,758 7,637,201 2,625,361
Fair Value Assumptions for Options Granted	Date of Grant Risk-free Interest Rate Expected Life of Option in Years Expected Dividend Yield Expected Stock Volatility Estimated Fair Value of Stock Option January 2, 2019 2.5 % 5.00 2.9 % 23.96 % $ 4.40 January 2, 2018 2.2 % 5.00 2.3 % 23.45 % $ 5.02 January 3, 2017 1.9 % 5.00 2.6 % 24.49 % $ 4.20 April 19, 2016 1.3 % 5.00 2.6 % 26.34 % $ 4.09 April 21, 2015 1.3 % 5.00 2.7 % 26.84 % $ 3.68 April 22, 2014 1.8 % 5.00 2.0 % 28.55 % $ 4.79 April 16, 2013 0.7 % 5.00 1.6 % 37.42 % $ 6.33 April 17, 2012 0.9 % 5.00 1.4 % 39.25 % $ 6.85 April 19, 2011 2.1 % 5.00 1.6 % 39.33 % $ 5.60
Reconciliation of Denominators used in Computation of Basic and Diluted Earnings Per Share	The following tables present a reconciliation of the denominators used in the computation of basic and diluted earnings per share and a summary of the options to purchase shares of common stock which were excluded from the diluted earnings per share calculation because they were anti-dilutive: Six-month Period Three-month Period Reconciliation 2019 2018 2019 2018 Basic weighted average shares outstanding 572,669,693 574,783,228 573,159,138 574,280,852 Weighted shares assumed upon exercise of stock options 1,105,366 335,708 1,392,211 234,122 Diluted weighted average shares outstanding 573,775,059 575,118,936 574,551,349 574,514,974
Anti-Dilutive Options Excluded	Six-month Period Three-month Period Summary of Anti-dilutive Options Excluded 2019 2018 2019 2018 Options to purchase shares of common stock 450,960 5,581,260 — 6,113,644 Weighted average exercise prices of options $ 27.53 26.43 $ — 26.09

Operating Leases (Tables)

Operating Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Cost Components of Operating Leases, Weighted Average Lease Terms, and Discount Rates	The cost components of our operating leases were as follows for the periods ended June 30, 2019: Six-month Period Three-month Period Leased Facilities and Equipment Leased Vehicles Total Leased Facilities and Equipment Leased Vehicles Total Operating lease cost $ 51.8 6.6 58.4 $ 26.1 3.5 29.6 Variable lease cost 5.5 1.0 6.5 2.2 0.6 2.8 Short-term lease cost — 13.5 13.5 — 6.2 6.2 Total $ 57.3 21.1 78.4 $ 28.3 10.3 38.6 The weighted average remaining lease terms and discount rates for all of our operating leases were as follows as of June 30, 2019: Remaining lease term and discount rate: June 30, 2019 Weighted average remaining lease term (years) Leased facilities and equipment 3.08 Leased vehicles 2.63 Weighted average discount rate Lease facilities and equipment 3.36% Leased vehicles 3.21%
Maturities of Lease Liabilities	Maturities of our lease liabilities for all operating leases are as follows as of June 30, 2019: Leased Facilities and Equipment Leased Vehicles Total 2019 $ 42.9 6.2 49.1 2020 77.6 9.2 86.8 2021 52.0 5.0 57.0 2022 29.5 2.6 32.1 2023 15.4 0.9 16.3 2024 and thereafter 7.2 0.2 7.4 Total lease payments $ 224.6 24.1 248.7 Less: Interest (11.6 ) (0.9 ) (12.5 ) Present value of lease liabilities $ 213.0 23.2 236.2
Supplemental Cash Flow Information	Supplemental cash flow information related to our operating leases was as follows for the period ended June 30, 2019: Six-month Period Cash paid for amounts included in the measurement of lease liabilities: Operating cash outflow from operating leases $ 57.6 Leased assets obtained in exchange for new operating lease liabilities 57.4

Debt Commitments (Tables)

Debt Commitments (Tables)	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Schedule of Debt Obligations and Letters of Credit Outstanding	Debt obligations and letters of credit outstanding at the end of each period consisted of the following: June 30, 2019 December 31, 2018 Outstanding loans under unsecured revolving credit facility $ 365.0 365.0 2.00% Senior unsecured promissory note payable 40.0 40.0 2.45% Senior unsecured promissory note payable 35.0 35.0 3.22% Senior unsecured promissory note payable 60.0 60.0 Total debt 500.0 500.0 Less: Current portion of debt (3.0 ) (3.0 ) Long-term debt $ 497.0 497.0 Outstanding letters of credit under unsecured revolving credit facility - contingent obligation $ 36.3 36.3

Basis of Presentation (Details)

Basis of Presentation (Details) $ / shares in Units, $ in Millions	May 22, 2019$ / sharesshares	Jun. 30, 2019USD ($)$ / sharesshares	Jan. 01, 2019USD ($)	Dec. 31, 2018USD ($)$ / sharesshares
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Two-for-one stock split	2
Par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01		$ 0.01
Issued, additional (in shares) | shares	1	573,396,959		571,803,838
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets		$ 234.5		$ 0
Operating lease liabilities		$ 236.2
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets			$ 227.5
Operating lease liabilities			$ 228.3

Revenue - Revenues by Geographi

Revenue - Revenues by Geographic Areas (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues by Geographic Areas [Line Items]
Total revenues	$ 1,368.4	$ 1,267.9	$ 2,677.7	$ 2,453.7
United States
Revenues by Geographic Areas [Line Items]
Total revenues	1,172.9	1,092.6	2,297.7	2,121.1
All foreign countries
Revenues by Geographic Areas [Line Items]
Total revenues	$ 195.5	$ 175.3	$ 380	$ 332.6

Revenue - Percentages of Sales

Revenue - Percentages of Sales by End Market (Details) - End Market - Sales	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Percentage of Sales by End Market [Line Items]
Percentage of sales	100.00%	100.00%	100.00%	100.00%
Manufacturing
Percentage of Sales by End Market [Line Items]
Percentage of sales	67.30%	66.60%	67.50%	66.80%
Non-residential construction
Percentage of Sales by End Market [Line Items]
Percentage of sales	13.20%	13.20%	12.90%	12.90%
Other
Percentage of Sales by End Market [Line Items]
Percentage of sales	19.50%	20.20%	19.60%	20.30%

Revenue - Percentages of Sale_2

Revenue - Percentages of Sales by Product Line (Details) - Product Line - Sales	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Percentage of Sales by Product Line [Line Items]
Percentage of sales	100.00%	100.00%	100.00%	100.00%
Fasteners
Percentage of Sales by Product Line [Line Items]
Percentage of sales	34.50%	35.40%	34.70%	35.20%
Tools
Percentage of Sales by Product Line [Line Items]
Percentage of sales	9.80%	9.90%	9.90%	10.00%
Cutting tools
Percentage of Sales by Product Line [Line Items]
Percentage of sales	5.80%	5.60%	5.80%	5.70%
Hydraulics & pneumatics
Percentage of Sales by Product Line [Line Items]
Percentage of sales	6.80%	6.90%	6.90%	6.90%
Material handling
Percentage of Sales by Product Line [Line Items]
Percentage of sales	5.90%	5.90%	5.90%	5.80%
Janitorial supplies
Percentage of Sales by Product Line [Line Items]
Percentage of sales	7.70%	7.60%	7.60%	7.50%
Electrical supplies
Percentage of Sales by Product Line [Line Items]
Percentage of sales	4.70%	4.60%	4.70%	4.70%
Welding supplies
Percentage of Sales by Product Line [Line Items]
Percentage of sales	4.20%	4.10%	4.20%	4.20%
Safety Supplies
Percentage of Sales by Product Line [Line Items]
Percentage of sales	17.50%	16.90%	17.40%	16.90%
Other
Percentage of Sales by Product Line [Line Items]
Percentage of sales	3.10%	3.10%	2.90%	3.10%

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	Jul. 10, 2019	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Subsequent Event [Line Items]
Dividend declared (in dollars per share)		$ 0.215	$ 0.185	$ 0.430	$ 0.370
Share-based Compensation [Abstract]
Options vesting and exercisable period, maximum				8 years
Options termination period				9 years
Total stock-based compensation expense				$ 2.9	$ 2.5
Total unrecognized stock-based compensation expense		$ 15.7		$ 15.7
Weighted average period over which total unrecognized stock-based compensation expense will be recognized				4 years 1 month 13 days
Subsequent Event
Subsequent Event [Line Items]
Dividend declared (in dollars per share)	$ 0.22

Stockholders' Equity - Schedule

Stockholders' Equity - Schedule of Dividends Paid Previously or Declared (Details) - $ / shares	3 Months Ended							12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Dividends Per Share [Line Items]
Dividends paid (in dollars per share)		$ 0.215	$ 0.215	$ 0.200	$ 0.200	$ 0.185	$ 0.185		$ 0.770
Forecast
Dividends Per Share [Line Items]
Dividends paid (in dollars per share)	$ 0.220							$ 0.650

Stockholders' Equity - Stock Op

Stockholders' Equity - Stock Options Granted (Details)	98 Months Ended
	Jun. 30, 2019$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted (in shares)	13,021,758
Options Outstanding (in shares)	7,637,201
Options Exercisable (in shares)	2,625,361
January 2, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted (in shares)	1,316,924
Option Exercise (Strike) Price (in dollars per share) | $ / shares	$ 26
Closing Stock Price on Date of Grant (in dollars per share) | $ / shares	$ 25.705
Options Outstanding (in shares)	1,303,670
Options Exercisable (in shares)	29,010
January 2, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted (in shares)	1,087,936
Option Exercise (Strike) Price (in dollars per share) | $ / shares	$ 27.50
Closing Stock Price on Date of Grant (in dollars per share) | $ / shares	$ 27.270
Options Outstanding (in shares)	1,033,248
Options Exercisable (in shares)	42,370
January 3, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted (in shares)	1,529,578
Option Exercise (Strike) Price (in dollars per share) | $ / shares	$ 23.50
Closing Stock Price on Date of Grant (in dollars per share) | $ / shares	$ 23.475
Options Outstanding (in shares)	1,247,616
Options Exercisable (in shares)	371,622
April 19, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted (in shares)	1,690,880
Option Exercise (Strike) Price (in dollars per share) | $ / shares	$ 23
Closing Stock Price on Date of Grant (in dollars per share) | $ / shares	$ 22.870
Options Outstanding (in shares)	1,286,260
Options Exercisable (in shares)	327,170
April 21, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted (in shares)	1,786,440
Option Exercise (Strike) Price (in dollars per share) | $ / shares	$ 21
Closing Stock Price on Date of Grant (in dollars per share) | $ / shares	$ 20.630
Options Outstanding (in shares)	975,939
Options Exercisable (in shares)	463,383
April 22, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted (in shares)	1,910,000
Option Exercise (Strike) Price (in dollars per share) | $ / shares	$ 28
Closing Stock Price on Date of Grant (in dollars per share) | $ / shares	$ 25.265
Options Outstanding (in shares)	743,716
Options Exercisable (in shares)	494,356
April 16, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted (in shares)	410,000
Option Exercise (Strike) Price (in dollars per share) | $ / shares	$ 27
Closing Stock Price on Date of Grant (in dollars per share) | $ / shares	$ 24.625
Options Outstanding (in shares)	118,094
Options Exercisable (in shares)	76,844
April 17, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted (in shares)	2,470,000
Option Exercise (Strike) Price (in dollars per share) | $ / shares	$ 27
Closing Stock Price on Date of Grant (in dollars per share) | $ / shares	$ 24.505
Options Outstanding (in shares)	872,358
Options Exercisable (in shares)	764,306
April 19, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted (in shares)	820,000
Option Exercise (Strike) Price (in dollars per share) | $ / shares	$ 17.50
Closing Stock Price on Date of Grant (in dollars per share) | $ / shares	$ 15.890
Options Outstanding (in shares)	56,300
Options Exercisable (in shares)	56,300

Stockholders' Equity - Fair Val

Stockholders' Equity - Fair Value Assumptions for Options Granted (Details)	6 Months Ended
	Jun. 30, 2019$ / shares
January 2, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free Interest Rate	2.50%
Expected Life of Option in Years	5 years
Expected Dividend Yield	2.90%
Expected Stock Volatility	23.96%
Estimated Fair Value of Stock Option (in dollars per share)	$ 4.40
January 2, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free Interest Rate	2.20%
Expected Life of Option in Years	5 years
Expected Dividend Yield	2.30%
Expected Stock Volatility	23.45%
Estimated Fair Value of Stock Option (in dollars per share)	$ 5.02
January 3, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free Interest Rate	1.90%
Expected Life of Option in Years	5 years
Expected Dividend Yield	2.60%
Expected Stock Volatility	24.49%
Estimated Fair Value of Stock Option (in dollars per share)	$ 4.20
April 19, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free Interest Rate	1.30%
Expected Life of Option in Years	5 years
Expected Dividend Yield	2.60%
Expected Stock Volatility	26.34%
Estimated Fair Value of Stock Option (in dollars per share)	$ 4.09
April 21, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free Interest Rate	1.30%
Expected Life of Option in Years	5 years
Expected Dividend Yield	2.70%
Expected Stock Volatility	26.84%
Estimated Fair Value of Stock Option (in dollars per share)	$ 3.68
April 22, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free Interest Rate	1.80%
Expected Life of Option in Years	5 years
Expected Dividend Yield	2.00%
Expected Stock Volatility	28.55%
Estimated Fair Value of Stock Option (in dollars per share)	$ 4.79
April 16, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free Interest Rate	0.70%
Expected Life of Option in Years	5 years
Expected Dividend Yield	1.60%
Expected Stock Volatility	37.42%
Estimated Fair Value of Stock Option (in dollars per share)	$ 6.33
April 17, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free Interest Rate	0.90%
Expected Life of Option in Years	5 years
Expected Dividend Yield	1.40%
Expected Stock Volatility	39.25%
Estimated Fair Value of Stock Option (in dollars per share)	$ 6.85
April 19, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free Interest Rate	2.10%
Expected Life of Option in Years	5 years
Expected Dividend Yield	1.60%
Expected Stock Volatility	39.33%
Estimated Fair Value of Stock Option (in dollars per share)	$ 5.60

Stockholders' Equity - Reconcil

Stockholders' Equity - Reconciliation of Denominators used in Computation of Basic and Diluted Earnings Per Share (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Stockholders' Equity Note [Abstract]
Basic weighted average shares outstanding (in shares)	573,159,138	574,280,852	572,669,693	574,783,228
Weighted shares assumed upon exercise of stock options (in shares)	1,392,211	234,122	1,105,366	335,708
Diluted weighted average shares outstanding (in shares)	574,551,349	574,514,974	573,775,059	575,118,936

Stockholders' Equity - Summary

Stockholders' Equity - Summary of Anti-Dilutive Options Excluded (Details) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Stockholders' Equity Note [Abstract]
Options to purchase shares of common stock (in shares)	0	6,113,644	450,960	5,581,260
Weighted average exercise prices of options (in dollars per share)	$ 0	$ 26.09	$ 27.53	$ 26.43

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019USD ($)
Income Tax Disclosure [Abstract]
Material changes in unrecognized tax benefits	$ 0

Operating Leases - Additional I

Operating Leases - Additional Information (Details) - Pick-up trucks $ in Millions	Jun. 30, 2019USD ($)
Property Subject to or Available for Operating Lease [Line Items]
Non-cancelable lease term (less than)	1 year
Aggregate residual value guarantee of pick-up leases	$ 91.8

Operating Leases - Cost Compone

Operating Leases - Cost Components of Operating Leases (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 29.6	$ 58.4
Variable lease cost	2.8	6.5
Short-term lease cost	6.2	13.5
Total	38.6	78.4
Leased Facilities and Equipment
Lessee, Lease, Description [Line Items]
Operating lease cost	26.1	51.8
Variable lease cost	2.2	5.5
Short-term lease cost	0	0
Total	28.3	57.3
Leased Vehicles
Lessee, Lease, Description [Line Items]
Operating lease cost	3.5	6.6
Variable lease cost	0.6	1
Short-term lease cost	6.2	13.5
Total	$ 10.3	$ 21.1

Operating Leases - Maturities o

Operating Leases - Maturities of Lease Liabilities (Details) $ in Millions	Jun. 30, 2019USD ($)
Lessee, Lease, Description [Line Items]
2019	$ 49.1
2020	86.8
2021	57
2022	32.1
2023	16.3
2024 and thereafter	7.4
Total lease payments	248.7
Less: Interest	(12.5)
Present value of lease liabilities	236.2
Leased Facilities and Equipment
Lessee, Lease, Description [Line Items]
2019	42.9
2020	77.6
2021	52
2022	29.5
2023	15.4
2024 and thereafter	7.2
Total lease payments	224.6
Less: Interest	(11.6)
Present value of lease liabilities	213
Leased Vehicles
Lessee, Lease, Description [Line Items]
2019	6.2
2020	9.2
2021	5
2022	2.6
2023	0.9
2024 and thereafter	0.2
Total lease payments	24.1
Less: Interest	(0.9)
Present value of lease liabilities	$ 23.2

Operating Leases - Weighted Ave

Operating Leases - Weighted Average Lease Term and Discount Rates (Details)	Jun. 30, 2019
Leased Facilities and Equipment
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term (years)	3 years 29 days
Weighted average discount rate	3.36%
Leased Vehicles
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term (years)	2 years 7 months 17 days
Weighted average discount rate	3.21%

Operating Leases - Supplemental

Operating Leases - Supplemental Cash Flow Information (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash outflow from operating leases	$ 57.6
Leased assets obtained in exchange for new operating lease liabilities	$ 57.4

Debt Commitments - Debt Obligat

Debt Commitments - Debt Obligations and Letters of Credit Outstanding (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total debt	$ 500	$ 500
Less: Current portion of debt	(3)	(3)
Long-term debt	497	497
Credit Facility | Unsecured Revolving Credit Facility
Debt Instrument [Line Items]
Total debt	365	365
Credit Facility | Letter of Credit Subfacility
Debt Instrument [Line Items]
Outstanding letters of credit under unsecured revolving credit facility - contingent obligation	36.3	36.3
Senior Unsecured Promissory Notes | 2.00% Senior Unsecured Promissory Note Payable
Debt Instrument [Line Items]
Total debt	$ 40	40
Fixed interest rate per annum	2.00%
Senior Unsecured Promissory Notes | 2.45% Senior Unsecured Promissory Note Payable
Debt Instrument [Line Items]
Total debt	$ 35	35
Fixed interest rate per annum	2.45%
Senior Unsecured Promissory Notes | 3.22% Senior Unsecured Promissory Note Payable
Debt Instrument [Line Items]
Total debt	$ 60	$ 60
Fixed interest rate per annum	3.22%

Debt Commitments - Unsecured Re

Debt Commitments - Unsecured Revolving Credit Facility (Details) - Credit Facility	6 Months Ended
	Jun. 30, 2019USD ($)
Debt Instrument [Line Items]
Weighted per annum interest rate on outstanding line of credit	3.40%
Minimum
Debt Instrument [Line Items]
Percentage fee paid for unused portion of credit facility	0.10%
Maximum
Debt Instrument [Line Items]
Percentage fee paid for unused portion of credit facility	0.125%
LIBOR
Debt Instrument [Line Items]
Per annum interest rate over LIBOR	0.95%
Unsecured Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	$ 700,000,000
Letter of Credit Subfacility
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	$ 55,000,000

Debt Commitments - Senior Unsec

Debt Commitments - Senior Unsecured Promissory Notes Payable (Details) - Senior Unsecured Promissory Notes	Jun. 30, 2019USD ($)debt_instrument_series
Debt Instrument [Line Items]
Debt issuance, aggregate principal amount	$ 135,000,000
Maximum aggregate borrowing capacity	$ 600,000,000
Number of debt instrument series | debt_instrument_series	3
2.00% Senior Unsecured Promissory Note Payable
Debt Instrument [Line Items]
Debt issuance, aggregate principal amount	$ 40,000,000
Fixed interest rate per annum	2.00%
2.45% Senior Unsecured Promissory Note Payable
Debt Instrument [Line Items]
Debt issuance, aggregate principal amount	$ 35,000,000
Fixed interest rate per annum	2.45%
3.22% Senior Unsecured Promissory Note Payable
Debt Instrument [Line Items]
Debt issuance, aggregate principal amount	$ 60,000,000
Fixed interest rate per annum	3.22%