Tiffany & Co (TIF) 10-K16 Mar 182017 FY Annual reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
Document and Entity Information - USD ($)	Jan. 31, 2018	Mar. 12, 2018	Jul. 31, 2017
Document Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jan. 31, 2018
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Trading Symbol	TIF
Entity Registrant Name	TIFFANY & CO
Entity Central Index Key	98,246
Current Fiscal Year End Date	--01-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		124,398,512
Entity Public Float			$ 11,993,601,775

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Jan. 31, 2018	Jan. 31, 2017
Current assets:
Cash and cash equivalents	$ 970.7	$ 928
Short-term investments	320.5	57.8
Accounts receivable, less allowances of $17.2 and $11.5	231.2	226.8
Inventories, net	2,253.5	2,157.6
Prepaid expenses and other current assets	207.4	203.4
Total current assets	3,983.3	3,573.6
Property, plant and equipment, net	990.5	931.8
Deferred income taxes	188.2	301.8
Other assets, net	306.1	290.4
Total Assets	5,468.1	5,097.6
Current liabilities:
Short-term borrowings	120.6	228.7
Accounts payable and accrued liabilities	437.4	312.8
Income taxes payable	89.4	22.1
Merchandise credits and deferred revenue	77.4	69.2
Total current liabilities	724.8	632.8
Long-term debt	882.9	878.4
Pension/postretirement benefit obligations	287.4	318.6
Deferred gains on sale-leasebacks	40.5	45.9
Other long-term liabilities	284.3	193.5
Commitments and contingencies
Stockholders' equity:
Preferred Stock, $0.01 par value; authorized 2.0 shares, none issued and outstanding	0	0
Common Stock, $0.01 par value; authorized 240.0 shares, issued and outstanding 124.5 and 124.5	1.2	1.2
Additional paid-in capital	1,256	1,190.2
Retained earnings	2,114.2	2,078.3
Accumulated other comprehensive loss, net of tax	(138)	(256.2)
Total Tiffany & Co. stockholders' equity	3,233.4	3,013.5
Non-controlling interests	14.8	14.9
Total stockholders' equity	3,248.2	3,028.4
Total Liabilities and Stockholders' Equity	$ 5,468.1	$ 5,097.6

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Millions, $ in Millions	Jan. 31, 2018	Jan. 31, 2017
Allowance for doubtful accounts receivable, current	$ 17.2	$ 11.5
Preferred Stock, par value	$ 0.01	$ 0.01
Preferred Stock, shares authorized	2	2
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	240	240
Common Stock, shares issued	124.5	124.5
Common Stock, shares outstanding	124.5	124.5

CONSOLIDATED STATEMENTS OF EARN

CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Income Statement [Abstract]
Net sales	$ 4,169.8	$ 4,001.8	$ 4,104.9
Cost of sales	1,565.1	1,511.5	1,613.6
Gross profit	2,604.7	2,490.3	2,491.3
Selling, general and administrative expenses	1,810.2	1,769.1	1,731.2
Earnings from operations	794.5	721.2	760.1
Interest expense and financing costs	42	46	49
Other (income) expense, net	(8)	(1.4)	1.2
Earnings from operations before income taxes	760.5	676.6	709.9
Provision for income taxes	390.4	230.5	246
Net earnings	$ 370.1	$ 446.1	$ 463.9
Net earnings per share:
Basic	$ 2.97	$ 3.57	$ 3.61
Diluted	$ 2.96	$ 3.55	$ 3.59
Weighted-average number of common shares:
Basic	124.5	125.1	128.6
Diluted	125.1	125.5	129.1

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Statement of Comprehensive Income [Abstract]
Net earnings	$ 370.1	$ 446.1	$ 463.9
Other comprehensive earnings (loss), net of tax
Foreign currency translation adjustments	95.7	(8.4)	(59)
Unrealized (loss) gain on marketable securities	(2.6)	1.8	(2.9)
Unrealized (loss) gain on hedging instruments	(6.8)	10.7	(21.4)
Unrealized gain on benefit plans	31.9	17.8	95.7
Other comprehensive earnings, net of tax	118.2	21.9	12.4
Comprehensive earnings	$ 488.3	$ 468	$ 476.3

CONSOLIDATED STATEMENT OF STOCK

CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions	Total	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Non-controlling Interests [Member]
Beginning Balances at Jan. 31, 2015	$ 2,850.7	$ 1,950.7	$ (290.5)	$ 1.3	$ 1,173.6	$ 15.6
Beginning Balance, Shares at Jan. 31, 2015				129.3
Exercise of stock options and vesting of restricted stock units ("RSUs")	0.3	0	0	$ 0	0.3	0
Exercise of stock options and vesting of restricted stock units ("RSUs"), shares				0.3
Tax benefit from exercise of stock options and vesting of RSUs	2.1	0	0	$ 0	2.1	0
Share-based compensation expense	24.8	0	0	0	24.8	0
Purchase and retirement of Common Stock, Value	$ (220.4)	(198.7)	0	$ 0	(21.7)	0
Purchase and retirement of Common Stock, Shares	(2.8)			(2.8)
Cash dividends on Common Stock	$ (203.4)	(203.4)	0	$ 0	0	0
Other comprehensive earnings, net of tax	12.4	0	12.4	0	0	0
Net earnings	463.9	463.9	0	0	0	0
Redemption of non-controlling interest	(2.2)	0	0	0	(3.4)	1.2
Non-controlling interests	1.3	0	0	0	0	1.3
Ending Balances at Jan. 31, 2016	2,929.5	2,012.5	(278.1)	$ 1.3	1,175.7	18.1
Ending Balance, Shares at Jan. 31, 2016				126.8
Exercise of stock options and vesting of restricted stock units ("RSUs")	12.5	0	0	$ 0	12.5	0
Exercise of stock options and vesting of restricted stock units ("RSUs"), shares				0.5
Tax deficiency from exercise of stock options and vesting of RSUs	(0.5)	0	0	$ 0	(0.5)	0
Share-based compensation expense	24.5	0	0	0	24.5	0
Purchase and retirement of Common Stock, Value	$ (183.6)	(161.5)	0	$ (0.1)	(22)	0
Purchase and retirement of Common Stock, Shares	(2.8)			(2.8)
Cash dividends on Common Stock	$ (218.8)	(218.8)	0	$ 0	0	0
Other comprehensive earnings, net of tax	21.9	0	21.9	0	0	0
Net earnings	446.1	446.1	0	0	0	0
Non-controlling interests	(3.2)	0	0	0	0	(3.2)
Ending Balances at Jan. 31, 2017	$ 3,028.4	2,078.3	(256.2)	$ 1.2	1,190.2	14.9
Ending Balance, Shares at Jan. 31, 2017	124.5			124.5
Exercise of stock options and vesting of restricted stock units ("RSUs")	$ 54.6	0	0	$ 0	54.6	0
Exercise of stock options and vesting of restricted stock units ("RSUs"), shares				1.1
Shares withheld related to net share settlement of share-based compensation	(8.6)	0	0	$ 0	(8.6)	0
Shares Paid for Tax Withholding for Share Based Compensation				(0.1)
Share-based compensation expense	28.2	0	0	$ 0	28.2	0
Purchase and retirement of Common Stock, Value	$ (99.2)	(90.8)	0	$ 0	(8.4)	0
Purchase and retirement of Common Stock, Shares	(1)			(1)
Cash dividends on Common Stock	$ (242.6)	(242.6)	0	$ 0	0	0
Dividends, Share-based Compensation	(0.8)	0.8	0	0	0	0
Other comprehensive earnings, net of tax	118.2	0	118.2	0	0	0
Net earnings	370.1	370.1	0	0	0	0
Non-controlling interests	(0.1)	0	0	0	0	(0.1)
Ending Balances at Jan. 31, 2018	$ 3,248.2	$ 2,114.2	$ (138)	$ 1.2	$ 1,256	$ 14.8
Ending Balance, Shares at Jan. 31, 2018	124.5			124.5

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 370.1	$ 446.1	$ 463.9
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	206.9	208.5	202.5
Amortization of gain on sale-leasebacks	(8.2)	(8.5)	(8.3)
Provision for inventories	28.9	19.2	25.4
Deferred income taxes	96.8	46.1	(1.9)
Provision for pension/postretirement benefits	35	45.4	65.8
Share-based compensation expense	28	24.3	24.5
Loan impairment charges	3	12.6	37.9
Asset impairment charges	10	25.4	0
Gains on sales of marketable securities	(3.5)	0	0
Changes in assets and liabilities:
Accounts receivable	7	(19.2)	(16.7)
Inventories	(52.9)	54.8	63.7
Prepaid expenses and other current assets	(28.8)	33.6	1.1
Other assets, net	(3.7)	0.8	(17.5)
Accounts payable and accrued liabilities	98.8	(21.7)	(13.7)
Income taxes payable	149.7	(39.3)	3.1
Merchandise credits and deferred revenue	6.2	1.5	3
Other long term liabilities	(11.1)	(123.9)	(15.4)
Net cash provided by operating activities	932.2	705.7	817.4
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of marketable securities and short-term investments	(598)	(125.5)	(100)
Proceeds from sale of marketable securities and short-term investments	351.4	109.8	73.6
Capital expenditures	(239.3)	(222.8)	(252.7)
Other, net	4.8	1.7	0.9
Net cash used in investing activities	(481.1)	(236.8)	(278.2)
CASH FLOWS FROM FINANCING ACTIVITIES:
(Repayment of) proceeds from credit facility borrowings, net	(67.8)	14.2	(11.3)
Proceeds from other credit facility borrowings	39.2	76.8	24.8
Repayment of other credit facility borrowings	(96.1)	(83.1)	(16)
Proceeds from issuance of long-term debt	0	98.1	0
Repayment of long-term debt	0	(97.1)	0
Repurchase of Common Stock	(99.2)	(183.6)	(220.4)
Proceeds from exercised stock options	54.6	15.3	2
Payments Related to Tax Withholding for Share-based Compensation	(8.7)	(2.9)	(1.6)
Cash dividends on Common Stock	(242.6)	(218.8)	(203.4)
Distribution to non-controlling interest	(0.5)	(3.8)	0
Financing fees	0	(1.5)	(0.2)
Net cash used in financing activities	(421.1)	(386.4)	(426.1)
Effect of exchange rate changes on cash and cash equivalents	12.7	1.9	0.5
Net increase in cash and cash equivalents	42.7	84.4	113.6
Cash and cash equivalents at beginning of year	928	843.6	730
Cash and cash equivalents at end of year	$ 970.7	$ 928	$ 843.6

Nature of Business (Notes)

Nature of Business (Notes)	12 Months Ended
Nature of Business (Notes)	Jan. 31, 2018
Disclosure Text Block [Abstract]
Nature of Business	NATURE OF BUSINESS Tiffany & Co. (the "Registrant") is a holding company that operates through Tiffany and Company ("Tiffany") and the Registrant's other subsidiary companies (collectively, the "Company"). The Registrant, through its subsidiaries, designs and manufactures products and operates TIFFANY & CO. retail stores worldwide, and also sells its products through Internet, catalog, business-to-business and wholesale distribution. The Company's principal merchandise offering is jewelry (representing 91% of worldwide net sales in 2017 ); it also sells timepieces, leather goods, sterling silver goods (other than jewelry), china, crystal, stationery, eyewear, fragrances and other accessories. The Company's reportable segments are as follows: • Americas includes sales in Company-operated TIFFANY & CO. stores in the United States, Canada and Latin America, as well as sales of TIFFANY & CO. products in certain markets through Internet, catalog, business-to-business and wholesale operations; • Asia-Pacific includes sales in Company-operated TIFFANY & CO. stores, as well as sales of TIFFANY & CO. products in certain markets through Internet and wholesale operations; • Japan includes sales in Company-operated TIFFANY & CO. stores, as well as sales of TIFFANY & CO. products through Internet, business-to-business and wholesale operations; • Europe includes sales in Company-operated TIFFANY & CO. stores, as well as sales of TIFFANY & CO. products in certain markets through Internet and wholesale operations; and • Other consists of all non-reportable segments. Other includes the Emerging Markets region, which includes sales in Company-operated TIFFANY & CO. stores and wholesale operations in the Middle East. In addition, Other includes wholesale sales of diamonds as well as earnings received from third-party licensing agreements.

Summary of Significant Accounti

Summary of Significant Accounting Policies (Notes)	12 Months Ended
Summary of Significant Accounting Policies (Notes)	Jan. 31, 2018
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Fiscal Year The Company's fiscal year ends on January 31 of the following calendar year. All references to years relate to fiscal years rather than calendar years. Basis of Reporting The accompanying consolidated financial statements include the accounts of Tiffany & Co. and its subsidiaries in which a controlling interest is maintained. Controlling interest is determined by majority ownership interest and the absence of substantive third-party participating rights or, in the case of variable interest entities (VIEs), if the Company has the power to significantly direct the activities of a VIE, as well as the obligation to absorb significant losses of or the right to receive significant benefits from the VIE. Intercompany accounts, transactions and profits have been eliminated in consolidation. The equity method of accounting is used for investments in which the Company has significant influence, but not a controlling interest. Certain prior year amounts have been reclassified to conform with the current year presentation. In connection with the adoption of ASU No. 2016-09 – Compensation - Stock Compensation: Improvements to Employee Share-Based Payment Accounting , certain items have been reclassified on the consolidated statement of cash flows for the years ended January 31, 2017 and 2016. See "Recently Adopted Accounting Standards" below for additional information. Use of Estimates These financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP"); these principles require management to make certain estimates and assumptions that affect amounts reported and disclosed in the consolidated financial statements and related notes to the consolidated financial statements. Actual results could differ from these estimates and the differences could be material. Periodically, the Company reviews all significant estimates and assumptions affecting the consolidated financial statements relative to current conditions and records the effect of any necessary adjustments. Cash and Cash Equivalents Cash and cash equivalents are stated at cost plus accrued interest, which approximates fair value. Cash equivalents include highly liquid investments with an original maturity of three months or less and consist of time deposits and/or money market fund investments with a number of U.S. and non-U.S. financial institutions with high credit ratings. The Company's policy restricts the amount invested with any one financial institution. Short-Term Investments Short-term investments are classified as available-for-sale and are carried at fair value. At January 31, 2018 and 2017 , the Company's short-term available-for-sale investments consisted entirely of time deposits. At the time of purchase, management determines the appropriate classification of these investments and reevaluates such designation as of each balance sheet date. Receivables and Financing Arrangements Receivables. The Company's accounts receivable, net primarily consists of amounts due from Credit Receivables (defined below), department store operators that host TIFFANY & CO. boutiques in their stores, third-party credit card issuers and wholesale customers. The Company maintains an allowance for doubtful accounts for estimated losses associated with outstanding accounts receivable. The allowance is determined based on a combination of factors including, but not limited to, the length of time that the receivables are past due, management's knowledge of the customer, economic and market conditions and historical write-off experiences. For the receivables associated with Tiffany & Co. credit cards ("Credit Card Receivables"), management uses various indicators to determine whether to extend credit to customers and the amount of credit. Such indicators include reviewing prior experience with the customer, including sales and collection history, and using applicants' credit reports and scores provided by credit rating agencies. Certain customers may be granted payment terms which permit purchases above a minimum amount to be paid for in equal monthly installments over a period not to exceed 12 months (together with Credit Card Receivables, "Credit Receivables"). Credit Receivables require minimum balance payments. An account is classified as overdue if a minimum balance payment has not been received within the allotted timeframe (generally 30 days), after which internal collection efforts commence. In order for the account to return to current status, full payment on all past due amounts must be received by the Company. For all Credit Receivables, once all internal collection efforts have been exhausted and management has reviewed the account, the account balance is written off and may be sent for external collection or legal action. At January 31, 2018 and 2017 , the carrying amount of the Credit Receivables (recorded in Accounts receivable, net) was $67.1 million and $ 71.9 million, of which 95% and 97% were considered current, respectively. The allowance for doubtful accounts for estimated losses associated with the Credit Receivables ( $1.3 million at January 31, 2018 and $1.1 million at January 31, 2017 ) was determined based on the factors discussed above. Finance charges earned on Credit Receivables accounts were not significant. Financing Arrangements. The Company provided financing to diamond mining and exploration companies in order to obtain rights to purchase the mine's output. Management evaluates these financing arrangements for potential impairment by reviewing the parties' financial statements along with projections and business, operational and other economic factors on a periodic basis. As of January 31, 2017 , the Company had a $43.8 million financing arrangement (the "Loan") with Koidu Limited (previously Koidu Holdings S.A.) ("Koidu"). However, the Company recorded impairment charges totaling $4.2 million and $37.9 million during the fiscal years ended January 31, 2017 and 2016, respectively, related to the Loan and ceased accruing interest income on the loan as of July 2015, resulting in a net carrying amount of $1.7 million as of January 31, 2017 . In 2017, the Company sold its interest in the Loan to Koidu's largest creditor for $1.7 million . Additionally, the Company and Koidu entered into an agreement to terminate the supply agreement between the parties, pursuant to which Laurelton Diamonds, Inc., a wholly owned subsidiary of the Company, had previously been required to purchase at fair market value certain diamonds recovered from the mine operated by Koidu that met Laurelton's quality standards. The Company also recorded an impairment charge of $8.4 million during the fiscal year ended January 31, 2017 related to a separate financing arrangement with another diamond mining and exploration company. At January 31, 2017, the current portion of the carrying amount of financing arrangements including accrued interest was $4.6 million and was recorded in Prepaid expenses and other current assets. At January 31, 2017, the non-current portion of the carrying amount of all such financing arrangements including accrued interest was $4.4 million and was included in Other assets, net. At January 31, 2018, the carrying amount of financing arrangements was not significant. Impairment charges recorded on such arrangements were not significant during 2017. Inventories Inventories are valued at the lower of cost or net realizable value using the average cost method except for certain diamond and gemstone jewelry which uses the specific identification method. Property, Plant and Equipment Property, plant and equipment are stated at cost less accumulated depreciation. Depreciation is calculated on a straight-line basis over the following estimated useful lives: Buildings 39 years Machinery and equipment 5-15 years Office equipment 3-8 years Software 5-10 years Furniture and fixtures 3-10 years Leasehold improvements and building improvements are amortized over the shorter of their estimated useful lives (ranging from 8-10 years) or the related lease terms or building life, respectively. Maintenance and repair costs are charged to earnings while expenditures for major renewals and improvements are capitalized. Upon the disposition of property, plant and equipment, the accumulated depreciation is deducted from the original cost and any gain or loss is reflected in current earnings. The Company capitalizes interest on borrowings during the active construction period of major capital projects. Capitalized interest is added to the cost of the underlying assets and is amortized over the useful lives of the assets. The Company's capitalized interest costs were not significant in 2017 , 2016 or 2015 . Information Systems Development Costs Eligible costs incurred during the development stage of information systems projects are capitalized and amortized over the estimated useful life of the related project. Eligible costs include those related to the purchase, development, and installation of the related software. Costs incurred prior to the development stage, as well as costs for maintenance, data conversion, training, and other general and administrative costs, are expensed as incurred. Costs that are capitalized are included in Property, Plant and Equipment, in Construction-in-progress while in the development stage and in Software once placed into service. Capitalized software costs are subject to the Company’s accounting policy related to the review of long-lived assets for impairment. See "Impairment of Long-Lived Assets" below for further details. Intangible Assets and Key Money Intangible assets, consisting of product rights and trademarks, are recorded at cost and are amortized on a straight-line basis over their estimated useful lives, which range from 15 to 20 years. Intangible assets are reviewed for impairment in accordance with the Company's policy for impairment of long-lived assets (see "Impairment of Long-Lived Assets" below). Key money is the amount of funds paid to a landlord or tenant to acquire the rights of tenancy under a commercial property lease for a certain property. Key money represents the "right to lease" with an automatic right of renewal. This right can be subsequently sold by the Company or can be recovered should the landlord refuse to allow the automatic right of renewal to be exercised. Key money is amortized over the estimated useful life, 39 years. The following table summarizes intangible assets and key money, included in Other assets, net, as follows: January 31, 2018 January 31, 2017 (in millions) Gross Carrying Amount Accumulated Amortization Gross Carrying Amount Accumulated Amortization Product rights $ 48.9 $ (13.5 ) $ 48.9 $ (11.0 ) Key money 36.8 (5.5 ) 31.9 (4.1 ) Trademarks 2.5 (2.5 ) 2.5 (2.5 ) $ 88.2 $ (21.5 ) $ 83.3 $ (17.6 ) Amortization of intangible assets and key money for the years ended January 31, 2018 , 2017 and 2016 was $3.4 million, $3.4 million and $3.7 million, respectively. Amortization expense is estimated to be approximately $3.6 million in each of the next five years. Goodwill Goodwill represents the excess of cost over fair value of net assets acquired in a business combination. Goodwill is evaluated for impairment annually in the fourth quarter, or when events or changes in circumstances indicate that the value of goodwill may be impaired. A qualitative assessment is first performed for each reporting unit to determine whether it is more-likely-than-not that the fair value of a reporting unit is less than its carrying value. If it is concluded that this is the case, a quantitative evaluation, based on discounted cash flows, is performed and requires management to estimate future cash flows, growth rates and economic and market conditions. If the quantitative evaluation indicates that goodwill is not recoverable, an impairment loss is calculated and recognized during that period. At January 31, 2018 and 2017 , goodwill, included in Other assets, net, consisted of the following by reportable segment: (in millions) Americas Asia-Pacific Japan Europe Other Total January 31, 2016 $ 12.2 $ 0.3 $ 1.1 $ 1.0 $ 23.9 $ 38.5 Translation (0.1 ) — (0.1 ) 0.1 — (0.1 ) January 31, 2017 12.1 0.3 1.0 1.1 23.9 38.4 Translation 0.1 — — — 0.6 0.7 January 31, 2018 $ 12.2 $ 0.3 $ 1.0 $ 1.1 $ 24.5 $ 39.1 The Company recorded no impairment charges related to goodwill in 2017 , 2016 or 2015 . Impairment of Long-Lived Assets The Company reviews its long-lived assets (such as property, plant and equipment) other than goodwill for impairment when management determines that the carrying value of such assets may not be recoverable due to events or changes in circumstances. Recoverability of long-lived assets is evaluated by comparing the carrying value of the asset with its estimated future undiscounted cash flows. If the comparisons indicate that the asset is not recoverable, an impairment loss is calculated as the difference between the carrying value and the fair value of the asset and the loss is recognized during that period. In 2017 , the Company recorded aggregate impairment charges of $10.0 million related to property, plant and equipment. In 2016, the Company recorded an impairment charge of $25.4 million associated with the costs capitalized in connection with the development of a new finished goods inventory management and merchandising information system (see "Note E. Property, Plant and Equipment" for additional information). The Company recorded no significant impairment charges related to long-lived assets in 2015 . Hedging Instruments The Company uses derivative financial instruments to mitigate a portion of its foreign currency, precious metal price and interest rate exposures. Derivative instruments are recorded on the consolidated balance sheet at their fair values, as either assets or liabilities, with an offset to current or other comprehensive earnings, depending on whether a derivative is designated as part of an effective hedge transaction and, if it is, the type of hedge transaction. Marketable Securities The Company's marketable securities, recorded within Other assets, net, are classified as available-for-sale and are recorded at fair value with unrealized gains and losses reported as a separate component of stockholders' equity. Realized gains and losses are recorded in Other (income) expense, net. The marketable securities are held for an indefinite period of time, but may be sold in the future as changes in market conditions or economic factors occur. The fair value of the marketable securities is determined based on prevailing market prices. Gross unrealized gains and gross unrealized losses recorded within Accumulated other comprehensive loss, net of tax as of January 31, 2018 and 2017 were not significant. Realized gains or losses reclassified from other comprehensive earnings are determined on the basis of specific identification. The Company's marketable securities primarily consist of investments in mutual funds. When evaluating marketable securities for other-than-temporary impairment, the Company reviews factors such as the length of time and the extent to which fair value has been below cost basis, the financial condition of the issuer, and the Company's ability and intent to hold the investments for a period of time which may be sufficient for anticipated recovery in market value. Based on the Company's evaluations, it determined that any unrealized losses on its outstanding mutual funds were temporary in nature and, therefore, did not record any impairment charges during 2017 , 2016 or 2015 . Merchandise Credits and Deferred Revenue Merchandise credits and deferred revenue primarily represent outstanding gift cards sold to customers and outstanding credits issued to customers for returned merchandise. All such outstanding items may be tendered for future merchandise purchases. A gift card liability is established when the gift card is sold. A merchandise credit liability is established when a merchandise credit is issued to a customer for a returned item and the original sale is reversed. The liabilities are relieved and revenue is recognized when merchandise is purchased and delivered to the customer and the merchandise credit or gift card is used as a form of payment. If merchandise credits or gift cards are not redeemed over an extended period of time (for example, approximately three to five years in the U.S.), the value of the merchandise credits or gift cards is generally remitted to the applicable jurisdiction in accordance with unclaimed property laws. Revenue Recognition Sales are recognized at the "point of sale," which occurs when merchandise is taken in an "over-the-counter" transaction or upon receipt by a customer in a shipped transaction, such as through the Internet and catalog channels. Revenue associated with gift cards and merchandise credits is recognized upon redemption. Sales are reported net of returns, sales tax and other similar taxes. Shipping and handling fees billed to customers are included in net sales. The Company maintains a reserve for potential product returns and it records, as a reduction to sales and cost of sales, its provision for estimated product returns, which is determined based on historical experience. Additionally, outside of the U.S., the Company operates certain TIFFANY & CO. stores within various department stores. Sales transacted at these store locations are recognized at the "point of sale." The Company and these department store operators have distinct responsibilities and risks in the operation of such TIFFANY & CO. stores. The Company (i) owns and manages the merchandise; (ii) establishes retail prices; (iii) has merchandising, marketing and display responsibilities; and (iv) in almost all locations provides retail staff and bears the risk of inventory loss. The department store operators (i) provide and maintain store facilities; (ii) in almost all locations assume retail credit and certain other risks; and (iii) act for the Company in the sale of merchandise. In return for their services and use of their facilities, the department store operators retain a portion of net retail sales made in TIFFANY & CO. stores which is recorded as commission expense within Selling, general and administrative expenses. Cost of Sales Cost of sales includes costs to internally manufacture merchandise (primarily metal, gemstones, labor and overhead), costs related to the purchase of merchandise from third-parties, inbound freight, purchasing and receiving, inspection, warehousing, internal transfers and other costs associated with distribution and merchandising. Cost of sales also includes royalty fees paid to outside designers and customer shipping and handling charges. Selling, General and Administrative ("SG&A") Expenses SG&A expenses include costs associated with the selling and marketing of products as well as administrative expenses. The types of expenses associated with these functions are store operating expenses (such as labor, rent and utilities), advertising and other corporate level administrative expenses. Advertising, Marketing, Public and Media Relations Costs Advertising, marketing, public and media relations costs include media, production, catalogs, Internet, marketing events, visual merchandising costs (in-store and window displays) and other related costs. In 2017 , 2016 and 2015 , these costs totaled $314.9 million, $299.0 million and $302.0 million, respectively, representing 7.6% , 7.5% and 7.4% of worldwide net sales, respectively. Media and production costs for print and digital advertising are expensed as incurred, while catalog costs are expensed upon first distribution. Pre-Opening Costs Costs associated with the opening of new retail stores are expensed in the period incurred. Stock-Based Compensation New, modified and unvested share-based payment transactions with employees, such as stock options and restricted stock units, are measured at fair value and recognized as compensation expense over the requisite service period. Compensation expense recognized reflects an estimate of the number of awards expected to vest and incorporates an estimate of award forfeitures based on actual experience. Compensation expense is recognized on a straight-line basis over the requisite service period, which is generally the vesting period required to obtain full vesting. Merchandise Design Activities Merchandise design activities consist of conceptual formulation and design of possible products and creation of pre-production prototypes and molds. Costs associated with these activities are expensed as incurred. Foreign Currency The functional currency of most of the Company's foreign subsidiaries and branches is the applicable local currency. Assets and liabilities are translated into U.S. dollars using the current exchange rates in effect at the balance sheet date, while revenues and expenses are translated at the average exchange rates during the period. The resulting translation adjustments are recorded as a component of Accumulated other comprehensive loss, net of tax within stockholders' equity. The Company also recognizes gains and losses associated with transactions that are denominated in foreign currencies. The Company recorded net losses resulting from foreign currency transactions of $5.3 million, $4.8 million and $9.8 million within Other (income) expense, net in 2017 , 2016 and 2015 , respectively. Income Taxes The Company accounts for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements. Under this method, deferred tax assets and liabilities are recognized by applying statutory tax rates in effect in the years in which the differences between the financial reporting and tax filing bases of existing assets and liabilities are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date. The Company records net deferred tax assets to the extent management believes these assets will more likely than not be realized. In making such determination, the Company considers all available evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax planning strategies and recent financial results. In the event management were to determine that the Company would be able to realize its deferred income tax assets in the future in excess of their net recorded amounts, the Company would make an adjustment to the valuation allowance, which would reduce the provision for income taxes. In evaluating the exposures associated with the Company's various tax filing positions, management records reserves using a more-likely-than-not recognition threshold for income tax positions taken or expected to be taken. The Registrant, its U.S. subsidiaries and the foreign branches of its U.S. subsidiaries file a consolidated Federal income tax return. The Company accounts for the impact of changes in tax legislation in the period in which the legislation is enacted. The 2017 U.S. Tax Cuts and Jobs Act (the "2017 Tax Act") was enacted on December 22, 2017 in the U.S. On that date, the Securities and Exchange Commission ("SEC") issued Staff Accounting Bulletin No. 118 ("SAB 118"), which addresses the application of U.S. GAAP in situations in which a registrant does not have necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the 2017 Tax Act. The Company has accounted for the 2017 Tax Act in accordance with the provisions of SAB 118. See "Note O. Income Taxes" for additional information on the provisions and impacts of the 2017 Tax Act and SAB 118. Earnings Per Share ("EPS") Basic EPS is computed as net earnings divided by the weighted-average number of common shares outstanding for the period. Diluted EPS includes the dilutive effect of the assumed exercise of stock options and unvested restricted stock units. The following table summarizes the reconciliation of the numerators and denominators for the basic and diluted EPS computations: Years Ended January 31, (in millions) 2018 2017 2016 Net earnings for basic and diluted EPS $ 370.1 $ 446.1 $ 463.9 Weighted-average shares for basic EPS 124.5 125.1 128.6 Incremental shares based upon the assumed exercise of stock options and unvested restricted stock units 0.6 0.4 0.5 Weighted-average shares for diluted EPS 125.1 125.5 129.1 For the years ended January 31, 2018 , 2017 and 2016 , there were 0.6 million, 1.3 million and 0.8 million stock options and restricted stock units excluded from the computations of earnings per diluted share due to their antidilutive effect, respectively. New Accounting Standards In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09 – Revenue From Contracts with Customers , to clarify the principles of recognizing revenue and create common revenue recognition guidance between U.S. GAAP and International Financial Reporting Standards. The core principle of the guidance is that a company should recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. In doing so, companies will need to use more judgment and make more estimates than under ASC 605 – Revenue Recognition . These may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. In August 2015, the FASB issued ASU 2015-14 – Revenue from Contracts with Customers: Deferral of the Effective Date , deferring the effective date of ASU 2014-09 for one year to interim and annual reporting periods beginning after December 15, 2017. Early adoption was also permitted as of the original effective date (interim and annual periods beginning after December 15, 2016) and full or modified retrospective application is permitted. Subsequently, the FASB has issued a number of ASU's amending ASU 2014-09 and providing further guidance related to revenue recognition, which management continues to evaluate. The effective date and transition requirements for these amendments are the same as ASU 2014-09, as amended by ASU 2015-14. Management expects the impact of the adoption of ASU 2014-09 on the Company's consolidated financial statements will be as follows: • The Company's revenue is primarily generated from the sale of finished products to customers (primarily through the retail, e-commerce or wholesale channels). The Company's performance obligations underlying such sales, and the timing of revenue recognition related thereto, will remain substantially unchanged following the adoption of this ASU. • The Company will now recognize gift card breakage income based on the historical pattern of gift card redemptions. • The adoption of this ASU will result in a reclassification within the consolidated balance sheet of the portion of the Company's sales return reserve attributable to cost of sales from Accounts receivable, net to Other current assets beginning with the quarter ending April 30, 2018. • Management will adopt the guidance in this ASU beginning on February 1, 2018 using the modified retrospective transition approach, with the related adjustment to retained earnings reflecting the cumulative impact of applying this guidance as of the adoption date. Under this modified retrospective approach, the prior period financial statements presented are not restated. Management does not believe the adoption of this ASU will have a significant impact to the consolidated financial statements and related disclosures. In February 2016, the FASB issued ASU No. 2016-02 – Leases , which requires an entity that leases assets to recognize on the balance sheet the assets and liabilities for the rights and obligations created by those leases. Leases will be classified as either financing or operating, similar to current accounting requirements, with the applicable classification determining the pattern of expense recognition in the statement of earnings. This ASU is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018 and currently must be adopted using a modified retrospective approach. Management continues to evaluate the impact of this ASU on the consolidated financial statements, but expects that adoption will result in a significant increase in the Company's assets and liabilities. The Company's implementation project team has completed the assessment phase of the project, during which the project team compiled information to evaluate the Company's real estate, personal property and other arrangements that may meet the definition of a lease under this ASU and identified areas that may require the development of additional processes and policies. The Company's implementation project team is in the solution development phase of the project, which includes the development and implementation of any such additional processes and policies, collection of key data for each leased asset to be utilized throughout this phase of the project and selection of the practical expedients permitted under the ASU. In June 2016, the FASB issued ASU 2016-13 – Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments . ASU 2016-13 amends the impairment model to utilize an expected loss methodology in place of the currently used incurred loss methodology, which will result in more timely recognition of losses. The new standard applies to financial assets measured at amortized cost basis, including receivables that result from revenue transactions and held-to-maturity debt securities. The ASU is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019, and early adoption is permitted for fiscal years beginning after December 15, 2018. Management continues to evaluate the impact of this ASU on the consolidated financial statements. In August 2016, the FASB issued ASU 2016-15 – Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments , which provides guidance on eight specific cash flow issues in an effort to reduce diversity in practice in how certain transactions are classified within the statement of cash flows. This ASU is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. Early adoption was permitted and the amendments should be applied using a retrospective method. Management will adopt this ASU beginning on February 1, 2018 using the retrospective method. Management does not believe the adoption of this ASU will have a significant impact to the consolidated statements of cash flows and related disclosures. In October 2016, the FASB issued ASU 2016-16 – Income Taxes: Intra-Entity Transfers of Assets Other Than Inventory . This ASU eliminates the requirement to defer the recognition of current and deferred income taxes for an intra-entity asset transfer until the asset has been sold to an outside party. Therefore, under the new guidance, an entity should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. This ASU is effective for interim and annual reporting periods beginning after December 15, 2017. Early adoption was permitted as of the first interim period of 2017 and the amendments should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. Management will adopt this ASU beginning on February 1, 2018 using the modified retrospective method. Management does not believe the adoption of this ASU will have a significant impact on the consolidated financial statements. In March 2017, the FASB issued ASU 2017-07 - Compensation - Retirement Benefits: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost . Under this ASU, only the service cost component of the net periodic benefit cost will be presented in the same income statement lin

Supplemental Cash Flow Informat

Supplemental Cash Flow Information (Notes)	12 Months Ended
Supplemental Cash Flow Information (Notes)	Jan. 31, 2018
Supplemental Cash Flow Information [Abstract]
Cash Flow, Supplemental Disclosures [Text Block]	SUPPLEMENTAL CASH FLOW INFORMATION Cash paid during the year for: Years Ended January 31, (in millions) 2018 2017 2016 Interest, net of interest capitalization $ 41.5 $ 40.6 $ 42.5 Income taxes $ 156.2 $ 213.9 $ 237.5 Supplemental noncash investing and financing activities: January 31, (in millions) 2018 2017 2016 Accrued capital expenditures $ 20.1 $ 10.7 $ 8.2

Inventories (Notes)

Inventories (Notes)	12 Months Ended
Inventories (Notes)	Jan. 31, 2018
Inventory Disclosure [Abstract]
Inventories	INVENTORIES January 31, (in millions) 2018 2017 Finished goods $ 1,314.6 $ 1,249.4 Raw materials 821.4 806.3 Work-in-process 117.5 101.9 Inventories, net $ 2,253.5 $ 2,157.6

Property, Plant and Equipment (

Property, Plant and Equipment (Notes)	12 Months Ended
Property, Plant and Equipment (Notes)	Jan. 31, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment Disclosure [Text Block]	PROPERTY, PLANT AND EQUIPMENT January 31, (in millions) 2018 2017 Land $ 41.8 $ 41.8 Buildings 123.0 122.5 Leasehold and building improvements 1,328.6 1,195.8 Office equipment 267.4 245.7 Software 353.2 312.4 Furniture and fixtures 311.6 281.2 Machinery and equipment 187.4 177.7 Construction-in-progress 105.1 78.6 2,718.1 2,455.7 Accumulated depreciation and amortization (1,727.6 ) (1,523.9 ) $ 990.5 $ 931.8 Depreciation and amortization expense for the years ended January 31, 2018 , 2017 and 2016 was $200.8 million, $202.5 million and $196.3 million, respectively. Information Systems Assessment. The Company is engaged in a multi-year program to evaluate and, where appropriate, upgrade and/or replace certain of its information systems. As part of this program, the Company identified opportunities to enhance its finished goods inventory management and merchandising capabilities, and began development efforts to replace certain of its existing systems and provide these enhanced capabilities. In 2016, the Company completed an assessment of the replacement system that was under development to evaluate whether the continued development of this system would deliver sufficiently improved operating capabilities. Following the completion of this assessment, in the three months ended January 31, 2017, the Company concluded that the development of this system should be modified such that the finished goods inventory management and merchandising capabilities that were intended to be delivered utilizing this new system will instead be delivered through further development of the Company’s current Enterprise Resource Planning system and continued implementation of a new order management system. Accordingly, the Company evaluated the costs capitalized for the development of the replacement system for impairment in accordance with its policy on the review of long-lived assets (see "Note B. Summary of Significant Accounting Policies"), and determined, based on specific identification of costs capitalized pertaining to the development of specific capabilities in the new system, that $25.4 million of such capitalized costs related to software functionality which will not be utilized, and therefore will not have future benefit to the Company. As such, the Company recorded a pre-tax impairment charge of $25.4 million as a component of SG&A expenses in the three months ended January 31, 2017.

Accounts Payable and Accrued Li

Accounts Payable and Accrued Liabilities (Notes)	12 Months Ended
Accounts Payable and Accrued Liabilities (Notes)	Jan. 31, 2018
Payables and Accruals [Abstract]
Accounts Payable and Accrued Liabilities Disclosure [Text Block]	ACCOUNTS PAYABLE AND ACCRUED LIABILTIES January 31, (in millions) 2018 2017 Accounts payable - trade $ 201.5 $ 108.6 Accrued compensation and commissions 110.0 96.3 Accrued sales, withholding and other taxes 24.6 26.7 Other 101.3 81.2 $ 437.4 $ 312.8

Debt (Notes)

Debt (Notes)	12 Months Ended
Debt (Notes)	Jan. 31, 2018
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]	DEBT January 31, (in millions) 2018 2017 Short-term borrowings: Credit Facilities $ 33.5 $ 93.0 Other credit facilities 87.1 135.7 $ 120.6 $ 228.7 Long-term debt: Unsecured Senior Notes: 2012 4.40% Series B Notes, due July 2042 a $ 250.0 $ 250.0 2014 3.80% Senior Notes, due October 2024 b, c 250.0 250.0 2014 4.90% Senior Notes, due October 2044 b, c 300.0 300.0 2016 0.78% Senior Notes, due August 2026 b, d 91.9 88.0 891.9 888.0 Less unamortized discounts and debt issuance costs 9.0 9.6 $ 882.9 $ 878.4 a The agreements governing these Senior Notes require repayments of $ 50.0 million in aggregate every five years beginning in July 2022. b These agreements require lump sum repayments upon maturity. c These Senior Notes were issued at a discount, which will be amortized until the debt maturity. d These Senior Notes were issued at par, ¥ 10.0 billion. Credit Facilities In 2014, the Registrant entered into a four-year $375.0 million and a five-year $375.0 million multi-bank, multi-currency, committed unsecured revolving credit facility, including letter of credit subfacilities, (collectively, the "Credit Facilities") resulting in a total borrowing capacity of $750.0 million. The Credit Facilities are available for working capital and other corporate purposes. Borrowings under the Credit Facilities will bear interest at a rate per annum equal to, at the option of the Company, (1) LIBOR (or other applicable reference rate) for the relevant currency plus an applicable margin based upon the Company's leverage ratio as defined under the Credit Facilities, or (2) an alternate base rate equal to the highest of (i) the Federal Funds Rate plus 0.50% , (ii) Bank of America, N.A.’s prime rate and (iii) one-month LIBOR plus 1% , plus an applicable margin based upon the Company's leverage ratio as defined under the Credit Facilities. The Credit Facilities also require payment to the lenders of a facility fee on the amount of the lenders’ commitments under the credit facilities from time to time at rates based upon the Company's leverage ratio as defined under the Credit Facilities. Voluntary prepayments of the loans and voluntary reductions of the unutilized portion of the commitments under the Credit Facilities are permissible without penalty, subject to certain conditions pertaining to minimum notice and minimum reduction amounts. In October 2016, the maturity for each of the Credit Facilities was extended for one additional year pursuant to the terms set forth in the respective agreements governing the Credit Facilities. Therefore, the four-year and five-year Credit Facilities will mature in October of 2019 and 2020, respectively. At January 31, 2018 , there were $33.5 million of borrowings outstanding, $6.8 million of letters of credit issued but not outstanding and $709.7 million available for borrowing under the Credit Facilities. At January 31, 2017 , there were $93.0 million of borrowings outstanding, $4.0 million of letters of credit issued but not outstanding and $653.0 million available for borrowings. The weighted-average interest rate for borrowings outstanding was 1.10% at January 31, 2018 and 1.72% at January 31, 2017 . Commercial Paper In August 2017, the Registrant and one of its wholly owned subsidiaries established a commercial paper program (the "Commercial Paper Program") for the issuance of commercial paper in the form of short-term promissory notes in an aggregate principal amount not to exceed $750.0 million . Borrowings under the Commercial Paper Program are used for general corporate purposes. The aggregate amount of borrowings that the Company is currently authorized to have outstanding under the Commercial Paper Program and the Credit Facilities is $750.0 million . The Registrant guarantees the obligations of its wholly owned subsidiary under the Commercial Paper Program. Maturities of commercial paper notes may vary, but cannot exceed 397 days from the date of issuance. Notes issued under the Commercial Paper Program rank equally with the Registrant's present and future unsecured and unsubordinated indebtedness. At January 31, 2018 , there were no borrowings outstanding under the Commercial Paper Program. Other Credit Facilities Tiffany-Shanghai Credit Agreement. In July 2016, the Registrant's wholly owned subsidiary, Tiffany & Co. (Shanghai) Commercial Company Limited ("Tiffany-Shanghai"), entered into a three-year multi-bank revolving credit agreement (the "Tiffany-Shanghai Credit Agreement"). The Tiffany-Shanghai Credit Agreement has an aggregate borrowing limit of RMB 990.0 million ( $156.5 million at January 31, 2018 ). The Tiffany-Shanghai Credit Agreement, which matures in July 2019, was made available to refinance amounts outstanding under Tiffany-Shanghai’s previously existing RMB 930.0 million three-year multi-bank revolving credit agreement (the "2013 Agreement"), which expired pursuant to its terms in July 2016, as well as for Tiffany-Shanghai's ongoing general working capital requirements. The six lenders party to the Tiffany-Shanghai Credit Agreement will make loans, upon Tiffany-Shanghai's request, for periods of up to 12 months at the applicable interest rates as announced by the People's Bank of China (provided, that if such announced rate is below zero, the applicable interest rate shall be deemed to be zero). In connection with the Tiffany-Shanghai Credit Agreement, in July 2016, the Registrant entered into a Guaranty Agreement by and between the Registrant and the facility agent under the Tiffany-Shanghai Credit Agreement (the "Guaranty"). At January 31, 2018 , there was $112.7 million available to be borrowed under the Tiffany-Shanghai Credit Agreement and $43.8 million was outstanding at a weighted-average interest rate of 4.35% . At January 31, 2017 , there was $103.6 million available to be borrowed under the Tiffany-Shanghai Credit Agreement and $40.2 million was outstanding at a weighted-average interest rate of 4.35% . Other. The Company has various other revolving credit facilities, primarily in Japan and China. At January 31, 2018 , the facilities totaled $139.0 million and $43.3 million was outstanding at a weighted-average interest rate of 6.87% . At January 31, 2017 , the facilities totaled $137.3 million and $95.5 million was outstanding at a weighted-average interest rate of 2.99% . Senior Notes 2016 Senior Notes. In August 2016, the Registrant issued ¥ 10.0 billion ( $91.9 million at January 31, 2018 ) of 0.78% Senior Notes due August 2026 (the "Yen Notes") in a private transaction. The proceeds from the issuance of the Yen Notes were used to repay the Registrant's ¥ 10.0 billion 1.72% Senior Notes due September 2016 upon the maturity thereof. The Yen Notes bear interest at a rate of 0.78% per annum, payable semi-annually on February 26 and August 26 of each year, commencing February 26, 2017. the Registrant may redeem all or part of the Yen Notes upon not less than 30 nor more than 60 days' prior notice at a redemption price equal to the sum of (i) 100% of the principal amount of the Yen Notes to be redeemed, plus (ii) accrued and unpaid interest, if any, on those Yen Notes to the redemption date, plus (iii) a make-whole premium as of the redemption date. Debt Covenants The agreements governing the Credit Facilities include specific financial covenants, as well as other covenants that limit the ability of the Registrant to incur certain subsidiary indebtedness, incur liens, impose restrictions on subsidiary distributions and engage in mergers, consolidations and sales of all or substantially all of Registrant and its subsidiaries' assets, in addition to other requirements and "Events of Default" (as defined in the agreements governing the Credit Facilities) customary to such borrowings. The Tiffany-Shanghai Credit Agreement includes certain covenants that limit Tiffany-Shanghai's ability to pay certain dividends, make certain investments and incur certain indebtedness, and the Guaranty requires maintenance by the Registrant of specific financial covenants and ratios, in addition to other requirements and limitations customary to such borrowings. The indenture governing the 2014 3.80% Senior Notes and 2014 4.90% Senior Notes, as amended and supplemented in respect of each such series of Notes (the "Indenture"), contains covenants that, among other things, limit the ability of the Registrant and its subsidiaries under certain circumstances to create liens and impose conditions on the Registrant’s ability to engage in mergers, consolidations and sales of all or substantially all of its or its subsidiaries’ assets. The Indenture also contains certain "Events of Default" (as defined in the Indenture) customary for indentures of this type. The Indenture does not contain any specific financial covenants. The agreements governing the 2012 4.40% Series B Senior Notes and the Yen Notes require maintenance of specific financial covenants and ratios and limit certain changes to indebtedness of the Registrant and its subsidiaries and the general nature of the business, in addition to other requirements customary to such borrowings. At January 31, 2018, the Company was in compliance with all debt covenants. In the event of any default of payment or performance obligations extending beyond applicable cure periods as set forth in the agreements governing the Company's applicable debt instruments, such agreements may be terminated or payment of the applicable debt may be accelerated. Further, each of the Credit Facilities, the Tiffany-Shanghai Credit Agreement, the agreements governing the 2012 4.40% Series B Senior Notes and the Yen Notes, and certain other loan agreements contain cross default provisions permitting the termination and acceleration of the loans, or acceleration of the notes, as the case may be, in the event that certain of the Company's other debt obligations are terminated or accelerated prior to their maturity. Long-Term Debt Maturities Aggregate maturities of long-term debt as of January 31, 2018 are as follows: Years Ending January 31, Amount a (in millions) 2019 $ 2020 — 2021 — 2022 — 2023 50.0 Thereafter 841.9 $ 891.9 a Amounts exclude any unamortized discount or premium. Letters of Credit The Company has available letters of credit and financial guarantees of $81.2 million, of which $22.6 million was outstanding at January 31, 2018 . Of those available letters of credit and financial guarantees, $60.1 million expires within one year. These amounts do not include letters of credit issued under the Credit Facilities.

Hedging Instruments (Notes)

Hedging Instruments (Notes)	12 Months Ended
Hedging Instruments (Notes)	Jan. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Hedging Instruments	HEDGING INSTRUMENTS Background Information The Company uses derivative financial instruments, including interest rate swaps, cross-currency swaps, forward contracts and net-zero-cost collar arrangements (combination of call and put option contracts) to mitigate a portion of its exposures to changes in interest rates, foreign currency exchange rates and precious metal prices. Derivative Instruments Designated as Hedging Instruments. If a derivative instrument meets certain hedge accounting criteria, it is recorded on the consolidated balance sheet at its fair value, as either an asset or a liability, with an offset to current or other comprehensive earnings, depending on whether the hedge is designated as one of the following on the date it is entered into: • Fair Value Hedge – A hedge of the exposure to changes in the fair value of a recognized asset or liability or an unrecognized firm commitment. For fair value hedge transactions, both the effective and ineffective portions of the changes in the fair value of the derivative and changes in the fair value of the item being hedged are recorded in current earnings. • Cash Flow Hedge – A hedge of the exposure to variability in the cash flows of a recognized asset, liability or a forecasted transaction. For cash flow hedge transactions, the effective portion of the changes in fair value of derivatives is reported as other comprehensive income ("OCI") and is recognized in current earnings in the period or periods during which the hedged transaction affects current earnings. Amounts excluded from the effectiveness calculation and any ineffective portions of the change in fair value of the derivative are recognized in current earnings. The Company formally documents the nature of and relationships between the hedging instruments and hedged items for a derivative to qualify as a hedge at inception and throughout the hedged period. The Company also documents its risk management objectives, strategies for undertaking the various hedge transactions and method of assessing hedge effectiveness. Additionally, for hedges of forecasted transactions, the significant characteristics and expected terms of a forecasted transaction must be identified, and it must be probable that each forecasted transaction will occur. If it were deemed probable that the forecasted transaction would not occur, the gain or loss on the derivative financial instrument would be recognized in current earnings. Derivative financial instruments qualifying for hedge accounting must maintain a specified level of effectiveness between the hedge instrument and the item being hedged, both at inception and throughout the hedged period. Derivative Instruments Not Designated as Hedging Instruments. Derivative instruments which do not meet the criteria to be designated as a hedge are recorded on the consolidated balance sheet at their fair values, as either assets or liabilities, with an offset to current earnings. The gains or losses on undesignated foreign exchange forward contracts substantially offset foreign exchange losses or gains on the underlying liabilities or transactions being hedged. The Company does not use derivative financial instruments for trading or speculative purposes. Types of Derivative Instruments Interest Rate Swaps – In 2012, the Company entered into forward-starting interest rate swaps to hedge the impact of interest rate volatility on future interest payments associated with the anticipated incurrence of $250.0 million of additional debt which was incurred in July 2012. The Company accounted for the forward-starting interest rate swaps as cash flow hedges. The Company settled the interest rate swap in 2012 and recorded an unrealized loss within accumulated other comprehensive loss. As of January 31, 2018 , $18.5 million remains recorded as an unrealized loss in accumulated other comprehensive loss, which is being amortized over the term of the 2042 Notes to which the interest rate swaps related. In 2014, the Company entered into forward-starting interest rate swaps to hedge the impact of interest rate volatility on future interest payments associated with the anticipated incurrence of long-term debt which was incurred in September 2014. The Company accounted for the forward-starting interest rate swaps as cash flow hedges. The Company settled the interest rate swap in 2014 and recorded an unrealized loss within accumulated other comprehensive loss. As of January 31, 2018 , $3.7 million remains recorded as an unrealized loss and is being amortized over the terms of the respective 2024 Notes or 2044 Notes to which the interest rate swaps related. Cross-currency Swaps – In 2016 and 2017, the Company entered into cross-currency swaps to hedge the foreign currency exchange risk associated with Japanese yen-denominated intercompany loans. These cross-currency swaps are designated and accounted for as cash flow hedges. As of January 31, 2018 , the notional amounts of cross-currency swaps accounted for as cash flow hedges and the respective maturity dates were as follows: Cross-Currency Swap Notional Amount Effective Date Maturity Date (in billions) (in millions) July 2016 October 1, 2024 ¥ 10.6 $ 100.0 March 2017 April 1, 2027 11.0 96.1 May 2017 April 1, 2027 5.6 50.0 Foreign Exchange Forward Contracts – The Company uses foreign exchange forward contracts to offset a portion of the foreign currency exchange risks associated with foreign currency-denominated liabilities, intercompany transactions and forecasted purchases of merchandise between entities with differing functional currencies. The Company assesses hedge effectiveness based on the total changes in the foreign exchange forward contracts' cash flows. These foreign exchange forward contracts are designated and accounted for as either cash flow hedges or economic hedges that are not designated as hedging instruments. As of January 31, 2018 , the notional amounts of foreign exchange forward contracts were as follows: (in millions) Notional Amount USD Equivalent Derivatives designated as hedging instruments: Japanese yen ¥ 16,996.8 $ 154.9 British pound £ 14.4 19.3 Derivatives not designated as hedging instruments: U.S. dollar $ 39.8 $ 39.8 Euro € 13.3 15.9 Australian Dollar AU$ 16.8 13.3 British pound £ 5.2 7.0 Czech koruna CZK 123.7 5.8 Japanese yen ¥ 876.0 8.0 Mexican peso ₱ 100.4 5.2 New Zealand dollar NZ$ 11.3 8.2 Singapore dollar S$ 29.2 21.9 Swiss franc Fr. 6.2 6.4 The maximum term of the Company's outstanding foreign exchange forward contracts as of January 31, 2018 is 12 months. Precious Metal Collars and Forward Contracts – The Company periodically hedges a portion of its forecasted purchases of precious metals for use in its internal manufacturing operations in order to manage the effect of volatility in precious metal prices. The Company may use either a combination of call and put option contracts in net-zero-cost collar arrangements ("precious metal collars") or forward contracts. For precious metal collars, if the price of the precious metal at the time of the expiration of the precious metal collar is within the call and put price, the precious metal collar expires at no cost to the Company. The Company accounts for its precious metal collars and forward contracts as cash flow hedges. The Company assesses hedge effectiveness based on the total changes in the precious metal collars and forward contracts' cash flows. As of January 31, 2018 , the maximum term over which the Company is hedging its exposure to the variability of future cash flows for all forecasted precious metals transactions is 17 months. As of January 31, 2018 , there were precious metal derivative instruments outstanding for approximately 45,000 ounces of platinum, 900,000 ounces of silver and 37,200 ounces of gold. Information on the location and amounts of derivative gains and losses in the consolidated financial statements is as follows: Years Ended January 31, 2018 2017 (in millions) Pre-Tax Gain (Loss) Recognized in OCI (Effective Portion) Pre-Tax Gain (Loss) Reclassified from Accumulated OCI into Earnings (Effective Portion) Pre-Tax Gain (Loss) Recognized in OCI (Effective Portion) Pre-Tax Gain (Loss) Reclassified from Accumulated OCI into Earnings (Effective Portion) Derivatives in Cash Flow Hedging Relationships: Foreign exchange forward contracts a $ (6.3 ) $ 0.1 $ (1.5 ) $ (1.5 ) Precious metal collars a 1.0 0.3 — — Precious metal forward contracts a 4.2 (0.9 ) 14.0 (8.5 ) Cross-currency swaps b (19.9 ) (11.1 ) (0.4 ) 6.6 Forward-starting interest rate swaps c — (1.4 ) — (1.5 ) $ (21.0 ) $ (13.0 ) $ 12.1 $ (4.9 ) a The gain or loss recognized in earnings is included within Cost of sales. b The gain or loss recognized in earnings is included within Other (income) expenses, net. c The gain or loss recognized in earnings is included within Interest expense and financing costs. The pre-tax gains (losses) on derivatives not designated as hedging instruments were not significant in the year ended January 31, 2018 . The Company had pre-tax losses of $9.2 million on such instruments in the year ended January 31, 2017 and were included in Other (income) expense, net. There was no material ineffectiveness related to the Company's hedging instruments for the periods ended January 31, 2018 and 2017 . The Company expects approximately $0.5 million of net pre-tax derivative gains included in accumulated other comprehensive loss at January 31, 2018 will be reclassified into earnings within the next 12 months. The actual amount reclassified will vary due to fluctuations in foreign currency exchange rates and precious metal prices. For information regarding the location and amount of the derivative instruments in the Consolidated Balance Sheet, see "Note I. Fair Value of Financial Instruments." Concentration of Credit Risk A number of major international financial institutions are counterparties to the Company's derivative financial instruments. The Company enters into derivative financial instrument agreements only with counterparties meeting certain credit standards (an investment grade credit rating at the time of the agreement) and limits the amount of agreements or contracts it enters into with any one party. The Company may be exposed to credit losses in the event of nonperformance by individual counterparties or the entire group of counterparties.

Fair Value of Financial Instrum

Fair Value of Financial Instruments (Notes)	12 Months Ended
Fair Value of Financial Instruments (Notes)	Jan. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	FAIR VALUE OF FINANCIAL INSTRUMENTS Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal market for the asset or liability in an orderly transaction between market participants on the measurement date. U.S. GAAP establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. U.S. GAAP prescribes three levels of inputs that may be used to measure fair value: Level 1 – Quoted prices in active markets for identical assets or liabilities, which are considered to be most reliable. Level 2 – Observable market-based inputs or unobservable inputs that are corroborated by market data. Level 3 – Unobservable inputs reflecting the reporting entity's own assumptions, which require the most judgment. The Company's derivative instruments are considered Level 2 instruments for the purposes of determining fair value. The Company's foreign exchange forward contracts, as well as its put option contracts and cross-currency swaps, are primarily valued using the appropriate foreign exchange spot rates. The Company's precious metal forward contracts and collars are primarily valued using the relevant precious metal spot rate. For further information on the Company's hedging instruments and program, see "Note H. Hedging Instruments." Financial assets and liabilities carried at fair value at January 31, 2018 are classified in the table below in one of the three categories described above: Estimated Fair Value Total Fair Value (in millions) Level 1 Level 2 Level 3 Financial assets Marketable securities a $ 22.5 $ — $ — $ 22.5 Time deposits b 320.5 — — 320.5 Derivatives designated as hedging instruments: Precious metal forward contracts c — 3.6 — 3.6 Foreign exchange forward contracts c — 0.1 — 0.1 Derivatives not designated as hedging instruments: Foreign exchange forward contracts c — 1.0 — 1.0 Total financial assets $ 343.0 $ 4.7 $ — $ 347.7 Estimated Fair Value Total Fair Value (in millions) Level 1 Level 2 Level 3 Financial liabilities Derivatives designated as hedging instruments: Precious metal forward contracts d $ — $ 1.9 $ — $ 1.9 Foreign exchange forward contracts d — 4.8 — 4.8 Cross-currency swaps d — 20.2 — 20.2 Derivatives not designated as hedging instruments: Foreign exchange forward contracts d — 1.4 — 1.4 Total financial liabilities $ — $ 28.3 $ — $ 28.3 Financial assets and liabilities carried at fair value at January 31, 2017 are classified in the table below in one of the three categories described above: Estimated Fair Value Total Fair Value (in millions) Level 1 Level 2 Level 3 Financial assets Marketable securities a $ 36.4 $ — $ — $ 36.4 Time deposits b 57.8 — — 57.8 Derivatives designated as hedging instruments: Precious metal forward contracts c — 3.6 — 3.6 Precious metal collar contracts c — 0.4 — 0.4 Foreign exchange forward contracts c — 9.6 — 9.6 Derivatives not designated as hedging instruments: Foreign exchange forward contracts c — 0.3 — 0.3 Total financial assets $ 94.2 $ 13.9 $ — $ 108.1 Estimated Fair Value Total Fair Value (in millions) Level 1 Level 2 Level 3 Financial liabilities Derivatives designated as hedging instruments: Precious metal forward contracts d $ — $ 5.4 $ — $ 5.4 Precious metal collars d — 0.3 — 0.3 Foreign exchange forward contracts d — 0.6 — 0.6 Cross-currency swaps d — 0.4 — 0.4 Derivatives not designated as hedging instruments: Foreign exchange forward contracts d — 2.2 — 2.2 Total financial liabilities $ — $ 8.9 $ — $ 8.9 a Included within Other assets, net. b Included within Short-term investments. c Included within Prepaid expenses and other current assets or Other assets, net based on the maturity of the contract. d Included within Accounts payable and accrued liabilities or Other long-term liabilities based on the maturity of the contract. The fair values of cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities approximate their carrying values due to the short-term maturities of these assets and liabilities and as such are measured using Level 1 inputs. The fair value of debt with variable interest rates approximates carrying value and is measured using Level 2 inputs. The fair value of debt with fixed interest rates was determined using the quoted market prices of debt instruments with similar terms and maturities, which are considered Level 2 inputs. The total carrying value of short-term borrowings and long-term debt was $1.0 billion and $1.1 billion at January 31, 2018 and 2017 and the corresponding fair value was $1.0 billion and $1.1 billion, respectively.

Commitments and Contingencies (

Commitments and Contingencies (Notes)	12 Months Ended
Commitments and Contingencies (Notes)	Jan. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Leases The Company leases certain office, distribution, retail and manufacturing facilities, land and equipment. Retail store leases may require the payment of minimum rentals and contingent rent based on a percentage of sales exceeding a stipulated amount. The lease agreements, which expire at various dates through 2062, are subject, in many cases, to renewal options and provide for the payment of taxes, insurance and maintenance. Certain leases contain escalation clauses resulting from the pass-through of increases in operating costs, property taxes and the effect on costs from changes in consumer price indices. Rent-free periods and other incentives granted under certain leases and scheduled rent increases are charged to rent expense on a straight-line basis over the related terms of such leases, beginning from when the Company takes possession of the leased facility. Lease expense includes predetermined rent escalations (including escalations based on the Consumer Price Index or other indices) and is recorded on a straight-line basis over the term of the lease. Adjustments to indices are treated as contingent rent and recorded in the period that such adjustments are determined. The Company entered into sale-leaseback arrangements for its Retail Service Center, a distribution and administrative office facility in New Jersey, in 2005 and for the TIFFANY & CO. stores in Tokyo's Ginza shopping district and on London's Old Bond Street in 2007. These sale-leaseback arrangements resulted in total deferred gains of $144.5 million, which are being amortized in SG&A expenses over periods that range from 15 to 20 years. As of January 31, 2018 , $40.5 million of these deferred gains remained to be amortized. Rent expense for the Company's operating leases consisted of the following: Years Ended January 31, (in millions) 2018 2017 2016 Minimum rent for retail locations $ 198.7 $ 184.1 $ 172.2 Contingent rent based on sales 32.7 32.4 34.9 Office, distribution and manufacturing facilities and equipment 40.0 40.0 37.0 $ 271.4 $ 256.5 $ 244.1 In addition, the Company operates certain TIFFANY & CO. stores within various department stores outside the U.S. and has agreements where the department store operators provide store facilities and other services. The Company pays the department store operators a percentage fee based on sales generated in these locations (recorded as commission expense within SG&A expenses) which totaled $118.9 million, $117.9 million and $109.4 million in 2017 , 2016 and 2015 , respectively, and which are not included in the table above. Aggregate annual minimum rental payments under non-cancelable operating leases are as follows: Years Ending January 31, Annual Minimum Rental Payments a (in millions) 2019 $ 313.6 2020 249.4 2021 209.5 2022 185.8 2023 163.6 Thereafter 563.8 a Operating lease obligations do not include obligations for property taxes, insurance and maintenance that are required by most lease agreements. Diamond Sourcing Activities The Company has agreements with various diamond producers to purchase a minimum volume of rough diamonds at prevailing fair market prices. Under those agreements, management anticipates that it will purchase approximately $45.0 million of rough diamonds in 2018 . Purchases beyond 2018 that are contingent upon mine production at then-prevailing fair market prices cannot be reasonably estimated. In addition, the Company also regularly purchases rough and polished diamonds from other suppliers, although it has no contractual obligations to do so. Contractual Cash Obligations and Contingent Funding Commitments At January 31, 2018 , the Company's contractual cash obligations and contingent funding commitments were for inventory purchases of $268.4 million (which includes the $45.0 million obligation discussed in Diamond Sourcing Activities above), as well as for other contractual obligations of $86.6 million (primarily for construction-in-progress, technology licensing and service contracts, advertising and media agreements and fixed royalty commitments). Litigation Arbitration Award. On December 21, 2013, an award was issued (the "Arbitration Award") in favor of The Swatch Group Ltd. ("Swatch") and its wholly owned subsidiary Tiffany Watch Co. ("Watch Company"; Swatch and Watch Company, together, the "Swatch Parties") in an arbitration proceeding (the "Arbitration") between the Registrant and its wholly owned subsidiaries, Tiffany and Company and Tiffany (NJ) Inc. (the Registrant and such subsidiaries, together, the "Tiffany Parties") and the Swatch Parties. The Arbitration was initiated in June 2011 by the Swatch Parties, who sought damages for alleged breach of agreements entered into by and among the Swatch Parties and the Tiffany Parties in December 2007 (the "Agreements"). The Agreements pertained to the development and commercialization of a watch business and, among other things, contained various licensing and governance provisions and approval requirements relating to business, marketing and branding plans and provisions allocating profits relating to sales of the watch business between the Swatch Parties and the Tiffany Parties. In general terms, the Swatch Parties alleged that the Tiffany Parties breached the Agreements by obstructing and delaying development of Watch Company’s business and otherwise failing to proceed in good faith. The Swatch Parties sought damages based on alternate theories ranging from CHF 73.0 million (or approximately $78.0 million at January 31, 2018 ) (based on its alleged wasted investment) to CHF 3.8 billion (or approximately $4.1 billion at January 31, 2018 ) (calculated based on alleged future lost profits of the Swatch Parties and their affiliates over the entire term of the Agreements). The Registrant believes that the claims of the Swatch Parties are without merit. In the Arbitration, the Tiffany Parties defended against the Swatch Parties’ claims vigorously, disputing both the merits of the claims and the calculation of the alleged damages. The Tiffany Parties also asserted counterclaims for damages attributable to breach by the Swatch Parties, stemming from the Swatch Parties’ September 12, 2011 public issuance of a Notice of Termination purporting to terminate the Agreements due to alleged material breach by the Tiffany Parties, and for termination due to such breach. In general terms, the Tiffany Parties alleged that the Swatch Parties did not have grounds for termination, failed to meet the high standard for proving material breach set forth in the Agreements and failed to provide appropriate management, distribution, marketing and other resources for TIFFANY & CO. brand watches and to honor their contractual obligations to the Tiffany Parties regarding brand management. The Tiffany Parties’ counterclaims sought damages based on alternate theories ranging from CHF 120.0 million (or approximately $129.0 million at January 31, 2018 ) (based on its wasted investment) to approximately CHF 540.0 million (or approximately $578.0 million at January 31, 2018 ) (calculated based on alleged future lost profits of the Tiffany Parties). The Arbitration hearing was held in October 2012 before a three-member arbitral panel convened in the Netherlands pursuant to the Arbitration Rules of the Netherlands Arbitration Institute (the "Rules"), and the Arbitration record was completed in February 2013. Under the terms of the Arbitration Award, and at the request of the Swatch Parties and the Tiffany Parties, the Agreements were deemed terminated. The Arbitration Award stated that the effective date of termination was March 1, 2013. Pursuant to the Arbitration Award, the Tiffany Parties were ordered to pay the Swatch Parties damages of CHF 402.7 million (the "Arbitration Damages"), as well as interest from June 30, 2012 to the date of payment, two-thirds of the cost of the Arbitration and two-thirds of the Swatch Parties' legal fees, expenses and costs. These amounts were paid in full in January 2014. Prior to the ruling of the arbitral panel, no accrual was established in the Company's consolidated financial statements because management did not believe the likelihood of an award of damages to the Swatch Parties was probable. As a result of the ruling, in the fourth quarter of 2013, the Company recorded a charge of $480.2 million, which included the damages, interest, and other costs associated with the ruling and which was classified as Arbitration award expense in the consolidated statement of earnings. On March 31, 2014, the Tiffany Parties took action in the District Court of Amsterdam to annul the Arbitration Award. Generally, arbitration awards are final; however, Dutch law does provide for limited grounds on which arbitral awards may be set aside. The Tiffany Parties petitioned to annul the Arbitration Award on these statutory grounds. These grounds include, for example, that the arbitral tribunal violated its mandate by changing the express terms of the Agreements. A three-judge panel presided over the annulment hearing on January 19, 2015, and, on March 4, 2015, issued a decision in favor of the Tiffany Parties. Under this decision, the Arbitration Award was set aside. However, the Swatch Parties took action in the Dutch courts to appeal the District Court's decision, and a three-judge panel of the Appellate Court of Amsterdam presided over an appellate hearing in respect of the annulment, and the related claim by the Tiffany Parties for the return of the Arbitration Damages and related costs, on June 29, 2016. The Appellate Court issued its decision on April 25, 2017, finding in favor of the Swatch Parties and ordering the Tiffany Parties to reimburse the Swatch Parties EUR 6,340 in legal costs. The Tiffany Parties have taken action to appeal the decision of the Appellate Court to the Supreme Court of the Netherlands. As such, the Arbitration Award may ultimately be set aside by the Supreme Court. Registrant's management believes it is likely that the Supreme Court will issue its decision during Registrant's fiscal year ending January 31, 2019. However, it is possible that such decision could be later issued or that such decision could require the Appellate Court to reconsider certain elements of the dispute and, as such, the annulment action may not be ultimately resolved until, at the earliest, Registrant's fiscal year ending January 31, 2020. If the Arbitration Award is finally annulled, management anticipates that the claims and counterclaims that formed the basis of the Arbitration, and potentially additional claims and counterclaims, will be litigated in court proceedings between and among the Swatch Parties and the Tiffany Parties. The identity and location of the courts that would hear such actions have not been determined at this time. In any litigation regarding the claims and counterclaims that formed the basis of the arbitration, issues of liability and damages will be pled and determined without regard to the findings of the arbitral panel. As such, it is possible that a court could find that the Swatch Parties were in material breach of their obligations under the Agreements, that the Tiffany Parties were in material breach of their obligations under the Agreements or that neither the Swatch Parties nor the Tiffany Parties were in material breach. If the Swatch Parties’ claims of liability were accepted by the court, the damages award cannot be reasonably estimated at this time, but could exceed the Arbitration Damages and could have a material adverse effect on the Registrant’s consolidated financial statements or liquidity. Management has not established any accrual in the Company's consolidated financial statements for the year ended January 31, 2018 related to the annulment process or any potential subsequent litigation because it does not believe that the final annulment of the Arbitration Award and a subsequent award of damages exceeding the Arbitration Damages is probable. Other Litigation Matters. The Company is from time to time involved in routine litigation incidental to the conduct of its business, including proceedings to protect its trademark rights, litigation with parties claiming infringement of patents and other intellectual property rights by the Company, litigation instituted by persons alleged to have been injured upon premises under the Company's control and litigation with present and former employees and customers. Although litigation with present and former employees is routine and incidental to the conduct of the Company's business, as well as for any business employing significant numbers of employees, such litigation can result in large monetary awards when a civil jury is allowed to determine compensatory and/or punitive damages for actions such as those claiming discrimination on the basis of age, gender, race, religion, disability or other legally-protected characteristic or for termination of employment that is wrongful or in violation of implied contracts. However, the Company believes that all such litigation currently pending to which it is a party or to which its properties are subject will be resolved without any material adverse effect on the Company's financial position, earnings or cash flows. Gain Contingency. On February 14, 2013, Tiffany and Company and Tiffany (NJ) LLC (collectively, the "Tiffany plaintiffs") initiated a lawsuit against Costco Wholesale Corp. ("Costco") for trademark infringement, false designation of origin and unfair competition, trademark dilution and trademark counterfeiting (the "Costco Litigation"). The Tiffany plaintiffs sought injunctive relief, monetary recovery and statutory damages on account of Costco's use of "Tiffany" on signs in the jewelry cases at Costco stores used to describe certain diamond engagement rings that were not manufactured by Tiffany. Costco filed a counterclaim arguing that the TIFFANY trademark was a generic term for multi-pronged ring settings and seeking to have the trademark invalidated, modified or partially canceled in that respect. On September 8, 2015, the U.S. District Court for the Southern District of New York (the "Court") granted the Tiffany plaintiffs' motion for summary judgment of liability in its entirety, dismissing Costco's genericism counterclaim and finding that Costco was liable for trademark infringement, trademark counterfeiting and unfair competition under New York law in its use of "Tiffany" on the above-referenced signs. On September 29, 2016, a civil jury rendered its verdict, finding that Costco's profits on the sale of the infringing rings should be awarded at $5.5 million , and further finding that an award of punitive damages was warranted. On October 5, 2016, the jury awarded $8.25 million in punitive damages. The aggregate award of $13.75 million was not final, as it was subject to post-verdict motion practice and ultimately to adjustment by the Court. On August 14, 2017, the Court issued its ruling, finding that the Tiffany plaintiffs are entitled to recover (i) $11.1 million in respect of Costco's profits on the sale of the infringing rings (which amount is three times the amount of such profits, as determined by the Court), (ii) prejudgment interest on such amount (calculated at the applicable statutory rate) from February 15, 2013 through August 14, 2017, (iii) an additional $8.25 million in punitive damages, and (iv) Tiffany's reasonable attorneys' fees (which will be determined at a later date), and, on August 24, 2017, the Court entered judgment in the amount of $21.0 million in favor of the Tiffany plaintiffs (reflecting items (i) through (iii) above). Costco has filed an appeal from the judgment, as well as a motion in the Court for a new trial. The appeal has been automatically stayed pending determination of the Court motion. Costco has also filed an appeal bond to secure the amount of the judgment entered by the Court pending appeal, so the Tiffany plaintiffs will be unable to enforce the judgment while the motion for a new trial and the appeal are pending. As such, the Company has not recorded any amount in its consolidated financial statements related to this gain contingency as of January 31, 2018 , and expects that this matter will not ultimately be resolved until, at the earliest, the Company's fiscal year ending January 31, 2019. Environmental Matter In 2005, the U.S. Environmental Protection Agency ("EPA") designated a 17-mile stretch of the Passaic River (the "River") part of the Diamond Alkali "Superfund" site. This designation resulted from the detection of hazardous substances emanating from the site, which was previously home to the Diamond Shamrock Corporation, a manufacturer of pesticides and herbicides. Under the Superfund law, the EPA will negotiate with potentially responsible parties to agree on remediation approaches and may also enter into settlement agreements pursuant to an allocation process. The Company, which operated a silverware manufacturing facility near a tributary of the River from approximately 1897 to 1985, is one of more than 300 parties (the "Potentially Responsible Parties") designated in litigation as potentially responsible parties with respect to the River. The EPA issued general notice letters to 125 of these parties. The Company, along with approximately 70 other Potentially Responsible Parties (collectively, the "Cooperating Parties Group" or "CPG") voluntarily entered into an Administrative Settlement Agreement and Order on Consent ("AOC") with the EPA in May 2007 to perform a Remedial Investigation/Feasibility Study (the "RI/FS") of the lower 17 miles of the River. In June 2012, most of the CPG voluntarily entered into a second AOC related to focused remediation actions at Mile 10.9 of the River. The actions under the Mile 10.9 AOC are complete (except for continued monitoring), the Remedial Investigation ("RI") portion of the RI/FS was submitted to the EPA on February 19, 2015, and the Feasibility Study ("FS") portion of the RI/FS was submitted to the EPA on April 30, 2015. The Company nonetheless remained in the CPG until October 24, 2017. The Company has accrued for its financial obligations under both AOCs, which have not been material to its financial position or results of operations in previous financial periods or on a cumulative basis. The FS presented and evaluated three options for remediating the lower 17 miles of the River, including the approach recommended by the EPA in its Focused Feasibility Study discussed below, as well as a fourth option of taking no action, and recommended an approach for a targeted remediation of the entire 17-mile stretch of the River. The estimated cost of the approach recommended by the CPG in the FS is approximately $483.0 million . The RI and FS are being reviewed by the EPA and other governmental agencies and stakeholders. Ultimately, the Company expects that the EPA will identify and negotiate with any or all of the potentially responsible parties regarding any remediation action that may be necessary, and issue a Record of Decision with a proposed approach to remediating the entire lower 17-mile stretch of the River. Separately, on April 11, 2014, the EPA issued a proposed plan for remediating the lower eight miles of the River, which is supported by a Focused Feasibility Study (the "FFS"). The FFS evaluated three remediation options, as well as a fourth option of taking no action. Following a public review and comment period and the EPA's review of comments received, the EPA issued a Record of Decision on March 4, 2016 that set forth a remediation plan for the lower eight miles of the River (the "RoD Remediation"). The RoD Remediation is estimated by the EPA to cost $1.38 billion . The Record of Decision did not identify any party or parties as being responsible for the design of the remediation or for the remediation itself. The EPA did note that it estimates the design of the necessary remediation activities will take three to four years, with the remediation to follow, which is estimated to take an additional six years to complete. On March 31, 2016, the EPA issued a letter to approximately 100 companies (including the Company) (collectively, the "notified companies") notifying them of potential liability for the RoD Remediation and of the EPA’s planned approach to addressing the cost of the RoD Remediation, which included the possibility of a de-minimis cash-out settlement (the "settlement option") for certain parties. In April of 2016, the Company notified the EPA of its interest in pursuing the settlement option, and accordingly recorded an immaterial liability representing its best estimate of its minimum liability for the RoD Remediation, which reflects the possibility of a de-minimis settlement. On March 30, 2017, the EPA issued offers related to the settlement option to 20 parties; while the Company was not one of the parties receiving such an offer, the EPA has indicated that the settlement option may be made available to additional parties beyond those notified on March 30, 2017. Although the EPA must determine which additional parties are eligible for the settlement option, the Company does not expect any settlement amount that it might agree with the EPA to be material to its financial position, results of operations or cash flows. Unrelated to the settlement option, the EPA also announced, in October 2016, that it entered into a legal agreement with one of the notified companies, pursuant to which such company agreed to spend $165.0 million to perform the engineering and design work required in advance of the clean-up contemplated by the RoD Remediation (the "RoD Design Phase"). That company has waived any rights to collect contribution for those costs from the Company. In the absence of a viable settlement option, the Company is unable to determine its participation in the overall RoD Remediation (of which the RoD Design Phase is only a part), if any, relative to the other potentially responsible parties or the allocation of the estimated cost thereof among the potentially responsible parties, until such time as the EPA reaches an agreement with any potentially responsible party or parties to fund the overall RoD Remediation (or pursues legal or administrative action to require any potentially responsible party or parties to perform, or pay for, the overall RoD Remediation). With respect to the RI/FS (which is distinct from the RoD Remediation), until a Record of Decision is issued with respect to the RI/FS, neither the ultimate remedial approach for the remaining upper nine miles of the relevant 17-mile stretch of the River and its cost, nor the Company's participation, if any, relative to the other potentially responsible parties in this approach and cost, can be determined. As such, the Company's liability, if any, beyond that already recorded for (1) its obligations under the 2007 AOC and the Mile 10.9 AOC, and (2) its estimate related to a de-minimis cash-out settlement for the RoD Remediation, cannot be determined at this time. However, the Company does not expect that its ultimate liability related to the relevant 17-mile stretch of the River will be material to its financial position, in light of the number of companies that have previously been identified as Potentially Responsible Parties (i.e., the more than 300 parties that were initially designated in litigation as potentially responsible parties), which includes, but goes well beyond those approximately 70 CPG member companies that participated in the 2007 AOC and the Mile 10.9 AOC, and the Company's relative participation in the costs related to the 2007 AOC and Mile 10.9 AOC. It is nonetheless possible that any resulting liability when the uncertainties discussed above are resolved could be material to the Company's results of operations or cash flows in the period in which such uncertainties are resolved. Other Regulatory Matters The Company is subject to regulations in various jurisdictions in which the Company operates, including those related to the sale of consumer products. During the Company's regular internal quality testing in 2016, the Company identified a potential breach of its sourcing and quality standards applicable to third party vendors. The Company assessed the composition of certain of its gold products manufactured primarily by certain U.S. third-party vendors, which contained gold solder manufactured by other U.S. vendors, to determine whether such products were in compliance with applicable consumer products requirements and regulations. Following this assessment, management determined that no liability was required to be recorded. Other In the fourth quarter of 2015, the Company implemented specific cost-reduction initiatives and recorded $8.8 million of expense within SG&A expenses. These unrelated cost-reduction initiatives included severance related to staffing reductions and subleasing of certain office space for which only a portion of the Company's future rent obligations will be recovered.

Related Parties (Notes)

Related Parties (Notes)	12 Months Ended
Related Parties (Notes)	Jan. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions Disclosure [Text Block]	RELATED PARTIES A director of the Company who previously served as Chief Executive Officer until April 1, 2015, was a member of the Board of Directors of The Bank of New York Mellon through April 14, 2015. The Bank of New York Mellon serves as the Company's trustee for its Senior Notes due in 2024 and 2044, participates as a co-syndication agent and lender for its Credit Facilities, provides other general banking services and serves as the trustee for the Company's pension plan. Fees paid to the bank for services rendered and interest on debt amounted to $0.7 million in 2015 .

Stockholders' Equity (Notes)

Stockholders' Equity (Notes)	12 Months Ended
Stockholders' Equity (Notes)	Jan. 31, 2018
Equity [Abstract]
Stockholders' Equity	STOCKHOLDERS' EQUITY Accumulated Other Comprehensive Loss January 31, (in millions) 2018 2017 Accumulated other comprehensive (loss) earnings, net of tax: Foreign currency translation adjustments $ (48.0 ) $ (143.7 ) Unrealized (loss) gain on marketable securities (1.8 ) 0.8 Deferred hedging loss (22.9 ) (16.1 ) Net unrealized loss on benefit plans (65.3 ) (97.2 ) $ (138.0 ) $ (256.2 ) Additions to and reclassifications out of accumulated other comprehensive earnings (loss) were as follows: Years Ended January 31, ( in millions ) 2018 2017 2016 Foreign currency translation adjustments $ 97.9 $ 8.3 $ (59.9 ) Income tax (expense) benefit (2.2 ) (16.7 ) 0.9 Foreign currency translation adjustments, net of tax 95.7 (8.4 ) (59.0 ) Unrealized gain (loss) on marketable securities 0.2 2.7 (4.1 ) Reclassification for gain included in net earnings a (3.5 ) — (0.4 ) Income tax benefit (expense) 0.7 (0.9 ) 1.6 Unrealized (loss) gain on marketable securities, net of tax (2.6 ) 1.8 (2.9 ) Unrealized (loss) gain on hedging instruments (21.0 ) 12.1 (22.2 ) Reclassification adjustment for loss (gain) included in net earnings b 13.0 4.9 (11.7 ) Income tax benefit (expense) 1.2 (6.3 ) 12.5 Unrealized (loss) gain on hedging instruments, net of tax (6.8 ) 10.7 (21.4 ) Net actuarial gain 30.6 14.1 122.5 Amortization of net loss included in net earnings c 13.3 14.7 30.4 Amortization of prior service credit included in net earnings c (0.5 ) (0.7 ) (0.6 ) Income tax expense (11.5 ) (10.3 ) (56.6 ) Net unrealized gain on benefit plans, net of tax 31.9 17.8 95.7 Total other comprehensive earnings, net of tax $ 118.2 $ 21.9 $ 12.4 a These gains are reclassified into Other (income) expense, net. b These losses (gains) are reclassified into Interest expense and financing costs and Cost of sales (see "Note H. Hedging Instruments" for additional details). c These losses (gains) are included in the computation of net periodic pension costs (see "Note N. Employee Benefit Plans" for additional details). Stock Repurchase Program In January 2016, the Registrant's Board of Directors approved a new share repurchase program (the "2016 Program") and terminated the Company's then-existing share repurchase program, which was approved in March 2014 and had authorized the Company to repurchase up to $300.0 million of its Common Stock through open market transactions (the "2014 Program"). The 2016 Program, which will expire on January 31, 2019 , authorizes the Company to repurchase up to $500.0 million of its Common Stock through open market transactions, block trades or privately negotiated transactions. Purchases under the 2014 Program were, and purchases under the 2016 Program have been, executed under a written plan for trading securities as specified under Rule 10b5-1 promulgated under the Securities and Exchange Act of 1934, as amended, the terms of which are within the Company's discretion, subject to applicable securities laws, and are based on market conditions and the Company's liquidity needs. As of January 31, 2018 , $211.2 million remained available for repurchase under the 2016 Program. The Company's share repurchase activity was as follows: Years Ended January 31, (in millions, except per share amounts) 2018 2017 2016 Cost of repurchases $ 99.2 $ 183.6 $ 220.4 Shares repurchased and retired 1.0 2.8 2.8 Average cost per share $ 94.86 $ 65.24 $ 78.40 Cash Dividends The Company's Board of Directors declared quarterly dividends which, on an annual basis, totaled $1.95 , $1.75 and $1.58 per share of Common Stock in 2017 , 2016 and 2015 , respectively. On February 15, 2018 , the Company's Board of Directors declared a quarterly dividend of $0.50 per share of Common Stock. This dividend will be paid on April 10, 2018 to stockholders of record on March 20, 2018 .

Stock Compensation Plans (Notes

Stock Compensation Plans (Notes)	12 Months Ended
Stock Compensation Plans (Notes)	Jan. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Disclosure of Compensation Related Costs, Share-based Payments	STOCK COMPENSATION PLANS The Company has two stock compensation plans under which awards may be made: the Employee Incentive Plan and the Directors Equity Compensation Plan, both of which were approved by the Company's stockholders. No award may be made under the Employee Incentive Plan after May 22, 2024 or under the Directors Equity Compensation Plan after May 25, 2027. Under the Employee Incentive Plan, the maximum number of common shares authorized for issuance is 8.7 million. Awards may be made to employees of the Company in the form of stock options, stock appreciation rights, shares of stock (or rights to receive shares of stock) and cash. Awards made in the form of non-qualified stock options, tax-qualified incentive stock options or stock appreciation rights have a maximum term of 10 years from the grant date and may not be granted for an exercise price below fair market value. The Company has granted time-vesting restricted stock units ("RSUs"), performance-based restricted stock units ("PSUs") and stock options under the Employee Incentive Plan. Stock options and RSUs vest primarily in increments of 25% per year over four years. PSUs vest at the end of a three -year period. Vesting of all PSUs is contingent on the Company's performance against objectives established by the Compensation Committee of the Company's Board of Directors. The PSUs and RSUs require no payment from the employee. PSU and RSU payouts will be in shares of Company stock at vesting (aside from fractional dividend equivalents, which are settled in cash). Compensation expense is recognized using the fair market value of the award at the date of grant and recorded ratably over the vesting period. However, PSU compensation expense may be adjusted over the vesting period based on interim estimates of performance against the established objectives. Award holders are not entitled to receive dividends or dividend equivalents on PSUs or RSUs granted prior to January 2017 or on unvested stock options. PSUs and RSUs granted in or after January 2017 accrue dividend equivalents that may only be paid or delivered upon vesting of the underlying stock units. Under the Directors Equity Compensation Plan, the maximum number of shares of Common Stock authorized for issuance is 1.0 million (subject to adjustment); awards may be made to non-employee directors of the Company in the form of stock options or shares of stock but may not exceed $750,000 of total compensation (including without limitation non-equity compensation and the grant-date fair value of options or stock awards, or any combination of options and stock awards) that may be awarded to any one participant in any single fiscal year of the Company in connection with his or her service as a member of the Board; provided, however, that this limitation shall not apply to a non-executive chairperson of the Board. Awards made in the form of stock options may have a maximum term of 10 years from the grant date and may not be granted for an exercise price below fair market value. Director options vest immediately. Director RSUs vest at the end of a one -year period. The Company uses newly issued shares to satisfy stock option exercises and the vesting of PSUs and RSUs. The fair value of each option award is estimated on the grant date using a Black-Scholes option valuation model and compensation expense is recognized ratably over the vesting period. The valuation model uses the assumptions noted in the following table. Expected volatilities are based on historical volatility of the Company's stock. The Company uses historical data to estimate the expected term of the option that represents the period of time that options granted are expected to be outstanding. The risk-free interest rate for periods within the expected term of the option is based on the U.S. Treasury yield curve in effect at the grant date. Years Ended January 31, 2018 2017 2016 Dividend yield 1.8 % 2.0 % 1.9 % Expected volatility 22.0 % 23.8 % 28.1 % Risk-free interest rate 2.2 % 1.8 % 1.5 % Expected term in years 5 5 5 A summary of the Company's stock option activity is presented below: Number of Shares (in millions) Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term in Years Aggregate Intrinsic Value (in millions) Outstanding at January 31, 2017 2.3 $ 70.72 7.50 $ 23.8 Granted 0.7 100.25 Exercised (0.8 ) 65.72 Forfeited/canceled (0.5 ) 74.15 Outstanding at January 31, 2018 1.7 $ 84.25 7.87 $ 41.1 Exercisable at January 31, 2018 0.7 $ 73.46 5.99 $ 23.6 The weighted-average grant-date fair value of options granted for the years ended January 31, 2018 , 2017 and 2016 was $18.33 , $14.36 and $14.42 , respectively. The total intrinsic value (market value on date of exercise less grant price) of options exercised during the years ended January 31, 2018 , 2017 and 2016 was $31.2 million, $4.5 million and $2.4 million, respectively. A summary of the Company's RSU activity is presented below: Number of Shares (in millions) Weighted-Average Grant-Date Fair Value Non-vested at January 31, 2017 0.6 $ 73.33 Granted 0.3 91.69 Vested (0.2 ) 92.95 Forfeited (0.1 ) 78.58 Non-vested at January 31, 2018 0.6 $ 81.12 A summary of the Company's PSU activity is presented below: Number of Shares (in millions) Weighted-Average Grant-Date Fair Value Non-vested at January 31, 2017 0.7 $ 73.52 Granted 0.2 108.99 Vested — 83.45 Forfeited/canceled (0.4 ) 72.49 Non-vested at January 31, 2018 0.5 $ 84.85 The weighted-average grant-date fair value of RSUs granted for the years ended January 31, 2017 and 2016 was $67.46 and $80.44 , respectively. The weighted-average grant-date fair value of PSUs granted for the years ended January 31, 2017 and 2016 was $79.23 and $58.09 , respectively. As of January 31, 2018 , there was $69.4 million of total unrecognized compensation expense related to non-vested share-based compensation arrangements granted under the Employee Incentive Plan and Directors Equity Compensation Plan. The expense is expected to be recognized over a weighted-average period of 2.7 years. The total fair value of RSUs vested during the years ended January 31, 2018 , 2017 and 2016 was $22.2 million, $13.6 million and $18.0 million, respectively. The total fair value of PSUs vested during the years ended January 31, 2018 , 2017 and 2016 was $3.4 million, $6.3 million and $4.1 million, respectively. Total compensation cost for stock-based compensation awards recognized in income and the related income tax benefit was $28.0 million and $8.5 million for the year ended January 31, 2018 , $24.3 million and $7.7 million for the year ended January 31, 2017 and $24.5 million and $7.9 million for the year ended January 31, 2016 . Total stock-based compensation cost capitalized in inventory was not significant.

Employee Benefit Plans (Notes)

Employee Benefit Plans (Notes)	12 Months Ended
Employee Benefit Plans (Notes)	Jan. 31, 2018
Retirement Benefits [Abstract]
Employee Benefit Plans	EMPLOYEE BENEFIT PLANS Pensions and Other Postretirement Benefits The Company maintains the following pension plans: a noncontributory defined benefit pension plan qualified in accordance with the Internal Revenue Service Code ("Qualified Plan") covering substantially all U.S. employees hired before January 1, 2006, a non-qualified unfunded retirement income plan ("Excess Plan") covering certain U.S. employees hired before January 1, 2006 and affected by Internal Revenue Service Code compensation limits, a non-qualified unfunded Supplemental Retirement Income Plan ("SRIP") covering certain executive officers of the Company hired before January 1, 2006 and noncontributory defined benefit pension plans in certain of its international locations ("Other Plans"). Qualified Plan benefits are based on (i) average compensation in the highest paid five years of the last 10 years of employment ("average final compensation") and (ii) the number of years of service. The normal retirement age under the Qualified Plan is age 65; however, participants who retire with at least 10 years of service may elect to receive reduced retirement benefits starting at age 55. The Company funds the Qualified Plan's trust in accordance with regulatory limits to provide for current service and for the unfunded benefit obligation over a reasonable period and for current service benefit accruals. To the extent that these requirements are fully covered by assets in the Qualified Plan, the Company may elect not to make any contribution in a particular year. No cash contribution was required in 2017 and none is required in 2018 to meet the minimum funding requirements of the Employee Retirement Income Security Act. However, the Company periodically evaluates whether to make discretionary cash contributions to the Qualified Plan and made voluntary cash contributions of $15.0 million in 2017 and $120.0 million in 2016 , but currently does not expect to make such contributions in 2018 . This expectation is subject to change based on management's assessment of a variety of factors, including, but not limited to, asset performance, interest rates and changes in actuarial assumptions. The Qualified Plan, Excess Plan and SRIP exclude all employees hired on or after January 1, 2006. Instead, employees hired on or after January 1, 2006 are eligible to receive a defined contribution retirement benefit under the Employee Profit Sharing and Retirement Savings ("EPSRS") Plan (see "Employee Profit Sharing and Retirement Savings Plan" below). Employees hired before January 1, 2006 continue to be eligible for and accrue benefits under the Qualified Plan. The Excess Plan uses the same retirement benefit formula set forth in the Qualified Plan, but includes earnings that are excluded under the Qualified Plan due to Internal Revenue Service Code qualified pension plan limitations. Benefits payable under the Qualified Plan offset benefits payable under the Excess Plan. Employees vested under the Qualified Plan are vested under the Excess Plan; however, benefits under the Excess Plan are subject to forfeiture if employment is terminated for cause and, for those who leave the Company prior to age 65, if they fail to execute and adhere to noncompetition and confidentiality covenants. Under the Excess Plan, participants who retire with at least 10 years of service may elect to receive reduced retirement benefits starting at age 55. The SRIP supplements the Qualified Plan, Excess Plan and Social Security by providing additional payments upon a participant's retirement. SRIP benefits are determined by a percentage of average final compensation; this percentage increases as specified service plateaus are achieved. Benefits payable under the Qualified Plan, Excess Plan and Social Security offset benefits payable under the SRIP. Under the SRIP, benefits vest when a participant both (i) attains age 55 while employed by the Company and (ii) has provided at least 10 years of service. In certain limited circumstances, early vesting can occur due to a change in control. Benefits under the SRIP are forfeited if benefits under the Excess Plan are forfeited. Benefits for the Other Plans are typically based on monthly eligible compensation and the number of years of service. Benefits are typically payable in a lump sum upon retirement, termination, resignation or death if the participant has completed the requisite service period. The Company accounts for pension expense using the projected unit credit actuarial method for financial reporting purposes. The actuarial present value of the benefit obligation is calculated based on the expected date of separation or retirement of the Company's eligible employees. The Company provides certain health-care and life insurance benefits ("Other Postretirement Benefits") for certain retired employees and accrues the cost of providing these benefits throughout the employees' active service period until they attain full eligibility for those benefits. Substantially all of the Company's U.S. full-time employees hired on or before March 31, 2012 may become eligible for these benefits if they reach normal or early retirement age while working for the Company. The cost of providing postretirement health-care benefits is shared by the retiree and the Company, with retiree contributions evaluated annually and adjusted in order to maintain the Company/retiree cost-sharing target ratio. The life insurance benefits are noncontributory. The Company's employee and retiree health-care benefits are administered by an insurance company, and premiums on life insurance are based on prior years' claims experience. Obligations and Funded Status The following tables provide a reconciliation of benefit obligations, plan assets and funded status of the pension and other postretirement benefit plans as of the measurement date: January 31, Pension Benefits Other Postretirement Benefits (in millions) 2018 2017 2018 2017 Change in benefit obligation: Projected benefit obligation at beginning of year $ 783.7 $ 742.6 $ 72.5 $ 78.4 Service cost 17.3 17.4 2.8 2.8 Interest cost 32.0 31.6 3.0 3.1 Participants' contributions — — 1.0 1.2 MMA retiree drug subsidy — — 0.2 — Actuarial loss (gain) 21.1 15.9 1.5 (10.5 ) Benefits paid (59.4 ) (24.3 ) (2.5 ) (2.5 ) Translation 0.9 0.5 — — Projected benefit obligation at end of year 795.6 783.7 78.5 72.5 Change in plan assets: Fair value of plan assets at beginning of year 530.1 385.8 — — Actual return on plan assets 86.1 42.9 — — Employer contribution 21.3 125.7 1.3 1.3 Participants' contributions — — 1.0 1.2 MMA retiree drug subsidy — — 0.2 — Benefits paid (59.4 ) (24.3 ) (2.5 ) (2.5 ) Fair value of plan assets at end of year 578.1 530.1 — — Funded status at end of year $ (217.5 ) $ (253.6 ) $ (78.5 ) $ (72.5 ) The following tables provide additional information regarding the Company's pension plans' projected benefit obligations and assets (included in pension benefits in the table above) and accumulated benefit obligation: January 31, 2018 (in millions) Qualified Excess/SRIP Other Total Projected benefit obligation $ 662.0 $ 112.6 $ 21.0 $ 795.6 Fair value of plan assets 578.1 — — 578.1 Funded status $ (83.9 ) $ (112.6 ) $ (21.0 ) $ (217.5 ) Accumulated benefit obligation $ 600.2 $ 98.5 $ 19.3 $ 718.0 January 31, 2017 (in millions) Qualified Excess/SRIP Other Total Projected benefit obligation $ 661.5 $ 103.6 $ 18.6 $ 783.7 Fair value of plan assets 530.1 — — 530.1 Funded status $ (131.4 ) $ (103.6 ) $ (18.6 ) $ (253.6 ) Accumulated benefit obligation $ 599.0 $ 90.9 $ 16.9 $ 706.8 At January 31, 2018 , the Company had a current liability of $8.6 million and a non-current liability of $287.4 million for pension and other postretirement benefits. At January 31, 2017 , the Company had a current liability of $7.5 million and a non-current liability of $318.6 million for pension and other postretirement benefits. Amounts recognized in accumulated other comprehensive loss consist of: January 31, Pension Benefits Other Postretirement Benefits (in millions) 2018 2017 2018 2017 Net actuarial loss (gain) $ 116.5 $ 161.8 $ 1.3 $ (0.1 ) Prior service cost (credit) 0.6 0.8 (1.7 ) (2.4 ) Total before tax $ 117.1 $ 162.6 $ (0.4 ) $ (2.5 ) The estimated pre-tax amount that will be amortized from accumulated other comprehensive loss into net periodic benefit cost within the next 12 months is as follows: (in millions) Pension Benefits Other Postretirement Benefits Net actuarial loss $ 13.2 $ 0.1 Prior service cost (credit) 0.1 (0.7 ) $ 13.3 $ (0.6 ) Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Earnings Years Ended January 31, Pension Benefits Other Postretirement Benefits (in millions) 2018 2017 2016 2018 2017 2016 Service cost $ 17.3 $ 17.4 $ 22.6 $ 2.8 $ 2.8 $ 4.2 Interest cost 32.0 31.6 30.6 3.0 3.1 3.2 Expected return on plan assets (32.9 ) (23.5 ) (24.7 ) — — — Curtailments — — 0.2 — — — Amortization of prior service cost 0.2 — — (0.7 ) (0.7 ) (0.7 ) Amortization of net loss 13.2 14.7 28.9 0.1 — 1.5 Net periodic benefit cost 29.8 40.2 57.6 5.2 5.2 8.2 Net actuarial (gain) loss (32.1 ) (3.6 ) (102.1 ) 1.5 (10.5 ) (20.4 ) Recognized actuarial loss (13.2 ) (14.7 ) (28.9 ) (0.1 ) — (1.5 ) Recognized prior service (cost) credit (0.2 ) — (0.1 ) 0.7 0.7 0.7 Total recognized in other comprehensive earnings (45.5 ) (18.3 ) (131.1 ) 2.1 (9.8 ) (21.2 ) Total recognized in net periodic benefit cost and other comprehensive earnings $ (15.7 ) $ 21.9 $ (73.5 ) $ 7.3 $ (4.6 ) $ (13.0 ) Assumptions Weighted-average assumptions used to determine benefit obligations: January 31, 2018 2017 Discount rate: Qualified Plan 4.00 % 4.25 % Excess Plan/SRIP 3.75 % 4.25 % Other Plans 0.83 % 0.81 % Other Postretirement Benefits 4.00 % 4.25 % Rate of increase in compensation: Qualified Plan 3.00 % 3.00 % Excess Plan 4.25 % 4.25 % SRIP 6.50 % 6.50 % Other Plans 1.13 % 1.12 % Weighted-average assumptions used to determine net periodic benefit cost: Years Ended January 31, 2018 2017 2016 Discount rate: Qualified Plan 4.25 % 4.50 % 3.75 % Excess Plan/SRIP 4.25 % 4.25 % 3.75 % Other Plans 1.49 % 1.40 % 1.71 % Other Postretirement Benefits 4.25 % 4.50 % 3.50 % Expected return on plan assets 7.00 % 7.00 % 7.50 % Rate of increase in compensation: Qualified Plan 3.00 % 3.00 % 2.75 % Excess Plan 4.25 % 4.25 % 4.25 % SRIP 6.50 % 6.50 % 7.25 % Other Plans 1.38 % 1.38 % 1.56 % The expected long-term rate of return on Qualified Plan assets is selected by taking into account the average rate of return expected on the funds invested or to be invested to provide for benefits included in the projected benefit obligation. More specifically, consideration is given to the expected rates of return (including reinvestment asset return rates) based upon the plan's current asset mix, investment strategy and the historical performance of plan assets. For postretirement benefit measurement purposes, a 7.00% annual rate of increase in the per capita cost of covered health care was assumed for 2018 . This rate was assumed to decrease gradually to 4.75% by 2023 and remain at that level thereafter. Assumed health-care cost trend rates can affect amounts reported for the Company's postretirement health-care benefits plan. A one-percentage-point change in the assumed health-care cost trend rate would not have a significant effect on the Company's accumulated postretirement benefit obligation for the year ended January 31, 2018 or aggregate service and interest cost components of the 2017 postretirement expense. Plan Assets The Company's investment objectives related to the Qualified Plan's assets are the preservation of principal and balancing the management of interest rate risk associated with the duration of the plan's liabilities with the achievement of a reasonable rate of return over time. The Qualified Plan's assets are allocated based on an expectation that equity securities will outperform debt securities over the long term, but that as the plan's funded status (assets relative to liabilities) increases, the amount of assets allocated to fixed income securities which match the interest rate risk profile of the plan's liabilities will increase. The Company's target asset allocations based on its funded status as of January 31, 2018 is as follows: approximately 50% in equity securities; approximately 35% in fixed income securities; and approximately 15% in other securities. The Company attempts to mitigate investment risk by rebalancing asset allocation periodically. The fair value of the Qualified Plan's assets at January 31, 2018 and 2017 by asset category is as follows: Fair Value at Fair Value Measurements Using Inputs Considered as* (in millions) January 31, 2018 Level 1 Level 2 Level 3 Equity securities: U.S. equity securities $ 74.3 $ 74.3 $ — $ — Mutual fund 44.7 44.7 — — Fixed income securities: Government bonds 79.0 77.3 1.7 — Corporate bonds 115.2 — 115.2 — Other types of investments: Cash and cash equivalents 2.3 2.3 — — Mutual funds 49.6 49.6 — — Net assets in fair value hierarchy 365.1 248.2 116.9 — Investments at NAV practical expedient a 213.0 Plan assets at fair value $ 578.1 $ 248.2 $ 116.9 $ — Fair Value at Fair Value Measurements Using Inputs Considered as* (in millions) January 31, 2017 Level 1 Level 2 Level 3 Equity securities: U.S. equity securities $ 56.2 $ 56.2 $ — $ — Mutual fund 35.1 35.1 — — Fixed income securities: Government bonds 78.2 77.8 0.4 — Corporate bonds 83.8 — 83.8 — Other types of investments: Cash and cash equivalents 7.8 7.8 — — Mutual funds 36.7 36.7 — — Net assets in fair value hierarchy 297.8 213.6 84.2 — Investments at NAV practical expedient a 232.3 Plan assets at fair value $ 530.1 $ 213.6 $ 84.2 $ — * See "Note I. Fair Value of Financial Instruments" for a description of the levels of inputs. a In accordance with ASC 820-10, certain investments that are measured at fair value using the net asset value ("NAV") per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the Qualified Plan's fair value of plan assets at the end of each respective year. Valuation Techniques Investments within the fair value hierarchy. Securities traded on the national securities exchange (certain government bonds) are valued at the last reported sales price or closing price on the last business day of the fiscal year. Investments traded in the over-the-counter market and listed securities for which no sales were reported (certain government bonds, corporate bonds and mortgage obligations) are valued at the last reported bid price. Certain fixed income investments are held in separately managed accounts and those investments are valued using the underlying securities in the accounts. Investments in mutual funds are stated at fair value as determined by quoted market prices based on the NAV of shares held by the Qualified Plan at year-end. Investments in U.S. equity securities are valued at the closing price reported on the active market on which the individual securities are traded. Investments measured at NAV. This category consists of common/collective trusts and limited partnerships. Common/collective trusts include investments in U.S. and international large, middle and small capitalization equities. Investments in common/collective trusts are stated at estimated fair value, which represents the NAV of shares held by the Qualified Plan as reported by the investment advisor. The NAV is based on the value of the underlying assets owned by the common/collective trusts, minus its liabilities and then divided by the number of shares outstanding. The NAV is used as a practical expedient to estimate fair value. The Qualified Plan maintains investments in limited partnerships that are valued at estimated fair value based on financial information received from the investment advisor and/or general partner. The NAV is based on the value of the underlying assets owned by the fund, minus its liabilities and then divided by the number of shares outstanding. The NAV is used as a practical expedient to estimate fair value. Benefit Payments The Company estimates the following future benefit payments to be paid: Years Ending January 31, Pension Benefits (in millions) Other Postretirement Benefits (in millions) 2019 $ 27.1 $ 1.9 2020 27.4 2.0 2021 28.5 2.1 2022 29.8 2.2 2023 30.6 2.4 2024-2028 175.1 14.8 Employee Profit Sharing and Retirement Savings ("EPSRS") Plan The Company maintains an EPSRS Plan that covers substantially all U.S.-based employees. Under the profit-sharing feature of the EPSRS Plan, the Company made contributions, in the form of newly issued Company Common Stock through 2014, to the employees' accounts based on the achievement of certain targeted earnings objectives established by, or as otherwise determined by, the Company's Board of Directors. Beginning in 2015, these contributions were made in cash. The Company recorded related expense of $3.9 million in 2017 , $2.3 million in 2016 and no expense in 2015 . Under the retirement savings feature of the EPSRS Plan, employees who meet certain eligibility requirements may participate by contributing up to 50% of their annual compensation, not to exceed Internal Revenue Service limits, and the Company may provide a matching cash contribution of 50% of each participant's contributions, with a maximum matching contribution of 3% of each participant's total compensation. The Company recorded related expense of $8.2 million, $7.5 million and $7.3 million in 2017 , 2016 and 2015 , respectively. Contributions to both features of the EPSRS Plan are made in the following year. Under the profit-sharing feature of the EPSRS Plan, contributions are made in cash and are allocated within the respective participant's account based on investment elections made under the EPSRS Plan. If the participant has made no election, the contribution will be invested in the appropriate default target fund as determined by each participant's date of birth. Under the retirement savings portion of the EPSRS Plan, employees may invest their contributions and the related matching contribution to their accounts in a similar manner. Under both the profit-sharing and retirement savings feature, employees may elect to invest a portion of the contributions to their accounts in Company stock. At January 31, 2018 , investments in Company stock represented 20% of total EPSRS Plan assets. The EPSRS Plan provides a defined contribution retirement benefit ("DCRB") to eligible employees hired on or after January 1, 2006. Under the DCRB, the Company makes contributions each year to each employee's account at a rate based upon age and years of service. These contributions are deposited into individual accounts in each employee's name to be invested in a manner similar to the profit-sharing and retirement savings portions of the EPSRS Plan (except that DCRB contributions may not be invested in Company stock). The Company recorded related expense of $5.2 million, $4.6 million and $3.2 million in 2017 , 2016 and 2015 , respectively. Deferred Compensation Plan The Company has a non-qualified deferred compensation plan for directors, executives and certain management employees, whereby eligible participants may defer a portion of their compensation for payment at specified future dates, upon retirement, death or termination of employment. This plan also provides for an excess defined contribution retirement benefit ("Excess DC benefit") for certain eligible executives and management employees, hired on or after January 1, 2006. The Excess DC benefit is credited to the eligible employee's account, based on the compensation paid to the employee in excess of the IRS limits for contributions under the DCRB Plan. Under the plan, the deferred compensation is adjusted to reflect performance, whether positive or negative, of selected investment options chosen by each participant during the deferral period. The amounts accrued under the plans were $28.9 million and $26.5 million at January 31, 2018 and 2017 , respectively, and are reflected in Other long-term liabilities. The Company does not promise or guarantee any rate of return on amounts deferred.

Income Taxes (Notes)

Income Taxes (Notes)	12 Months Ended
Income Taxes (Notes)	Jan. 31, 2018
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	INCOME TAXES U.S. Federal Income Tax Reform On December 22, 2017, the 2017 Tax Act was enacted in the U.S. This enactment resulted in a number of significant changes to U.S. federal income tax law for U.S. taxpayers. Changes in tax law are accounted for in the period of enactment. As such, the 2017 consolidated financial statements reflect the estimated immediate tax effect of the 2017 Tax Act. The 2017 Tax Act contains a number of key provisions, including, among other items: • The reduction of the statutory U.S. federal corporate income tax rate from 35.0% to 21.0% effective January 1, 2018; • A one-time transition tax via a mandatory deemed repatriation of post-1986 undistributed foreign earnings and profits (the "Transition Tax"); • The introduction of a deduction for Foreign Derived Intangible Income ("FDII") for tax years beginning after December 31, 2017; • The introduction of a tax on global intangible low-taxed income ("GILTI") for tax years beginning after December 31, 2017; • A limitation on net interest expense deductions to 30% of adjusted taxable income for tax years beginning after December 31, 2017; • Broader limitations on the deductibility of compensation of certain highly compensated employees; • The ability to elect to accelerate tax depreciation on certain qualified assets; • The introduction of a territorial tax system providing a 100% dividends received deduction on certain qualified dividends from foreign subsidiaries for tax years beginning after December 31, 2017; • The introduction of the Base Erosion and Anti-Abuse Tax ("BEAT") for tax years beginning after December 31, 2017; and • Changes in the application of the U.S. foreign tax credit regulations for tax years beginning after December 31, 2017. Additionally, on December 22, 2017, the SEC issued SAB 118 to address the application of U.S. GAAP in situations when a registrant does not have the necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the 2017 Tax Act. Specifically, SAB 118 provides a measurement period for companies to evaluate the impacts of the 2017 Tax Act on their financial statements. This measurement period begins in the reporting period that includes the enactment date and ends when an entity has obtained, prepared and analyzed the information that was needed in order to complete the accounting requirements, and cannot exceed one year. The Company has adopted the provisions of SAB 118 with respect to the impact of the 2017 Tax Act on its consolidated financial statements. The Company has recorded an estimated net tax expense of $146.2 million as a result of the effects of the 2017 Tax Act. The tax effects recorded include: • Estimated tax expense of $94.8 million for the impact of the reduction in the U.S. statutory tax rate on the Company’s deferred tax assets and liabilities; • Estimated tax expense of $56.0 million for the Transition Tax; and • A tax benefit of $4.6 million resulting from the effect of the 21% statutory tax rate for the month of January 2018 on the Company’s annual statutory tax rate for the year ended January 31, 2018. Because the Company’s fiscal year ended on January 31, 2018, the Company’s statutory tax rate for fiscal 2017 is 33.8% rather than 35.0%. Consistent with SAB 118, the Company calculated and recorded reasonable estimates for the impact of the Transition Tax and the remeasurement of its deferred tax assets and deferred tax liabilities, as set forth above. The Company also adopted the provisions of SAB 118 as it relates to the assertion of the indefinite reinvestment of foreign earnings and profits. The charges associated with the Transition Tax and the remeasurement of the Company's deferred tax assets and deferred tax liabilities, as a result of applying the 2017 Tax Act, represent provisional amounts for which the Company’s analysis is incomplete but a reasonable estimate could be determined and recorded during the fourth quarter of 2017. Further, the impact of the 2017 Tax Act on the Company's assertion to indefinitely reinvest foreign earnings is incomplete as the Company is analyzing the relevant provisions of the 2017 Tax Act and related accounting guidance. Therefore, a provisional estimate has not been recorded or disclosed as it relates to the potential tax consequences of an actual repatriation of unremitted foreign earnings. The Company expects to account for the tax on GILTI as a period cost and thus has not adjusted any of the deferred tax assets and liabilities of its foreign subsidiaries in connection with the 2017 Tax Act. While the Company's provisional estimate for GILTI in 2017 is zero, the Company continues to evaluate this position in accordance with SAB 118 as it awaits further regulatory and accounting guidance. As the Company refines its provisional estimate calculations, further analyzes provisions of the 2017 Tax Act and any subsequent guidance related thereto, these provisional estimates could be affected, which could have a material impact on the Company's future financial results. Additionally, further regulatory or GAAP accounting guidance regarding the 2017 Tax Act could also materially affect the Company's future financial results. Income Taxes Earnings from operations before income taxes consisted of the following: Years Ended January 31, (in millions) 2018 2017 2016 United States $ 597.1 $ 478.2 $ 502.5 Foreign 163.4 198.4 207.4 $ 760.5 $ 676.6 $ 709.9 Components of the provision for income taxes were as follows: Years Ended January 31, (in millions) 2018 2017 2016 Current: Federal $ 227.9 $ 125.5 $ 175.8 State 16.7 15.4 22.3 Foreign 49.0 43.5 49.8 293.6 184.4 247.9 Deferred: Federal 94.1 36.7 (15.4 ) State 1.1 7.1 3.9 Foreign 1.6 2.3 9.6 96.8 46.1 (1.9 ) $ 390.4 $ 230.5 $ 246.0 Reconciliations of the provision for income taxes at the statutory Federal income tax rate to the Company's effective income tax rate were as follows: Years Ended January 31, 2018 2017 2016 Statutory Federal income tax rate 33.8 % 35.0 % 35.0 % State income taxes, net of Federal benefit 1.5 2.2 2.4 Foreign losses with no tax benefit 0.2 0.2 — Foreign tax rate differences (1.4 ) (2.3 ) (2.5 ) Net change in uncertain tax positions 0.2 (0.7 ) 0.5 Domestic manufacturing deduction (1.8 ) (0.9 ) (1.3 ) 2017 Tax Act 19.8 — — Other (1.0 ) 0.6 0.6 51.3 % 34.1 % 34.7 % Deferred tax assets (liabilities) consisted of the following: January 31, (in millions) 2018 2017 Deferred tax assets: Pension/postretirement benefits $ 81.2 $ 124.7 Accrued expenses 22.9 36.1 Share-based compensation 7.2 17.3 Depreciation 0.6 6.5 Amortization 6.4 10.8 Foreign and state net operating losses 9.2 25.5 Sale-leaseback 17.2 25.8 Inventory 35.8 57.6 Financial hedging instruments 8.4 11.9 Unearned income 7.7 10.6 Other 25.1 23.0 221.7 349.8 Valuation allowance (9.6 ) (24.1 ) 212.1 325.7 Deferred tax liabilities: Foreign tax credit (24.9 ) (25.8 ) Net deferred tax asset $ 187.2 $ 299.9 The Company has recorded a valuation allowance against certain deferred tax assets related to foreign net operating loss carryforwards where management has determined it is more likely than not that deferred tax assets will not be realized in the future. The overall valuation allowance relates to tax loss carryforwards and temporary differences for which no benefit is expected to be realized. Tax loss carryforwards of approximately $32.7 million exist in certain foreign jurisdictions. Whereas some of these tax loss carryforwards do not have an expiration date, others expire at various times from 2019 through 2025. The following table reconciles the unrecognized tax benefits: Years ended January 31, (in millions) 2018 2017 2016 Unrecognized tax benefits at beginning of year $ 7.2 $ 14.0 $ 12.1 Gross increases – tax positions in prior period 3.2 0.9 1.0 Gross decreases – tax positions in prior period (0.9 ) (5.0 ) (0.4 ) Gross increases – tax positions in current period 0.6 0.3 1.4 Settlements — (3.0 ) — Lapse of statute of limitations — — (0.1 ) Unrecognized tax benefits at end of year $ 10.1 $ 7.2 $ 14.0 Included in the balance of unrecognized tax benefits at January 31, 2018 , 2017 and 2016 are $1.1 million, $1.0 million and $9.1 million of tax benefits that, if recognized, would affect the effective income tax rate. The Company recognizes interest expense and penalties related to unrecognized tax benefits within the provision for income taxes. The Company recognized expense of $2.0 million and $1.7 million for interest and penalties during 2017 and 2015, respectively. No expense for interest and penalties was recognized in 2016. Accrued interest and penalties are included within Accounts payable and accrued liabilities and Other long-term liabilities, and were $10.3 million and $8.3 million at January 31, 2018 and 2017 , respectively. The Company conducts business globally, and, as a result, is subject to taxation in the U.S. and various state and foreign jurisdictions. As a matter of course, tax authorities regularly audit the Company. The Company's tax filings are currently being examined by a number of tax authorities in several jurisdictions, both in the U.S. and in foreign jurisdictions. Ongoing audits where subsidiaries have a material presence include New York City (tax years 2011 – 2013 ) and New York State (tax years 2012 – 2014 ). Tax years from 2010 –present are open to examination in the U.S. Federal jurisdiction and 2006 –present are open in various state, local and foreign jurisdictions. As part of these audits, the Company engages in discussions with taxing authorities regarding tax positions. As of January 31, 2018 , unrecognized tax benefits are not expected to change materially in the next 12 months. Future developments may result in a change in this assessment.

Segment Information (Notes)

Segment Information (Notes)	12 Months Ended
Segment Information (Notes)	Jan. 31, 2018
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION The Company's products are primarily sold in TIFFANY & CO. retail locations around the world. Net sales by geographic area are presented by attributing revenues from external customers on the basis of the country in which the merchandise is sold. In deciding how to allocate resources and assess performance, the Company's Chief Operating Decision Maker regularly evaluates the performance of its reportable segments on the basis of net sales and earnings from operations, after the elimination of inter-segment sales and transfers. The accounting policies of the reportable segments are the same as those described in "Note B. Summary of Significant Accounting Policies." Certain information relating to the Company's segments is set forth below: Years Ended January 31, (in millions) 2018 2017 2016 Net sales: Americas $ 1,870.9 $ 1,841.9 $ 1,947.0 Asia-Pacific 1,095.0 999.1 1,003.1 Japan 596.3 604.4 541.3 Europe 482.9 457.6 505.7 Total reportable segments 4,045.1 3,903.0 3,997.1 Other 124.7 98.8 107.8 $ 4,169.8 $ 4,001.8 $ 4,104.9 Earnings from operations: Americas $ 390.3 $ 373.0 $ 390.8 Asia-Pacific 286.1 256.0 264.4 Japan 207.3 204.6 199.9 Europe 86.3 81.6 97.4 Total reportable segments 970.0 915.2 952.5 Other 6.3 5.9 6.4 $ 976.3 $ 921.1 $ 958.9 Represents earnings from operations before (i) unallocated corporate expenses, (ii) interest expense, financing costs and other (income) expense, net, and (iii) other operating expenses. The Company's Chief Operating Decision Maker does not evaluate the performance of the Company's assets on a segment basis for internal management reporting and, therefore, such information is not presented. The following table sets forth a reconciliation of the segments' earnings from operations to the Company's consolidated earnings from operations before income taxes: Years Ended January 31, (in millions) 2018 2017 2016 Earnings from operations for segments $ 976.3 $ 921.1 $ 958.9 Unallocated corporate expenses (181.8 ) (161.9 ) (152.1 ) Interest expense, financing costs and other (income) expense, net (34.0 ) (44.6 ) (50.2 ) Other operating expenses — (38.0 ) (46.7 ) Earnings from operations before income taxes $ 760.5 $ 676.6 $ 709.9 Unallocated corporate expenses includes certain costs related to administrative support functions which the Company does not allocate to its segments. Such unallocated costs include those for centralized information technology, finance, legal and human resources departments. Other operating expenses in the year ended January 31, 2017 represent an impairment charge related to software costs capitalized in connection with the development of a new finished goods inventory management and merchandising information system and impairment charges related to financing arrangements with diamond mining and exploration companies. See "Note B. Summary of Significant Accounting Policies" and "Note E. Property, Plant and Equipment" for additional details on the asset impairment and "Note B. Summary of Significant Accounting Policies" for additional details on the loan impairments. Other operating expense in the year ended January 31, 2016 represents impairment charges related to a financing arrangement with Koidu and expenses related to specific cost-reduction initiatives. See "Note B. Summary of Significant Accounting Policies" for additional details on the impairment charges and "Note J. Commitments and Contingencies" for additional details related to the specific cost-reduction initiatives. Sales to unaffiliated customers and long-lived assets by geographic areas were as follows: Years Ended January 31, (in millions) 2018 2017 2016 Net sales: United States $ 1,739.0 $ 1,691.4 $ 1,795.5 Japan 596.3 604.4 541.3 Other countries 1,834.5 1,706.0 1,768.1 $ 4,169.8 $ 4,001.8 $ 4,104.9 Long-lived assets: United States $ 724.5 $ 691.3 $ 706.9 Japan 21.4 21.7 20.6 Other countries 301.4 269.0 256.7 $ 1,047.3 $ 982.0 $ 984.2 Classes of Similar Products Years Ended January 31, (in millions) 2018 2017 2016 Net sales: Jewelry collections $ 2,193.2 $ 2,043.9 $ 2,129.2 Engagement jewelry 1,065.4 1,122.0 1,142.2 Designer jewelry 551.2 529.1 526.4 All other 360.0 306.8 307.1 $ 4,169.8 $ 4,001.8 $ 4,104.9 The Jewelry collections category reflects the combination of the previously reported high, fine & solitaire jewelry and fashion jewelry categories. Additionally, jewelry bearing the name of and attributed to Jean Schlumberger, which was previously reported within the high, fine & solitaire jewelry category, has been reclassified into the Designer jewelry category. Such changes or reclassifications have been made to conform with management's current internal analysis of product sales and are reflected for each of the periods presented in the table above.

Quarterly Financial Data (Unaud

Quarterly Financial Data (Unaudited) (Notes)	12 Months Ended
Quarterly Financial Data (Unaudited) (Notes)	Jan. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information	QUARTERLY FINANCIAL DATA (UNAUDITED) 2017 Quarters Ended* (in millions, except per share amounts) April 30 July 31 October 31 January 31 a Net sales $ 899.6 $ 959.7 $ 976.2 $ 1,334.3 Gross profit 557.6 598.2 598.4 850.6 Earnings from operations 145.6 181.3 160.3 307.2 Net earnings 92.9 115.0 100.2 61.9 Net earnings per share: Basic $ 0.75 $ 0.92 $ 0.81 $ 0.50 Diluted $ 0.74 $ 0.92 $ 0.80 $ 0.50 a For the quarter ended January 31, 2018, includes net tax expense of $146.2 million , or $1.17 per diluted share, related to the estimated impact of the 2017 Tax Act (see "Note O. Income Taxes"). 2016 Quarters Ended* (in millions, except per share amounts) April 30 July 31 October 31 January 31 b Net sales $ 891.3 $ 931.6 $ 949.3 $ 1,229.6 Gross profit 545.6 577.1 579.5 788.2 Earnings from operations 134.6 174.9 155.2 256.5 Net earnings 87.5 105.7 95.1 157.8 Net earnings per share: Basic $ 0.69 $ 0.84 $ 0.76 $ 1.27 Diluted $ 0.69 $ 0.84 $ 0.76 $ 1.26 b On a pre-tax basis, includes charges for the quarter ended January 31, 2017 of: i. $25.4 million , which reduced net earnings per diluted share by $0.13 , associated with an impairment charge related to software costs capitalized in connection with the development of a new finished goods inventory management and merchandising information system (see "Note B. Summary of Significant Accounting Policies" and "Note E. Property, Plant and Equipment"); and ii. $12.6 million , which reduced net earnings per diluted share by $0.06 , associated with impairment charges related to financing arrangements with diamond mining and exploration companies (see "Note B. Summary of Significant Accounting Policies"). * The sum of quarterly amounts may not agree with full year amounts due to rounding. Basic and diluted earnings per share are computed independently for each quarter presented. Accordingly, the sum of the quarterly earnings per share may not agree with the calculated full year earnings per share.

Schedule of Valuation and Quali

Schedule of Valuation and Qualifying Accounts and Reserves (Notes)	12 Months Ended
	Jan. 31, 2018
Valuation and Qualifying Accounts [Abstract]
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]	Tiffany & Co. and Subsidiaries Schedule II - Valuation and Qualifying Accounts and Reserves (in millions) Column A Column B Column C Column D Column E Additions Description Balance at beginning of period Charged to costs and expenses Charged to other accounts Deductions Balance at end of period Year Ended January 31, 2018: Reserves deducted from assets: Accounts receivable allowances: Doubtful accounts $ 1.9 $ 3.3 $ — $ 3.0 a $ 2.2 Sales returns 9.6 7.5 — 2.1 b 15.0 Allowance for inventory liquidation and obsolescence 65.4 28.9 — 19.3 c 75.0 Allowance for inventory shrinkage 1.0 1.1 — 1.4 d 0.7 Deferred tax valuation allowance 24.1 2.3 — 16.8 e 9.6 a) Uncollectible accounts written off. b) Adjustment related to sales returns previously provided for. c) Liquidation of inventory previously written down to market. d) Physical inventory losses. e) Reversal of deferred tax valuation allowance and utilization of deferred tax loss carryforward. Tiffany & Co. and Subsidiaries Schedule II - Valuation and Qualifying Accounts and Reserves (in millions) Column A Column B Column C Column D Column E Additions Description Balance at beginning of period Charged to costs and expenses Charged to other accounts Deductions Balance at end of period Year Ended January 31, 2017: Reserves deducted from assets: Accounts receivable allowances: Doubtful accounts $ 3.2 $ 3.8 $ — $ 5.1 a $ 1.9 Sales returns 8.3 2.5 — 1.2 b 9.6 Allowance for inventory liquidation and obsolescence 59.2 19.2 — 13.0 c 65.4 Allowance for inventory shrinkage 1.2 0.5 — 0.7 d 1.0 Deferred tax valuation allowance 19.5 5.0 — 0.4 e 24.1 a) Uncollectible accounts written off. b) Adjustment related to sales returns previously provided for. c) Liquidation of inventory previously written down to market. d) Physical inventory losses. e) Reversal of deferred tax valuation allowance and utilization of deferred tax loss carryforward. Tiffany & Co. and Subsidiaries Schedule II - Valuation and Qualifying Accounts and Reserves (in millions) Column A Column B Column C Column D Column E Additions Description Balance at beginning of period Charged to costs and expenses Charged to other accounts Deductions Balance at end of period Year Ended January 31, 2016: Reserves deducted from assets: Accounts receivable allowances: Doubtful accounts $ 1.8 $ 4.4 $ — $ 3.0 a $ 3.2 Sales returns 8.8 3.5 — 4.0 b 8.3 Allowance for inventory liquidation and obsolescence 63.2 25.4 — 29.4 c 59.2 Allowance for inventory shrinkage 2.2 0.8 — 1.8 d 1.2 Deferred tax valuation allowance 16.2 5.3 — 2.0 e 19.5 a) Uncollectible accounts written off. b) Adjustment related to sales returns previously provided for. c) Liquidation of inventory previously written down to market. d) Physical inventory losses. e) Reversal of deferred tax valuation allowance and utilization of deferred tax loss carryforward.

Summary of Significant Accoun26

Summary of Significant Accounting Policies (Policies)	12 Months Ended
Summary of Significant Accounting Policies (Policies)	Jan. 31, 2018
Accounting Policies [Abstract]
Fiscal Year	Fiscal Year The Company's fiscal year ends on January 31 of the following calendar year. All references to years relate to fiscal years rather than calendar years.
Basis of Reporting	Basis of Reporting The accompanying consolidated financial statements include the accounts of Tiffany & Co. and its subsidiaries in which a controlling interest is maintained. Controlling interest is determined by majority ownership interest and the absence of substantive third-party participating rights or, in the case of variable interest entities (VIEs), if the Company has the power to significantly direct the activities of a VIE, as well as the obligation to absorb significant losses of or the right to receive significant benefits from the VIE. Intercompany accounts, transactions and profits have been eliminated in consolidation. The equity method of accounting is used for investments in which the Company has significant influence, but not a controlling interest. Certain prior year amounts have been reclassified to conform with the current year presentation. In connection with the adoption of ASU No. 2016-09 – Compensation - Stock Compensation: Improvements to Employee Share-Based Payment Accounting , certain items have been reclassified on the consolidated statement of cash flows for the years ended January 31, 2017 and 2016. See "Recently Adopted Accounting Standards" below for additional information.
Use of Estimates	Use of Estimates These financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP"); these principles require management to make certain estimates and assumptions that affect amounts reported and disclosed in the consolidated financial statements and related notes to the consolidated financial statements. Actual results could differ from these estimates and the differences could be material. Periodically, the Company reviews all significant estimates and assumptions affecting the consolidated financial statements relative to current conditions and records the effect of any necessary adjustments.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents are stated at cost plus accrued interest, which approximates fair value. Cash equivalents include highly liquid investments with an original maturity of three months or less and consist of time deposits and/or money market fund investments with a number of U.S. and non-U.S. financial institutions with high credit ratings. The Company's policy restricts the amount invested with any one financial institution.
Short-term investments	Short-Term Investments Short-term investments are classified as available-for-sale and are carried at fair value. At January 31, 2018 and 2017 , the Company's short-term available-for-sale investments consisted entirely of time deposits. At the time of purchase, management determines the appropriate classification of these investments and reevaluates such designation as of each balance sheet date.
Receivables and Finance Charges	Receivables and Financing Arrangements Receivables. The Company's accounts receivable, net primarily consists of amounts due from Credit Receivables (defined below), department store operators that host TIFFANY & CO. boutiques in their stores, third-party credit card issuers and wholesale customers. The Company maintains an allowance for doubtful accounts for estimated losses associated with outstanding accounts receivable. The allowance is determined based on a combination of factors including, but not limited to, the length of time that the receivables are past due, management's knowledge of the customer, economic and market conditions and historical write-off experiences. For the receivables associated with Tiffany & Co. credit cards ("Credit Card Receivables"), management uses various indicators to determine whether to extend credit to customers and the amount of credit. Such indicators include reviewing prior experience with the customer, including sales and collection history, and using applicants' credit reports and scores provided by credit rating agencies. Certain customers may be granted payment terms which permit purchases above a minimum amount to be paid for in equal monthly installments over a period not to exceed 12 months (together with Credit Card Receivables, "Credit Receivables"). Credit Receivables require minimum balance payments. An account is classified as overdue if a minimum balance payment has not been received within the allotted timeframe (generally 30 days), after which internal collection efforts commence. In order for the account to return to current status, full payment on all past due amounts must be received by the Company. For all Credit Receivables, once all internal collection efforts have been exhausted and management has reviewed the account, the account balance is written off and may be sent for external collection or legal action. At January 31, 2018 and 2017 , the carrying amount of the Credit Receivables (recorded in Accounts receivable, net) was $67.1 million and $ 71.9 million, of which 95% and 97% were considered current, respectively. The allowance for doubtful accounts for estimated losses associated with the Credit Receivables ( $1.3 million at January 31, 2018 and $1.1 million at January 31, 2017 ) was determined based on the factors discussed above. Finance charges earned on Credit Receivables accounts were not significant. Financing Arrangements. The Company provided financing to diamond mining and exploration companies in order to obtain rights to purchase the mine's output. Management evaluates these financing arrangements for potential impairment by reviewing the parties' financial statements along with projections and business, operational and other economic factors on a periodic basis.
Inventories	Inventories Inventories are valued at the lower of cost or net realizable value using the average cost method except for certain diamond and gemstone jewelry which uses the specific identification method.
Property, Plant and Equipment	Property, Plant and Equipment Property, plant and equipment are stated at cost less accumulated depreciation. Depreciation is calculated on a straight-line basis over the following estimated useful lives: Buildings 39 years Machinery and equipment 5-15 years Office equipment 3-8 years Software 5-10 years Furniture and fixtures 3-10 years Leasehold improvements and building improvements are amortized over the shorter of their estimated useful lives (ranging from 8-10 years) or the related lease terms or building life, respectively. Maintenance and repair costs are charged to earnings while expenditures for major renewals and improvements are capitalized. Upon the disposition of property, plant and equipment, the accumulated depreciation is deducted from the original cost and any gain or loss is reflected in current earnings. The Company capitalizes interest on borrowings during the active construction period of major capital projects. Capitalized interest is added to the cost of the underlying assets and is amortized over the useful lives of the assets. The Company's capitalized interest costs were not significant in 2017 , 2016 or 2015 . Information Systems Development Costs Eligible costs incurred during the development stage of information systems projects are capitalized and amortized over the estimated useful life of the related project. Eligible costs include those related to the purchase, development, and installation of the related software. Costs incurred prior to the development stage, as well as costs for maintenance, data conversion, training, and other general and administrative costs, are expensed as incurred. Costs that are capitalized are included in Property, Plant and Equipment, in Construction-in-progress while in the development stage and in Software once placed into service. Capitalized software costs are subject to the Company’s accounting policy related to the review of long-lived assets for impairment. See "Impairment of Long-Lived Assets" below for further details.
Intangible Assets And Key Money	Intangible Assets and Key Money Intangible assets, consisting of product rights and trademarks, are recorded at cost and are amortized on a straight-line basis over their estimated useful lives, which range from 15 to 20 years. Intangible assets are reviewed for impairment in accordance with the Company's policy for impairment of long-lived assets (see "Impairment of Long-Lived Assets" below). Key money is the amount of funds paid to a landlord or tenant to acquire the rights of tenancy under a commercial property lease for a certain property. Key money represents the "right to lease" with an automatic right of renewal. This right can be subsequently sold by the Company or can be recovered should the landlord refuse to allow the automatic right of renewal to be exercised. Key money is amortized over the estimated useful life, 39 years.
Goodwill	Goodwill Goodwill represents the excess of cost over fair value of net assets acquired in a business combination. Goodwill is evaluated for impairment annually in the fourth quarter, or when events or changes in circumstances indicate that the value of goodwill may be impaired. A qualitative assessment is first performed for each reporting unit to determine whether it is more-likely-than-not that the fair value of a reporting unit is less than its carrying value. If it is concluded that this is the case, a quantitative evaluation, based on discounted cash flows, is performed and requires management to estimate future cash flows, growth rates and economic and market conditions. If the quantitative evaluation indicates that goodwill is not recoverable, an impairment loss is calculated and recognized during that period.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets The Company reviews its long-lived assets (such as property, plant and equipment) other than goodwill for impairment when management determines that the carrying value of such assets may not be recoverable due to events or changes in circumstances. Recoverability of long-lived assets is evaluated by comparing the carrying value of the asset with its estimated future undiscounted cash flows. If the comparisons indicate that the asset is not recoverable, an impairment loss is calculated as the difference between the carrying value and the fair value of the asset and the loss is recognized during that period.
Hedging Instruments	Hedging Instruments The Company uses derivative financial instruments to mitigate a portion of its foreign currency, precious metal price and interest rate exposures. Derivative instruments are recorded on the consolidated balance sheet at their fair values, as either assets or liabilities, with an offset to current or other comprehensive earnings, depending on whether a derivative is designated as part of an effective hedge transaction and, if it is, the type of hedge transaction.
Marketable Securities	Marketable Securities The Company's marketable securities, recorded within Other assets, net, are classified as available-for-sale and are recorded at fair value with unrealized gains and losses reported as a separate component of stockholders' equity. Realized gains and losses are recorded in Other (income) expense, net. The marketable securities are held for an indefinite period of time, but may be sold in the future as changes in market conditions or economic factors occur. The fair value of the marketable securities is determined based on prevailing market prices. Gross unrealized gains and gross unrealized losses recorded within Accumulated other comprehensive loss, net of tax as of January 31, 2018 and 2017 were not significant. Realized gains or losses reclassified from other comprehensive earnings are determined on the basis of specific identification. The Company's marketable securities primarily consist of investments in mutual funds. When evaluating marketable securities for other-than-temporary impairment, the Company reviews factors such as the length of time and the extent to which fair value has been below cost basis, the financial condition of the issuer, and the Company's ability and intent to hold the investments for a period of time which may be sufficient for anticipated recovery in market value. Based on the Company's evaluations, it determined that any unrealized losses on its outstanding mutual funds were temporary in nature and, therefore, did not record any impairment charges during 2017 , 2016 or 2015 .
Merchandise and Other Customer Credits	Merchandise Credits and Deferred Revenue Merchandise credits and deferred revenue primarily represent outstanding gift cards sold to customers and outstanding credits issued to customers for returned merchandise. All such outstanding items may be tendered for future merchandise purchases. A gift card liability is established when the gift card is sold. A merchandise credit liability is established when a merchandise credit is issued to a customer for a returned item and the original sale is reversed. The liabilities are relieved and revenue is recognized when merchandise is purchased and delivered to the customer and the merchandise credit or gift card is used as a form of payment. If merchandise credits or gift cards are not redeemed over an extended period of time (for example, approximately three to five years in the U.S.), the value of the merchandise credits or gift cards is generally remitted to the applicable jurisdiction in accordance with unclaimed property laws.
Revenue Recognition	Revenue Recognition Sales are recognized at the "point of sale," which occurs when merchandise is taken in an "over-the-counter" transaction or upon receipt by a customer in a shipped transaction, such as through the Internet and catalog channels. Revenue associated with gift cards and merchandise credits is recognized upon redemption. Sales are reported net of returns, sales tax and other similar taxes. Shipping and handling fees billed to customers are included in net sales. The Company maintains a reserve for potential product returns and it records, as a reduction to sales and cost of sales, its provision for estimated product returns, which is determined based on historical experience. Additionally, outside of the U.S., the Company operates certain TIFFANY & CO. stores within various department stores. Sales transacted at these store locations are recognized at the "point of sale." The Company and these department store operators have distinct responsibilities and risks in the operation of such TIFFANY & CO. stores. The Company (i) owns and manages the merchandise; (ii) establishes retail prices; (iii) has merchandising, marketing and display responsibilities; and (iv) in almost all locations provides retail staff and bears the risk of inventory loss. The department store operators (i) provide and maintain store facilities; (ii) in almost all locations assume retail credit and certain other risks; and (iii) act for the Company in the sale of merchandise. In return for their services and use of their facilities, the department store operators retain a portion of net retail sales made in TIFFANY & CO. stores which is recorded as commission expense within Selling, general and administrative expenses.
Cost of Sales	Cost of Sales Cost of sales includes costs to internally manufacture merchandise (primarily metal, gemstones, labor and overhead), costs related to the purchase of merchandise from third-parties, inbound freight, purchasing and receiving, inspection, warehousing, internal transfers and other costs associated with distribution and merchandising. Cost of sales also includes royalty fees paid to outside designers and customer shipping and handling charges.
Selling, General and Administrative Expenses	Selling, General and Administrative ("SG&A") Expenses SG&A expenses include costs associated with the selling and marketing of products as well as administrative expenses. The types of expenses associated with these functions are store operating expenses (such as labor, rent and utilities), advertising and other corporate level administrative expense
Advertising Marketing, Public and Media Relations Costs	Advertising, Marketing, Public and Media Relations Costs Advertising, marketing, public and media relations costs include media, production, catalogs, Internet, marketing events, visual merchandising costs (in-store and window displays) and other related costs. In 2017 , 2016 and 2015 , these costs totaled $314.9 million, $299.0 million and $302.0 million, respectively, representing 7.6% , 7.5% and 7.4% of worldwide net sales, respectively. Media and production costs for print and digital advertising are expensed as incurred, while catalog costs are expensed upon first distribution.
Pre-opening Costs	Pre-Opening Costs Costs associated with the opening of new retail stores are expensed in the period incurred.
Stock-Based Compensation	Stock-Based Compensation New, modified and unvested share-based payment transactions with employees, such as stock options and restricted stock units, are measured at fair value and recognized as compensation expense over the requisite service period. Compensation expense recognized reflects an estimate of the number of awards expected to vest and incorporates an estimate of award forfeitures based on actual experience. Compensation expense is recognized on a straight-line basis over the requisite service period, which is generally the vesting period required to obtain full vesting.
Merchandise Design Activities	Merchandise Design Activities Merchandise design activities consist of conceptual formulation and design of possible products and creation of pre-production prototypes and molds. Costs associated with these activities are expensed as incurred.
Foreign Currency	Foreign Currency The functional currency of most of the Company's foreign subsidiaries and branches is the applicable local currency. Assets and liabilities are translated into U.S. dollars using the current exchange rates in effect at the balance sheet date, while revenues and expenses are translated at the average exchange rates during the period. The resulting translation adjustments are recorded as a component of Accumulated other comprehensive loss, net of tax within stockholders' equity. The Company also recognizes gains and losses associated with transactions that are denominated in foreign currencies.
Income Taxes	Income Taxes The Company accounts for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements. Under this method, deferred tax assets and liabilities are recognized by applying statutory tax rates in effect in the years in which the differences between the financial reporting and tax filing bases of existing assets and liabilities are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date. The Company records net deferred tax assets to the extent management believes these assets will more likely than not be realized. In making such determination, the Company considers all available evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax planning strategies and recent financial results. In the event management were to determine that the Company would be able to realize its deferred income tax assets in the future in excess of their net recorded amounts, the Company would make an adjustment to the valuation allowance, which would reduce the provision for income taxes. In evaluating the exposures associated with the Company's various tax filing positions, management records reserves using a more-likely-than-not recognition threshold for income tax positions taken or expected to be taken. The Registrant, its U.S. subsidiaries and the foreign branches of its U.S. subsidiaries file a consolidated Federal income tax return. The Company accounts for the impact of changes in tax legislation in the period in which the legislation is enacted. The 2017 U.S. Tax Cuts and Jobs Act (the "2017 Tax Act") was enacted on December 22, 2017 in the U.S. On that date, the Securities and Exchange Commission ("SEC") issued Staff Accounting Bulletin No. 118 ("SAB 118"), which addresses the application of U.S. GAAP in situations in which a registrant does not have necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the 2017 Tax Act. The Company has accounted for the 2017 Tax Act in accordance with the provisions of SAB 118. See "Note O. Income Taxes" for additional information on the provisions and impacts of the 2017 Tax Act and SAB 118.
Earnings Per Share	Earnings Per Share ("EPS") Basic EPS is computed as net earnings divided by the weighted-average number of common shares outstanding for the period. Diluted EPS includes the dilutive effect of the assumed exercise of stock options and unvested restricted stock units.
New Accounting Standards	New Accounting Standards In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09 – Revenue From Contracts with Customers , to clarify the principles of recognizing revenue and create common revenue recognition guidance between U.S. GAAP and International Financial Reporting Standards. The core principle of the guidance is that a company should recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. In doing so, companies will need to use more judgment and make more estimates than under ASC 605 – Revenue Recognition . These may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. In August 2015, the FASB issued ASU 2015-14 – Revenue from Contracts with Customers: Deferral of the Effective Date , deferring the effective date of ASU 2014-09 for one year to interim and annual reporting periods beginning after December 15, 2017. Early adoption was also permitted as of the original effective date (interim and annual periods beginning after December 15, 2016) and full or modified retrospective application is permitted. Subsequently, the FASB has issued a number of ASU's amending ASU 2014-09 and providing further guidance related to revenue recognition, which management continues to evaluate. The effective date and transition requirements for these amendments are the same as ASU 2014-09, as amended by ASU 2015-14. Management expects the impact of the adoption of ASU 2014-09 on the Company's consolidated financial statements will be as follows: • The Company's revenue is primarily generated from the sale of finished products to customers (primarily through the retail, e-commerce or wholesale channels). The Company's performance obligations underlying such sales, and the timing of revenue recognition related thereto, will remain substantially unchanged following the adoption of this ASU. • The Company will now recognize gift card breakage income based on the historical pattern of gift card redemptions. • The adoption of this ASU will result in a reclassification within the consolidated balance sheet of the portion of the Company's sales return reserve attributable to cost of sales from Accounts receivable, net to Other current assets beginning with the quarter ending April 30, 2018. • Management will adopt the guidance in this ASU beginning on February 1, 2018 using the modified retrospective transition approach, with the related adjustment to retained earnings reflecting the cumulative impact of applying this guidance as of the adoption date. Under this modified retrospective approach, the prior period financial statements presented are not restated. Management does not believe the adoption of this ASU will have a significant impact to the consolidated financial statements and related disclosures. In February 2016, the FASB issued ASU No. 2016-02 – Leases , which requires an entity that leases assets to recognize on the balance sheet the assets and liabilities for the rights and obligations created by those leases. Leases will be classified as either financing or operating, similar to current accounting requirements, with the applicable classification determining the pattern of expense recognition in the statement of earnings. This ASU is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018 and currently must be adopted using a modified retrospective approach. Management continues to evaluate the impact of this ASU on the consolidated financial statements, but expects that adoption will result in a significant increase in the Company's assets and liabilities. The Company's implementation project team has completed the assessment phase of the project, during which the project team compiled information to evaluate the Company's real estate, personal property and other arrangements that may meet the definition of a lease under this ASU and identified areas that may require the development of additional processes and policies. The Company's implementation project team is in the solution development phase of the project, which includes the development and implementation of any such additional processes and policies, collection of key data for each leased asset to be utilized throughout this phase of the project and selection of the practical expedients permitted under the ASU. In June 2016, the FASB issued ASU 2016-13 – Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments . ASU 2016-13 amends the impairment model to utilize an expected loss methodology in place of the currently used incurred loss methodology, which will result in more timely recognition of losses. The new standard applies to financial assets measured at amortized cost basis, including receivables that result from revenue transactions and held-to-maturity debt securities. The ASU is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019, and early adoption is permitted for fiscal years beginning after December 15, 2018. Management continues to evaluate the impact of this ASU on the consolidated financial statements. In August 2016, the FASB issued ASU 2016-15 – Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments , which provides guidance on eight specific cash flow issues in an effort to reduce diversity in practice in how certain transactions are classified within the statement of cash flows. This ASU is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. Early adoption was permitted and the amendments should be applied using a retrospective method. Management will adopt this ASU beginning on February 1, 2018 using the retrospective method. Management does not believe the adoption of this ASU will have a significant impact to the consolidated statements of cash flows and related disclosures. In October 2016, the FASB issued ASU 2016-16 – Income Taxes: Intra-Entity Transfers of Assets Other Than Inventory . This ASU eliminates the requirement to defer the recognition of current and deferred income taxes for an intra-entity asset transfer until the asset has been sold to an outside party. Therefore, under the new guidance, an entity should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. This ASU is effective for interim and annual reporting periods beginning after December 15, 2017. Early adoption was permitted as of the first interim period of 2017 and the amendments should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. Management will adopt this ASU beginning on February 1, 2018 using the modified retrospective method. Management does not believe the adoption of this ASU will have a significant impact on the consolidated financial statements. In March 2017, the FASB issued ASU 2017-07 - Compensation - Retirement Benefits: Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost . Under this ASU, only the service cost component of the net periodic benefit cost will be presented in the same income statement line item as other employee compensation costs arising from services rendered during the period, while the non-service cost components of net periodic benefit cost are required to be presented in the income statement separate from Earnings from operations. In addition, only the service cost component will be eligible for capitalization in assets. This ASU is effective for interim and annual reporting periods beginning after December 15, 2017. The amendments in this ASU will be applied retrospectively for the presentation of the components of net periodic benefit cost other than service cost in the statement of earnings, and prospectively for the capitalization of the service cost component. Management will adopt this ASU beginning on February 1, 2018. This ASU will be applied retrospectively using the practical expedient permitted by this ASU and will require the reclassification of the non-service cost components of the net periodic benefit cost from within Earnings from operations to Interest and other expenses, net. This will increase Earnings from operations for the years ended January 31, 2018 and 2017 by $14.9 million (with $6.0 million reclassified from Cost of sales and $8.9 million reclassified from SG&A expenses) and $25.2 million (with $8.7 million reclassified from Cost of sales and $16.5 million reclassified from SG&A expenses), respectively, but will have no impact on Net earnings for those periods. The requirement set forth under this ASU that allows only the service cost component of net periodic benefit cost to be capitalized is not expected to have a significant impact on the Company’s results of operations. In May 2017, the FASB issued ASU 2017-09 - Compensation-Stock Compensation: Scope of Modification Accounting , clarifying when a change to the terms or conditions of a share-based payment award must be accounted for as a modification. The new guidance requires modification accounting if the fair value, vesting condition or the classification of the award is not the same immediately before and after a change to the terms and conditions of the award. This ASU is effective prospectively for annual periods beginning after December 15, 2017 and early adoption was permitted. Accordingly, management will adopt this ASU beginning on February 1, 2018 and will apply this ASU prospectively to any share-based payment awards modified on or after February 1, 2018. In August 2017, the FASB issued ASU 2017-12 - Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities , which expands and refines hedge accounting for both financial and non-financial risk components, aligns the recognition and presentation of the effects of hedging instruments and hedged items in the financial statements, and includes certain targeted improvements to ease the application of current guidance related to the assessment of hedge effectiveness. This ASU is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years, with early adoption permitted. The amendments in this ASU should be applied on a modified retrospective basis, while presentation and disclosure requirements set forth under this ASU are required prospectively in all interim periods and fiscal years ending after the date of adoption. Management is currently evaluating the impact of this ASU on the consolidated financial statements. The simplifications to the application of hedge accounting may result in management's expanding the use of hedge accounting in future periods. Recently Adopted Accounting Standards In March 2016, the FASB issued ASU No. 2016-09 - Compensation - Stock Compensation: Improvements to Employee Share-Based Payment Accounting , which provides guidance on several aspects of accounting for share-based payment transactions, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements, as well as classification in the statement of cash flows. The Company adopted this ASU beginning on February 1, 2017 as follows: • As required upon the adoption of this new guidance, on a prospective basis, the Company recognized excess tax benefits of $6.8 million (resulting from an increase in the fair value of an award from grant date to the vesting or exercise date) in the provision for income taxes as a discrete item during the year ended January 31, 2018. This amount may not be indicative of future amounts that may be recognized, as any excess tax benefits and/or shortfalls recognized in future periods will be dependent on future stock price, employee exercise behavior and applicable tax rates. Prior to February 1, 2017, excess tax benefits were recognized in stockholders' equity. • The ASU also clarified that cash payments made to taxing authorities on the employees’ behalf for shares withheld for taxes should be presented as a financing activity. This aspect of the guidance was adopted retrospectively, as required; accordingly, the Company reclassified $2.9 million and $1.6 million of such payments from operating activities to financing activities in the consolidated statement of cash flows for the years ended January 31, 2017 and 2016, respectively. • As permitted, the Company elected to classify excess tax benefits as an operating activity in the consolidated statement of cash flows, instead of as a financing activity, and adopted this portion of the ASU retrospectively, reclassifying $0.7 million and $2.2 million to operating activities from financing activities for the years ended January 31, 2017 and 2016, respectively. • As permitted, the Company has elected to continue to estimate the impact of forfeitures when determining the amount of compensation cost to be recognized each period, rather than account for such forfeitures as they occur.

Hedging Instruments (Policies)

Hedging Instruments (Policies)	12 Months Ended
Hedging Instruments (Policies)	Jan. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Concentration Risk, Credit Risk, Policy [Policy Text Block]	Concentration of Credit Risk A number of major international financial institutions are counterparties to the Company's derivative financial instruments. The Company enters into derivative financial instrument agreements only with counterparties meeting certain credit standards (an investment grade credit rating at the time of the agreement) and limits the amount of agreements or contracts it enters into with any one party. The Company may be exposed to credit losses in the event of nonperformance by individual counterparties or the entire group of counterparties.
Derivatives, Policy [Policy Text Block]	The Company uses derivative financial instruments, including interest rate swaps, cross-currency swaps, forward contracts and net-zero-cost collar arrangements (combination of call and put option contracts) to mitigate a portion of its exposures to changes in interest rates, foreign currency exchange rates and precious metal prices. Derivative Instruments Designated as Hedging Instruments. If a derivative instrument meets certain hedge accounting criteria, it is recorded on the consolidated balance sheet at its fair value, as either an asset or a liability, with an offset to current or other comprehensive earnings, depending on whether the hedge is designated as one of the following on the date it is entered into: • Fair Value Hedge – A hedge of the exposure to changes in the fair value of a recognized asset or liability or an unrecognized firm commitment. For fair value hedge transactions, both the effective and ineffective portions of the changes in the fair value of the derivative and changes in the fair value of the item being hedged are recorded in current earnings. • Cash Flow Hedge – A hedge of the exposure to variability in the cash flows of a recognized asset, liability or a forecasted transaction. For cash flow hedge transactions, the effective portion of the changes in fair value of derivatives is reported as other comprehensive income ("OCI") and is recognized in current earnings in the period or periods during which the hedged transaction affects current earnings. Amounts excluded from the effectiveness calculation and any ineffective portions of the change in fair value of the derivative are recognized in current earnings. The Company formally documents the nature of and relationships between the hedging instruments and hedged items for a derivative to qualify as a hedge at inception and throughout the hedged period. The Company also documents its risk management objectives, strategies for undertaking the various hedge transactions and method of assessing hedge effectiveness. Additionally, for hedges of forecasted transactions, the significant characteristics and expected terms of a forecasted transaction must be identified, and it must be probable that each forecasted transaction will occur. If it were deemed probable that the forecasted transaction would not occur, the gain or loss on the derivative financial instrument would be recognized in current earnings. Derivative financial instruments qualifying for hedge accounting must maintain a specified level of effectiveness between the hedge instrument and the item being hedged, both at inception and throughout the hedged period. Derivative Instruments Not Designated as Hedging Instruments. Derivative instruments which do not meet the criteria to be designated as a hedge are recorded on the consolidated balance sheet at their fair values, as either assets or liabilities, with an offset to current earnings. The gains or losses on undesignated foreign exchange forward contracts substantially offset foreign exchange losses or gains on the underlying liabilities or transactions being hedged. The Company does not use derivative financial instruments for trading or speculative purposes.

Fair Value of Financial Instr28

Fair Value of Financial Instruments (Policies)	12 Months Ended
Fair Value of Financial Instruments (Policies)	Jan. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurement, Policy [Policy Text Block]	Level 1 – Quoted prices in active markets for identical assets or liabilities, which are considered to be most reliable. Level 2 – Observable market-based inputs or unobservable inputs that are corroborated by market data. Level 3 – Unobservable inputs reflecting the reporting entity's own assumptions, which require the most judgment.
Fair Value of Financial Instruments, Policy [Policy Text Block]	The Company's foreign exchange forward contracts, as well as its put option contracts and cross-currency swaps, are primarily valued using the appropriate foreign exchange spot rates. The Company's precious metal forward contracts and collars are primarily valued using the relevant precious metal spot rate.

Summary of Significant Accoun29

Summary of Significant Accounting Policies (Tables)	12 Months Ended
Summary of Significant Accounting Policies (Tables)	Jan. 31, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Depreciation is calculated on a straight-line basis over the following estimated useful lives: Buildings 39 years Machinery and equipment 5-15 years Office equipment 3-8 years Software 5-10 years Furniture and fixtures 3-10 years January 31, (in millions) 2018 2017 Land $ 41.8 $ 41.8 Buildings 123.0 122.5 Leasehold and building improvements 1,328.6 1,195.8 Office equipment 267.4 245.7 Software 353.2 312.4 Furniture and fixtures 311.6 281.2 Machinery and equipment 187.4 177.7 Construction-in-progress 105.1 78.6 2,718.1 2,455.7 Accumulated depreciation and amortization (1,727.6 ) (1,523.9 ) $ 990.5 $ 931.8
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Schedule of Finite-Lived Intangible Assets	The following table summarizes intangible assets and key money, included in Other assets, net, as follows: January 31, 2018 January 31, 2017 (in millions) Gross Carrying Amount Accumulated Amortization Gross Carrying Amount Accumulated Amortization Product rights $ 48.9 $ (13.5 ) $ 48.9 $ (11.0 ) Key money 36.8 (5.5 ) 31.9 (4.1 ) Trademarks 2.5 (2.5 ) 2.5 (2.5 ) $ 88.2 $ (21.5 ) $ 83.3 $ (17.6 )
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	At January 31, 2018 and 2017 , goodwill, included in Other assets, net, consisted of the following by reportable segment: (in millions) Americas Asia-Pacific Japan Europe Other Total January 31, 2016 $ 12.2 $ 0.3 $ 1.1 $ 1.0 $ 23.9 $ 38.5 Translation (0.1 ) — (0.1 ) 0.1 — (0.1 ) January 31, 2017 12.1 0.3 1.0 1.1 23.9 38.4 Translation 0.1 — — — 0.6 0.7 January 31, 2018 $ 12.2 $ 0.3 $ 1.0 $ 1.1 $ 24.5 $ 39.1
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table summarizes the reconciliation of the numerators and denominators for the basic and diluted EPS computations: Years Ended January 31, (in millions) 2018 2017 2016 Net earnings for basic and diluted EPS $ 370.1 $ 446.1 $ 463.9 Weighted-average shares for basic EPS 124.5 125.1 128.6 Incremental shares based upon the assumed exercise of stock options and unvested restricted stock units 0.6 0.4 0.5 Weighted-average shares for diluted EPS 125.1 125.5 129.1

Supplemental Cash Flow Inform30

Supplemental Cash Flow Information (Tables)	12 Months Ended
Supplemental Cash Flow Information (Tables)	Jan. 31, 2018
Supplemental Cash Flow Information [Abstract]
Supplemental Cash Flow Information-Schedule of Cash Paid During Year	Cash paid during the year for: Years Ended January 31, (in millions) 2018 2017 2016 Interest, net of interest capitalization $ 41.5 $ 40.6 $ 42.5 Income taxes $ 156.2 $ 213.9 $ 237.5
Supplemental Cash Flow Information - Supplemental Noncash Investing and Financing Activities	Supplemental noncash investing and financing activities: January 31, (in millions) 2018 2017 2016 Accrued capital expenditures $ 20.1 $ 10.7 $ 8.2

Inventories (Tables)

Inventories (Tables)	12 Months Ended
Inventories (Tables)	Jan. 31, 2018
Inventory Disclosure [Abstract]
Components of Inventories	January 31, (in millions) 2018 2017 Finished goods $ 1,314.6 $ 1,249.4 Raw materials 821.4 806.3 Work-in-process 117.5 101.9 Inventories, net $ 2,253.5 $ 2,157.6

Property, Plant and Equipment32

Property, Plant and Equipment (Tables)	12 Months Ended
Property, Plant and Equipment (Tables)	Jan. 31, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Depreciation is calculated on a straight-line basis over the following estimated useful lives: Buildings 39 years Machinery and equipment 5-15 years Office equipment 3-8 years Software 5-10 years Furniture and fixtures 3-10 years January 31, (in millions) 2018 2017 Land $ 41.8 $ 41.8 Buildings 123.0 122.5 Leasehold and building improvements 1,328.6 1,195.8 Office equipment 267.4 245.7 Software 353.2 312.4 Furniture and fixtures 311.6 281.2 Machinery and equipment 187.4 177.7 Construction-in-progress 105.1 78.6 2,718.1 2,455.7 Accumulated depreciation and amortization (1,727.6 ) (1,523.9 ) $ 990.5 $ 931.8

Accounts Payable and Accrued 33

Accounts Payable and Accrued Liabilities (Tables)	12 Months Ended
Accounts Payable and Accrued Liabilities (Tables)	Jan. 31, 2018
Payables and Accruals [Abstract]
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]	January 31, (in millions) 2018 2017 Accounts payable - trade $ 201.5 $ 108.6 Accrued compensation and commissions 110.0 96.3 Accrued sales, withholding and other taxes 24.6 26.7 Other 101.3 81.2 $ 437.4 $ 312.8

Debt (Tables)

Debt (Tables)	12 Months Ended
Debt (Tables)	Jan. 31, 2018
Debt Disclosure [Abstract]
Short-Term Borrowings	January 31, (in millions) 2018 2017 Short-term borrowings: Credit Facilities $ 33.5 $ 93.0 Other credit facilities 87.1 135.7 $ 120.6 $ 228.7
Long-Term Debt	Long-term debt: Unsecured Senior Notes: 2012 4.40% Series B Notes, due July 2042 a $ 250.0 $ 250.0 2014 3.80% Senior Notes, due October 2024 b, c 250.0 250.0 2014 4.90% Senior Notes, due October 2044 b, c 300.0 300.0 2016 0.78% Senior Notes, due August 2026 b, d 91.9 88.0 891.9 888.0 Less unamortized discounts and debt issuance costs 9.0 9.6 $ 882.9 $ 878.4 a The agreements governing these Senior Notes require repayments of $ 50.0 million in aggregate every five years beginning in July 2022. b These agreements require lump sum repayments upon maturity. c These Senior Notes were issued at a discount, which will be amortized until the debt maturity. d These Senior Notes were issued at par, ¥ 10.0 billion.
Aggregate Maturities of Long-term Debt	Aggregate maturities of long-term debt as of January 31, 2018 are as follows: Years Ending January 31, Amount a (in millions) 2019 $ 2020 — 2021 — 2022 — 2023 50.0 Thereafter 841.9 $ 891.9 a Amounts exclude any unamortized discount or premium.

Hedging Instruments (Tables)

Hedging Instruments (Tables)	12 Months Ended
Hedging Instruments (Tables)	Jan. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Notional Amounts of Outstanding Derivative Positions	(in millions) Notional Amount USD Equivalent Derivatives designated as hedging instruments: Japanese yen ¥ 16,996.8 $ 154.9 British pound £ 14.4 19.3 Derivatives not designated as hedging instruments: U.S. dollar $ 39.8 $ 39.8 Euro € 13.3 15.9 Australian Dollar AU$ 16.8 13.3 British pound £ 5.2 7.0 Czech koruna CZK 123.7 5.8 Japanese yen ¥ 876.0 8.0 Mexican peso ₱ 100.4 5.2 New Zealand dollar NZ$ 11.3 8.2 Singapore dollar S$ 29.2 21.9 Swiss franc Fr. 6.2 6.4 Cross-Currency Swap Notional Amount Effective Date Maturity Date (in billions) (in millions) July 2016 October 1, 2024 ¥ 10.6 $ 100.0 March 2017 April 1, 2027 11.0 96.1 May 2017 April 1, 2027 5.6 50.0
Information on Location and Amounts of Derivative Gains and Losses in Condensed Consolidated Financial Statements	Information on the location and amounts of derivative gains and losses in the consolidated financial statements is as follows: Years Ended January 31, 2018 2017 (in millions) Pre-Tax Gain (Loss) Recognized in OCI (Effective Portion) Pre-Tax Gain (Loss) Reclassified from Accumulated OCI into Earnings (Effective Portion) Pre-Tax Gain (Loss) Recognized in OCI (Effective Portion) Pre-Tax Gain (Loss) Reclassified from Accumulated OCI into Earnings (Effective Portion) Derivatives in Cash Flow Hedging Relationships: Foreign exchange forward contracts a $ (6.3 ) $ 0.1 $ (1.5 ) $ (1.5 ) Precious metal collars a 1.0 0.3 — — Precious metal forward contracts a 4.2 (0.9 ) 14.0 (8.5 ) Cross-currency swaps b (19.9 ) (11.1 ) (0.4 ) 6.6 Forward-starting interest rate swaps c — (1.4 ) — (1.5 ) $ (21.0 ) $ (13.0 ) $ 12.1 $ (4.9 ) a The gain or loss recognized in earnings is included within Cost of sales. b The gain or loss recognized in earnings is included within Other (income) expenses, net. c The gain or loss recognized in earnings is included within Interest expense and financing costs.

Fair Value of Financial Instr36

Fair Value of Financial Instruments (Tables)	12 Months Ended
Fair Value of Financial Instruments (Tables)	Jan. 31, 2018	Jan. 31, 2017
Fair Value Disclosures [Abstract]
Financial Assets and Liabilities Carried at Fair Value	Financial assets and liabilities carried at fair value at January 31, 2018 are classified in the table below in one of the three categories described above: Estimated Fair Value Total Fair Value (in millions) Level 1 Level 2 Level 3 Financial assets Marketable securities a $ 22.5 $ — $ — $ 22.5 Time deposits b 320.5 — — 320.5 Derivatives designated as hedging instruments: Precious metal forward contracts c — 3.6 — 3.6 Foreign exchange forward contracts c — 0.1 — 0.1 Derivatives not designated as hedging instruments: Foreign exchange forward contracts c — 1.0 — 1.0 Total financial assets $ 343.0 $ 4.7 $ — $ 347.7 Estimated Fair Value Total Fair Value (in millions) Level 1 Level 2 Level 3 Financial liabilities Derivatives designated as hedging instruments: Precious metal forward contracts d $ — $ 1.9 $ — $ 1.9 Foreign exchange forward contracts d — 4.8 — 4.8 Cross-currency swaps d — 20.2 — 20.2 Derivatives not designated as hedging instruments: Foreign exchange forward contracts d — 1.4 — 1.4 Total financial liabilities $ — $ 28.3 $ — $ 28.3	Financial assets and liabilities carried at fair value at January 31, 2017 are classified in the table below in one of the three categories described above: Estimated Fair Value Total Fair Value (in millions) Level 1 Level 2 Level 3 Financial assets Marketable securities a $ 36.4 $ — $ — $ 36.4 Time deposits b 57.8 — — 57.8 Derivatives designated as hedging instruments: Precious metal forward contracts c — 3.6 — 3.6 Precious metal collar contracts c — 0.4 — 0.4 Foreign exchange forward contracts c — 9.6 — 9.6 Derivatives not designated as hedging instruments: Foreign exchange forward contracts c — 0.3 — 0.3 Total financial assets $ 94.2 $ 13.9 $ — $ 108.1 Estimated Fair Value Total Fair Value (in millions) Level 1 Level 2 Level 3 Financial liabilities Derivatives designated as hedging instruments: Precious metal forward contracts d $ — $ 5.4 $ — $ 5.4 Precious metal collars d — 0.3 — 0.3 Foreign exchange forward contracts d — 0.6 — 0.6 Cross-currency swaps d — 0.4 — 0.4 Derivatives not designated as hedging instruments: Foreign exchange forward contracts d — 2.2 — 2.2 Total financial liabilities $ — $ 8.9 $ — $ 8.9 a Included within Other assets, net. b Included within Short-term investments. c Included within Prepaid expenses and other current assets or Other assets, net based on the maturity of the contract. d Included within Accounts payable and accrued liabilities or Other long-term liabilities based on the maturity of the contract.

Commitments and Contingencies37

Commitments and Contingencies (Tables)	12 Months Ended
Commitments and Contingencies (Tables)	Jan. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Schedule of Rent Expense [Table Text Block]	Rent expense for the Company's operating leases consisted of the following: Years Ended January 31, (in millions) 2018 2017 2016 Minimum rent for retail locations $ 198.7 $ 184.1 $ 172.2 Contingent rent based on sales 32.7 32.4 34.9 Office, distribution and manufacturing facilities and equipment 40.0 40.0 37.0 $ 271.4 $ 256.5 $ 244.1
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	Aggregate annual minimum rental payments under non-cancelable operating leases are as follows: Years Ending January 31, Annual Minimum Rental Payments a (in millions) 2019 $ 313.6 2020 249.4 2021 209.5 2022 185.8 2023 163.6 Thereafter 563.8 a Operating lease obligations do not include obligations for property taxes, insurance and maintenance that are required by most lease agreements.

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
Stockholders' Equity (Tables)	Jan. 31, 2018
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Loss January 31, (in millions) 2018 2017 Accumulated other comprehensive (loss) earnings, net of tax: Foreign currency translation adjustments $ (48.0 ) $ (143.7 ) Unrealized (loss) gain on marketable securities (1.8 ) 0.8 Deferred hedging loss (22.9 ) (16.1 ) Net unrealized loss on benefit plans (65.3 ) (97.2 ) $ (138.0 ) $ (256.2 ) Amounts recognized in accumulated other comprehensive loss consist of: January 31, Pension Benefits Other Postretirement Benefits (in millions) 2018 2017 2018 2017 Net actuarial loss (gain) $ 116.5 $ 161.8 $ 1.3 $ (0.1 ) Prior service cost (credit) 0.6 0.8 (1.7 ) (2.4 ) Total before tax $ 117.1 $ 162.6 $ (0.4 ) $ (2.5 )
Additions to and Reclassifications out of Accumulated Other Comprehensive Earnings	Additions to and reclassifications out of accumulated other comprehensive earnings (loss) were as follows: Years Ended January 31, ( in millions ) 2018 2017 2016 Foreign currency translation adjustments $ 97.9 $ 8.3 $ (59.9 ) Income tax (expense) benefit (2.2 ) (16.7 ) 0.9 Foreign currency translation adjustments, net of tax 95.7 (8.4 ) (59.0 ) Unrealized gain (loss) on marketable securities 0.2 2.7 (4.1 ) Reclassification for gain included in net earnings a (3.5 ) — (0.4 ) Income tax benefit (expense) 0.7 (0.9 ) 1.6 Unrealized (loss) gain on marketable securities, net of tax (2.6 ) 1.8 (2.9 ) Unrealized (loss) gain on hedging instruments (21.0 ) 12.1 (22.2 ) Reclassification adjustment for loss (gain) included in net earnings b 13.0 4.9 (11.7 ) Income tax benefit (expense) 1.2 (6.3 ) 12.5 Unrealized (loss) gain on hedging instruments, net of tax (6.8 ) 10.7 (21.4 ) Net actuarial gain 30.6 14.1 122.5 Amortization of net loss included in net earnings c 13.3 14.7 30.4 Amortization of prior service credit included in net earnings c (0.5 ) (0.7 ) (0.6 ) Income tax expense (11.5 ) (10.3 ) (56.6 ) Net unrealized gain on benefit plans, net of tax 31.9 17.8 95.7 Total other comprehensive earnings, net of tax $ 118.2 $ 21.9 $ 12.4 a These gains are reclassified into Other (income) expense, net. b These losses (gains) are reclassified into Interest expense and financing costs and Cost of sales (see "Note H. Hedging Instruments" for additional details). c These losses (gains) are included in the computation of net periodic pension costs (see "Note N. Employee Benefit Plans" for additional details).
Schedule Of Share Repurchases Table	The Company's share repurchase activity was as follows: Years Ended January 31, (in millions, except per share amounts) 2018 2017 2016 Cost of repurchases $ 99.2 $ 183.6 $ 220.4 Shares repurchased and retired 1.0 2.8 2.8 Average cost per share $ 94.86 $ 65.24 $ 78.40

Stock Compensation Plans (Table

Stock Compensation Plans (Tables)	12 Months Ended
Stock Compensation Plans (Tables)	Jan. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	Years Ended January 31, 2018 2017 2016 Dividend yield 1.8 % 2.0 % 1.9 % Expected volatility 22.0 % 23.8 % 28.1 % Risk-free interest rate 2.2 % 1.8 % 1.5 % Expected term in years 5 5 5
Schedule of Share-based Compensation, Activity	A summary of the Company's stock option activity is presented below: Number of Shares (in millions) Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term in Years Aggregate Intrinsic Value (in millions) Outstanding at January 31, 2017 2.3 $ 70.72 7.50 $ 23.8 Granted 0.7 100.25 Exercised (0.8 ) 65.72 Forfeited/canceled (0.5 ) 74.15 Outstanding at January 31, 2018 1.7 $ 84.25 7.87 $ 41.1 Exercisable at January 31, 2018 0.7 $ 73.46 5.99 $ 23.6
Schedule of Share-based Compensation, Restricted Stock Units Award Activity	A summary of the Company's RSU activity is presented below: Number of Shares (in millions) Weighted-Average Grant-Date Fair Value Non-vested at January 31, 2017 0.6 $ 73.33 Granted 0.3 91.69 Vested (0.2 ) 92.95 Forfeited (0.1 ) 78.58 Non-vested at January 31, 2018 0.6 $ 81.12
Schedule Of Share Based Compensation Performance Stock Units Award Activity Table	A summary of the Company's PSU activity is presented below: Number of Shares (in millions) Weighted-Average Grant-Date Fair Value Non-vested at January 31, 2017 0.7 $ 73.52 Granted 0.2 108.99 Vested — 83.45 Forfeited/canceled (0.4 ) 72.49 Non-vested at January 31, 2018 0.5 $ 84.85

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
Employee Benefit Plans (Tables)	Jan. 31, 2018
Retirement Benefits [Abstract]
Schedule of Net Funded Status	The following tables provide a reconciliation of benefit obligations, plan assets and funded status of the pension and other postretirement benefit plans as of the measurement date: January 31, Pension Benefits Other Postretirement Benefits (in millions) 2018 2017 2018 2017 Change in benefit obligation: Projected benefit obligation at beginning of year $ 783.7 $ 742.6 $ 72.5 $ 78.4 Service cost 17.3 17.4 2.8 2.8 Interest cost 32.0 31.6 3.0 3.1 Participants' contributions — — 1.0 1.2 MMA retiree drug subsidy — — 0.2 — Actuarial loss (gain) 21.1 15.9 1.5 (10.5 ) Benefits paid (59.4 ) (24.3 ) (2.5 ) (2.5 ) Translation 0.9 0.5 — — Projected benefit obligation at end of year 795.6 783.7 78.5 72.5 Change in plan assets: Fair value of plan assets at beginning of year 530.1 385.8 — — Actual return on plan assets 86.1 42.9 — — Employer contribution 21.3 125.7 1.3 1.3 Participants' contributions — — 1.0 1.2 MMA retiree drug subsidy — — 0.2 — Benefits paid (59.4 ) (24.3 ) (2.5 ) (2.5 ) Fair value of plan assets at end of year 578.1 530.1 — — Funded status at end of year $ (217.5 ) $ (253.6 ) $ (78.5 ) $ (72.5 )
Schedule of Accumulated and Projected Benefit Obligations	The following tables provide additional information regarding the Company's pension plans' projected benefit obligations and assets (included in pension benefits in the table above) and accumulated benefit obligation: January 31, 2018 (in millions) Qualified Excess/SRIP Other Total Projected benefit obligation $ 662.0 $ 112.6 $ 21.0 $ 795.6 Fair value of plan assets 578.1 — — 578.1 Funded status $ (83.9 ) $ (112.6 ) $ (21.0 ) $ (217.5 ) Accumulated benefit obligation $ 600.2 $ 98.5 $ 19.3 $ 718.0 January 31, 2017 (in millions) Qualified Excess/SRIP Other Total Projected benefit obligation $ 661.5 $ 103.6 $ 18.6 $ 783.7 Fair value of plan assets 530.1 — — 530.1 Funded status $ (131.4 ) $ (103.6 ) $ (18.6 ) $ (253.6 ) Accumulated benefit obligation $ 599.0 $ 90.9 $ 16.9 $ 706.8
Schedule of Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Loss January 31, (in millions) 2018 2017 Accumulated other comprehensive (loss) earnings, net of tax: Foreign currency translation adjustments $ (48.0 ) $ (143.7 ) Unrealized (loss) gain on marketable securities (1.8 ) 0.8 Deferred hedging loss (22.9 ) (16.1 ) Net unrealized loss on benefit plans (65.3 ) (97.2 ) $ (138.0 ) $ (256.2 ) Amounts recognized in accumulated other comprehensive loss consist of: January 31, Pension Benefits Other Postretirement Benefits (in millions) 2018 2017 2018 2017 Net actuarial loss (gain) $ 116.5 $ 161.8 $ 1.3 $ (0.1 ) Prior service cost (credit) 0.6 0.8 (1.7 ) (2.4 ) Total before tax $ 117.1 $ 162.6 $ (0.4 ) $ (2.5 )
Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year	The estimated pre-tax amount that will be amortized from accumulated other comprehensive loss into net periodic benefit cost within the next 12 months is as follows: (in millions) Pension Benefits Other Postretirement Benefits Net actuarial loss $ 13.2 $ 0.1 Prior service cost (credit) 0.1 (0.7 ) $ 13.3 $ (0.6 )
Schedule of Net Periodic Pension and Other Postretirement Benefit Expense	Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Earnings Years Ended January 31, Pension Benefits Other Postretirement Benefits (in millions) 2018 2017 2016 2018 2017 2016 Service cost $ 17.3 $ 17.4 $ 22.6 $ 2.8 $ 2.8 $ 4.2 Interest cost 32.0 31.6 30.6 3.0 3.1 3.2 Expected return on plan assets (32.9 ) (23.5 ) (24.7 ) — — — Curtailments — — 0.2 — — — Amortization of prior service cost 0.2 — — (0.7 ) (0.7 ) (0.7 ) Amortization of net loss 13.2 14.7 28.9 0.1 — 1.5 Net periodic benefit cost 29.8 40.2 57.6 5.2 5.2 8.2 Net actuarial (gain) loss (32.1 ) (3.6 ) (102.1 ) 1.5 (10.5 ) (20.4 ) Recognized actuarial loss (13.2 ) (14.7 ) (28.9 ) (0.1 ) — (1.5 ) Recognized prior service (cost) credit (0.2 ) — (0.1 ) 0.7 0.7 0.7 Total recognized in other comprehensive earnings (45.5 ) (18.3 ) (131.1 ) 2.1 (9.8 ) (21.2 ) Total recognized in net periodic benefit cost and other comprehensive earnings $ (15.7 ) $ 21.9 $ (73.5 ) $ 7.3 $ (4.6 ) $ (13.0 )
Schedule of Assumptions Used	Weighted-average assumptions used to determine benefit obligations: January 31, 2018 2017 Discount rate: Qualified Plan 4.00 % 4.25 % Excess Plan/SRIP 3.75 % 4.25 % Other Plans 0.83 % 0.81 % Other Postretirement Benefits 4.00 % 4.25 % Rate of increase in compensation: Qualified Plan 3.00 % 3.00 % Excess Plan 4.25 % 4.25 % SRIP 6.50 % 6.50 % Other Plans 1.13 % 1.12 % Weighted-average assumptions used to determine net periodic benefit cost: Years Ended January 31, 2018 2017 2016 Discount rate: Qualified Plan 4.25 % 4.50 % 3.75 % Excess Plan/SRIP 4.25 % 4.25 % 3.75 % Other Plans 1.49 % 1.40 % 1.71 % Other Postretirement Benefits 4.25 % 4.50 % 3.50 % Expected return on plan assets 7.00 % 7.00 % 7.50 % Rate of increase in compensation: Qualified Plan 3.00 % 3.00 % 2.75 % Excess Plan 4.25 % 4.25 % 4.25 % SRIP 6.50 % 6.50 % 7.25 % Other Plans 1.38 % 1.38 % 1.56 %
Fair Value Of Companys Qualified Plan Assets	The fair value of the Qualified Plan's assets at January 31, 2018 and 2017 by asset category is as follows: Fair Value at Fair Value Measurements Using Inputs Considered as* (in millions) January 31, 2018 Level 1 Level 2 Level 3 Equity securities: U.S. equity securities $ 74.3 $ 74.3 $ — $ — Mutual fund 44.7 44.7 — — Fixed income securities: Government bonds 79.0 77.3 1.7 — Corporate bonds 115.2 — 115.2 — Other types of investments: Cash and cash equivalents 2.3 2.3 — — Mutual funds 49.6 49.6 — — Net assets in fair value hierarchy 365.1 248.2 116.9 — Investments at NAV practical expedient a 213.0 Plan assets at fair value $ 578.1 $ 248.2 $ 116.9 $ — Fair Value at Fair Value Measurements Using Inputs Considered as* (in millions) January 31, 2017 Level 1 Level 2 Level 3 Equity securities: U.S. equity securities $ 56.2 $ 56.2 $ — $ — Mutual fund 35.1 35.1 — — Fixed income securities: Government bonds 78.2 77.8 0.4 — Corporate bonds 83.8 — 83.8 — Other types of investments: Cash and cash equivalents 7.8 7.8 — — Mutual funds 36.7 36.7 — — Net assets in fair value hierarchy 297.8 213.6 84.2 — Investments at NAV practical expedient a 232.3 Plan assets at fair value $ 530.1 $ 213.6 $ 84.2 $ — * See "Note I. Fair Value of Financial Instruments" for a description of the levels of inputs. a In accordance with ASC 820-10, certain investments that are measured at fair value using the net asset value ("NAV") per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the Qualified Plan's fair value of plan assets at the end of each respective year.
Schedule of Expected Benefit Payments	he Company estimates the following future benefit payments to be paid: Years Ending January 31, Pension Benefits (in millions) Other Postretirement Benefits (in millions) 2019 $ 27.1 $ 1.9 2020 27.4 2.0 2021 28.5 2.1 2022 29.8 2.2 2023 30.6 2.4 2024-2028 175.1 14.8

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
Income Taxes (Tables)	Jan. 31, 2018
Income Tax Disclosure [Abstract]
Schedule of Income before Income Tax, Domestic and Foreign	Earnings from operations before income taxes consisted of the following: Years Ended January 31, (in millions) 2018 2017 2016 United States $ 597.1 $ 478.2 $ 502.5 Foreign 163.4 198.4 207.4 $ 760.5 $ 676.6 $ 709.9
Schedule of Components of Income Tax Expense (Benefit)	Components of the provision for income taxes were as follows: Years Ended January 31, (in millions) 2018 2017 2016 Current: Federal $ 227.9 $ 125.5 $ 175.8 State 16.7 15.4 22.3 Foreign 49.0 43.5 49.8 293.6 184.4 247.9 Deferred: Federal 94.1 36.7 (15.4 ) State 1.1 7.1 3.9 Foreign 1.6 2.3 9.6 96.8 46.1 (1.9 ) $ 390.4 $ 230.5 $ 246.0
Schedule of Effective Income Tax Rate Reconciliation	Reconciliations of the provision for income taxes at the statutory Federal income tax rate to the Company's effective income tax rate were as follows: Years Ended January 31, 2018 2017 2016 Statutory Federal income tax rate 33.8 % 35.0 % 35.0 % State income taxes, net of Federal benefit 1.5 2.2 2.4 Foreign losses with no tax benefit 0.2 0.2 — Foreign tax rate differences (1.4 ) (2.3 ) (2.5 ) Net change in uncertain tax positions 0.2 (0.7 ) 0.5 Domestic manufacturing deduction (1.8 ) (0.9 ) (1.3 ) 2017 Tax Act 19.8 — — Other (1.0 ) 0.6 0.6 51.3 % 34.1 % 34.7 %
Schedule of Deferred Tax Assets and Liabilities	Deferred tax assets (liabilities) consisted of the following: January 31, (in millions) 2018 2017 Deferred tax assets: Pension/postretirement benefits $ 81.2 $ 124.7 Accrued expenses 22.9 36.1 Share-based compensation 7.2 17.3 Depreciation 0.6 6.5 Amortization 6.4 10.8 Foreign and state net operating losses 9.2 25.5 Sale-leaseback 17.2 25.8 Inventory 35.8 57.6 Financial hedging instruments 8.4 11.9 Unearned income 7.7 10.6 Other 25.1 23.0 221.7 349.8 Valuation allowance (9.6 ) (24.1 ) 212.1 325.7 Deferred tax liabilities: Foreign tax credit (24.9 ) (25.8 ) Net deferred tax asset $ 187.2 $ 299.9
Summary of Income Tax Contingencies	The following table reconciles the unrecognized tax benefits: Years ended January 31, (in millions) 2018 2017 2016 Unrecognized tax benefits at beginning of year $ 7.2 $ 14.0 $ 12.1 Gross increases – tax positions in prior period 3.2 0.9 1.0 Gross decreases – tax positions in prior period (0.9 ) (5.0 ) (0.4 ) Gross increases – tax positions in current period 0.6 0.3 1.4 Settlements — (3.0 ) — Lapse of statute of limitations — — (0.1 ) Unrecognized tax benefits at end of year $ 10.1 $ 7.2 $ 14.0

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
Segment Information (Tables)	Jan. 31, 2018
Segment Reporting [Abstract]
Company's Segments Information	Certain information relating to the Company's segments is set forth below: Years Ended January 31, (in millions) 2018 2017 2016 Net sales: Americas $ 1,870.9 $ 1,841.9 $ 1,947.0 Asia-Pacific 1,095.0 999.1 1,003.1 Japan 596.3 604.4 541.3 Europe 482.9 457.6 505.7 Total reportable segments 4,045.1 3,903.0 3,997.1 Other 124.7 98.8 107.8 $ 4,169.8 $ 4,001.8 $ 4,104.9 Earnings from operations: Americas $ 390.3 $ 373.0 $ 390.8 Asia-Pacific 286.1 256.0 264.4 Japan 207.3 204.6 199.9 Europe 86.3 81.6 97.4 Total reportable segments 970.0 915.2 952.5 Other 6.3 5.9 6.4 $ 976.3 $ 921.1 $ 958.9 Represents earnings from operations before (i) unallocated corporate expenses, (ii) interest expense, financing costs and other (income) expense, net, and (iii) other operating expenses.
Reconciliation of Segments' Earnings from Operations to Company's Consolidated Earnings from Operations Before Income Taxes	The following table sets forth a reconciliation of the segments' earnings from operations to the Company's consolidated earnings from operations before income taxes: Years Ended January 31, (in millions) 2018 2017 2016 Earnings from operations for segments $ 976.3 $ 921.1 $ 958.9 Unallocated corporate expenses (181.8 ) (161.9 ) (152.1 ) Interest expense, financing costs and other (income) expense, net (34.0 ) (44.6 ) (50.2 ) Other operating expenses — (38.0 ) (46.7 ) Earnings from operations before income taxes $ 760.5 $ 676.6 $ 709.9
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas	Sales to unaffiliated customers and long-lived assets by geographic areas were as follows: Years Ended January 31, (in millions) 2018 2017 2016 Net sales: United States $ 1,739.0 $ 1,691.4 $ 1,795.5 Japan 596.3 604.4 541.3 Other countries 1,834.5 1,706.0 1,768.1 $ 4,169.8 $ 4,001.8 $ 4,104.9 Long-lived assets: United States $ 724.5 $ 691.3 $ 706.9 Japan 21.4 21.7 20.6 Other countries 301.4 269.0 256.7 $ 1,047.3 $ 982.0 $ 984.2
Revenue from External Customers by Products and Services	Classes of Similar Products Years Ended January 31, (in millions) 2018 2017 2016 Net sales: Jewelry collections $ 2,193.2 $ 2,043.9 $ 2,129.2 Engagement jewelry 1,065.4 1,122.0 1,142.2 Designer jewelry 551.2 529.1 526.4 All other 360.0 306.8 307.1 $ 4,169.8 $ 4,001.8 $ 4,104.9

Quarterly Financial Data (Una43

Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
Quarterly Financial Data (Unaudited) (Tables)	Jan. 31, 2018	Jan. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information	2017 Quarters Ended* (in millions, except per share amounts) April 30 July 31 October 31 January 31 a Net sales $ 899.6 $ 959.7 $ 976.2 $ 1,334.3 Gross profit 557.6 598.2 598.4 850.6 Earnings from operations 145.6 181.3 160.3 307.2 Net earnings 92.9 115.0 100.2 61.9 Net earnings per share: Basic $ 0.75 $ 0.92 $ 0.81 $ 0.50 Diluted $ 0.74 $ 0.92 $ 0.80 $ 0.50 a For the quarter ended January 31, 2018, includes net tax expense of $146.2 million , or $1.17 per diluted share, related to the estimated impact of the 2017 Tax Act (see "Note O. Income Taxes").	2016 Quarters Ended* (in millions, except per share amounts) April 30 July 31 October 31 January 31 b Net sales $ 891.3 $ 931.6 $ 949.3 $ 1,229.6 Gross profit 545.6 577.1 579.5 788.2 Earnings from operations 134.6 174.9 155.2 256.5 Net earnings 87.5 105.7 95.1 157.8 Net earnings per share: Basic $ 0.69 $ 0.84 $ 0.76 $ 1.27 Diluted $ 0.69 $ 0.84 $ 0.76 $ 1.26 b On a pre-tax basis, includes charges for the quarter ended January 31, 2017 of: i. $25.4 million , which reduced net earnings per diluted share by $0.13 , associated with an impairment charge related to software costs capitalized in connection with the development of a new finished goods inventory management and merchandising information system (see "Note B. Summary of Significant Accounting Policies" and "Note E. Property, Plant and Equipment"); and ii. $12.6 million , which reduced net earnings per diluted share by $0.06 , associated with impairment charges related to financing arrangements with diamond mining and exploration companies (see "Note B. Summary of Significant Accounting Policies"). * The sum of quarterly amounts may not agree with full year amounts due to rounding.

Summary of Significant Accoun44

Summary of Significant Accounting Policies Receivables and Financing Arrangements (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan impairment charges	$ 12.6	$ 3	$ 12.6	$ 37.9
Consumer Credit Card Financing Receivables	$ 71.9	$ 67.1	$ 71.9
Consumer Credit Card Financing Receivables Percentage Current	97.00%	95.00%	97.00%
Consumer Credit Card Financing Receivable Allowance For Credit Losses	$ 1.1	$ 1.3	$ 1.1
Financing Receivables Gross Current	4.6		4.6
Financing Receivables Gross Non Current	$ 4.4		4.4
Koidu Limited [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross		43.8
Loan impairment charges		4.2	$ 37.9
Loans and Leases Receivable, Net Amount		1.7
Proceeds from Sale of Finance Receivables		1.7
Other Diamond Mining and Exploration Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan impairment charges		$ 8.4

Summary of Significant Accoun45

Summary of Significant Accounting Policies Property, Plant & Equipment (Details)	12 Months Ended
	Jan. 31, 2018
Building [Member]
Useful Lives [Line Items]
Property, Plant and Equipment, Useful Life	39 years
Minimum [Member] \| Machinery and Equipment [Member]
Useful Lives [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Minimum [Member] \| Office Equipment [Member]
Useful Lives [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Minimum [Member] \| Software and Software Development Costs [Member]
Useful Lives [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Minimum [Member] \| Furniture and Fixtures [Member]
Useful Lives [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Maximum [Member] \| Building Improvements [Member]
Useful Lives [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Maximum [Member] \| Leasehold Improvements [Member]
Useful Lives [Line Items]
Property, Plant and Equipment, Useful Life	8 years
Maximum [Member] \| Machinery and Equipment [Member]
Useful Lives [Line Items]
Property, Plant and Equipment, Useful Life	15 years
Maximum [Member] \| Office Equipment [Member]
Useful Lives [Line Items]
Property, Plant and Equipment, Useful Life	8 years
Maximum [Member] \| Software and Software Development Costs [Member]
Useful Lives [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Maximum [Member] \| Furniture and Fixtures [Member]
Useful Lives [Line Items]
Property, Plant and Equipment, Useful Life	10 years

Summary of Significant Accoun46

Summary of Significant Accounting Policies Intangibles (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 88.2	$ 83.3
Finite-Lived Intangible Assets, Accumulated Amortization	(21.5)	(17.6)
Product Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	48.9	48.9
Finite-Lived Intangible Assets, Accumulated Amortization	$ (13.5)	(11)
Key Money Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	39 years
Finite-Lived Intangible Assets, Gross	$ 36.8	31.9
Finite-Lived Intangible Assets, Accumulated Amortization	(5.5)	(4.1)
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	2.5	2.5
Finite-Lived Intangible Assets, Accumulated Amortization	$ (2.5)	$ (2.5)
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	20 years

Summary of Significant Accoun47

Summary of Significant Accounting Policies Additional Intangible (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Amortization of Intangible Assets	$ 3.4	$ 3.4	$ 3.7
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	3.6
Finite-Lived Intangible Assets, Amortization Expense, Year Two	3.6
Finite-Lived Intangible Assets, Amortization Expense, Year Three	3.6
Finite-Lived Intangible Assets, Amortization Expense, Year Four	3.6
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 3.6

Summary of Significant Accoun48

Summary of Significant Accounting Policies Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 38.4	$ 38.5
Goodwill, Translation Adjustments	0.7	(0.1)
Goodwill, ending balance	39.1	38.4
Americas [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	12.1	12.2
Goodwill, Translation Adjustments	0.1	(0.1)
Goodwill, ending balance	12.2	12.1
Asia-Pacific [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	0.3	0.3
Goodwill, Translation Adjustments	0	0
Goodwill, ending balance	0.3	0.3
Japan [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	1	1.1
Goodwill, Translation Adjustments	0	(0.1)
Goodwill, ending balance	1	1
Europe [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	1.1	1
Goodwill, Translation Adjustments	0	0.1
Goodwill, ending balance	1.1	1.1
Other [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	23.9	23.9
Goodwill, Translation Adjustments	0.6	0
Goodwill, ending balance	$ 24.5	$ 23.9

Summary of Significant Accoun49

Summary of Significant Accounting Policies Impairment of Long-Lived Assets (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Property, Plant and Equipment [Abstract]
Asset impairment charges	$ 25.4	$ 10	$ 25.4	$ 0

Summary of Significant Accoun50

Summary of Significant Accounting Policies Advertising (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Marketing and Advertising Expense [Abstract]
Advertising, Marketing, Public and Media Relations Costs	$ 314.9	$ 299	$ 302
Advertising costs as Percentage of Net Sales	7.60%	7.50%	7.40%

Summary of Significant Accoun51

Summary of Significant Accounting Policies Foreign Currency (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Foreign Currency [Abstract]
Net Gain (Loss) on Foreign Currency Transactions	$ (5.3)	$ (4.8)	$ (9.8)

Summary of Significant Accoun52

Summary of Significant Accounting Policies Earnings Per Share (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended										12 Months Ended
	Jan. 31, 2018	[1]	Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	[2]	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount											0.6	1.3	0.8
Net earnings	$ 61.9		$ 100.2	$ 115	$ 92.9	$ 157.8		$ 95.1	$ 105.7	$ 87.5	$ 370.1	$ 446.1	$ 463.9
Basic											124.5	125.1	128.6
Incremental shares based upon the assumed exercise of stock options and unvested restricted stock units											0.6	0.4	0.5
Weighted Average Number of Shares Outstanding, Diluted											125.1	125.5	129.1

[1]	For the quarter ended January 31, 2018, includes net tax expense of $146.2 million, or $1.17 per diluted share, related to the estimated impact of the 2017 Tax Act (see "Note O. Income Taxes").
[2]	On a pre-tax basis, includes charges for the quarter ended January 31, 2017 of: i.$25.4 million, which reduced net earnings per diluted share by $0.13, associated with an impairment charge related to software costs capitalized in connection with the development of a new finished goods inventory management and merchandising information system (see "Note B. Summary of Significant Accounting Policies" and "Note E. Property, Plant and Equipment"); andii.$12.6 million, which reduced net earnings per diluted share by $0.06, associated with impairment charges related to financing arrangements with diamond mining and exploration companies (see "Note B. Summary of Significant Accounting Policies").

Summary of Significant Accoun53

Summary of Significant Accounting Policies New Accounting Standards (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Earnings from operations before income taxes	$ 760.5	$ 676.6	$ 709.9
Cost of sales (reclassified from ASU implementation)	1,565.1	1,511.5	1,613.6
Selling, general and administrative expenses (reclassified from ASU implementation)	1,810.2	1,769.1	1,731.2
Payments Related to Tax Withholding for Share-based Compensation	(8.7)	(2.9)	(1.6)
Accounting Standards Update 2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Effective tax rate reconciliation, based based compensation, excess tax benefit	6.8
Excess tax benefit from share-based compensation, operating activities		0.7	$ 2.2
Accounting Standards Update 2017-07 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Earnings from operations before income taxes	14.9	25.2
Cost of sales (reclassified from ASU implementation)	(6)	(8.7)
Selling, general and administrative expenses (reclassified from ASU implementation)	$ (8.9)	$ (16.5)

Supplemental Cash Flow Inform54

Supplemental Cash Flow Information Cash Paid (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Supplemental Cash Flow Information [Abstract]
Interest, net of interest capitalization	$ 41.5	$ 40.6	$ 42.5
Income Taxes	$ 156.2	$ 213.9	$ 237.5

Supplemental Cash Flow Inform55

Supplemental Cash Flow Information Non Cash Disclosures (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Supplemental Cash Flow Information [Abstract]
Accrued capital expenditures	$ 20.1	$ 10.7	$ 8.2

Inventories - Components of Inv

Inventories - Components of Inventories (Details) - USD ($) $ in Millions	Jan. 31, 2018	Jan. 31, 2017
Inventory Disclosure [Abstract]
Finished goods	$ 1,314.6	$ 1,249.4
Raw materials	821.4	806.3
Work-in-process	117.5	101.9
Inventories, net	$ 2,253.5	$ 2,157.6

Property, Plant and Equipment57

Property, Plant and Equipment (Details) - USD ($) $ in Millions	Jan. 31, 2018	Jan. 31, 2017
Property, Plant and Equipment [Abstract]
Land	$ 41.8	$ 41.8
Buildings	123	122.5
Leasehold And Building Improvements	1,328.6	1,195.8
Office Equipment	267.4	245.7
Software	353.2	312.4
Furniture and Fixtures	311.6	281.2
Machinery and Equipment	187.4	177.7
Construction-in-Progress	105.1	78.6
Property, Plant and Equipment, Gross	2,718.1	2,455.7
Accumulated Depreciation and Amortization	(1,727.6)	(1,523.9)
Property, Plant and Equipment, Net	$ 990.5	$ 931.8

Property, Plant and Equipment P

Property, Plant and Equipment Property, Plant and Equipment Additional (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Property, Plant and Equipment [Abstract]
Depreciation and amortization expense		$ 200.8	$ 202.5	$ 196.3
Asset impairment charges	$ 25.4	$ 10	$ 25.4	$ 0

Accounts Payable and Accrued 59

Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Millions	Jan. 31, 2018	Jan. 31, 2017
Payables and Accruals [Abstract]
Accounts payable- trade	$ 201.5	$ 108.6
Accrued compensation and commissions	110	96.3
Accured sales, witholding and other taxes	24.6	26.7
Other	101.3	81.2
Accounts Payable and Accrued Liabilities	$ 437.4	$ 312.8

Debt Short-term Debt Table (Det

Debt Short-term Debt Table (Details) - USD ($) $ in Millions	Jan. 31, 2018	Jan. 31, 2017
Short-term Debt [Line Items]
Short-term borrowings	$ 120.6	$ 228.7
Credit Facilities [Member]
Short-term Debt [Line Items]
Short-term borrowings	33.5	93
Other Credit Facilities [Member]
Short-term Debt [Line Items]
Short-term borrowings	$ 87.1	$ 135.7

Debt Long Term Debt Table (Deta

Debt Long Term Debt Table (Details) ¥ in Millions, $ in Millions		Jan. 31, 2018JPY (¥)	Jan. 31, 2018USD ($)	Jan. 31, 2017USD ($)
Debt Instrument [Line Items]
Long-term debt, including current maturities			$ 891.9	$ 888
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net			9	9.6
Long-term debt			$ 882.9	878.4
2010 1.72% Notes, due September 2016 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.72%	1.72%
Debt Instrument, Face Amount \| ¥		¥ 10,000
2012 4.40% Series B Notes, due July 2042 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.40%	4.40%
Debt Instrument, Face Amount			$ 250
Long-term debt, including current maturities	[1]		$ 250	250
2014 3.80% Senior Notes, due October 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.80%	3.80%
Long-term debt, including current maturities	[2],[3]		$ 250	250
2014 4.90% Senior Notes, due October 2044 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.90%	4.90%
Long-term debt, including current maturities	[2],[3]		$ 300	300
2016 0.78% Senior Notes, due August 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		0.78%	0.78%
Debt Instrument, Face Amount		¥ 10,000	$ 91.9
Long-term debt, including current maturities	[3],[4]		$ 91.9	$ 88

[1]	The agreements governing these Senior Notes require repayments of $50.0 million in aggregate every five years beginning in July 2022.
[2]	These Senior Notes were issued at a discount, which will be amortized until the debt maturity.
[3]	These agreements require lump sum repayments upon maturity.
[4]	These Senior Notes were issued at par, ¥10.0 billion.

Debt Senior Notes (Details)

Debt Senior Notes (Details) ¥ in Millions, $ in Millions	12 Months Ended
Debt Senior Notes (Details) ¥ in Millions, $ in Millions	Jan. 31, 2018USD ($)	Jan. 31, 2017USD ($)	Jan. 31, 2016USD ($)	Jan. 31, 2018JPY (¥)	Jan. 31, 2018USD ($)
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt	$ 0	$ 98.1	$ 0
2012 4.40% Series B Notes, due July 2042 [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal	$ 50
Debt Instrument, Face Amount					$ 250
Debt Instrument, Interest Rate, Stated Percentage				4.40%	4.40%
2014 3.80% Senior Notes, due October 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				3.80%	3.80%
2014 4.90% Senior Notes, due October 2044 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				4.90%	4.90%
2016 0.78% Senior Notes, due August 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount				¥ 10,000	$ 91.9
Debt Instrument, Interest Rate, Stated Percentage				0.78%	0.78%
2010 1.72% Notes, due September 2016 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount \| ¥				¥ 10,000
Debt Instrument, Interest Rate, Stated Percentage				1.72%	1.72%

Debt Credit Facilities (Details

Debt Credit Facilities (Details) ¥ in Millions, $ in Millions	12 Months Ended
	Jan. 31, 2018CNY (¥)	Jan. 31, 2017USD ($)	Jan. 31, 2018USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 750
Short-term borrowings		$ 228.7	120.6
Four-year Credit Facility maturing October 2019 [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			375
Line of Credit Facility, Expiration Date	Oct. 7, 2019
Five-year Credit Facility maturing October 2020 [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			375
Line of Credit Facility, Expiration Date	Oct. 7, 2020
Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity		653	709.7
Letters of Credit		4	6.8
Line of Credit Facility, Amount Outstanding		$ 93	$ 33.5
Line of Credit Facility, Interest Rate at Period End	1.10%	1.72%	1.10%
Short-term borrowings		$ 93	$ 33.5
2013 Tiffany Shanghai Credit Agreement [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity \| ¥	¥ 930
2016 Tiffany Shanghai Credit Agreement [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity		103.6	112.7
Line of Credit Facility, Amount Outstanding		$ 40.2	$ 43.8
Line of Credit Facility, Interest Rate at Period End	4.35%	4.35%	4.35%
Line of Credit Facility, Maximum Borrowing Capacity	¥ 990		$ 156.5
Line of Credit Facility, Expiration Date	Jul. 11, 2019
Other Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate During Period	6.87%	2.99%
Line of Credit Facility, Amount Outstanding		$ 95.5	43.3
Line of Credit Facility, Maximum Borrowing Capacity		137.3	139
Short-term borrowings		$ 135.7	$ 87.1
Federal Funds Rate [Member] \| Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, basis spread on Federal Funds Rate	0.50%		0.50%
London Interbank Offered Rate (LIBOR) [Member] \| Credit Facilities [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, basis spread on LIBOR	1.00%		1.00%

Debt Commercial Paper Program (

Debt Commercial Paper Program (Details) $ in Millions	12 Months Ended
Debt Commercial Paper Program (Details) $ in Millions	Jan. 31, 2018USD ($)
Short-term Debt [Line Items]
Commercial Paper, Maximum Borrowing Capacity	$ 750
Commercial Paper & Credit Facilities borrowing capacity	$ 750

Debt Covenants (Details)

Debt Covenants (Details)	12 Months Ended
Debt Covenants (Details)	Jan. 31, 2018
Debt Disclosure [Abstract]
Debt Instrument, Covenant Compliance	At January 31, 2018, the Company was in compliance with all debt covenants.

Debt Maturities (Details)

Debt Maturities (Details) $ in Millions	Jan. 31, 2018USD ($)
Debt Disclosure [Abstract]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$ 0
Long-term Debt, Maturities, Repayments of Principal in Year Two	0
Long-term Debt, Maturities, Repayments of Principal in Year Three	0
Long-term Debt, Maturities, Repayments of Principal in Year Four	0
Long-term Debt, Maturities, Repayments of Principal in Year Five	50
Long-term Debt, Maturities, Repayments of Principal after Year Five	841.9
Long-term Debt	$ 891.9

Debt Letters of Credit (Details

Debt Letters of Credit (Details) $ in Millions	Jan. 31, 2018USD ($)
Letters of Credit Disclosure [Abstract]
Available Letters Of Credit And Financial Guarantees	$ 81.2
Letters Of Credit And Financial Guarantees Outstanding	22.6
Letters Of Credit And Financial Guarantees Current	$ 60.1

Hedging Instruments - Schedule

Hedging Instruments - Schedule of Notional Amounts of Outstanding Derivative Positions (Details) - 12 months ended Jan. 31, 2018 € in Millions, ¥ in Millions, £ in Millions, SFr in Millions, Kč in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions	JPY (¥)	USD ($)	AUD ($)	GBP (£)	SGD ($)	EUR (€)	NZD ($)	MXN ($)	CZK (Kč)	CHF (SFr)
Foreign Exchange Forward [Member] \| Not Designated as Hedging Instrument [Member] \| Japan, Yen
Derivative [Line Items]
Derivative, Notional Amount	¥ 876	$ 8
Foreign Exchange Forward [Member] \| Not Designated as Hedging Instrument [Member] \| United Kingdom, Pounds
Derivative [Line Items]
Derivative, Notional Amount		7		£ 5.2
Foreign Exchange Forward [Member] \| Not Designated as Hedging Instrument [Member] \| United States of America, Dollars
Derivative [Line Items]
Derivative, Notional Amount		39.8
Foreign Exchange Forward [Member] \| Not Designated as Hedging Instrument [Member] \| Euro Member Countries, Euro
Derivative [Line Items]
Derivative, Notional Amount		15.9				€ 13.3
Foreign Exchange Forward [Member] \| Not Designated as Hedging Instrument [Member] \| Australia, Dollars
Derivative [Line Items]
Derivative, Notional Amount		13.3	$ 16.8
Foreign Exchange Forward [Member] \| Not Designated as Hedging Instrument [Member] \| Czech Republic, Koruny
Derivative [Line Items]
Derivative, Notional Amount		5.8							Kč 123.7
Foreign Exchange Forward [Member] \| Not Designated as Hedging Instrument [Member] \| Mexico, Pesos
Derivative [Line Items]
Derivative, Notional Amount		5.2						$ 100.4
Foreign Exchange Forward [Member] \| Not Designated as Hedging Instrument [Member] \| New Zealand, Dollars
Derivative [Line Items]
Derivative, Notional Amount		8.2					$ 11.3
Foreign Exchange Forward [Member] \| Not Designated as Hedging Instrument [Member] \| Singapore, Dollars
Derivative [Line Items]
Derivative, Notional Amount		21.9			$ 29.2
Foreign Exchange Forward [Member] \| Not Designated as Hedging Instrument [Member] \| Switzerland, Francs
Derivative [Line Items]
Derivative, Notional Amount		6.4								SFr 6.2
Foreign Exchange Forward [Member] \| Cash Flow Hedging [Member] \| Japan, Yen
Derivative [Line Items]
Derivative, Notional Amount	16,996.8	154.9
Foreign Exchange Forward [Member] \| Cash Flow Hedging [Member] \| United Kingdom, Pounds
Derivative [Line Items]
Derivative, Notional Amount		19.3		£ 14.4
July 2016 [Member]
Derivative [Line Items]
Derivative, Notional Amount	¥ 10,600	100
July 2016 [Member] \| Currency Swap [Member]
Derivative [Line Items]
Derivative, Maturity Date	Oct. 1, 2024
March 2017 [Member]
Derivative [Line Items]
Derivative, Notional Amount	¥ 11,000	96
March 2017 [Member] \| Currency Swap [Member]
Derivative [Line Items]
Derivative, Maturity Date	Apr. 1, 2027
May 2017 [Member]
Derivative [Line Items]
Derivative, Notional Amount	¥ 5,600	$ 50
May 2017 [Member] \| Currency Swap [Member]
Derivative [Line Items]
Derivative, Maturity Date	Apr. 1, 2027

Hedging Instruments - Additiona

Hedging Instruments - Additional Information (Details) $ in Millions	12 Months Ended
	Jan. 31, 2018USD ($)oz
Derivative [Line Items]
Expected approximate amount of net pre-tax derivative gains included in accumulated other comprehensive income that will be reclassified into earnings within the next 12 months	$ 0.5
2012 4.40% Series B Notes, due July 2042 [Member]
Derivative [Line Items]
Debt Instrument, Face Amount	250
Interest Rate Swap [Member] \| 2012 Debt Issuance [Member]
Derivative [Line Items]
Unrealized loss on interest rate swaps	18.5
Interest Rate Swap [Member] \| 2014 Debt Issuance [Member]
Derivative [Line Items]
Unrealized loss on interest rate swaps	$ 3.7
Foreign Exchange Forward [Member] \| Maximum [Member]
Derivative [Line Items]
Derivative, Term of Contract	12 months
Foreign Exchange Forward [Member] \| Other expense (income), net [Domain] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (9.2)
Precious Metal Forward Contracts [Member] \| Maximum [Member]
Derivative [Line Items]
Derivative, Term of Contract	17 months
Platinum [Member]
Derivative [Line Items]
Notional amount of precious metal hedge (in ounces) \| oz	45,000
Silver [Member]
Derivative [Line Items]
Notional amount of precious metal hedge (in ounces) \| oz	900,000
Gold [Member]
Derivative [Line Items]
Notional amount of precious metal hedge (in ounces) \| oz	37,200

Hedging Instruments - Informati

Hedging Instruments - Information on Location and Amounts of Derivative Gains and Losses in Consolidated Financial Statements (Details) - Cash Flow Hedging [Member] - USD ($) $ in Millions		12 Months Ended
		Jan. 31, 2018	Jan. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Pre-Tax Gain (Loss) Recognized in OCI (Effective Portion)		$ (21)	$ 12.1
Gain (Loss) Reclassified from Accumulated OCI into Earnings (Effective Portion)		(13)	(4.9)
Foreign Exchange Forward [Member] \| Cost of sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Pre-Tax Gain (Loss) Recognized in OCI (Effective Portion)		(6.3)	(1.5)
Gain (Loss) Reclassified from Accumulated OCI into Earnings (Effective Portion)	[1]	0.1	(1.5)
Precious metal collars [Member] \| Cost of sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Pre-Tax Gain (Loss) Recognized in OCI (Effective Portion)		1	0
Gain (Loss) Reclassified from Accumulated OCI into Earnings (Effective Portion)	[1]	0.3	0
Precious Metal Forward Contracts [Member] \| Cost of sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Pre-Tax Gain (Loss) Recognized in OCI (Effective Portion)		4.2	14
Gain (Loss) Reclassified from Accumulated OCI into Earnings (Effective Portion)	[1]	(0.9)	(8.5)
Currency Swap [Member] \| Other (income) expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Pre-Tax Gain (Loss) Recognized in OCI (Effective Portion)		(19.9)	(0.4)
Gain (Loss) Reclassified from Accumulated OCI into Earnings (Effective Portion)	[2]	(11.1)	6.6
Interest Rate Swap [Member] \| Interest expense and financing costs [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Pre-Tax Gain (Loss) Recognized in OCI (Effective Portion)		0	0
Gain (Loss) Reclassified from Accumulated OCI into Earnings (Effective Portion)	[3]	$ (1.4)	$ (1.5)

[1]	The gain or loss recognized in earnings is included within Cost of sales.
[2]	The gain or loss recognized in earnings is included within Interest expense and financing costs.
[3]	The gain or loss recognized in earnings is included within Other (income) expenses, net.

Fair Value of Financial Instr71

Fair Value of Financial Instruments - Financial Assets and Liabilities Carried at Fair Value (Details) - USD ($) $ in Millions		Jan. 31, 2018	Jan. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets, Fair Value		$ 347.7	$ 108.1
Total financial liabilities, Fair Value		28.3	8.9
Other assets, net [Member] \| Marketable securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Assets, Fair Value	[1]	22.5	36.4
Short-term Investments [Member] \| Bank Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Assets, Fair Value	[2]	320.5	57.8
Prepaid expenses and other current assets [Member] \| Cash Flow Hedging [Member] \| Precious Metal Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value	[3]	3.6	3.6
Prepaid expenses and other current assets [Member] \| Cash Flow Hedging [Member] \| Precious metal collars [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value	[3]		0.4
Prepaid expenses and other current assets [Member] \| Cash Flow Hedging [Member] \| Foreign Exchange Forward [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value	[3]	0.1	9.6
Prepaid expenses and other current assets [Member] \| Not Designated as Hedging Instrument [Member] \| Foreign Exchange Forward [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value	[3]	1	0.3
Accounts Payable and Accrued Liabilities [Member] \| Cash Flow Hedging [Member] \| Precious Metal Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value	[4]	1.9	5.4
Accounts Payable and Accrued Liabilities [Member] \| Cash Flow Hedging [Member] \| Precious metal collars [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value	[4]		0.3
Accounts Payable and Accrued Liabilities [Member] \| Cash Flow Hedging [Member] \| Foreign Exchange Forward [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value	[4]	4.8	0.6
Accounts Payable and Accrued Liabilities [Member] \| Cash Flow Hedging [Member] \| Currency Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value	[4]	20.2	0.4
Accounts Payable and Accrued Liabilities [Member] \| Not Designated as Hedging Instrument [Member] \| Foreign Exchange Forward [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value	[4]	1.4	2.2
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets, Fair Value		343	94.2
Total financial liabilities, Fair Value		0	0
Level 1 [Member] \| Other assets, net [Member] \| Marketable securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Assets, Fair Value	[1]	22.5	36.4
Level 1 [Member] \| Short-term Investments [Member] \| Bank Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Assets, Fair Value	[2]	320.5	57.8
Level 1 [Member] \| Prepaid expenses and other current assets [Member] \| Cash Flow Hedging [Member] \| Precious Metal Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value	[3]	0	0
Level 1 [Member] \| Prepaid expenses and other current assets [Member] \| Cash Flow Hedging [Member] \| Precious metal collars [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value	[3]		0
Level 1 [Member] \| Prepaid expenses and other current assets [Member] \| Cash Flow Hedging [Member] \| Foreign Exchange Forward [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value	[3]	0	0
Level 1 [Member] \| Prepaid expenses and other current assets [Member] \| Not Designated as Hedging Instrument [Member] \| Foreign Exchange Forward [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value	[3]	0	0
Level 1 [Member] \| Accounts Payable and Accrued Liabilities [Member] \| Cash Flow Hedging [Member] \| Precious Metal Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value	[4]	0	0
Level 1 [Member] \| Accounts Payable and Accrued Liabilities [Member] \| Cash Flow Hedging [Member] \| Precious metal collars [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value	[4]		0
Level 1 [Member] \| Accounts Payable and Accrued Liabilities [Member] \| Cash Flow Hedging [Member] \| Foreign Exchange Forward [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value	[4]	0	0
Level 1 [Member] \| Accounts Payable and Accrued Liabilities [Member] \| Cash Flow Hedging [Member] \| Currency Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value	[4]	0	0
Level 1 [Member] \| Accounts Payable and Accrued Liabilities [Member] \| Not Designated as Hedging Instrument [Member] \| Foreign Exchange Forward [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value	[4]	0	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets, Fair Value		4.7	13.9
Total financial liabilities, Fair Value		28.3	8.9
Level 2 [Member] \| Other assets, net [Member] \| Marketable securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Assets, Fair Value	[1]	0	0
Level 2 [Member] \| Short-term Investments [Member] \| Bank Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Assets, Fair Value	[2]	0	0
Level 2 [Member] \| Prepaid expenses and other current assets [Member] \| Cash Flow Hedging [Member] \| Precious Metal Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value	[3]	3.6	3.6
Level 2 [Member] \| Prepaid expenses and other current assets [Member] \| Cash Flow Hedging [Member] \| Precious metal collars [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value	[3]		0.4
Level 2 [Member] \| Prepaid expenses and other current assets [Member] \| Cash Flow Hedging [Member] \| Foreign Exchange Forward [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value	[3]	0.1	9.6
Level 2 [Member] \| Prepaid expenses and other current assets [Member] \| Not Designated as Hedging Instrument [Member] \| Foreign Exchange Forward [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value	[3]	1	0.3
Level 2 [Member] \| Accounts Payable and Accrued Liabilities [Member] \| Cash Flow Hedging [Member] \| Precious Metal Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value	[4]	1.9	5.4
Level 2 [Member] \| Accounts Payable and Accrued Liabilities [Member] \| Cash Flow Hedging [Member] \| Precious metal collars [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value	[4]		0.3
Level 2 [Member] \| Accounts Payable and Accrued Liabilities [Member] \| Cash Flow Hedging [Member] \| Foreign Exchange Forward [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value	[4]	4.8	0.6
Level 2 [Member] \| Accounts Payable and Accrued Liabilities [Member] \| Cash Flow Hedging [Member] \| Currency Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value	[4]	20.2	0.4
Level 2 [Member] \| Accounts Payable and Accrued Liabilities [Member] \| Not Designated as Hedging Instrument [Member] \| Foreign Exchange Forward [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value	[4]	1.4	2.2
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total financial assets, Fair Value		0	0
Total financial liabilities, Fair Value		0	0
Level 3 [Member] \| Other assets, net [Member] \| Marketable securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Assets, Fair Value	[1]	0	0
Level 3 [Member] \| Short-term Investments [Member] \| Bank Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial Assets, Fair Value	[2]	0	0
Level 3 [Member] \| Prepaid expenses and other current assets [Member] \| Cash Flow Hedging [Member] \| Precious Metal Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value	[3]	0	0
Level 3 [Member] \| Prepaid expenses and other current assets [Member] \| Cash Flow Hedging [Member] \| Precious metal collars [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value	[3]		0
Level 3 [Member] \| Prepaid expenses and other current assets [Member] \| Cash Flow Hedging [Member] \| Foreign Exchange Forward [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value	[3]	0	0
Level 3 [Member] \| Prepaid expenses and other current assets [Member] \| Not Designated as Hedging Instrument [Member] \| Foreign Exchange Forward [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, Fair Value	[3]	0	0
Level 3 [Member] \| Accounts Payable and Accrued Liabilities [Member] \| Cash Flow Hedging [Member] \| Precious Metal Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value	[4]	0	0
Level 3 [Member] \| Accounts Payable and Accrued Liabilities [Member] \| Cash Flow Hedging [Member] \| Precious metal collars [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value	[4]		0
Level 3 [Member] \| Accounts Payable and Accrued Liabilities [Member] \| Cash Flow Hedging [Member] \| Foreign Exchange Forward [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value	[4]	0	0
Level 3 [Member] \| Accounts Payable and Accrued Liabilities [Member] \| Cash Flow Hedging [Member] \| Currency Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value	[4]	0	0
Level 3 [Member] \| Accounts Payable and Accrued Liabilities [Member] \| Not Designated as Hedging Instrument [Member] \| Foreign Exchange Forward [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value	[4]	$ 0	$ 0

[1]	Included within Other assets, net.
[2]	Included within Short-term investments.
[3]	Included within Prepaid expenses and other current assets or Other assets, net based on the maturity of the contract.
[4]	Included within Accounts payable and accrued liabilities or Other long-term liabilities based on the maturity of the contract.

Fair Value of Financial Instr72

Fair Value of Financial Instruments - Additional Information (Details) - USD ($) $ in Millions	Jan. 31, 2018	Jan. 31, 2017
Fair Value Disclosures [Abstract]
The total carrying value of short-term borrowings and long-term debt	$ 1,000	$ 1,100
Total fair value of short-term borrowings and long-term debt	$ 1,000	$ 1,100

Commitments and Contingencies L

Commitments and Contingencies Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2008
Sale Leaseback Transaction [Line Items]
Deferred gains on sale-leasebacks	$ 40.5	$ 45.9	$ 144.5
Minimum [Member]
Sale Leaseback Transaction [Line Items]
Amortization Period of Sale-Leaseback Deferred Gains	15 years
Maximum [Member]
Sale Leaseback Transaction [Line Items]
Amortization Period of Sale-Leaseback Deferred Gains	20 years

Commitments and Contingencies R

Commitments and Contingencies Rent Expenses for Operating Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Operating Leases Rent Expense Minimum Rentals Excluding Office Distribution And Manufacturing Facilities And Equipment	$ 198.7	$ 184.1	$ 172.2
Operating Leases, Rent Expense, Contingent Rentals	32.7	32.4	34.9
Operating Leases Rent Expenses Office Distribution And Manufacturing Facilities And Equipment	40	40	37
Operating Leases, Rent Expense, Net	271.4	256.5	244.1
Fees Paid To Department Store Operators	$ 118.9	$ 117.9	$ 109.4

Commitments and Contingencies M

Commitments and Contingencies Minimum Rental Payments under Non-Cancelable Operating Leases (Details) $ in Millions	Jan. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 313.6
Operating Leases, Future Minimum Payments, Due in Two Years	249.4
Operating Leases, Future Minimum Payments, Due in Three Years	209.5
Operating Leases, Future Minimum Payments, Due in Four Years	185.8
Operating Leases, Future Minimum Payments, Due in Five Years	163.6
Operating Leases, Future Minimum Payments, Due Thereafter	$ 563.8

Commitments and Contingencies D

Commitments and Contingencies Diamond Sourcing Activities (Details) $ in Millions	12 Months Ended
	Jan. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
Diamond Purchase Commitments Amount Committed	$ 45

Commitments and Contingencies C

Commitments and Contingencies Contractual Cash Obligations and Contingent Funding Commitments (Details) $ in Millions	12 Months Ended
	Jan. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
Inventory Purchase Commitments Including Diamond Purchase Commitments Amount Committed	$ 268.4
Diamond Purchase Commitments Amount Committed	45
Other Contractual Obligations	$ 86.6

Commitments and Contingencies -

Commitments and Contingencies - Litigation (Details) SFr in Millions, $ in Millions	12 Months Ended
	Jan. 31, 2018EUR (€)	Jan. 31, 2014USD ($)	Jan. 31, 2014CHF (SFr)	Jan. 31, 2018USD ($)	Jan. 31, 2018CHF (SFr)
Loss Contingencies [Line Items]
Litigation Settlement, Amount Awarded to Other Party \| €	€ 6,340
Loss Contingency, Damages Paid, Value \| SFr			SFr 402.7
Arbitration award expense \| $		$ 480.2
Swatch Parties [Member]
Loss Contingencies [Line Items]
Minimum Damage Claim Sought By Third Party				$ 78	SFr 73
Maximum Damage Claim Sought By Third Party				4,100	3,800
Tiffany Parties [Member]
Loss Contingencies [Line Items]
Minimum Damage Claim Sought				129	120
Maximum Damage Claim Sought				$ 578	SFr 540

Commitments and Contingencies G

Commitments and Contingencies Gain Contingency (Details) - Positive Outcome of Litigation [Member] $ in Thousands	Jan. 31, 2018USD ($)
September 29, 2016 [Member] \| Trademark Infringement Award, Profits [Member]
Gain Contingencies [Line Items]
Gain Contingency, Unrecorded Amount	$ 5,500
October 5, 2016 [Member]
Gain Contingencies [Line Items]
Gain Contingency, Unrecorded Amount	13,750
October 5, 2016 [Member] \| Trademark Infringement Award, Punitive Damages [Member]
Gain Contingencies [Line Items]
Gain Contingency, Unrecorded Amount	8,250
August 14, 2017 [Member] \| Trademark Infringement Award, Profits [Member]
Gain Contingencies [Line Items]
Gain Contingency, Unrecorded Amount	11,100
August 14, 2017 [Member] \| Trademark Infringement Award, Punitive Damages [Member]
Gain Contingencies [Line Items]
Gain Contingency, Unrecorded Amount	8,250
August 24, 2017 [Member]
Gain Contingencies [Line Items]
Gain Contingency, Unrecorded Amount	$ 21,000

Commitments and Contingencies E

Commitments and Contingencies Environmental Matter (Details) $ in Millions	12 Months Ended
	Jan. 31, 2018USD ($)
Environmental Matter Disclosure [Line Items]
Estimated Remediation Costs CPG Preferred Approach Low Estimate	$ 483
Identified Remediation Plan, Cost Estimated by the EPA	1,380
RoD Design Phase, Settlement Amount by Third Party	$ 165

Commitments and Contingencies O

Commitments and Contingencies Other (Details) $ in Millions	3 Months Ended
Commitments and Contingencies Other (Details) $ in Millions	Jan. 31, 2017USD ($)
Commitments and Contingencies Disclosure [Abstract]
Expense Incurred For Cost Reduction Initiatives	$ 8.8

Related Parties (Details)

Related Parties (Details) $ in Millions	12 Months Ended
Related Parties (Details) $ in Millions	Jan. 31, 2016USD ($)
Related Party Transactions [Abstract]
Related Party Transaction, Expenses from Transactions with Related Party	$ 0.7

Stockholders' Equity - Accumula

Stockholders' Equity - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	Jan. 31, 2018	Jan. 31, 2017
Accumulated other comprehensive (loss) earnings, net of tax:
Foreign currency translation adjustments	$ (48)	$ (143.7)
Unrealized (loss) gain on marketable securities	(1.8)	0.8
Deferred hedging loss	(22.9)	(16.1)
Net unrealized loss on benefit plans	(65.3)	(97.2)
Accumulated other comprehensive (loss) gain, net of tax	$ (138)	$ (256.2)

Stockholders' Equity - Addition

Stockholders' Equity - Additions to and Reclassifications out of Accumulated Other Comprehensive (Loss) Earnings (Details) - USD ($) $ in Millions		12 Months Ended
		Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Equity [Abstract]
Foreign currency translation adjustments		$ 97.9	$ 8.3	$ (59.9)
Income tax (expense) benefit		(2.2)	(16.7)	0.9
Foreign currency translation adjustments		95.7	(8.4)	(59)
Unrealized gain (loss) on marketable securities		0.2	2.7	(4.1)
Reclassification for gain included in net earnings a	[1]	(3.5)	0	(0.4)
Income tax benefit (expense)		0.7	(0.9)	1.6
Unrealized (loss) gain on marketable securities		(2.6)	1.8	(2.9)
Unrealized (loss) gain on hedging instruments		(21)	12.1	(22.2)
Reclassification adjustment for loss (gain) included in net earnings b	[2]	13	4.9	(11.7)
Income tax benefit (expense)		1.2	(6.3)	12.5
Unrealized (loss) gain on hedging instruments		(6.8)	10.7	(21.4)
Net actuarial gain		30.6	14.1	122.5
Amortization of net loss included in net earnings	[3]	13.3	14.7	30.4
Amortization of prior service credit included in net earnings	[3]	(0.5)	(0.7)	(0.6)
Income tax expense		(11.5)	(10.3)	(56.6)
Unrealized gain on benefit plans		31.9	17.8	95.7
Other comprehensive earnings, net of tax		$ 118.2	$ 21.9	$ 12.4

[1]	These gains are reclassified into Other (income) expense, net.
[2]	These losses (gains) are reclassified into Interest expense and financing costs and Cost of sales (see "Note H. Hedging Instruments" for additional details).
[3]	These losses (gains) are included in the computation of net periodic pension costs (see "Note N. Employee Benefit Plans" for additional details).

Stockholders' Equity Stock Repu

Stockholders' Equity Stock Repurchase Program (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 22, 2016	Mar. 21, 2014
2014 Program [Member]
Share Repurchase [Line Items]
Stock Repurchase Program, Authorized Amount			$ 300
2016 Program [Member]
Share Repurchase [Line Items]
Stock Repurchase Program, Authorized Amount		$ 500
Stock Repurchase Program Expiration Date	Jan. 31, 2019
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 211.2

Stockholders' Equity Share Repu

Stockholders' Equity Share Repurchase Table (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Equity [Abstract]
Cost of repurchases	$ 99.2	$ 183.6	$ 220.4
Purchase and retirement of Common Stock, Shares	1	2.8	2.8
Average cost per share	$ 94.86	$ 65.24	$ 78.40

Stockholders' Equity Dividends

Stockholders' Equity Dividends Declared (Details) - $ / shares	3 Months Ended	12 Months Ended
	Apr. 30, 2018	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016	Feb. 15, 2018
Dividends Payable [Line Items]
Common Stock, Dividends, Per Share, Declared		$ 1.95	$ 1.75	$ 1.58
Subsequent Event [Member]
Dividends Payable [Line Items]
Dividends Payable, Date of Record	Mar. 20, 2018
Dividends Payable, Date Declared	Feb. 15, 2018
Dividends Payable, Date to be Paid	Apr. 10, 2018
Dividends Payable, Amount Per Share					$ 0.50

Stock Compensation Plans (Detai

Stock Compensation Plans (Details) - USD ($) $ / shares in Units, shares in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
MaximumValuePerNonemployeeDirectorInStockOptionOrAwardPerYear	$ 750,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 69,400,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 18.33	$ 14.36	$ 14.42
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 31,200,000	$ 4,500,000	$ 2,400,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	2 years 8 months
Allocated Share-based Compensation Expense	$ 28,000,000	24,300,000	24,500,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	$ 8,500,000	7,700,000	7,900,000
Director Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	1
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date	10 years
Performance Based Restricted Stock units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$ 3,400,000	6,300,000	4,100,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$ 22,200,000	$ 13,600,000	$ 18,000,000
Employee Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	8.7
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	25.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
Director [Member] \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	1 year

Stock Compensation Plans Valuat

Stock Compensation Plans Valuation Assumptions (Details)	12 Months Ended
Stock Compensation Plans Valuation Assumptions (Details)	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Dividend yield	1.80%	2.00%	1.90%
Expected Volatility	22.00%	23.80%	28.10%
Risk Free Interest Rate	2.20%	1.80%	1.50%
Expected Term in years	5 years	5 years	5 years

Stock Compensation Plans Option

Stock Compensation Plans Option Activity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Outstanding, Shares, beginning of period	2.3
Granted, Shares	0.7
Exercised, Shares	(0.8)
Forfeited/canceled, Shares	(0.5)
Outstanding, Shares, end of period	1.7	2.3
Exercisable, Shares	0.7
Outstanding, Weighted Average Exercise Price, beginning of period	$ 70.72
Granted, Weighted Average Exercise Price	100.25
Exercised, Weighted Average Exercise Price	65.72
Forfeited/canceled, Weighted Average Exercise Price	74.15
Outstanding, Weighted Average Exercise Price, end of period	84.25	$ 70.72
Exercisable, Weighted Average Exercise Price	$ 73.46
Outstanding, Weighted Average Remaining Contractual Term	7 years 10 months 12 days	7 years 6 months
Exercisable, Weighted Average Remaining Contractual Term	5 years 11 months 25 days
Outstanding, Intrinsic Value, beginning of period	$ 23.8
Outstanding, Intrinsic Value, end of period	41.1	$ 23.8
Exercisable, Intrinsic Value	$ 23.6

Stock Compensation Plans RSU an

Stock Compensation Plans RSU and PSU activity (Details) - $ / shares shares in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested, Shares, beginning balance	0.6
Granted, Shares	0.3
Vested, Shares	(0.2)
Forfeitures, Shares	(0.1)
Non-vested, Shares, ending balance	0.6	0.6
Non-vested, Weighted Average Grant Date Fair Value, beginning of period	$ 73.33
Granted, Weighted Average Grant Date Fair Value	91.69	$ 67.46	$ 80.44
Vested, Weighted Average Grant Date Fair Value	92.95
Forfeitures, Weighted Average Grant Date Fair Value	78.58
Non-vested, Weighted Average Grant Date Fair Value, end of period	$ 81.12	$ 73.33
Performance Based Restricted Stock units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested, Shares, beginning balance	0.7
Granted, Shares	0.2
Vested, Shares	0
Forfeitures, Shares	(0.4)
Non-vested, Shares, ending balance	0.5	0.7
Non-vested, Weighted Average Grant Date Fair Value, beginning of period	$ 73.52
Granted, Weighted Average Grant Date Fair Value	108.99	$ 79.23	$ 58.09
Vested, Weighted Average Grant Date Fair Value	83.45
Forfeitures, Weighted Average Grant Date Fair Value	72.49
Non-vested, Weighted Average Grant Date Fair Value, end of period	$ 84.85	$ 73.52

Employee Benefit Plans Pension

Employee Benefit Plans Pension and Other Postretirement Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Health Care Cost Trend Rate Assumed for Next Fiscal Year	7.00%
Liability, Defined Benefit Plan, Current	$ 8.6	$ 7.5
Pension/postretirement benefit obligations	$ 287.4	318.6
Health Care Cost Trend Rate	4.75%
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Years of Service	10 years
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer Contribution	$ 1.3	1.3
Qualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Average Compensation Term Of Employment	five years of the last 10 years
Years of Service	10 years
Employer Contribution	$ 15	$ 120
Qualified Plan [Member] \| Equity Securities, Investment Summary [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	50.00%
Qualified Plan [Member] \| Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	35.00%
Qualified Plan [Member] \| Other Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	15.00%

Employee Benefit Plans Reconcil

Employee Benefit Plans Reconcilation of Benefit Obligations, Plan Assets and Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets at beginning of the year	$ 530.1
Fair Value of Plan Assets at end of year	578.1	$ 530.1
Pension Benefits [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation at beginning of year	783.7	742.6
Service cost	17.3	17.4	$ 22.6
Interest cost	32	31.6	30.6
Participants' contributions	0	0
MMA retiree drug subsidy	0	0
Actuarial loss (gain)	21.1	15.9
Benefits paid	59.4	24.3
Translation	0.9	0.5
Benefit Obligation at end of year	795.6	783.7	742.6
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets at beginning of the year	530.1	385.8
Actual Return on Plan Assets	86.1	42.9
Employer Contribution	21.3	125.7
Participants' contributions	0	0
MMA retiree drug subsidy	0	0
Benefits paid	59.4	24.3
Fair Value of Plan Assets at end of year	578.1	530.1	385.8
Funded Status	(217.5)	(253.6)
Other Postretirement Benefits [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation at beginning of year	72.5	78.4
Service cost	2.8	2.8	4.2
Interest cost	3	3.1	3.2
Participants' contributions	1	1.2
MMA retiree drug subsidy	0.2	0
Actuarial loss (gain)	1.5	(10.5)
Benefits paid	2.5	2.5
Translation	0	0
Benefit Obligation at end of year	78.5	72.5	78.4
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets at beginning of the year	0	0
Actual Return on Plan Assets	0	0
Employer Contribution	1.3	1.3
Participants' contributions	1	1.2
MMA retiree drug subsidy	0.2	0
Benefits paid	2.5	2.5
Fair Value of Plan Assets at end of year	0	0	$ 0
Funded Status	$ (78.5)	$ (72.5)

Employee Benefit Plans Projecte

Employee Benefit Plans Projected Benefit Obligation, Plan Assets and Accumulated Benefit Obligation (Details) - USD ($) $ in Millions	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 578.1	$ 530.1
Qualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected Benefit Obligation	662	661.5
Fair Value of Plan Assets	578.1	530.1
Funded Status	(83.9)	(131.4)
Accumulated Benefit Obligation	600.2	599
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected Benefit Obligation	112.6	103.6
Fair Value of Plan Assets	0	0
Funded Status	(112.6)	(103.6)
Accumulated Benefit Obligation	98.5	90.9
Other Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected Benefit Obligation	21	18.6
Fair Value of Plan Assets	0	0
Funded Status	(21)	(18.6)
Accumulated Benefit Obligation	19.3	16.9
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected Benefit Obligation	795.6	783.7	$ 742.6
Fair Value of Plan Assets	578.1	530.1	$ 385.8
Funded Status	(217.5)	(253.6)
Accumulated Benefit Obligation	$ 718	$ 706.8

Employee Benefit Plans Amounts

Employee Benefit Plans Amounts Recognized in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	Jan. 31, 2018	Jan. 31, 2017
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	$ 116.5	$ 161.8
Prior service cost (credit)	0.6	0.8
Total before tax	117.1	162.6
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	1.3	(0.1)
Prior service cost (credit)	(1.7)	(2.4)
Total before tax	$ (0.4)	$ (2.5)

Employee Benefit Plans Estimate

Employee Benefit Plans Estimated Pre-Tax Amount to be Amortized from Accumulated Other Comprehensive Loss into Net Periodic Benefit Cost Over Next 12 Months (Details) $ in Millions	Jan. 31, 2018USD ($)
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ 13.2
Prior service cost (credit)	0.1
Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year	13.3
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	0.1
Prior service cost (credit)	(0.7)
Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year	$ (0.6)

Employee Benefit Plans - Compon

Employee Benefit Plans - Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Earnings (Details) - USD ($) $ in Millions		12 Months Ended
		Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Net actuarial (gain) loss		$ (30.6)	$ (14.1)	$ (122.5)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	[1]	(13.3)	(14.7)	(30.4)
Recognized Prior Service (Cost) Credit	[1]	(0.5)	(0.7)	(0.6)
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		17.3	17.4	22.6
Interest cost		32	31.6	30.6
Expected return on plan assets		(32.9)	(23.5)	(24.7)
Curtailments		0	0	0.2
Amortization of prior service cost		0.2	0	0
Amortization of net loss		13.2	14.7	28.9
Net periodic benefit cost		29.8	40.2	57.6
Net actuarial (gain) loss		(32.1)	(3.6)	(102.1)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax		(13.2)	(14.7)	(28.9)
Recognized Prior Service (Cost) Credit		(0.2)	0	(0.1)
Total recognized in other comprehensive earnings		(45.5)	(18.3)	(131.1)
Total Recognized In Net Periodic Benefit Cost And Other Comprehensive Earnings		(15.7)	21.9	(73.5)
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		2.8	2.8	4.2
Interest cost		3	3.1	3.2
Expected return on plan assets		0	0	0
Curtailments		0	0	0
Amortization of prior service cost		(0.7)	(0.7)	(0.7)
Amortization of net loss		0.1	0	1.5
Net periodic benefit cost		5.2	5.2	8.2
Net actuarial (gain) loss		1.5	(10.5)	(20.4)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax		(0.1)	0	(1.5)
Recognized Prior Service (Cost) Credit		0.7	0.7	0.7
Total recognized in other comprehensive earnings		2.1	(9.8)	(21.2)
Total Recognized In Net Periodic Benefit Cost And Other Comprehensive Earnings		$ 7.3	$ (4.6)	$ (13)

[1]	These losses (gains) are included in the computation of net periodic pension costs (see "Note N. Employee Benefit Plans" for additional details).

Employee Benefit Plans Benefit

Employee Benefit Plans Benefit Obligations Weighted Average Assumptions (Details)	Jan. 31, 2018	Jan. 31, 2017
Qualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.00%	4.25%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	3.00%	3.00%
Other Pension, Postretirement and Supplemental Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	4.25%	4.25%
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.75%	4.25%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	6.50%	6.50%
Other Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	0.83%	0.81%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	1.13%	1.12%
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.00%	4.25%

Employee Benefit Plans Net Peri

Employee Benefit Plans Net Periodic Benefit Costs Weighted Average Assumptions (Details)	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Expected Return on Plan Assets	7.00%	7.00%	7.50%
Qualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount Rate	4.25%	4.50%	3.75%
Rate of Increase in compensation	3.00%	3.00%	2.75%
Other Pension, Postretirement and Supplemental Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Rate of Increase in compensation	4.25%	4.25%	4.25%
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount Rate	4.25%	4.25%	3.75%
Rate of Increase in compensation	6.50%	6.50%	7.25%
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount Rate	4.25%	4.50%	3.50%
Other Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount Rate	1.49%	1.40%	1.71%
Rate of Increase in compensation	1.38%	1.38%	1.56%

Employee Benefit Plans Fair Val

Employee Benefit Plans Fair Value of Plan Assets (Details) - USD ($) $ in Millions		Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		$ 578.1	$ 530.1
Fair value of plan assets excluding investments at NAV practical expedient		365.1	297.8
Investments at NAV practical expedient	[1]	213	232.3
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		248.2	213.6
Fair value of plan assets excluding investments at NAV practical expedient		248.2	213.6
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		116.9	84.2
Fair value of plan assets excluding investments at NAV practical expedient		116.9	84.2
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Fair value of plan assets excluding investments at NAV practical expedient		0	0
Equity Securities, Investment Summary [Member] \| U.S. equity securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		74.3	56.2
Equity Securities, Investment Summary [Member] \| U.S. equity securities [Member] \| Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		74.3	56.2
Equity Securities, Investment Summary [Member] \| U.S. equity securities [Member] \| Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Equity Securities, Investment Summary [Member] \| U.S. equity securities [Member] \| Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Equity Securities, Investment Summary [Member] \| Mutual funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		44.7	35.1
Equity Securities, Investment Summary [Member] \| Mutual funds [Member] \| Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		44.7	35.1
Equity Securities, Investment Summary [Member] \| Mutual funds [Member] \| Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Equity Securities, Investment Summary [Member] \| Mutual funds [Member] \| Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Fixed Income Securities [Member] \| Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		79	78.2
Fixed Income Securities [Member] \| Government Bonds [Member] \| Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		77.3	77.8
Fixed Income Securities [Member] \| Government Bonds [Member] \| Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		1.7	0.4
Fixed Income Securities [Member] \| Government Bonds [Member] \| Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Fixed Income Securities [Member] \| Corporate Bond Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		115.2	83.8
Fixed Income Securities [Member] \| Corporate Bond Securities [Member] \| Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Fixed Income Securities [Member] \| Corporate Bond Securities [Member] \| Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		115.2	83.8
Fixed Income Securities [Member] \| Corporate Bond Securities [Member] \| Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Other Investments [Member] \| Mutual funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		49.6	36.7
Other Investments [Member] \| Mutual funds [Member] \| Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		49.6	36.7
Other Investments [Member] \| Mutual funds [Member] \| Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Other Investments [Member] \| Mutual funds [Member] \| Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Other Investments [Member] \| Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		2.3	7.8
Other Investments [Member] \| Cash and Cash Equivalents [Member] \| Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		2.3	7.8
Other Investments [Member] \| Cash and Cash Equivalents [Member] \| Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Other Investments [Member] \| Cash and Cash Equivalents [Member] \| Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		0	0
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		$ 578.1	$ 530.1	$ 385.8

[1]	In accordance with ASC 820-10, certain investments that are measured at fair value using the net asset value ("NAV") per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the Qualified Plan's fair value of plan assets at the end of each respective year.

Employee Benefit Plans Future B

Employee Benefit Plans Future Benefit Payments (Details) $ in Millions	Jan. 31, 2018USD ($)
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2,019	$ 27.1
2,020	27.4
2,021	28.5
2,022	29.8
2,023	30.6
2024-2028	175.1
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2,019	1.9
2,020	2
2,021	2.1
2,022	2.2
2,023	2.4
2024-2028	$ 14.8

Employee Benefit Plans Defined

Employee Benefit Plans Defined Contribution Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Defined Contribution Plan Disclosure [Line Items]
Deferred Compensation Arrangement with Individual, Recorded Liability	$ 28.9	$ 26.5
Profit-sharing feature [Member]
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan, Cost	3.9	2.3	$ 0
Retirement Savings Feature [Member]
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan, Cost	$ 8.2	7.5	7.3
Employees contribution percentage	50.00%
Percentage Of Matching Contribution Made By Company Of First Six Percentage Of Participating Employees Contribution	50.00%
Percentage Of Participating Employees Contribution Matched By Employer	3.00%
Employee Profit Sharing and Retirement Savings Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Percent Investment In Company Stock	20.00%
DCRB Feature of EPSRS Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan, Cost	$ 5.2	$ 4.6	$ 3.2

Income Taxes Tax Cuts and Jobs

Income Taxes Tax Cuts and Jobs Act of 2017 (Details) $ in Millions	3 Months Ended
	Jan. 31, 2018USD ($)
Income Tax Disclosure [Abstract]
Tax Cuts and Jobs Act of 2017 Estimated Net Tax Expense	$ 146.2
Tax Cuts and Jobs Act of 2017, Measurement Period Adjustment, Income Tax Expense (Benefit)	94.8
Tax Cuts and Jobs Act of 2017 Transition Tax	56
Tax Cuts and Jobs Act of 2017 Statutory Rate Change	$ 4.6

Income Taxes Earnings from Oper

Income Taxes Earnings from Operations Before Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Income Tax Disclosure [Abstract]
United States	$ 597.1	$ 478.2	$ 502.5
Foreign	163.4	198.4	207.4
Earnings from operations before income taxes	$ 760.5	$ 676.6	$ 709.9

Income Taxes Components of Inco

Income Taxes Components of Income Tax Provision (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Income Tax Disclosure [Abstract]
Current Federal Tax Expense (Benefit)	$ 227.9	$ 125.5	$ 175.8
Current State and Local Tax Expense (Benefit)	16.7	15.4	22.3
Current Foreign Tax Expense (Benefit)	49	43.5	49.8
Current Income Tax Expense (Benefit)	293.6	184.4	247.9
Deferred Federal Income Tax Expense (Benefit)	94.1	36.7	(15.4)
Deferred State and Local Income Tax Expense (Benefit)	1.1	7.1	3.9
Deferred Foreign Income Tax Expense (Benefit)	1.6	2.3	9.6
Deferred Income Tax Expense (Benefit)	96.8	46.1	(1.9)
Income Tax Expense (Benefit)	$ 390.4	$ 230.5	$ 246

Income Taxes Reconciliations of

Income Taxes Reconciliations of Provision for Income Taxes at Statutory Federal Income Tax Rate (Details)	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Income Tax Disclosure [Abstract]
Statutory Federal Income Tax Rate	33.80%	35.00%	35.00%
State income Taxes, net of Federal benefit	1.50%	2.20%	2.40%
Foreign Losses With No Tax Benefit	0.20%	0.20%	0.00%
Undistributed Foreign Earnings	(1.40%)	(2.30%)	(2.50%)
Net change in uncertain tax positions	0.20%	(0.70%)	0.50%
Domestic manufacturing deduction	(1.80%)	(0.90%)	(1.30%)
2017 Tax Act	19.80%	0.00%	0.00%
Other	(1.00%)	0.60%	0.60%
Effective Income Tax Rate Reconciliation, Percent	51.30%	34.10%	34.70%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Income Tax Examination [Line Items]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 1.1	$ 1	$ 9.1
Income Tax Examination, Penalties and Interest Expense	2	0	1.7
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	10.3	8.3
Unrecognized Tax Benefits	10.1	$ 7.2	$ 14	$ 12.1
Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Operating Loss Carryforwards	$ 32.7
Minimum [Member] \| State and Local Jurisdiction [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,006
Minimum [Member] \| Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Operating Loss Carryforwards, Expiration Date	Jun. 19, 2019
Open Tax Year	2,006
Minimum [Member] \| Internal Revenue Service [Member]
Income Tax Examination [Line Items]
Open Tax Year	2,010
Minimum [Member] \| New York City [Member]
Income Tax Examination [Line Items]
Income tax examination, tax years	2,011
Minimum [Member] \| New York State Division of Taxation and Finance [Member]
Income Tax Examination [Line Items]
Income tax examination, tax years	2,012
Maximum [Member] \| Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Operating Loss Carryforwards, Expiration Date	Jul. 31, 2025
Maximum [Member] \| New York City [Member]
Income Tax Examination [Line Items]
Income tax examination, tax years	2,013
Maximum [Member] \| New York State Division of Taxation and Finance [Member]
Income Tax Examination [Line Items]
Income tax examination, tax years	2,014

Income Taxes Deferred Tax Asset

Income Taxes Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Millions	Jan. 31, 2018	Jan. 31, 2017
Income Tax Disclosure [Abstract]
Pension/postretirement benefits	$ 81.2	$ 124.7
Accrued expenses	22.9	36.1
Share-based Compensation	7.2	17.3
Depreciation	0.6	6.5
Amortization	6.4	10.8
Foreign and state net operating losses	9.2	25.5
Sale Leaseback	17.2	25.8
Inventory	35.8	57.6
Financial hedging instruments	8.4	11.9
Unearned Income	7.7	10.6
Other	25.1	23
Deferred Tax Assets, Gross	221.7	349.8
Valuation Allowance	(9.6)	(24.1)
Deferred Tax Assets, Net of Valuation Allowance	212.1	325.7
Foreign Tax Credit	(24.9)	(25.8)
Deferred Tax Assets, Net	$ 187.2	$ 299.9

Income Taxes Reconciliation of

Income Taxes Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits at beginning of period	$ 7.2	$ 14	$ 12.1
Gross increases - tax positions in prior period	3.2	0.9	1
Gross decreases - tax positions in prior period	(0.9)	(5)	(0.4)
Gross increases - tax positions in current period	0.6	0.3	1.4
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	0	(3)	0
Lapse of Statute of Limitations	0	0	(0.1)
Unrecognized Tax Benefits at end of period	$ 10.1	$ 7.2	$ 14

Segment Information - Company's

Segment Information - Company's Segments Information (Details) - USD ($) $ in Millions	3 Months Ended										12 Months Ended
	Jan. 31, 2018	[1]	Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	[2]	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Net sales:
Net sales	$ 1,334.3		$ 976.2	$ 959.7	$ 899.6	$ 1,229.6		$ 949.3	$ 931.6	$ 891.3	$ 4,169.8	$ 4,001.8	$ 4,104.9
Earnings (losses) from operations:
Segment Reporting Earnings Losses From Continuing Operations Before Unallocated Corporate Expenses Interest											976.3	921.1	958.9
Americas [Member]
Net sales:
Net sales											1,870.9	1,841.9	1,947
Earnings (losses) from operations:
Segment Reporting Earnings Losses From Continuing Operations Before Unallocated Corporate Expenses Interest											390.3	373	390.8
Asia-Pacific [Member]
Net sales:
Net sales											1,095	999.1	1,003.1
Earnings (losses) from operations:
Segment Reporting Earnings Losses From Continuing Operations Before Unallocated Corporate Expenses Interest											286.1	256	264.4
Japan [Member]
Net sales:
Net sales											596.3	604.4	541.3
Earnings (losses) from operations:
Segment Reporting Earnings Losses From Continuing Operations Before Unallocated Corporate Expenses Interest											207.3	204.6	199.9
Europe [Member]
Net sales:
Net sales											482.9	457.6	505.7
Earnings (losses) from operations:
Segment Reporting Earnings Losses From Continuing Operations Before Unallocated Corporate Expenses Interest											86.3	81.6	97.4
Reportable Geographical Components [Member]
Net sales:
Net sales											4,045.1	3,903	3,997.1
Earnings (losses) from operations:
Segment Reporting Earnings Losses From Continuing Operations Before Unallocated Corporate Expenses Interest											970	915.2	952.5
Other [Member]
Net sales:
Net sales											124.7	98.8	107.8
Earnings (losses) from operations:
Segment Reporting Earnings Losses From Continuing Operations Before Unallocated Corporate Expenses Interest											$ 6.3	$ 5.9	$ 6.4

[1]	For the quarter ended January 31, 2018, includes net tax expense of $146.2 million, or $1.17 per diluted share, related to the estimated impact of the 2017 Tax Act (see "Note O. Income Taxes").
[2]	On a pre-tax basis, includes charges for the quarter ended January 31, 2017 of: i.$25.4 million, which reduced net earnings per diluted share by $0.13, associated with an impairment charge related to software costs capitalized in connection with the development of a new finished goods inventory management and merchandising information system (see "Note B. Summary of Significant Accounting Policies" and "Note E. Property, Plant and Equipment"); andii.$12.6 million, which reduced net earnings per diluted share by $0.06, associated with impairment charges related to financing arrangements with diamond mining and exploration companies (see "Note B. Summary of Significant Accounting Policies").

Segment Information - Reconcili

Segment Information - Reconciliation of Segments' Earnings from Operations to Company's Consolidated Earnings from Operations Before Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Segment Reporting [Abstract]
Earnings from operations for segments	$ 976.3	$ 921.1	$ 958.9
Unallocated corporate expenses	(181.8)	(161.9)	(152.1)
Interest expense, financing costs and other (income) expense, net	(34)	(44.6)	(50.2)
Other operating expense	0	(38)	(46.7)
Earnings from operations before income taxes	$ 760.5	$ 676.6	$ 709.9

Segment Information Sales to Un

Segment Information Sales to Unaffiliated Customers and Long-Lived Assets by Geographic Areas (Details) - USD ($) $ in Millions	3 Months Ended										12 Months Ended
	Jan. 31, 2018		Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017		Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 1,334.3	[1]	$ 976.2	$ 959.7	$ 899.6	$ 1,229.6	[2]	$ 949.3	$ 931.6	$ 891.3	$ 4,169.8	$ 4,001.8	$ 4,104.9
Long-Lived Assets	1,047.3					982					1,047.3	982	984.2
UNITED STATES [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales											1,739	1,691.4	1,795.5
Long-Lived Assets	724.5					691.3					724.5	691.3	706.9
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales											596.3	604.4	541.3
Long-Lived Assets	21.4					21.7					21.4	21.7	20.6
Other Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales											1,834.5	1,706	1,768.1
Long-Lived Assets	$ 301.4					$ 269					$ 301.4	$ 269	$ 256.7

[1]	For the quarter ended January 31, 2018, includes net tax expense of $146.2 million, or $1.17 per diluted share, related to the estimated impact of the 2017 Tax Act (see "Note O. Income Taxes").
[2]	On a pre-tax basis, includes charges for the quarter ended January 31, 2017 of: i.$25.4 million, which reduced net earnings per diluted share by $0.13, associated with an impairment charge related to software costs capitalized in connection with the development of a new finished goods inventory management and merchandising information system (see "Note B. Summary of Significant Accounting Policies" and "Note E. Property, Plant and Equipment"); andii.$12.6 million, which reduced net earnings per diluted share by $0.06, associated with impairment charges related to financing arrangements with diamond mining and exploration companies (see "Note B. Summary of Significant Accounting Policies").

Segment Information Revenue fro

Segment Information Revenue from External Customers by Products and Services (Details) - USD ($) $ in Millions	3 Months Ended										12 Months Ended
	Jan. 31, 2018	[1]	Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	[2]	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Revenue from External Customer [Line Items]
Net sales	$ 1,334.3		$ 976.2	$ 959.7	$ 899.6	$ 1,229.6		$ 949.3	$ 931.6	$ 891.3	$ 4,169.8	$ 4,001.8	$ 4,104.9
Jewelry collections [Member]
Revenue from External Customer [Line Items]
Net sales											2,193.2	2,043.9	2,129.2
Engagement jewelry [Member]
Revenue from External Customer [Line Items]
Net sales											1,065.4	1,122	1,142.2
Designer jewelry [Member]
Revenue from External Customer [Line Items]
Net sales											551.2	529.1	526.4
Other products/services [Member]
Revenue from External Customer [Line Items]
Net sales											$ 360	$ 306.8	$ 307.1

[1]	For the quarter ended January 31, 2018, includes net tax expense of $146.2 million, or $1.17 per diluted share, related to the estimated impact of the 2017 Tax Act (see "Note O. Income Taxes").
[2]	On a pre-tax basis, includes charges for the quarter ended January 31, 2017 of: i.$25.4 million, which reduced net earnings per diluted share by $0.13, associated with an impairment charge related to software costs capitalized in connection with the development of a new finished goods inventory management and merchandising information system (see "Note B. Summary of Significant Accounting Policies" and "Note E. Property, Plant and Equipment"); andii.$12.6 million, which reduced net earnings per diluted share by $0.06, associated with impairment charges related to financing arrangements with diamond mining and exploration companies (see "Note B. Summary of Significant Accounting Policies").

Quarterly Financial Data (Un114

Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended										12 Months Ended
	Jan. 31, 2018	[1]	Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	[2]	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 1,334.3		$ 976.2	$ 959.7	$ 899.6	$ 1,229.6		$ 949.3	$ 931.6	$ 891.3	$ 4,169.8	$ 4,001.8	$ 4,104.9
Gross Profit	850.6		598.4	598.2	557.6	788.2		579.5	577.1	545.6	2,604.7	2,490.3	2,491.3
Earnings from operations	307.2		160.3	181.3	145.6	256.5		155.2	174.9	134.6	794.5	721.2	760.1
Net earnings	$ 61.9		$ 100.2	$ 115	$ 92.9	$ 157.8		$ 95.1	$ 105.7	$ 87.5	$ 370.1	$ 446.1	$ 463.9
Basic	$ 0.50		$ 0.81	$ 0.92	$ 0.75	$ 1.27		$ 0.76	$ 0.84	$ 0.69	$ 2.97	$ 3.57	$ 3.61
Diluted	$ 0.50		$ 0.80	$ 0.92	$ 0.74	$ 1.26		$ 0.76	$ 0.84	$ 0.69	$ 2.96	$ 3.55	$ 3.59

[1]	For the quarter ended January 31, 2018, includes net tax expense of $146.2 million, or $1.17 per diluted share, related to the estimated impact of the 2017 Tax Act (see "Note O. Income Taxes").
[2]	On a pre-tax basis, includes charges for the quarter ended January 31, 2017 of: i.$25.4 million, which reduced net earnings per diluted share by $0.13, associated with an impairment charge related to software costs capitalized in connection with the development of a new finished goods inventory management and merchandising information system (see "Note B. Summary of Significant Accounting Policies" and "Note E. Property, Plant and Equipment"); andii.$12.6 million, which reduced net earnings per diluted share by $0.06, associated with impairment charges related to financing arrangements with diamond mining and exploration companies (see "Note B. Summary of Significant Accounting Policies").

Quarterly Financial Data (Un115

Quarterly Financial Data (Unaudited) Text (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Tax Cuts and Jobs Act of 2017 Estimated Net Tax Expense	$ 146.2
Tax Cuts and Jobs Act of 2017 per share impact	$ 1.17
Asset impairment charges		$ 25.4	$ 10	$ 25.4	$ 0
Asset impairment charge per share impact		$ 0.13
Loan impairment charges		$ 12.6	$ 3	$ 12.6	$ 37.9
Loan impairment charges per share impact		$ 0.06

Schedule of Valuation and Qu116

Schedule of Valuation and Qualifying Accounts and Reserves (Details) - USD ($) $ in Millions		12 Months Ended
		Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Accounts Receivable: Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance at beginning of period		$ 1.9	$ 3.2	$ 1.8
Valuation Allowances and Reserves, Charged to Cost and Expense		3.3	3.8	4.4
Valuation Allowances and Reserves, Charged to Other Accounts		0	0	0
Valuation Allowances and Reserves, Deductions	[1]	3	5.1	3
Valuation Allowances and Reserves, Balance at end of period		2.2	1.9	3.2
Accounts Receivable: Allowance for Sales Returns [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance at beginning of period		9.6	8.3	8.8
Valuation Allowances and Reserves, Charged to Cost and Expense		7.5	2.5	3.5
Valuation Allowances and Reserves, Charged to Other Accounts		0	0	0
Valuation Allowances and Reserves, Deductions	[2]	2.1	1.2	4
Valuation Allowances and Reserves, Balance at end of period		15	9.6	8.3
Allowance for inventory liquidation and obsolescence [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance at beginning of period		65.4	59.2	63.2
Valuation Allowances and Reserves, Charged to Cost and Expense		28.9	19.2	25.4
Valuation Allowances and Reserves, Charged to Other Accounts		0	0	0
Valuation Allowances and Reserves, Deductions	[3]	19.3	13	29.4
Valuation Allowances and Reserves, Balance at end of period		75	65.4	59.2
Allowance for inventory shrinkage [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance at beginning of period		1	1.2	2.2
Valuation Allowances and Reserves, Charged to Cost and Expense		1.1	0.5	0.8
Valuation Allowances and Reserves, Charged to Other Accounts		0	0	0
Valuation Allowances and Reserves, Deductions	[4]	1.4	0.7	1.8
Valuation Allowances and Reserves, Balance at end of period		0.7	1	1.2
Deferred Tax Valuation Allowance [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance at beginning of period		24.1	19.5	16.2
Valuation Allowances and Reserves, Charged to Cost and Expense		2.3	5	5.3
Valuation Allowances and Reserves, Charged to Other Accounts		0	0	0
Valuation Allowances and Reserves, Deductions	[5]	16.8	0.4	2
Valuation Allowances and Reserves, Balance at end of period		$ 9.6	$ 24.1	$ 19.5

[1]	Uncollectible accounts written off.
[2]	Adjustment related to sales returns previously provided for.
[3]	Liquidation of inventory previously written down to market.
[4]	Physical inventory losses.
[5]	Reversal of deferred tax valuation allowance and utilization of deferred tax loss carryforward.