XML 98 R85.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Capital Stock - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Nov. 15, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jun. 11, 2018 | Jun. 10, 2018 | Oct. 17, 2016
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |
Common stock, shares authorized |  | 400,000,000 | 200,000,000 |  | 400,000,000 | 200,000,000 |
Common and Preferred Stock, Shares Authorized |  | 410,000,000 | 210,000,000 |  | 410,000,000 | 210,000,000 |
Common Stock, par value |  | $ 0.01 | $ 0.01 |  | $ 0.01 | $ 0.01 |
Preferred stock, shares authorized |  | 10,000,000 | 10,000,000 |  | 10,000,000 | 10,000,000 |
Preferred stock, par value |  | $ 0.01 | $ 0.01 |  | $ 0.01 | $ 0.01 |
Stock Repurchase Program, Additional Repurchase Authorization |  |  |  |  |  |  | $ 300,000
Common stock repurchased, total purchase price |  | $ 7,828 | $ 4,123 | $ 280,736 |  |  |
Common stock purchased through modified dutch auction tender offer - in shares | 10,617,810 |  |  |  |  |  |
Common stock purchased through modified dutch auction tender offer - price per share | $ 25.38 |  |  |  |  |  |
Common stock purchased through modified dutch auction tender offer - total purchase price in dollars | $ 269,400 |  |  |  |  |  |
Fees And Expenses Incurred Related To Modified Dutch Auction Tender Offer | $ 700 |  |  |  |  |  |
Treasury Stock, Value, Acquired, Cost Method |  | 4,771 |  | $ 277,306 |  |  |
Common stock repurchase, remaining authorized amount |  | $ 124,600 |  |  |  |  |
Treasury stock, shares |  | 64,682,900 | 64,727,152 |  |  |  |
Activity related to restricted stock units vested [Member] |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |
Treasury shares issued |  | 339,972 | 421,108 | 363,368 |  |  |
Average cost for restricted stock units |  | $ 3.12 | $ 3.15 | $ 3.15 |  |  |
Shares repurchased to satisfy employee withholding tax requirements resulting from certain restricted stock units becoming vested |  | 107,420 | 138,080 | 134,122 |  |  |
Common stock repurchased, average cost |  | $ 28.46 | $ 30.24 | $ 25.58 |  |  |
Non-tender offer repurchase [Member] |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |
Repurchases of common stock |  | 188,300 |  | 294,930 |  |  |
Common stock repurchased, total purchase price |  | $ 4,800 |  | $ 7,200 |  |  |
Treasury Stock Acquired, Average Cost Per Share |  | $ 25.31 |  | $ 24.40 |  |  |
Board of Director Members, Executive Officers, Related Family Foundations |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |
Repurchases of common stock | 3,358,572 |  |  |  |  |  |
Treasury Stock Acquired, Average Cost Per Share | $ 25.38 |  |  |  |  |  |
Treasury Stock, Value, Acquired, Cost Method | $ 85,200 |  |  |  |  |  |

X
- Definition Common Stock Purchased Through Modified Dutch Auction Tender Offer, Price Per Share + References No definition available. + Details
Name: | slgn_CommonStockPurchasedThroughModifiedDutchAuctionTenderOfferPricePerShare
Namespace Prefix: | slgn_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Common Stock Purchased Through Modified Dutch Auction Tender Offer, Shares + References No definition available. + Details
Name: | slgn_CommonStockPurchasedThroughModifiedDutchAuctionTenderOfferShares
Namespace Prefix: | slgn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Common Stock Purchased Through Modified Dutch Auction Tender Offer, Value + References No definition available. + Details
Name: | slgn_CommonStockPurchasedThroughModifiedDutchAuctionTenderOfferValue
Namespace Prefix: | slgn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Common and Preferred Stock, Shares Authorized + References No definition available. + Details
Name: | slgn_CommonandPreferredStockSharesAuthorized
Namespace Prefix: | slgn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Fees and Expenses Incurred Related to Modified Dutch Auction Tender Offer + References No definition available. + Details
Name: | slgn_FeesandExpensesIncurredRelatedtoModifiedDutchAuctionTenderOffer
Namespace Prefix: | slgn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Stock Issued, Employee Stock Purchase Plan, Average Price Per Share + References No definition available. + Details
Name: | slgn_StockIssuedEmployeeStockPurchasePlanAveragePricePerShare
Namespace Prefix: | slgn_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Stock Repurchase Program Additional Authorized Amount + References No definition available. + Details
Name: | slgn_StockRepurchaseProgramAdditionalAuthorizedAmount
Namespace Prefix: | slgn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Stock Repurchased During Period, Average Price + References No definition available. + Details
Name: | slgn_StockRepurchasedDuringPeriodAveragePrice
Namespace Prefix: | slgn_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Stockholders Equity Note [Line Items] + References No definition available. + Details
Name: | slgn_StockholdersEquityNoteLineItems
Namespace Prefix: | slgn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face amount or stated value per share of common stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsForRepurchaseOfCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_PreferredStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_PreferredStockSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer. + References No definition available. + Details
Name: | us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of treasury shares (units) reissued during the period, excluding reissuance of shares (units) held in treasury used to satisfy equity-based compensation obligations exercised by the holders of such rights. Upon reissuance of shares (units) from treasury, either the common or preferred stock (unit) reissued is outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
Name: | us-gaap_TreasuryStockAcquiredAverageCostPerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29,30) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
Name: | us-gaap_TreasuryStockShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_TreasuryStockSharesAcquired
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_TreasuryStockValueAcquiredCostMethod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | slgn_ShareRepurchaseAxis=slgn_ActivityrelatedtorestrictedstockunitsvestedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | slgn_ShareRepurchaseAxis=slgn_NonTenderOfferRepurchaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=slgn_BODMembersExecutiveOfficersRelatedFamilyFoundationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |