XML 109 R90.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Earnings Per Share - Additional Information (Detail) - shares shares in Millions |  | 12 Months Ended
--- | --- | ---
Apr. 15, 2016 | Dec. 31, 2017
Restricted Stock [Member] |  |
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |
Potentially dilutive restricted share awards excluded from computation of diluted EPS |  | 2.3
Jarden Acquisition [Member] |  |
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |
Shares issuable to Dissenting Shareholders | 9.1 | 2.5

X
- Definition Dilutive securities excluded from computation of earnings per share, amount. + References No definition available. + Details
Name: | nwl_DilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix: | nwl_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Shares issuable to dissenting shareholders. + References No definition available. + Details
Name: | nwl_SharesIssuableToDissentingShareholders
Namespace Prefix: | nwl_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_EarningsPerShareDilutedLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=nwl_JardenAcquisitionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |