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Earnings Per Share - Additional Information (Detail) - shares shares in Millions		9 Months Ended
	Apr. 15, 2016	Sep. 30, 2017
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

Shares issuable to dissenting shareholders.

+ References

No definition available.

+ Details

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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_BusinessAcquisitionAxis=nwl_JardenAcquisitionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: