Debt Instrument, Interest Rate, Increase (Decrease) Due To Interest Rate Adjustment

No definition available.

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Period Type:	duration

- Definition

Expected Interest Rate Adjustment, Annualized Amount

+ References

No definition available.

+ Details

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Namespace Prefix:	nwl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Repayments Of Debt, Including Interest

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Senior Notes, Subject To Interest Rate Adjustment

+ References

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Balance Type:	na
Period Type:	instant

- 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.

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Balance Type:	na
Period Type:	duration

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Balance Type:	na
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of increase (decrease) in interest expense on long-term debt.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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Debt - Additional Information (Details) $ in Millions	1 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended
Debt - Additional Information (Details) $ in Millions	Jun. 30, 2025 USD ($)	May 31, 2025 USD ($)	Dec. 31, 2025	Sep. 30, 2025 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2025 USD ($)	Apr. 14, 2025 USD ($)	Dec. 31, 2024
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt					$ 1,235	$ 0
Senior notes
Debt Instrument [Line Items]
Senior notes subject to interest rate adjustment	$ 1,080							$ 2,310
Expected interest expense increase, annualized amount				$ 5
Senior notes \| Forecast
Debt Instrument [Line Items]
Interest rate adjustment			0.0050
Interest expense increase							$ 1
Senior notes \| Forecast \| Standard & Poor's, B+ Rating
Debt Instrument [Line Items]
Interest rate adjustment			0.0025
Senior notes \| Moody's, B1 Rating \| Forecast
Debt Instrument [Line Items]
Interest rate adjustment			0.0025
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity				1,000	1,000
Current borrowing capacity				932	932
Outstanding borrowings				190	190
Remaining borrowing capacity				707	707
Letter of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity				150	150
Outstanding borrowings				$ 35	$ 35
8.500% senior notes due 2028
Debt Instrument [Line Items]
Debt instrument, face amount		$ 1,250
Stated interest rate percentage		8.50%		8.50%	8.50%
Proceeds from issuance of long-term debt		$ 1,230
4.200% senior notes due 2026
Debt Instrument [Line Items]
Stated interest rate percentage									4.20%
Redemption price percentage	100.757%
Consideration on debt redeemed	$ 1,250
Loss on debt extinguishment	$ 13
6.375% senior notes due 2027
Debt Instrument [Line Items]
Stated interest rate percentage				6.375%	6.375%
6.625% senior notes due 2032
Debt Instrument [Line Items]
Stated interest rate percentage				6.625%	6.625%