Debt Instrument, Modification Amount

No definition available.

Name:	nvl_DebtInstrumentModificationAmount
Namespace Prefix:	nvl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Quarterly Amortization Payments, Percent

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

Carrying value as of the balance sheet date of payments made in excess of existing cash balances, which will be honored by the bank but reflected as a loan to the entity. Overdrafts generally have a very short time frame for correction or repayment and are therefore more similar to short-term bank financing than trade financing.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

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- Definition

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

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- 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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Period Type:	duration

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

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

- Definition

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

+ References

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

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Period Type:	instant

- 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.

+ References

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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.

+ References

+ Details

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- Definition

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

+ References

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- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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- Definition

Unused amount of commitments to extend credit to customers.

+ References

No definition available.

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Debt - Additional Information (Details) ¥ in Millions, $ in Millions		1 Months Ended		3 Months Ended		9 Months Ended
	Mar. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Aug. 31, 2022 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2023 CNY (¥)
Debt Instrument
Short-term borrowings	$ 671			$ 552		$ 552
Bank overdrafts				$ 67		$ 67
Stated rate	6.67%			5.41%		5.41%		5.41%
Proceeds from issuance of long-term and short-term borrowings						$ 699	$ 0
Long-term debt, principal	$ 4,941			$ 4,934		4,934
Loss on extinguishment of debt, net				0	$ 0	(5)	$ 0
2020 Term Loans
Debt Instrument
Extinguishment of debt				482
Modification of debt				268		268
Long-term debt, principal				750		$ 750
Loss on extinguishment of debt, net				$ 5
2023 Term Loans
Debt Instrument
Proceeds from issuance of long-term and short-term borrowings		$ 750
Quarterly amortization payments		0.25%
Senior Notes due November 2026
Debt Instrument
Stated rate				3.25%		3.25%		3.25%
Senior Notes due April 2029
Debt Instrument
Stated rate				3.375%		3.375%		3.375%
Senior Notes Due 2030
Debt Instrument
Stated rate				4.75%		4.75%		4.75%
Senior Notes due August 2031
Debt Instrument
Stated rate				3.875%		3.875%		3.875%
Letter of Credit
Debt Instrument
Unused commitments to extend credit				$ 275		$ 275
Remaining borrowing capacity				230		230
ABL Revolver
Debt Instrument
ABL revolver facility, current amount			$ 500
ABL revolver facility, maximum capacity			$ 2,000
SOFR \| Term Loan Facility
Debt Instrument
Brazil loan	0.15%
SOFR \| Term Loan Facility \| 2020 Term Loans
Debt Instrument
Brazil loan	1.75%
SOFR \| Term Loan Facility \| 2021 Term Loans
Debt Instrument
Brazil loan	2.00%
SOFR \| 2023 Term Loans
Debt Instrument
Brazil loan		1.65%
SOFR \| Minimum \| ABL Revolver
Debt Instrument
Brazil loan			1.10%
SOFR \| Maximum \| ABL Revolver
Debt Instrument
Brazil loan			1.60%
Term SOFR \| ABL Revolver
Debt Instrument
Stated rate			1.00%
Prime Rate \| Minimum \| ABL Revolver
Debt Instrument
Brazil loan			0.10%
Prime Rate \| Maximum \| ABL Revolver
Debt Instrument
Brazil loan			0.60%
ABL Revolver
Debt Instrument
Short-term borrowings				238		238
Amount outstanding				45		45
Remaining borrowing capacity				1,200		1,200
Brazil Loans
Debt Instrument
Short-term borrowings				200		200
China Revolver
Debt Instrument
Short-term borrowings				$ 47		$ 47		¥ 336