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Commitments and Contingencies - Schedule of Future Minimum Payments for Licensing and Similar Agreements (Detail) $ in Thousands	Dec. 31, 2020 USD ($)
Commitments and Contingencies Disclosure [Abstract]
2021	$ 52,756
2022	43,056
2023	35,682
2024	1,259
2025	143
Thereafter	0
Total future minimum licensing and similar agreements obligations	$ 132,896

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- Definition

For licensing and similar agreements containing provisions for future minimum payments, the total required payments due.

+ References

No definition available.

+ Details

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- Definition

For licensing and similar agreements containing provisions for future minimum payments, required payments due within one year of the balance sheet date.

+ References

No definition available.

+ Details

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X

- Definition

For licensing and similar agreements containing provisions for future minimum payments, required payments due within the fifth year of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	mat_
Data Type:	xbrli:monetaryItemType
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- Definition

For licensing and similar agreements containing provisions for future minimum payments, required payments due within the fourth year of the balance sheet date.

+ References

No definition available.

+ Details

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- Definition

For licensing and similar agreements containing provisions for future minimum payments, required payments due within the third year of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	mat_
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Balance Type:	credit
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- Definition

For licensing and similar agreements containing provisions for future minimum payments, required payments due within the second year of the balance sheet date.

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No definition available.

+ Details

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- Definition

For licensing and similar agreements containing provisions for future minimum payments, required payments due after the fifth year of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	mat_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

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