Contract With Customer, Performance Obligation Satisfied In Previous Period Of The Same Year

No definition available.

Name:	mas_ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriodOfTheSameYear
Namespace Prefix:	mas_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount, before allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130531-203044

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130532-203044

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of revenue recognized from performance obligation satisfied or partially satisfied in previous reporting periods. Includes, but is not limited to, change in transaction price.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12A
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL108322424-203045

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
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-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

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-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

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-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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Data Type:	na
Balance Type:
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Balance Type:
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Balance Type:
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- Details

Name:	srt_StatementGeographicalAxis=srt_NorthAmericaMember
Namespace Prefix:
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Balance Type:
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- Details

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Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Revenue (Details) - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 2,275	$ 2,297	$ 4,183	$ 4,217
Contract with customer, asset, gross, current	14		14		$ 14
Contract with customer, liability	14		14		$ 41
Performance obligation satisfied in previous period of the same year	(1)	3
Performance obligation satisfied in previous period	1	3	1	3
Plumbing Products
Disaggregation of Revenue [Line Items]
Net sales	1,012	1,032	1,952	2,003
Decorative Architectural Products
Disaggregation of Revenue [Line Items]
Net sales	827	806	1,400	1,351
Cabinetry Products
Disaggregation of Revenue [Line Items]
Net sales	251	268	488	485
Windows and Other Specialty Products
Disaggregation of Revenue [Line Items]
Net sales	185	191	343	378
North America
Disaggregation of Revenue [Line Items]
Net sales	1,891	1,872	3,426	3,388
North America \| Plumbing Products
Disaggregation of Revenue [Line Items]
Net sales	661	647	1,259	1,252
North America \| Decorative Architectural Products
Disaggregation of Revenue [Line Items]
Net sales	827	806	1,400	1,351
North America \| Cabinetry Products
Disaggregation of Revenue [Line Items]
Net sales	251	268	488	485
North America \| Windows and Other Specialty Products
Disaggregation of Revenue [Line Items]
Net sales	152	151	279	300
International, principally Europe
Disaggregation of Revenue [Line Items]
Net sales	384	425	757	829
International, principally Europe \| Plumbing Products
Disaggregation of Revenue [Line Items]
Net sales	351	385	693	751
International, principally Europe \| Decorative Architectural Products
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
International, principally Europe \| Cabinetry Products
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
International, principally Europe \| Windows and Other Specialty Products
Disaggregation of Revenue [Line Items]
Net sales	$ 33	$ 40	$ 64	$ 78