Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

AB GLOBAL RISK ALLOCATION FUND, INC.

Prospectus Date

rr_ProspectusDate

Feb. 27, 2015

Supplement [Text Block]

agrafi_SupplementTextBlock

AB GLOBAL RISK ALLOCATION FUND

(the “Fund”)

Supplement dated June 1, 2015 to the Summary Prospectus and Prospectus dated February 27, 2015 of the Fund (together, the “Prospectuses”).

*        *        *         *        *

The following performance information replaces information on the Russell 1000 Value Index in the Performance Table in the Summary section of the Prospectuses.

Average Annual Total Returns (For the periods ended December 31, 2014)

	1 Year			5 Years			10 Years
MSCI World Index (reflects no deduction for fees, expenses or taxes)		4.94	%		10.20	%		6.03	%

AB GLOBAL RISK ALLOCATION FUND, INC.

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

agrafi_SupplementTextBlock

AB GLOBAL RISK ALLOCATION FUND

(the “Fund”)

Supplement dated June 1, 2015 to the Summary Prospectus and Prospectus dated February 27, 2015 of the Fund (together, the “Prospectuses”).

*        *        *         *        *

The following performance information replaces information on the Russell 1000 Value Index in the Performance Table in the Summary section of the Prospectuses.

Average Annual Total Returns (For the periods ended December 31, 2014)

	1 Year			5 Years			10 Years
MSCI World Index (reflects no deduction for fees, expenses or taxes)		4.94	%		10.20	%		6.03	%

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (For the periods ended December 31, 2014)

AB GLOBAL RISK ALLOCATION FUND, INC. | MSCI World Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

4.94%

5 Years

rr_AverageAnnualReturnYear05

10.20%

10 Years

rr_AverageAnnualReturnYear10

6.03%