v3.25.2
Shareholder Report
 6 Months Ended
Apr. 30, 2025
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name T. ROWE PRICE GLOBAL ALLOCATION FUND, INC.
Entity Central Index Key 0001571768
Entity Investment Company Type N-1A
Document Period End Date Apr. 30, 2025
C000127047  
Shareholder Report [Line Items]  
Fund Name Global Allocation Fund
Class Name Investor Class
Trading Symbol RPGAX
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary.
Material Fund Change Notice [Text Block]  
Additional Information Phone Number 1‑800‑638‑5660
Additional Information Email <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify; white-space-collapse: preserve-breaks;">info@troweprice.com</span>
Additional Information Website www.troweprice.com/prospectus
Expenses [Text Block]

What were the fund costs for the last six months? (based on a hypothetical $10,000 investment)

 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Global Allocation Fund - Investor Class
$39
0.78%
Expenses Paid, Amount $ 39
Expense Ratio, Percent 0.78%
AssetsNet $ 751,451,000
Holdings Count | Holding 1,487
InvestmentCompanyPortfolioTurnover 19.40%
Additional Fund Statistics [Text Block]

What are some fund statistics?

Fund Statistics

Total Net Assets (000s)
$751,451
Number of Portfolio Holdings
1,487
Holdings [Text Block]

Security Allocation (as a % of Net Assets)

Common Stocks
54.9%
Bond Mutual Funds
14.3
Private Investment Companies
8.6
Equity Mutual Funds
7.8
U.S. Government Agency Obligations (Excluding Mortgage-Backed)
7.6
Corporate Bonds
3.6
Securities Lending Collateral
0.5
Common Stocks - China A Shares
0.4
Short-Term and Other
2.3
Largest Holdings [Text Block]

Top Ten Holdings (as a % of Net Assets)

Blackstone Partners Offshore Fund
8.6%
T. Rowe Price Integrated U.S. Small-Mid Cap Core Equity Fund - I Class
5.3
T. Rowe Price Emerging Markets Bond Fund - I Class
3.7
T. Rowe Price International Bond Fund - I Class
3.1
U.S. Treasury Inflation-Indexed Notes
2.9
T. Rowe Price Multi-Strategy Total Return Fund - I Class
2.6
U.S. Treasury Notes
2.3
T. Rowe Price Institutional High Yield Fund - Institutional Class
2.3
T. Rowe Price Emerging Markets Local Currency Bond Fund - I Class
2.1
U.S. Treasury Bonds
2.0
Material Fund Change [Text Block]
Updated Prospectus Web Address www.troweprice.com/paperless
C000127048  
Shareholder Report [Line Items]  
Fund Name Global Allocation Fund
Class Name Advisor Class
Trading Symbol PAFGX
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary.
Material Fund Change Notice [Text Block]  
Additional Information Phone Number 1‑800‑638‑5660
Additional Information Email <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify; white-space-collapse: preserve-breaks;">info@troweprice.com</span>
Additional Information Website www.troweprice.com/prospectus
Expenses [Text Block]

What were the fund costs for the last six months? (based on a hypothetical $10,000 investment)

 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Global Allocation Fund - Advisor Class
$50
1.01%
Expenses Paid, Amount $ 50
Expense Ratio, Percent 1.01%
AssetsNet $ 751,451,000
Holdings Count | Holding 1,487
InvestmentCompanyPortfolioTurnover 19.40%
Additional Fund Statistics [Text Block]

What are some fund statistics?

Fund Statistics

Total Net Assets (000s)
$751,451
Number of Portfolio Holdings
1,487
Holdings [Text Block]

Security Allocation (as a % of Net Assets)

Common Stocks
54.9%
Bond Mutual Funds
14.3
Private Investment Companies
8.6
Equity Mutual Funds
7.8
U.S. Government Agency Obligations (Excluding Mortgage-Backed)
7.6
Corporate Bonds
3.6
Securities Lending Collateral
0.5
Common Stocks - China A Shares
0.4
Short-Term and Other
2.3
Largest Holdings [Text Block]

Top Ten Holdings (as a % of Net Assets)

Blackstone Partners Offshore Fund
8.6%
T. Rowe Price Integrated U.S. Small-Mid Cap Core Equity Fund - I Class
5.3
T. Rowe Price Emerging Markets Bond Fund - I Class
3.7
T. Rowe Price International Bond Fund - I Class
3.1
U.S. Treasury Inflation-Indexed Notes
2.9
T. Rowe Price Multi-Strategy Total Return Fund - I Class
2.6
U.S. Treasury Notes
2.3
T. Rowe Price Institutional High Yield Fund - Institutional Class
2.3
T. Rowe Price Emerging Markets Local Currency Bond Fund - I Class
2.1
U.S. Treasury Bonds
2.0
Material Fund Change [Text Block]
Updated Prospectus Web Address www.troweprice.com/paperless
C000169948  
Shareholder Report [Line Items]  
Fund Name Global Allocation Fund
Class Name I Class
Trading Symbol TGAFX
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary.
Material Fund Change Notice [Text Block]  
Additional Information Phone Number 1‑800‑638‑5660
Additional Information Email <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify; white-space-collapse: preserve-breaks;">info@troweprice.com</span>
Additional Information Website www.troweprice.com/prospectus
Expenses [Text Block]

What were the fund costs for the last six months? (based on a hypothetical $10,000 investment)

 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Global Allocation Fund - I Class
$30
0.60%
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.60%
AssetsNet $ 751,451,000
Holdings Count | Holding 1,487
InvestmentCompanyPortfolioTurnover 19.40%
Additional Fund Statistics [Text Block]

What are some fund statistics?

Fund Statistics

Total Net Assets (000s)
$751,451
Number of Portfolio Holdings
1,487
Holdings [Text Block]

Security Allocation (as a % of Net Assets)

Common Stocks
54.9%
Bond Mutual Funds
14.3
Private Investment Companies
8.6
Equity Mutual Funds
7.8
U.S. Government Agency Obligations (Excluding Mortgage-Backed)
7.6
Corporate Bonds
3.6
Securities Lending Collateral
0.5
Common Stocks - China A Shares
0.4
Short-Term and Other
2.3
Largest Holdings [Text Block]

Top Ten Holdings (as a % of Net Assets)

Blackstone Partners Offshore Fund
8.6%
T. Rowe Price Integrated U.S. Small-Mid Cap Core Equity Fund - I Class
5.3
T. Rowe Price Emerging Markets Bond Fund - I Class
3.7
T. Rowe Price International Bond Fund - I Class
3.1
U.S. Treasury Inflation-Indexed Notes
2.9
T. Rowe Price Multi-Strategy Total Return Fund - I Class
2.6
U.S. Treasury Notes
2.3
T. Rowe Price Institutional High Yield Fund - Institutional Class
2.3
T. Rowe Price Emerging Markets Local Currency Bond Fund - I Class
2.1
U.S. Treasury Bonds
2.0
Material Fund Change [Text Block]
Updated Prospectus Web Address www.troweprice.com/paperless