Eaton Vance Tax-Advantaged Global Dividend Opportunities Fund (ETO) 424B3 20 Feb 24 Prospectus supplement Financial data

N-2

N-2 - USD ($)		Mar. 31, 2023	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Cover [Abstract]
Entity Central Index Key		0001281926
Amendment Flag		false
Document Type		424B3
Entity Registrant Name		EATON VANCE TAX-ADVANTAGED GLOBAL DIVIDEND OPPORTUNITIES FUND
Financial Highlights [Abstract]
Senior Securities [Table Text Block]		Selected data for a Common Share outstanding during the periods stated. Year Ended October 31, 2023 2022 2021 2020 2019 Net asset value – Beginning of year $ 21.990 $ 31.370 $ 22.390 $ 23.850 $ 22.180 Income (Loss) From Operations Net investment income (1) $ 0.849 $ 0.698 $ 0.471 $ 0.361 $ 0.441 Net realized and unrealized gain (loss) 1.500 (7.943 ) 10.303 0.098 3.389 Total income (loss) from operations $ 2.349 $ (7.245 ) $ 10.774 $ 0.459 $ 3.830 Less Distributions From net investment income $ (0.770 ) $ (0.698 ) $ (0.846 ) $ (0.338 ) $ (0.407 ) From net realized gain (0.879 ) (1.452 ) (0.974 ) (1.597 ) (1.753 ) Total distributions $ (1.649 ) $ (2.150 ) $ (1.820 ) $ (1.935 ) $ (2.160 ) Premium from common shares sold through shelf offering (1) $ — $ 0.015 $ 0.026 $ 0.016 $ — Net asset value – End of year $ 22.690 $ 21.990 $ 31.370 $ 22.390 $ 23.850 Market value – End of year $ 20.170 $ 22.240 $ 32.340 $ 19.740 $ 26.290 Total Investment Return on Net Asset Value (2) 11.13 % (23.80 )% 49.45 % 2.57 % 18.21 % Total Investment Return on Market Value (2) (2.32 )% (25.25 )% 74.75 % (17.96 )% 33.25 % Ratios/Supplemental Data Net assets, end of year (000’s omitted) $ 371,810 $ 360,448 $ 503,815 $ 351,153 $ 359,796 Ratios (as a percentage of average daily net assets): Expenses excluding interest and fees 1.22 % 1.18 % 1.15 % 1.24 % 1.28 % Interest and fee expense 1.45 % 0.41 % 0.14 % 0.50 % 1.06 % Total expenses 2.67 % (3) 1.59 % (3) 1.29 % 1.74 % 2.34 % Net investment income 3.54 % 2.63 % 1.63 % 1.58 % 1.95 % Portfolio Turnover 90 % 52 % 29 % 60 % 48 % Senior Securities: Total amount outstanding (in 000’s) $ 103,000 $ 103,000 $ 103,000 $ 103,000 $ 118,000 Asset coverage per $1,000 (4) $ 4,610 $ 4,500 $ 5,891 $ 4,409 $ 4,049 Year Ended October 31, 2018 2017 2016 2015 2014 Net asset value – Beginning of year $ 24.600 $ 21.790 $ 24.050 $ 26.150 $ 25.880 Income (Loss) From Operations Net investment income (1) $ 0.447 $ 0.490 $ 0.822 (5) $ 0.998 $ 1.549 (5) Net realized and unrealized gain (loss) (0.724 ) 4.480 (0.922 ) 0.033 1.070 Total income (loss) from operations $ (0.277 ) $ 4.970 $ (0.100 ) $ 1.031 $ 2.619 Less Distributions From net investment income $ (0.319 ) $ (0.475 ) $ (0.778 ) $ (0.997 ) $ (1.527 ) From net realized gain (1.841 ) (1.685 ) (1.382 ) (2.134 ) — Tax return of capital — $ (2.160 ) — — (0.822 ) Total distributions $ (2.160 ) $ — $ (2.160 ) $ (3.131 ) $ (2.349 ) Premium from common shares sold through shelf offering (1) $ 0.017 $ — $ — $ — $ — Net asset value – End of year $ 22.180 $ 24.600 $ 21.790 $ 24.050 $ 26.150 Market value – End of year $ 21.690 $ 24.850 $ 20.670 $ 22.490 $ 25.260 Total Investment Return on Net Asset Value (2) (1.50 )% 23.92 % 0.25 % 4.80 % 11.07 % Total Investment Return on Market Value (2) (4.65 )% 31.96 % 1.69 % 1.46 % 17.50 % Ratios/Supplemental Data Net assets, end of year (000’s omitted) $ 333,771 $ 357,756 $ 316,478 $ 349,321 $ 379,681 Ratios (as a percentage of average daily net assets) Expenses excluding interest and fees (6) 1.27 % 1.30 % 1.32 % 1.28 % 1.26 % Interest and fee expense 0.82 % 0.61 % 0.39 % 0.26 % 0.24 % Total expenses (6) 2.09 % 1.91 % 1.71 % 1.54 % 1.50 % Net investment income 1.83 % 2.10 % 3.67 % (5) 4.03 % 5.87 % (5) Portfolio Turnover 56 % 60 % 63 % 72 % 89 % Senior Securities: Total notes payable outstanding (in 000’s) $ 118,000 $ 118,000 $ 118,000 $ 118,000 $ 118,000 Asset coverage per $1,000 (4) $ 3,829 $ 4,032 $ 3,682 $ 3,960 $ 4,218 (1) Computed using average shares outstanding. (2) Returns are historical and are calculated by determining the percentage change in net asset value or market value with all distributions reinvested. Distributions are assumed to be reinvested at prices obtained under the Fund’s dividend reinvestment plan. (3) Includes a reduction by the investment adviser of a portion of its adviser fee due to the Fund’s investment in the Morgan Stanley Institutional Liquidity Funds – Government Portfolio (equal to less than 0.005% of average daily net assets for the years ended October 31, 2023 and 2022). (4) Calculated by subtracting the Fund’s total liabilities (not including the borrowings payable/notes payable) from the Fund’s total assets, and dividing the result by the borrowings payable/notes payable balance in thousands. (5) Net investment income per share includes special dividends which amounted to $0.230 and $0.692 per share for the years ended October 31, 2016 and 2014, respectively. Excluding special dividends, the ratio of net investment income to average daily net assets would have been 2.65% and 3.25% for the years ended October 31, 2016 and 2014, respectively. (6) Excludes the effect of custody fee credits, if any, of less than 0.005%. Effective September 1, 2015, custody fee credits, which were earned on cash deposit balances, were discontinued by the custodian.
Senior Securities Amount			$ 103,000	$ 103,000	$ 103,000	$ 103,000	$ 118,000	$ 118,000	$ 118,000	$ 118,000	$ 118,000	$ 118,000
Senior Securities Coverage per Unit	[1]		$ 4,610	$ 4,500	$ 5,891	$ 4,409	$ 4,049	$ 3,829	$ 4,032	$ 3,682	$ 3,960	$ 4,218
[1]Calculated by subtracting the Fund’s total liabilities (not including the borrowings payable/notes payable) from the Fund’s total assets, and dividing the result by the borrowings payable/notes payable balance in thousands.