Label	Element	Value
Putnam Focused Large Cap Growth ETF \| Information Technology [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	51.80%
Putnam Focused Large Cap Growth ETF \| Communication Services [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	16.70%
Putnam Focused Large Cap Growth ETF \| Consumer Discretionary [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	7.70%
Putnam Focused Large Cap Growth ETF \| Health Care [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	7.30%
Putnam Focused Large Cap Growth ETF \| Financials [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	6.20%
Putnam Focused Large Cap Growth ETF \| Industrials [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	5.80%
Putnam Focused Large Cap Growth ETF \| Materials [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	2.30%
Putnam Focused Large Cap Growth ETF \| Consumer Staples [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	1.80%
Putnam Focused Large Cap Growth ETF \| Short-Term Investments [Member]
Holdings [Line Items]	oef_HoldingsLineItems
Percent of Total Investments	oef_PctOfTotalInv	0.40%