John Hancock Preferred Income ETF Annual Total Returns	12 Months Ended
John Hancock Preferred Income ETF Annual Total Returns	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
John Hancock Preferred Income ETF \| N/A
Prospectus [Line Items]
Annual Return [Percent]	10.97%	7.11%	(9.99%)