John Hancock Multi Asset Credit ETF S000110542 [Member] None or SAME C000281804 [Member] Active Trading Market Risk [Member] Asset Backed Securities Risk [Member] Authorized Participant Concentration Risk [Member] Cash Transactions Risk [Member] Changing Distribution Levels Risk [Member] Collateralized loan obligations risk [Member] Convertible Securities Risk [Member] Credit And Counterparty Risk [Member] Economic And Market Events Risk [Member] Equity Securities Risk [Member] ETF Trading Risk [Member] Fixed Income Securities Risk [Member] Floating Rate Loans Risk [Member] Foreign Securities Risk [Member] Hedging Derivatives And Other Strategic Transactions Risk [Member] Inflation Deflation risk [Member] Interest Rate Risk [Member] Lending risk [Member] Lower Rated And High Yield Fixed Income Securities Risk [Member] Management Risk [Member] Mortgage Backed Securities Risk [Member] Operational And Cybersecurity Risk [Member] Premium Discount Risk [Member] Trading Issues Risk [Member]