How do I report dividends and interest on Joint accounts that all use his SSN as the tax ID, if we file separate tax returns?

My husband and I have a joint brokerage account that reported dividends, interest, and capital gains.  The account is in his SSN for tax purposes. 

If we file separate returns do I report all of this income on his tax return?

Can I simply divide everything in half and report each half on our individual returns?