Australia, who opted to bat first, scored set a 265-run target courtesy opener David Warner's 156 off 128 balls courtesy 13 boundaries and four maximums.
Ton-up Warner helps Australia reclaim Chappell-Hadlee Trophy
For New Zealand, Trent Boult accounted for three batsmen, while Colin de Grandhomme and spinner Mitchell Santner bagged a brace each.
In their chase, New Zealand never looked set and kept losing wickets to end the innings on 147 in 36.1 overs. Martin Guptill top-scored for the visitors with 34 runs off 40 balls.
Mitchell Starc bagged three wickets for the Aussies while Pat Cummins, James Faulkner and Travis Head bagged two wickets a piece.
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