be all the same to
• be unimportant to (someone) what happens.
• "it was all the same to me where it was being sold"
Similar:
immaterial,
of no importance,
of no consequence,
inconsequential,
unimportant,
of no matter/moment,
of little account,
irrelevant,
insignificant,
trivial,
petty,
slight,
inappreciable,
Opposite:
of great importance,