xbrli:shares
iso4217:USD
iso4217:EUR
xbrli:pure
iso4217:USD
xbrli:shares
iso4217:EUR
xbrli:shares
iso4217:EUR
xbrli:shares
9695004OAPTHOKN99645
2019-12-31
9695004OAPTHOKN99645
2020-12-31
9695004OAPTHOKN99645
2019-01-01
2019-12-31
9695004OAPTHOKN99645
2020-01-01
2020-12-31
9695004OAPTHOKN99645
2019-01-01
9695004OAPTHOKN99645
2020-01-01
9695004OAPTHOKN99645
2019-01-01
2019-12-31
ifrs-full:AdditionalPaidinCapitalMember
9695004OAPTHOKN99645
2019-01-01
ifrs-full:AdditionalPaidinCapitalMember
9695004OAPTHOKN99645
2020-01-01
2020-12-31
ifrs-full:AdditionalPaidinCapitalMember
9695004OAPTHOKN99645
2019-12-31
ifrs-full:AdditionalPaidinCapitalMember
9695004OAPTHOKN99645
2020-12-31
ifrs-full:AdditionalPaidinCapitalMember
9695004OAPTHOKN99645
2019-01-01
2019-12-31
ifrs-full:EquityAttributableToOwnersOfParentMember
9695004OAPTHOKN99645
2019-01-01
ifrs-full:EquityAttributableToOwnersOfParentMember
9695004OAPTHOKN99645
2020-01-01
2020-12-31
ifrs-full:EquityAttributableToOwnersOfParentMember
9695004OAPTHOKN99645
2019-12-31
ifrs-full:EquityAttributableToOwnersOfParentMember
9695004OAPTHOKN99645
2020-12-31
ifrs-full:EquityAttributableToOwnersOfParentMember
9695004OAPTHOKN99645
2019-01-01
2019-12-31
ifrs-full:IssuedCapitalMember
9695004OAPTHOKN99645
2019-01-01
ifrs-full:IssuedCapitalMember
9695004OAPTHOKN99645
2020-01-01
2020-12-31
ifrs-full:IssuedCapitalMember
9695004OAPTHOKN99645
2019-12-31
ifrs-full:IssuedCapitalMember
9695004OAPTHOKN99645
2020-12-31
ifrs-full:IssuedCapitalMember
9695004OAPTHOKN99645
2019-01-01
2019-12-31
ifrs-full:NoncontrollingInterestsMember
9695004OAPTHOKN99645
2019-01-01
ifrs-full:NoncontrollingInterestsMember
9695004OAPTHOKN99645
2020-01-01
2020-12-31
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2019-12-31
ifrs-full:NoncontrollingInterestsMember
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2020-12-31
ifrs-full:NoncontrollingInterestsMember
9695004OAPTHOKN99645
2019-01-01
2019-12-31
altareit:ReservesAndRetainedEarningMember
9695004OAPTHOKN99645
2019-01-01
altareit:ReservesAndRetainedEarningMember
9695004OAPTHOKN99645
2020-01-01
2020-12-31
altareit:ReservesAndRetainedEarningMember
9695004OAPTHOKN99645
2019-12-31
altareit:ReservesAndRetainedEarningMember
9695004OAPTHOKN99645
2020-12-31
altareit:ReservesAndRetainedEarningMember
01/01/2020 – 31/12/2020