XML 105 R88.htm IDEA: XBRL DOCUMENT v3.19.1

Common Stock (Narrative) (Details) pure in Millions	Dec. 31, 2018
Emera Inc | Convertible Subordinated Debt [Member]
Debt Instrument [Line Items]
Number of depository receipt instruments issued	1.8

X

- Definition

The number of depository receipt financial instruments issued.

+ References

No definition available.

+ Details

Name:	ema_NumberOfDepositoryReceiptInstrumentsIssued
Namespace Prefix:	ema_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ConsolidatedEntitiesAxis=us-gaap_ParentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_ConvertibleSubordinatedDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: