XML 57 R37.htm IDEA: XBRL DOCUMENT
v3.21.2

ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2021
Equity [Abstract] |
Changes in Accumulated Other Comprehensive Income/(Loss) by Component, Net of Tax | The changes in accumulated other comprehensive income/(loss) by component, net of tax, are as follows:
| For the Nine Months Ended September 30, 2021 |  | For the Nine Months Ended September 30, 2020
Eversource (Millions of Dollars) | Qualified Cash Flow Hedging Instruments |  | Unrealized Gains/(Losses) on Marketable Securities |  | Defined Benefit Plans |  | Total |  | Qualified Cash Flow Hedging Instruments |  | Unrealized Gains on Marketable Securities |  | Defined Benefit Plans |  | Total
Balance as of Beginning of Period | $ | (1.4) |  |  | $ | 1.1 |  |  | $ | (76.1) |  |  | $ | (76.4) |  |  | $ | (3.0) |  |  | $ | 0.7 |  |  | $ | (62.8) |  |  | $ | (65.1) |
OCI Before Reclassifications | — |  |  | (0.6) |  |  | (2.4) |  |  | (3.0) |  |  | — |  |  | 0.3 |  |  | (1.6) |  |  | (1.3) |
Amounts Reclassified from AOCI | 1.0 |  |  | — |  |  | 6.5 |  |  | 7.5 |  |  | 1.2 |  |  | — |  |  | 4.8 |  |  | 6.0 |
Net OCI | 1.0 |  |  | (0.6) |  |  | 4.1 |  |  | 4.5 |  |  | 1.2 |  |  | 0.3 |  |  | 3.2 |  |  | 4.7 |
Balance as of End of Period | $ | (0.4) |  |  | $ | 0.5 |  |  | $ | (72.0) |  |  | $ | (71.9) |  |  | $ | (1.8) |  |  | $ | 1.0 |  |  | $ | (59.6) |  |  | $ | (60.4) |

X
- References No definition available. + Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
Name: | us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration