XML 47 R31.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Compensation and Benefit Plans (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2018
Pension Plans |
Defined Benefit Plan Disclosure [Line Items] |
Expense Components for Plans | Net periodic pension expense components for continuing operations are:
| Edison International |  | SCE
| Three months ended March 31,
(in millions) | 2018 |  | 2017 2 |  | 2018 |  | 2017 2
Service cost | $ | 32 |  |  | $ | 36 |  |  | $ | 31 |  |  | $ | 35 |
Interest cost | 35 |  |  | 41 |  |  | 32 |  |  | 37 |
Expected return on plan assets | (57 | ) |  | (53 | ) |  | (53 | ) |  | (50 | )
Amortization of prior service cost | 1 |  |  | 1 |  |  | 1 |  |  | 1 |
Amortization of net loss 1 | 2 |  |  | 5 |  |  | 1 |  |  | 4 |
Regulatory adjustment (deferred) | 2 |  |  | (3 | ) |  | 2 |  |  | (3 | )
Total non-service cost | $ | (17 | ) |  | $ | (9 | ) |  | $ | (17 | ) |  | $ | (11 | )
Total expense recognized | $ | 15 |  |  | $ | 27 |  |  | $ | 14 |  |  | $ | 24 |
1 | Includes the amount of net loss reclassified from other comprehensive loss. The amount reclassified for Edison International and SCE was $2 million and $1 million, respectively, for the three months ended March 31, 2018, and $3 million and $2 million, respectively, for the three months ended March 31, 2017.
2 | During the first quarter of 2018, Edison International and SCE adopted an accounting standard retrospectively related to the presentation of the components of net periodic benefit costs for the defined benefit pension and other postretirement plans. Prior years' consolidated income statements have been updated to reflect the retrospective application of this accounting standard. Service and non-service costs are included in "Operation and maintenance" and "Other income and expenses," respectively, on the consolidated income statement. See Note 1 for further information.
PBOP Plan |
Defined Benefit Plan Disclosure [Line Items] |
Expense Components for Plans | Net periodic PBOP expense components for continuing operations are:
| Edison International |  | SCE
| Three months ended March 31,
(in millions) | 2018 |  | 2017 1 |  | 2018 |  | 2017 1
Service cost | $ | 9 |  |  | $ | 9 |  |  | $ | 9 |  |  | $ | 9 |
Interest cost | 21 |  |  | 24 |  |  | 21 |  |  | 24 |
Expected return on plan assets | (30 | ) |  | (27 | ) |  | (30 | ) |  | (27 | )
Amortization of prior service cost | — |  |  | (1 | ) |  | — |  |  | (1 | )
Total non-service cost | $ | (9 | ) |  | $ | (4 | ) |  | $ | (9 | ) |  | $ | (4 | )
Total expense | $ | — |  |  | $ | 5 |  |  | $ | — |  |  | $ | 5 |
1 | During the first quarter of 2018, Edison International and SCE adopted an accounting standard retrospectively related to the presentation of the components of net periodic benefit costs for the defined benefit pension and other postretirement plans. Prior years' consolidated income statements have been updated to reflect the retrospective application of this accounting standard. Service and non-service costs are included in "Operation and maintenance" and "Other income and expenses," respectively, on the consolidated income statement. See Note 1 for further information.

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_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |