XML 45 R17.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Defined Benefits | 3 Months Ended
--- | ---
Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract] |
Defined Benefits | 8. Defined Benefits (PPL, LKE and LG&E) Certain net periodic defined benefit costs are applied to accounts that are further distributed among capital, expense and regulatory assets, including certain costs allocated to applicable subsidiaries for plans sponsored by PPL Services and LKE. Following are the net periodic defined benefit costs (credits) of the plans sponsored by PPL and its subsidiaries, LKE and its subsidiaries and LG&E for the periods ended March 31:
| Pension Benefits
| Three Months
| U.S. |  | U.K.
| 2017 |  | 2016 |  | 2017 |  | 2016
PPL |  |  |  |  |  |  |
Service cost | $ | 17 |  |  | $ | 17 |  |  | $ | 19 |  |  | $ | 18 |
Interest cost | 42 |  |  | 43 |  |  | 43 |  |  | 62 |
Expected return on plan assets | (57 | ) |  | (56 | ) |  | (125 | ) |  | (133 | )
Amortization of: |  |  |  |  |  |  |
Prior service cost | 2 |  |  | 1 |  |  | — |  |  | — |
Actuarial loss | 20 |  |  | 15 |  |  | 35 |  |  | 37 |
Net periodic defined benefit costs (credits) before special termination benefits | 24 |  |  | 20 |  |  | (28 | ) |  | (16 | )
Special termination benefits (a) | 2 |  |  | — |  |  | — |  |  | — |
Net periodic defined benefit costs (credits) | $ | 26 |  |  | $ | 20 |  |  | $ | (28 | ) |  | $ | (16 | )
(a) | Enhanced pension benefits offered to certain PPL Electric bargaining unit employees under a one-time voluntary retirement window offered as part of the new five year IBEW contract ratified in March 2017.
| Pension Benefits
| Three Months
| 2017 |  | 2016
LKE |  |  |
Service cost | $ | 7 |  |  | $ | 6 |
Interest cost | 16 |  |  | 17 |
Expected return on plan assets | (22 | ) |  | (21 | )
Amortization of: |  |  |
Prior service cost | 2 |  |  | 1 |
Actuarial loss | 11 |  |  | 5 |
Net periodic defined benefit costs | $ | 14 |  |  | $ | 8 |
LG&E |  |  |
Interest cost | $ | 3 |  |  | $ | 3 |
Expected return on plan assets | (5 | ) |  | (5 | )
Amortization of: |  |  |
Prior service cost | 1 |  |  | 1 |
Actuarial loss | 3 |  |  | 2 |
Net periodic defined benefit costs | $ | 2 |  |  | $ | 1 |
| Other Postretirement Benefits
| Three Months
| 2017 |  | 2016
PPL |  |  |
Service cost | $ | 2 |  |  | $ | 2 |
Interest cost | 6 |  |  | 6 |
Expected return on plan assets | (6 | ) |  | (5 | )
Net periodic defined benefit costs | $ | 2 |  |  | $ | 3 |
LKE |  |  |
Service cost | $ | 1 |  |  | $ | 1 |
Interest cost | 2 |  |  | 2 |
Expected return on plan assets | (1 | ) |  | (2 | )
Amortization of prior service cost | — |  |  | 1 |
Net periodic defined benefit costs | $ | 2 |  |  | $ | 2 |
(PPL Electric, LG&E and KU) In addition to the specific plans it sponsors, LG&E is allocated costs of defined benefit plans sponsored by LKE. PPL Electric and KU do not directly sponsor any defined benefit plans. PPL Electric is allocated costs of defined benefit plans sponsored by PPL Services and KU is allocated costs of defined benefit plans sponsored by LKE. These allocations are based on participation in those plans, which management believes are reasonable. For the periods ended March 31, PPL Services allocated the following net periodic defined benefit costs to PPL Electric, and LKE allocated the following net periodic defined benefit costs to LG&E and KU:
| Three Months
| 2017 |  | 2016
PPL Electric | $ | 8 |  |  | $ | 6 |
LG&E | 3 |  |  | 2 |
KU | 4 |  |  | 3 |
Expected Cash Flows - U.K. Pension Plans (PPL) For the three months ended March 31, 2017, WPD contributed $462 million to its U.K. pension plans. WPD made additional contributions in the second quarter of 2017 of $23 million. These accelerated contributions fund all 2017 required contributions and a portion of 2018 required contributions. WPD does not expect to make additional contributions in 2017.

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

X
- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2410-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39675-114964 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66047640&loc=d3e39622-114963 + Details
Name: | us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration