Benefit Plans (Narrative) (Details) $ in Millions |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2019
USD ($)
plan
|
Dec. 31, 2018
USD ($)
|
Dec. 31, 2017
USD ($)
|
|
Defined Benefit Plan Disclosure [Line Items] | |||
Defined contribution plan, number of plans | 4 | ||
Defined contribution plan, award vesting period | 5 years | ||
Defined contribution plan contributions | $ | $ 19 | $ 21 | $ 23 |
Defined benefit plan, number of plans disclosure | 28 | ||
U.S. Non-Union Number of Defined Contribution Plans | 2 | ||
Parent Company Number of Defined Contribution Plans | 1 | ||
DPL Number of Non-Union Defined Contribution Plans | 1 | ||
UNITED STATES | |||
Defined Benefit Plan Disclosure [Line Items] | |||
Defined benefit plan, number of plans disclosure | 5 |