Debt - Subsidiary Non-recourse Debt in Default or Accelerated (Details) $ in Millions	Sep. 30, 2019 USD ($)
Nonrecourse Debt Default [Line Items]
Materiality threshold for cash distribution from business to Parent	20.00%
Debt defaults at risk of causing cross default	0
Debt Default Amount	$ 341
Covenant Violation [Member] | PUERTO RICO
Nonrecourse Debt Default [Line Items]
Net Assets	158
Debt Default Amount	295
Covenant Violation [Member] | AES llumina [Member]
Nonrecourse Debt Default [Line Items]
Net Assets	19
Debt Default Amount	33
Covenant Violation [Member] | Jordan [Member]
Nonrecourse Debt Default [Line Items]
Net Assets	3
Debt Default Amount	$ 13