Asset Impairment Expense (Tables)

9 Months Ended

Sep. 30, 2018

Impairment or Disposal of Tangible Assets Disclosure [Abstract]

Details of Impairment of Long-Lived Assets Held and Used by Asset

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
U.S. generation facility	$	73	$	—	$	156	$	—
Kazakhstan hydroelectric	—		2		—		92
Kazakhstan CHPs	—		—		—		94
DPL	—		—		—		66
Other	1		—		10		8
Total	$	74	$	2	$	166	$	260