- Total Other Non-Operating Expense (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Other Nonoperating Income (Expense) [Line Items]
Other Nonoperating Expense	$ 128	$ 129	$ 50
Entek
Schedule of Other Nonoperating Income (Expense) [Line Items]
Other Nonoperating Expense	86	0	0
Silver Ridge Power
Schedule of Other Nonoperating Income (Expense) [Line Items]
Other Nonoperating Expense	42	0	0
Elsta
Schedule of Other Nonoperating Income (Expense) [Line Items]
Other Nonoperating Expense	0	129	0
China generation and wind
Schedule of Other Nonoperating Income (Expense) [Line Items]
Other Nonoperating Expense	0	0	32
InnoVent
Schedule of Other Nonoperating Income (Expense) [Line Items]
Other Nonoperating Expense	0	0	17
Other
Schedule of Other Nonoperating Income (Expense) [Line Items]
Other Nonoperating Expense	$ 0	$ 0	$ 1