Business Acquisitions and Dispositions (Tables)

12 Months Ended

Dec. 31, 2016

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

The following table summarizes the provisional amounts recognized for assets acquired and liabilities assumed as of December 31, 2014, as well as adjustments made through March 31, 2015, when the allocation became final. Measurement period adjustments primarily reflect the tax impact of the acquisition date fair values and final estimates for asset retirement obligations. The purchase price of $3.5 billion was allocated as follows:



	Acquisition Date Fair Value at December 31, 2014		Measurement period adjustments			Revised Acquisition Date
	(In millions)
Assets
Cash	$	1,422	$	—		$	1,422
Current assets	724		72			796
Property, plant and equipment	2,438		(3		)	2,435
Intangible assets	172		—			172
Goodwill	334		(56		)	278
Non-current assets	773		—			773
Total assets acquired	5,863		13			5,876

Liabilities
Current and non-current liabilities	629		13			642
Out-of-market contracts and leases	159		—			159
Long-term debt	1,249		—			1,249
Total liabilities assumed	2,037		13			2,050
Less: noncontrolling interest	352		—			352
Net assets acquired	$	3,474	$	—		$	3,474

Alta Wind Portfolio [Member]

Business Acquisition [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

The following table summarizes the provisional amounts recognized for assets acquired and liabilities assumed as of December 31, 2014, as well as adjustments made through August 11, 2015, when the allocation became final. The purchase price of $923 million was allocated as follows:



	Acquisition Date Fair Value at December 31, 2014		Measurement period adjustments			Revised Acquisition Date
	(In millions)
Assets
Cash	$	22	—			$	22
Current and non-current assets	49		(2		)	47
Property, plant and equipment	1,304		6			1,310
Intangible assets	1,177		(6		)	1,171
Total assets acquired	2,552		(2		)	2,550

Liabilities
Debt	1,591		—			1,591
Current and non-current liabilities	38		(2		)	36
Total liabilities assumed	1,629		(2		)	1,627
Net assets acquired	$	923	$	—		$	923