Provision (Benefit) for Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Expense (Benefit), Continuing Operations [Abstract]

Schedule of Components of Provision (benefit) for income taxes [Table Text Block]

The Provision (benefit) for income taxes includes:

	Years Ended December 31,
	2015			2014			2013
	(Millions)
Current:
Federal	$	—		$	(9	)	$	(17	)
State	(7		)	2			7
Foreign	(55		)	10			(13		)
	(62		)	3			(23		)
Deferred:
Federal	(317		)	1,108			348
State	(25		)	119			40
Foreign	5			19			36
	(337		)	1,246			424
Provision (benefit) for income taxes	$	(399	)	$	1,249		$	401

Provision for income taxes at federal statutory rate [Table Text Block]

Reconciliations from the Provision (benefit) at statutory rate to recorded Provision (benefit) for income taxes are as follows:

	Years Ended December 31,
	2015			2014			2013
	(Millions)
Provision (benefit) at statutory rate	$	(600	)	$	1,255		$	378
Increases (decreases) in taxes resulting from:
Impact of nontaxable noncontrolling interests	263			(75		)	(78		)
State income taxes (net of federal benefit)	(21		)	82			26
Foreign operations – net	8			(11		)	(32		)
Taxes on undistributed earnings of foreign subsidiaries – net	—			(37		)	99
Translation adjustment of certain unrecognized tax benefits	(71		)	—			—
Other – net	22			35			8
Provision (benefit) for income taxes	$	(399	)	$	1,249		$	401

Deferred tax liabilities and Deferred tax assets [Table Text Block]

Significant components of Deferred income tax liabilities and Deferred income tax assets are as follows:

	December 31,
	2015		2014
	(Millions)
Deferred income tax liabilities:
Property, plant, and equipment	$	4	$	4
Investments	5,272		5,472
Other	15		10
Total deferred income tax liabilities	5,291		5,486
Deferred income tax assets:
Accrued liabilities	150		178
Minimum tax credits	139		137
Foreign tax credit	193		251
Federal loss carryovers	485		134
State losses and credits	296		250
Other	42		97
Total deferred income tax assets	1,305		1,047
Less valuation allowance	190		206
Net deferred income tax assets	1,115		841
Overall net deferred income tax liabilities	$	4,176	$	4,645

Reconciliation of unrecognized tax benefits [Table Bext Block]

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:

	2015			2014
	(Millions)
Balance at beginning of period	$	89		$	66
Additions based on tax positions related to the current year	—			11
Additions for tax positions of prior years	2			12
Reductions for tax positions of prior years	—			—
Settlement with taxing authorities	—			—
Changes due to currency translation	(36		)	—
Balance at end of period	$	55		$	89