Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2017

Accrued Liabilities, Current [Abstract]

Accrued Liabilities [Table Text Block]

	December 31,
	2017		2016
	(Millions)
Deferred income	$	361	$	338
Interest on debt	267		310
Employee costs	202		223
Refundable deposits	—		160
Property taxes	63		55
Asset retirement obligations	53		61
Other, including other loss contingencies	221		301
	$	1,167	$	1,448