Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

Future minimum operating lease payments at December 31, 2017 are as follows:

	(Millions)
2018	$	46
2019	36
2020	30
2021	23
2022	18
Beyond 2022	25
Total minimum lease payments	$	178

Warranty Accrual Table

Below is a table that shows the activity in the warranty accrual accounts:

	Year Ended December 31,
	2017			2016			2015
	(Millions)
Beginning Balance	$	20		$	23		$	26
Accruals related to product warranties	16			12			15
Reductions for payments made	(10		)	(15		)	(18		)
Ending Balance	$	26		$	20		$	23