Acquisitions and Dispositions (Tables)

12 Months Ended

Dec. 31, 2017

Business Combinations [Abstract]

Schedule of values and weighted-average useful life allocated to intangible assets

The values allocated to intangible assets are as follows:

(In millions)	Gross Carrying Amount		Weighted-Average Useful Life
Customer related intangible assets	$	92	15 years
Acquired software and technology	71		7 years
	$	163	12 years