Goodwill and Other Intangible Assets (Carrying Amount of Goodwill by Segment) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($)
Balance	$ 1,694
Foreign currency translation adjustment	4
Balance	1,698
Display Technologies [Member]
Balance	136
Balance	136
Optical Communications [Member]
Balance	671
Foreign currency translation adjustment	(2)
Balance	669
Specialty Materials [Member]
Balance	150
Balance	150
Life Sciences [Member]
Balance	623
Foreign currency translation adjustment	4
Balance	627
All Other [Member]
Balance	114
Foreign currency translation adjustment	2
Balance	$ 116