Revenue (Tables)

6 Months Ended

Jun. 30, 2019

Revenue [Abstract]

Disaggregation of Revenue

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Display products	$	820	$	768	$	1,615	$	1,500
Telecommunication products		1,090		1,023		2,154		1,909
Specialty glass products		369		343		678		621
Environmental substrate and filter products		353		317		704		639
Life science products		255		245		494		477
All Other		53		51		107		101
Total Revenue	$	2,940	$	2,747	$	5,752	$	5,247