ACQUISITIONS - Intangible Assets Acquired (Details) $ in Millions	6 Months Ended
	Jun. 30, 2018 USD ($)
Paroc Group
Business Acquisition [Line Items]
Intangible assets acquired	$ 508
Pittsburgh Corning
Business Acquisition [Line Items]
Intangible assets acquired	245
Customer relationships \| Paroc Group
Business Acquisition [Line Items]
Intangible assets acquired	$ 215
Weighted average useful life	20 years
Customer relationships \| Pittsburgh Corning
Business Acquisition [Line Items]
Intangible assets acquired	$ 107
Weighted average useful life	19 years
Technology \| Pittsburgh Corning
Business Acquisition [Line Items]
Intangible assets acquired	$ 37
Weighted average useful life	15 years
Technology - Know-how \| Paroc Group
Business Acquisition [Line Items]
Intangible assets acquired	$ 61
Weighted average useful life	15 years
Technology - Patented \| Paroc Group
Business Acquisition [Line Items]
Intangible assets acquired	$ 12
Weighted average useful life	5 years
Quarry Rights \| Paroc Group
Business Acquisition [Line Items]
Intangible assets acquired	$ 7
Weighted average useful life	45 years
Trademarks \| Paroc Group
Business Acquisition [Line Items]
Intangible assets acquired	$ 213
Trademarks \| Pittsburgh Corning
Business Acquisition [Line Items]
Intangible assets acquired	$ 101