Geographic and Segment Information - (Schedule of Segment Information) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Net sales	$ 1,464	$ 1,628	$ 1,816	$ 1,730	$ 1,575	$ 1,584	$ 1,588	$ 1,437	$ 6,638	$ 6,183	$ 5,400
Adjusted EBITDA									1,740	1,422	822
Depreciation and amortization									284	273	284
Equity in earnings of affiliates									43	33	29
Net assets	1,020				865				1,020	865	104
Investments in affiliates	160				173				160	173	136	$ 136
Purchases of property, plant, and equipment									498	411	338
Operating Segments [Member] | Fluoroproducts [Member]
Segment Reporting Information [Line Items]
Net sales									2,862	2,654	2,264
Adjusted EBITDA									783	669	445
Depreciation and amortization									117	109	101
Equity in earnings of affiliates									43	33	26
Net assets	2,309				1,842				2,309	1,842	1,400
Investments in affiliates	160				173				160	173	116
Purchases of property, plant, and equipment									274	249	120
Operating Segments [Member] | Chemical Solutions [Member]
Segment Reporting Information [Line Items]
Net sales									602	571	772
Adjusted EBITDA									64	57	39
Depreciation and amortization									20	18	30
Net assets	506				460				506	460	292
Purchases of property, plant, and equipment									75	65	104
Operating Segments [Member] | Titanium Technologies [Member]
Segment Reporting Information [Line Items]
Net sales									3,174	2,958	2,364
Adjusted EBITDA									1,055	862	466
Depreciation and amortization									119	118	119
Net assets	1,487				1,785				1,487	1,785	1,513
Purchases of property, plant, and equipment									91	65	105
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Adjusted EBITDA									(162)	(166)	(128)
Depreciation and amortization									28	28	34
Equity in earnings of affiliates											3
Net assets	$ (3,282)				$ (3,222)				(3,282)	(3,222)	(3,101)
Investments in affiliates											20
Purchases of property, plant, and equipment									$ 58	$ 32	$ 9