Segment Reporting - Schedule of Segment Information (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total revenue	$ 119			$ 118			$ 394	$ 370
Depreciation, amortization and accretion	76			56			236	166
Impairment expense	0			3			0	7
Operating income (loss)	(32)			4			(39)	30
Earnings (loss) in unconsolidated investments	(10)			(4)			(16)	13
Interest expense	27			28			78	81
Income tax provision	1			3			9	14
Net income (loss)	(71)	$ (30)	$ (46)	(31)	$ (2)	$ (13)	(147)	(46)
Capital expenditures	(96)			(43)			(159)	(129)
Property, plant and equipment, net	3,917			4,110			3,917	4,110	$ 4,119
Unconsolidated investments	281			372			281	372	270
Total assets	5,396			5,372			5,396	5,372	$ 5,294
Operating Segments | Operating Business
Segment Reporting Information [Line Items]
Total revenue	116			116			387	363
Depreciation, amortization and accretion	76			52			234	163
Impairment expense				0			0	0
Operating income (loss)	(18)			17			1	62
Earnings (loss) in unconsolidated investments	2			1			15	30
Interest expense	14			15			41	46
Income tax provision	1			3			5	6
Net income (loss)	(31)			(1)			(34)	40
Adjusted EBITDA	86			86			311	294
Capital expenditures	(95)			(40)			(155)	(124)
Property, plant and equipment, net	3,853			4,044			3,853	4,044
Unconsolidated investments	296			346			296	346
Total assets	8,892			8,992			8,892	8,992
Operating Segments | Development Investment
Segment Reporting Information [Line Items]
Total revenue	2			4			15	4
Depreciation, amortization and accretion	1			0			1	0
Impairment expense				0			2	0
Operating income (loss)	(10)			(1)			(30)	(13)
Earnings (loss) in unconsolidated investments	0			0			0	0
Interest expense	1			0			1	0
Income tax provision	0			1			0	1
Net income (loss)	(11)			(2)			(30)	(14)
Adjusted EBITDA	(10)			(1)			(29)	(13)
Capital expenditures	(54)			(24)			(56)	(31)
Property, plant and equipment, net	86			2			86	2
Unconsolidated investments	10			8			10	8
Total assets	205			151			205	151
Corporate, Other and Eliminations
Segment Reporting Information [Line Items]
Total revenue	3			2			7	7
Depreciation, amortization and accretion	0			4			2	3
Impairment expense				3			0	7
Operating income (loss)	(14)			(13)			(40)	(32)
Earnings (loss) in unconsolidated investments	(12)			(5)			(31)	(17)
Interest expense	13			13			37	35
Income tax provision	0			0			4	8
Net income (loss)	(40)			(30)			(113)	(86)
Adjusted EBITDA	(21)			(6)			(46)	(2)
Capital expenditures	(1)			(3)			(4)	(5)
Property, plant and equipment, net	64			66			64	66
Unconsolidated investments	(15)			26			(15)	26
Total assets	(3,496)			(3,620)			(3,496)	(3,620)
Loss related to portion of loss of Pattern Development	11			2			30	14
Income (Loss) From Equity Method Investments, Portion Attributable To Intra-Entities	1			3			1	3
Reconciling Amounts
Segment Reporting Information [Line Items]
Total revenue	(2)			(4)			(15)	(4)
Depreciation, amortization and accretion	(1)			0			(1)	0
Impairment expense				0			(2)	0
Operating income (loss)	10			1			30	13
Earnings (loss) in unconsolidated investments	0			0			0	0
Interest expense	(1)			0			(1)	0
Income tax provision	0			(1)			0	(1)
Net income (loss)	11			2			30	14
Adjusted EBITDA	10			1			29	13
Capital expenditures	54			24			56	31
Property, plant and equipment, net	(86)			(2)			(86)	(2)
Unconsolidated investments	(10)			(8)			(10)	(8)
Total assets	$ (205)			$ (151)			$ (205)	$ (151)