Organization and Basis of Presentation (Consolidated Variable Interest Entities) (Details) - USD ($) $ in Millions	5 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2018
ASSETS
Cash and cash equivalents	$ 76	$ 76	$ 71
Restricted cash	0	0	5
Accounts receivable	1,453	1,453	1,789
Property, plant, and equipment, net	23,758	23,758	21,650
Goodwill	2,293	2,293	2,293
Intangible assets	919	919	828
Total Assets	38,345	38,345	36,288
Variable interest entity, primary beneficiary, restricted
ASSETS
Cash and cash equivalents	32	32	39
Restricted cash	0	0	5
Accounts receivable	37	37	46
Inventories	97	97	93
Property, plant, and equipment, net	442	442	441
Goodwill	25	25	25
Intangible assets	546	546	557
Other current and long-term assets	1	1	3
Total Assets	1,180	1,180	1,209
LIABILITIES
Accounts payable and accrued current liabilities	23	23	34
Other current and long-term liabilities	13	13	19
Total liabilities	36	36	53
SGG
ASSETS
Cash and cash equivalents	20	20	25
Restricted cash	0	0	0
Accounts receivable	10	10	9
Inventories	0	0	1
Property, plant, and equipment, net	406	406	395
Goodwill	25	25	25
Intangible assets	546	546	557
Other current and long-term assets	1	1	3
Total Assets	1,008	1,008	1,015
LIABILITIES
Accounts payable and accrued current liabilities	5	5	3
Other current and long-term liabilities	6	6	9
Total liabilities	$ 11	$ 11	$ 12
VIE ownership and non-ownership percentage		100.00%
VIE ownership percentage	85.00%		55.00%
Other
ASSETS
Cash and cash equivalents	$ 12	$ 12	$ 14
Restricted cash	0	0	5
Accounts receivable	27	27	37
Inventories	97	97	92
Property, plant, and equipment, net	36	36	46
Goodwill	0	0	0
Intangible assets	0	0	0
Other current and long-term assets	0	0	0
Total Assets	172	172	194
LIABILITIES
Accounts payable and accrued current liabilities	18	18	31
Other current and long-term liabilities	7	7	10
Total liabilities	$ 25	$ 25	$ 41