Schedule I - Condensed Financial Information of Registrant - Condensed Statements of Operations (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 |
|
| Other income (expense) | |||||||||||
| Interest expense, net | $ (875) | $ (747) | $ (488) | ||||||||
| Total other income (expense) | (797) | (822) | (633) | ||||||||
| Net income (loss) attributable to common stockholders | $ 67 | $ 65 | $ (18) | $ 357 | $ 127 | $ (289) | $ (285) | $ 54 | 471 | (393) | (610) |
| Parent Company [Member] | |||||||||||
| Condensed Income Statements, Captions [Line Items] | |||||||||||
| General and administrative expense | 8 | 7 | 6 | ||||||||
| Other income (expense) | |||||||||||
| Interest expense, net | (128) | (118) | (104) | ||||||||
| Interest expense, net—affiliates | 0 | 0 | (7) | ||||||||
| Interest income—affiliates | 0 | 0 | 24 | ||||||||
| Equity income (loss) of affiliates | 607 | (268) | (517) | ||||||||
| Total other income (expense) | 479 | (386) | (604) | ||||||||
| Net income (loss) attributable to common stockholders | $ 471 | $ (393) | $ (610) | ||||||||
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of the cost of borrowed funds accounted for as interest expense. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of interest expense incurred on a debt or other obligation to related party. No definition available.
|
| X | ||||||||||
- Definition Amount of interest income earned from interest-bearing assets owed to the entity by related party. No definition available.
|
| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Details
|