Debt - Interest Expense (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
|
| Debt Disclosure [Abstract] | ||||
| Total interest cost | $ 237 | $ 234 | $ 472 | $ 466 |
| Capitalized interest | (7) | (50) | (55) | (97) |
| Total interest expense, net | $ 230 | $ 184 | $ 417 | $ 369 |
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of interest capitalized during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Total interest costs incurred during the period and either capitalized or charged against earnings. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of the cost of borrowed funds accounted for as interest expense. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|