Leases - Subleases (Details) $ in Millions |
3 Months Ended | 6 Months Ended |
|---|---|---|
|
Jun. 30, 2019
USD ($)
|
Jun. 30, 2019
USD ($)
|
|
| Leases [Abstract] | ||
| Sublease Payments Receivable in 2019 | $ 13 | $ 13 |
| Sublease Income, Total | 31 | 68 |
| Sublease Income, Variable | $ 5 | $ 10 |
| X | ||||||||||
- Definition Amount of lease income from operating, direct financing, and sales-type leases. Includes, but is not limited to, variable lease payments, interest income, profit (loss) recognized at commencement, and lease payments paid and payable to lessor. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of lease payments to be received by lessor in remainder of fiscal year following latest fiscal year for operating lease. Excludes interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of variable lease payments from operating, direct financing, and sales-type leases, excluding amount included in measurement of lease receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|