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Leases (Tables) | 3 Months Ended
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Mar. 31, 2019
Leases [Abstract] |
Future Minimum Lease Payments to be Made Under Non-Cancelable Operating Leases Along with Lease and Sublease Minimum Receipts to be Received on Owned and Leased Properties | The table below presents the future minimum lease payments to be made under non-cancelable operating leases as of December 31, 2018:
Year Ended December 31 |  |  |
(In millions) |  |  |
2019 |  | $ | 75 |
2020 |  |  | 79 |
2021 |  |  | 79 |
2022 |  |  | 68 |
2023 |  |  | 57 |
Thereafter |  |  | 344 |
Total |  | $ | 702 |
Lessee Lease Liability Maturity [Table Text Block] | The table below presents the maturities of lease liabilities:
|  | Operating |
As of March 31, 2019 |  | Leases |
(In millions) |  |  |
2019 (a) |  | $ | 82 |
2020 |  |  | 108 |
2021 |  |  | 105 |
2022 |  |  | 95 |
2023 |  |  | 83 |
Thereafter |  |  | 406 |
Total |  |  | 879 |
Less: discount |  |  | 174 |
Total lease liabilities |  | $ | 705 |
(a) | For the nine-month period beginning April 1, 2019
Schedule of other information related to leases [Table Text Block] | The table below presents the weighted average remaining lease term for operating leases and weighted average discount rate used in calculating the operating lease asset and liability.
As of March 31, 2019 |  |
Weighted average remaining lease term |  | 8.4 Years
Weighted average discount rate |  | 4.9 %

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