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Rental Income under Operating Leases | 12 Months Ended
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Dec. 31, 2017
Rental Income Under Operating Leases [Abstract] |
Rental Income under Operating Leases | Rental Income under Operating Leases The balances of property and equipment that are being leased to third parties for rental income were as follows:
| December 31, 2017 |  | December 31, 2016
| (in millions)
Land | $ | 354 |  |  | $ | 303 |
Buildings and improvements | 254 |  |  | 224 |
Equipment | 53 |  |  | 137 |
Total property and equipment | 661 |  |  | 664 |
Less: accumulated depreciation | (90 | ) |  | (121 | )
Property and equipment, net | $ | 571 |  |  | $ | 543 |
Rental income for the years ended December 31, 2017, December 31, 2016, and December 31, 2015 was $89 million, $88 million and $81 million, respectively. Minimum future rental income under non-cancelable operating leases as of December 31, 2017 is as follows (in millions):
2018 | $ | 56 |
2019 | 41 |
2020 | 23 |
2021 | 11 |
2022 | 7 |
Thereafter | 6 |
Total minimum future rentals | $ | 144 |

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