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Lease Operations (Schedule of Minimum Future Rentals on Non-cancellable Leases) (Details) $ in Millions	Dec. 31, 2018 USD ($)
2018	$ 908
2019	909
2020	777
2021	775
2022	758
2023 and thereafter	3,432
Total minimum future rentals	7,559
Related Party
2018	748
2019	750
2020	627
2021	627
2022	616
2023 and thereafter	2,321
Total minimum future rentals	5,689
Third Party
2018	160
2019	159
2020	150
2021	148
2022	142
2023 and thereafter	1,111
Total minimum future rentals	$ 1,870

X

- Definition

Future minimum rental payments in aggregate as of the balance sheet date under operating leases.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
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- Definition

Future rental payments receivable within one year of the balance sheet date under an operating lease.

+ References

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-Publisher FASB
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-SubTopic 20
-Section 50
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- Definition

Future rental payments receivable within the fifth year from the balance sheet date under an operating lease.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Future rental payments receivable within the fourth year from the balance sheet date under an operating lease.

+ References

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-Publisher FASB
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Future rental payments receivable within the third year from the balance sheet date under an operating lease.

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Future rental payments receivable within the second year from the balance sheet date under an operating lease.

+ References

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- Definition

Future minimum lease payments receivable under operating leases for periods greater than five years following the balance sheet date.

+ References

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