Leases - Components of Lease Expense and Gain Realized on Sales Leaseback Transactions (Details) $ in Millions	12 Months Ended
Dec. 31, 2019 USD ($)
Leases [Abstract]
Operating lease cost	$ 696
Short-term lease cost	144
Variable lease cost	90
Total operating lease cost	930
Amortization of leased assets	53
Interest on lease liabilities	7
Total finance lease cost	60
Total lease cost	990
Gain recognized on sale-leaseback transactions	99
Cash proceeds from sale-leaseback transactions	$ 203

Amount of interest expense on finance lease liability.

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- Definition

Amount of amortization expense attributable to right-of-use asset from finance lease.

+ References

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- Definition

Amount of lease cost recognized by lessee for lease contract.

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- References

No definition available.

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

+ References

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- Definition

Amount of gain (loss) on sale and leaseback transaction from transfer of asset accounted for as sale.

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Amount of short-term lease cost, excluding expense for lease with term of one month or less.

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- Definition

Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

+ References

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- Definition

Finance Lease, Cost, Total

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No definition available.

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Operating Lease, Cost, Total

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No definition available.

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- Definition

Proceeds From Sale-Leaseback Transactions

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