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Leases Lessee Disclosure - Lease Costs (Details) - USD ($) $ in Millions		3 Months Ended	9 Months Ended
		Sep. 30, 2019	Sep. 30, 2019
Lease Costs
Operating lease costs		$ 42	$ 125
Amortization of leased assets		3	10
Interest on lease liabilities		0	1
Other lease costs (a)	[1]	9	22
Impairment loss		3	5
Less: Sublease income, gross		1	2
Net lease cost		$ 56	$ 161
[1] Primarily consists of variable lease costs.

X

- Definition

Amount of interest expense on finance lease liability.

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

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Amount of lease cost recognized by lessee for lease contract.

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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.

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

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