Number of options to renew for finance leases.

No definition available.

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- Definition

Number of options to renew for operating leases.

+ References

No definition available.

+ Details

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- Definition

Indicates (true false) whether practical expedient is elected to use hindsight in determining lease term and in assessing impairment of right-of-use asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details

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- Definition

Indicates (true false) whether practical expedients are elected for not reassessing whether any expired or existing contract is or contains lease, lease classification for expired or existing lease, and initial direct cost for any existing lease.

+ References

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-Publisher FASB
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- Definition

Indicates (true false) whether lessee has option to extend finance lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
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+ Details

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- Definition

Term of lessee's finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Indicates (true false) whether lessee has option to extend operating lease.

+ References

+ Details

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- Definition

Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

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-Publisher FASB
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+ Details

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Balance Type:	credit
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- Definition

Amount of lessee's right to use underlying asset under operating lease.

+ References

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- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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Leases (Details) $ in Millions	3 Months Ended
Leases (Details) $ in Millions	Mar. 31, 2019 USD ($) approach	Jan. 31, 2019 USD ($)	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
Leases
Stockholders' equity	$ 9,703			$ 9,796
Number of options to renew for operating leases \| approach	1
Number of options to renew for finance leases \| approach	1
Operating leases, existence of option to extend	true
Finance leases, existence of option to extend	true
Lease liabilities	$ 786
Operating lease right of use assets	$ 797
Lease, Practical Expedients, Package [true false]	true
Lease, Practical Expedient, Use of Hindsight [true false]	false
Maximum
Leases
Operating lease, term	5 years
Finance lease, term	5 years
Adjustment \| ASU 2016-02 Leases
Leases
Lease liabilities			$ 800
Operating lease right of use assets		$ 800	800
Retained Earnings \| Adjustment \| ASU 2016-02 Leases
Leases
Stockholders' equity			$ 14