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Supplementary Information (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018
Supplementary Information
Restructuring charges, after tax	$ 12	$ 22	$ 7	$ 3	$ 16	$ 27	$ 5	$ 3
Acquisition/integration costs, after tax	1			$ 1
Other tax matters, after tax	$ 13	$ 2
(Gain) loss on income tax settlement						(2)	$ 2
Incremental tax expense related to TCJA					$ 1	$ 2

X

- Definition

The amount after tax of acquisition or integration related costs incurred during the period.

+ References

No definition available.

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- Definition

The amount of other income net of tax related to other matters incurred during period.

+ References

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+ Details

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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan, net of tax.

+ References

No definition available.

+ Details

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- Definition

Amount of incremental income tax expense (benefit) recognized in finalizing effect of Tax Cuts and Jobs Act of 2017.

+ References

No definition available.

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- Definition

Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 25
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=117330534&loc=d3e28511-109314

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 25
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=117330534&loc=d3e28446-109314

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