Fair Value Measurements and Financial Instruments - Fair Value of Derivative Instruments and Other Financial Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Designated derivative instruments
Derivative assets, designated	$ 30	$ 10
Derivative liabilities, designated	61	29
Other financial instruments
Total other financial instruments	80	23
Other current assets
Other financial instruments
Marketable securities	80	23
Other current assets \| Interest rate swap contracts
Designated derivative instruments
Derivative assets, designated	0	0
Other current assets \| Forward-starting interest rate swaps
Designated derivative instruments
Derivative assets, designated	0	0
Other current assets \| Foreign currency contracts
Designated derivative instruments
Derivative assets, designated	14	6
Other current assets \| Commodity contracts
Designated derivative instruments
Derivative assets, designated	1	0
Other assets \| Interest rate swap contracts
Designated derivative instruments
Derivative assets, designated	15	4
Other assets \| Forward-starting interest rate swaps
Designated derivative instruments
Derivative assets, designated	0	0
Other assets \| Foreign currency contracts
Designated derivative instruments
Derivative assets, designated	0	0
Other accruals \| Interest rate swap contracts
Designated derivative instruments
Derivative liabilities, designated	0	0
Other accruals \| Forward-starting interest rate swaps
Designated derivative instruments
Derivative liabilities, designated	0	0
Other accruals \| Foreign currency contracts
Designated derivative instruments
Derivative liabilities, designated	28	15
Other accruals \| Commodity contracts
Designated derivative instruments
Derivative liabilities, designated	0	0
Other liabilities \| Interest rate swap contracts
Designated derivative instruments
Derivative liabilities, designated	0	0
Other liabilities \| Forward-starting interest rate swaps
Designated derivative instruments
Derivative liabilities, designated	4	0
Other liabilities \| Foreign currency contracts
Designated derivative instruments
Derivative liabilities, designated	$ 29	$ 14

Designated derivative instruments [Abstract]

No definition available.

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- Definition

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

+ Details

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- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313

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- References

No definition available.

+ Details

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- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- Definition

Amount of investment in marketable security.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.4)
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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