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Goodwill and Intangible Assets - Goodwill (Details) $ in Millions	9 Months Ended
	Sep. 30, 2021 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 6,109
Acquisitions	180
Measurement period adjustment	181
Foreign currency translation adjustment	(23)
Goodwill, ending balance	6,447
Mobility
Goodwill [Roll Forward]
Goodwill, beginning balance	2,562
Acquisitions	127
Measurement period adjustment	(2)
Foreign currency translation adjustment	(18)
Goodwill, ending balance	2,669
Delivery
Goodwill [Roll Forward]
Goodwill, beginning balance	3,547
Acquisitions	53
Measurement period adjustment	183
Foreign currency translation adjustment	(5)
Goodwill, ending balance	3,778
Freight
Goodwill [Roll Forward]
Goodwill, beginning balance	0
Acquisitions	0
Measurement period adjustment	0
Foreign currency translation adjustment	0
Goodwill, ending balance	$ 0

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(1))
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-Publisher FASB
-Name Accounting Standards Codification
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-Section 55
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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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-Publisher FASB
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-SubTopic 20
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-Paragraph 1
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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
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- Definition

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+ References

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