Goodwill (Details) - USD ($) $ in Millions	3 Months Ended
Dec. 27, 2019	Sep. 27, 2019
Goodwill:
Goodwill, beginning balance	$ 5,740
Acquisitions	59
Currency translation	47
Goodwill, ending balance	5,846
Transportation Solutions
Goodwill:
Goodwill, beginning balance	2,124
Acquisitions	50
Currency translation	19
Goodwill, ending balance	2,193
Accumulated impairment losses	2,191	$ 2,191
Industrial Solutions
Goodwill:
Goodwill, beginning balance	3,039
Acquisitions	9
Currency translation	24
Goodwill, ending balance	3,072
Accumulated impairment losses	669	669
Communications Solutions
Goodwill:
Goodwill, beginning balance	577
Currency translation	4
Goodwill, ending balance	581
Accumulated impairment losses	$ 489	$ 489

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.

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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.

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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.

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

+ References

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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