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Restructuring Activities - Summary of Restructuring Reserves and Related Activities (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 23	$ 31	$ 49
Expense	0	2	0
Change in estimate	(2)	(1)	(1)
Utilization	(4)	(9)	(16)
Foreign currency	0	0	(1)
Restructuring reserve, ending balance	$ 17	$ 23	$ 31

X

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

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-Publisher FASB
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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

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X

- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

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- Definition

Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability.

+ 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.

+ References

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Amount of foreign currency translation gain (loss) which decreases (increases) the restructuring reserve.

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