Restructuring and Related Charges - Reserve Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 3	$ 0
Charges		362
Cash payments	(2)	(245)
Non-cash adjustments		(114)
Restructuring reserve, ending balance	1	3
Operating lease right-of-use assets	3	94
Severance and Other Termination Benefits
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	2	0
Charges		199
Cash payments	(2)	(197)
Non-cash adjustments		0
Restructuring reserve, ending balance	0	2
Cash settled and to be settled charges		248
Site Closure Costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	0	0
Charges		98
Cash payments	0	(3)
Non-cash adjustments		(95)
Restructuring reserve, ending balance	0	0
Operating lease right-of-use assets		50
Site Closure Costs \| Leasehold improvements
Restructuring Reserve [Roll Forward]
Write-off of the leasehold improvements		38
Other
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	1	0
Charges		65
Cash payments	0	(45)
Non-cash adjustments		(19)
Restructuring reserve, ending balance	$ 1	$ 1

Restructuring Charges Settled and To Be Settled In Cash

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Amount of loss from impairment of right-of-use asset from operating lease.

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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.

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Amount of divestiture of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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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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Amount of decrease in the reserve for full or partial settlement through consideration other than cash.

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