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Goodwill and Acquired Intangible Assets (Finite-Lived and Indefinite-Lived Intangible Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 2,160	$ 2,262
Accumulated Amortization	(772)	(695)
Net Amount	1,388	1,567
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	1,193	1,246
Intangible assets, net	2,581	2,813
Exchange and clearing registrations
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	1,257	1,257
Trade names
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	121	121
Licenses
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	52	52
Foreign currency translation adjustment
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets	(237)	(184)
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Amount	304	295
Accumulated Amortization	(97)	(54)
Net Amount	207	241
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Amount	2,005	2,050
Accumulated Amortization	(778)	(711)
Net Amount	1,227	1,339
Trade names and other
Finite-Lived Intangible Assets [Line Items]
Gross Amount	60	60
Accumulated Amortization	(17)	(11)
Net Amount	43	49
Foreign currency translation adjustment
Finite-Lived Intangible Assets [Line Items]
Gross Amount	(209)	(143)
Accumulated Amortization	120	81
Net Amount	$ (89)	$ (62)

X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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