Goodwill and Acquired Intangible Assets (Finite-Lived Intangible Assets Amortization Expense) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Intangible Asset, Goodwill and Other [Abstract]
Amortization expense	$ 121	$ 122	$ 364	$ 365

Amount of amortization expense for finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed.

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+ Details