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Derivative Instruments - Forward Currency Exchange Contracts (Details) - Foreign Exchange Contract $ in Millions, € in Billions	3 Months Ended	9 Months Ended
	Mar. 31, 2026	Sep. 30, 2026 USD ($)	Sep. 30, 2026 EUR (€)	Dec. 31, 2025 USD ($)	Dec. 31, 2025 EUR (€)
Derivative [Line Items]
Derivative, notional amount		$ 7,775		$ 8,776
Foreign Currency Derivative, Maximum Remaining Maturity Period	8 years 8 months 12 days	8 years
Total fair value		$ (31)		(124)
Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent
Derivative [Line Items]
Derivative assets		16		2
Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent
Derivative [Line Items]
Derivative liabilities		(82)		(102)
Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent
Derivative [Line Items]
Derivative liabilities		(16)		(68)
Balance Sheet Location [Axis]: us-gaap:PrepaidExpenseCurrent
Derivative [Line Items]
Derivative assets		51		44
Non-Designated
Derivative [Line Items]
Derivative, notional amount		3,256		4,391
Total fair value		26		(10)
Non-Designated \| Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent
Derivative [Line Items]
Derivative assets		0		0
Non-Designated \| Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent
Derivative [Line Items]
Derivative liabilities		(11)		(21)
Non-Designated \| Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent
Derivative [Line Items]
Derivative liabilities		0		0
Non-Designated \| Balance Sheet Location [Axis]: us-gaap:PrepaidExpenseCurrent
Derivative [Line Items]
Derivative assets		37		11
Cash Flow \| Designated as Hedging Instrument
Derivative [Line Items]
Derivative, notional amount		1,967		1,738
Total fair value		(23)		23
Cash Flow \| Designated as Hedging Instrument \| Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent
Derivative [Line Items]
Derivative assets		2		2
Cash Flow \| Designated as Hedging Instrument \| Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent
Derivative [Line Items]
Derivative liabilities		(36)		(10)
Cash Flow \| Designated as Hedging Instrument \| Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent
Derivative [Line Items]
Derivative liabilities		(3)		(2)
Cash Flow \| Designated as Hedging Instrument \| Balance Sheet Location [Axis]: us-gaap:PrepaidExpenseCurrent
Derivative [Line Items]
Derivative assets		14		33
Net Investment \| Designated as Hedging Instrument
Derivative [Line Items]
Derivative, notional amount		2,552	€ 2.3	2,647	€ 2.3
Total fair value		(34)		(137)
Net Investment \| Designated as Hedging Instrument \| Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent
Derivative [Line Items]
Derivative assets		14		0
Net Investment \| Designated as Hedging Instrument \| Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent
Derivative [Line Items]
Derivative liabilities		(35)		(71)
Net Investment \| Designated as Hedging Instrument \| Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent
Derivative [Line Items]
Derivative liabilities		(13)		(66)
Net Investment \| Designated as Hedging Instrument \| Balance Sheet Location [Axis]: us-gaap:PrepaidExpenseCurrent
Derivative [Line Items]
Derivative assets		$ 0		$ 0