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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, 2025 USD ($)	Sep. 30, 2024	Mar. 31, 2025 EUR (€)	Dec. 31, 2024 USD ($)	Dec. 31, 2024 EUR (€)
Derivative [Line Items]
Derivative, notional amount	$ 8,113			$ 9,090
Maximum Remaining Maturity of Foreign Currency Derivatives	9 years 6 months	9 years 8 months 12 days
Total fair value	$ (2)			148
Other current assets
Derivative [Line Items]
Derivative assets	57			186
Other noncurrent assets
Derivative [Line Items]
Derivative assets	8			39
Other current liabilities
Derivative [Line Items]
Derivative liabilities	(49)			(70)
Other noncurrent liabilities
Derivative [Line Items]
Derivative liabilities	(18)			(7)
Non-Designated
Derivative [Line Items]
Derivative, notional amount	4,060			5,164
Total fair value	(7)			78
Non-Designated \| Other current assets
Derivative [Line Items]
Derivative assets	21			119
Non-Designated \| Other noncurrent assets
Derivative [Line Items]
Derivative assets	0			0
Non-Designated \| Other current liabilities
Derivative [Line Items]
Derivative liabilities	(28)			(41)
Non-Designated \| Other noncurrent liabilities
Derivative [Line Items]
Derivative liabilities	0			0
Cash Flow \| Designated as Hedging Instrument
Derivative [Line Items]
Derivative, notional amount	1,617			1,588
Total fair value	9			15
Cash Flow \| Designated as Hedging Instrument \| Other current assets
Derivative [Line Items]
Derivative assets	25			43
Cash Flow \| Designated as Hedging Instrument \| Other noncurrent assets
Derivative [Line Items]
Derivative assets	1			4
Cash Flow \| Designated as Hedging Instrument \| Other current liabilities
Derivative [Line Items]
Derivative liabilities	(16)			(29)
Cash Flow \| Designated as Hedging Instrument \| Other noncurrent liabilities
Derivative [Line Items]
Derivative liabilities	(1)			(3)
Net Investment \| Designated as Hedging Instrument
Derivative [Line Items]
Derivative, notional amount	2,436		€ 2.3	2,338	€ 2.3
Total fair value	(4)			55
Net Investment \| Designated as Hedging Instrument \| Other current assets
Derivative [Line Items]
Derivative assets	11			24
Net Investment \| Designated as Hedging Instrument \| Other noncurrent assets
Derivative [Line Items]
Derivative assets	7			35
Net Investment \| Designated as Hedging Instrument \| Other current liabilities
Derivative [Line Items]
Derivative liabilities	(5)			0
Net Investment \| Designated as Hedging Instrument \| Other noncurrent liabilities
Derivative [Line Items]
Derivative liabilities	$ (17)			$ (4)