Debt (Narrative) (Details) € in Millions	1 Months Ended						9 Months Ended
	Aug. 31, 2025 USD ($)	Jul. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2025 EUR (€)	May 31, 2025 USD ($)	Feb. 28, 2025 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Debt Instrument [Line Items]
Short-term borrowings							$ 0		$ 0
Carrying value							25,701,000,000		24,926,000,000
Long-term debt issued							1,992,000,000	$ 0
Long-term debt repaid							1,607,000,000	$ 1,121,000,000
Accrued interest on long-term debt							$ 214,000,000		$ 389,000,000
Senior Notes [Member]
Debt Instrument [Line Items]
Long-term debt issued	$ 1,000,000,000					$ 1,000,000,000
Senior Notes [Member] | Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Required purchase price as percentage of aggregate principal amount							101.00%
Senior Notes [Member] | USD Notes, 2.350%, Maturing May 2025 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage					2.35%
Long-term debt repaid					$ 750,000,000
Senior Notes [Member] | USD Notes, 1.700%, Maturing June 2025 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage			1.70%	1.70%
Long-term debt repaid			$ 857,000,000	€ 750
Senior Notes [Member] | USD Notes, 4.500% [Member]
Debt Instrument [Line Items]
Face amount	$ 500,000,000
Debt instrument, interest rate, stated percentage	4.50%
Senior Notes [Member] | USD Notes, 5.250% [Member]
Debt Instrument [Line Items]
Face amount	$ 500,000,000
Debt instrument, interest rate, stated percentage	5.25%
Senior Notes [Member] | USD Notes, 4.875% [Member]
Debt Instrument [Line Items]
Face amount						$ 500,000,000
Debt instrument, interest rate, stated percentage						4.875%
Senior Notes [Member] | USD Notes, 5.625% [Member]
Debt Instrument [Line Items]
Face amount						$ 500,000,000
Debt instrument, interest rate, stated percentage						5.625%
Revolving Credit Facility [Member] | Line of Credit [Member] | Revolving Credit Facility Due October 24, 2029 [Member]
Debt Instrument [Line Items]
Face amount		$ 3,000,000,000.0					$ 3,000,000,000.0
Long-term debt, term		5 years
Line of credit facility, additional period term		1 year
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]							Secured Overnight Financing Rate (SOFR) [Member]
Debt instrument, basis spread on variable rate							1.00%
Debt instrument, covenant, consolidated EBITDA to interest expense ratio, minimum							4.0