Borrowings (Details)	1 Months Ended							9 Months Ended	12 Months Ended
	Apr. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	May 31, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jun. 30, 2021 USD ($)	Aug. 31, 2019 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jun. 30, 2023	Apr. 12, 2023 USD ($)	Mar. 31, 2022 EUR (€)	Feb. 28, 2021 USD ($)
Debt Instrument [Line Items]
Proceeds from issuance of notes			$ 1,061,000,000
Long-term debt								$ 6,189,000,000	$ 6,796,000,000
Debt covenant, total indebtedness to total capitalization ratio, maximum							0.60
Debt covenant, acquisition for consideration, minimum threshold							$ 1,000,000,000
Debt covenant, total indebtedness to total capitalization ratio, maximum when acquisition for consideration threshold is met, percentage							0.65
Debt instrument, total indebtedness to total capitalization, percentage								0.43
Long-term commercial paper								$ 0	0
Redemption price, percentage			101.00%
Outstanding letters of credit								235,000,000
3.2% Notes Due 2023
Debt Instrument [Line Items]
Repayment of long-term debt				$ 300,000,000
Stated interest percentage												3.20%
2.750% Notes Due 2029
Debt Instrument [Line Items]
Aggregate principal amount			$ 700,000,000
Stated interest percentage			2.75%
1.875% Notes Due 2025
Debt Instrument [Line Items]
Aggregate principal amount			$ 300,000,000
Stated interest percentage			1.875%
Fixed Interest Note
Debt Instrument [Line Items]
Aggregate principal amount | €												€ 50,000,000
Debt instrument term				15 years
Stated interest percentage										1.95%
Term Loan Credit Agreement
Debt Instrument [Line Items]
Aggregate principal amount													$ 2,000,000,000
Proceeds from issuance of notes					$ 700,000,000	$ 700,000,000
Repayment of long-term debt								800,000,000	300,000,000
Long-term debt								300,000,000	1,100,000,000
Term Loan
Debt Instrument [Line Items]
Aggregate principal amount											$ 500,000,000
Term loan, increase limit											$ 250,000,000
Proceeds from issuance of notes	$ 500,000,000
Revolving Credit Facility | Unsecured Debt
Debt Instrument [Line Items]
Long-term debt								$ 0	$ 0
Debt instrument term		5 years
Revolving credit facility outstanding		$ 2,300,000,000
Line of credit facility, additional borrowing capacity available to lender conditions		$ 750,000,000