Borrowings (Details)		1 Months Ended						3 Months Ended			6 Months Ended
	Aug. 30, 2019 USD ($)	Apr. 30, 2023 USD ($)	May 31, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jun. 30, 2021 USD ($)	Aug. 31, 2019 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2021 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Apr. 12, 2023 USD ($)	Dec. 31, 2022 USD ($)	Mar. 31, 2022 EUR (€)	Feb. 28, 2021 USD ($)
Debt Instrument [Line Items]
Repayment of long-term debt											$ 300,000,000	$ 0
Redemption price, percentage			101.00%
Proceeds from issuance of notes			$ 1,061,000,000
Long-term debt								$ 6,892,000,000			$ 6,892,000,000			$ 6,796,000,000
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											0.46
Long-term commercial paper								100,000,000			$ 100,000,000			0
Outstanding letters of credit								228,000,000			228,000,000
Debt covenant, total indebtedness to total capitalization ratio, maximum							0.60
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]
Stated interest percentage			2.75%
Aggregate principal amount			$ 700,000,000
1.875% Notes Due 2025
Debt Instrument [Line Items]
Stated interest percentage			1.875%
Aggregate principal amount			$ 300,000,000
Fixed Interest Note
Debt Instrument [Line Items]
Stated interest percentage									1.95%
Aggregate principal amount | €															€ 50,000,000
Debt instrument term				15 years
Term Loan Credit Agreement
Debt Instrument [Line Items]
Repayment of long-term debt								200,000,000	$ 100,000,000	$ 300,000,000
Aggregate principal amount																$ 2,000,000,000
Proceeds from issuance of notes					$ 700,000,000	$ 700,000,000
Long-term debt								800,000,000			800,000,000			1,100,000,000
Term Loan
Debt Instrument [Line Items]
Aggregate principal amount													$ 500,000,000
Proceeds from issuance of notes		$ 500,000,000
Term loan, increase limit													$ 250,000,000
Revolving Credit Facility | Unsecured Debt
Debt Instrument [Line Items]
Debt instrument term							5 years
Long-term debt								$ 0			$ 0			$ 0
Revolving credit facility outstanding							$ 2,200,000,000
Line of credit facility, additional borrowing capacity available to lender conditions							$ 750,000,000