Debt (Narrative) (Details)	1 Months Ended		3 Months Ended
	Feb. 28, 2024 USD ($)	Jan. 31, 2024 USD ($)	Mar. 31, 2024 USD ($) period	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Short-term borrowings			$ 0		$ 0
Carrying value			25,042,000,000		26,233,000,000
Long-term debt repaid			1,121,000,000	$ 1,348,000,000
Accrued interest on long-term debt			248,000,000		$ 410,000,000
Senior Notes [Member] | USD Notes, 4.000%, Maturing January 2024
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		4.00%
Long-term debt repaid		$ 776,000,000
Senior Notes [Member] | USD Notes, 3.800%, Maturing Feburary 2024
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	3.80%
Long-term debt repaid	$ 345,000,000
Revolving Credit Facility [Member] | Line of Credit [Member] | Revolving Credit Facility Due October 24, 2028 [Member]
Debt Instrument [Line Items]
Face amount			$ 3,000,000,000
Long-term debt, term			5 years
Line of credit facility, number of additional periods | period			2
Line of credit facility, additional period term			1 year
Debt instrument, covenant, consolidated EBITDA to interest expense ratio, minimum			4.0
Term Secured Overnight Financing Rate ("Term SOFR") [Member] | Revolving Credit Facility [Member] | Line of Credit [Member] | Revolving Credit Facility Due October 24, 2028 [Member]
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate			1.00%