Debt And Financing Arrangements (Narrative) (Details) $ in Millions, € in Billions	3 Months Ended	12 Months Ended
	Mar. 31, 2024 EUR (€)	Dec. 31, 2023 EUR (€)	Mar. 31, 2024 USD ($)
Debt Instrument [Line Items]
Notional Amount of Nonderivative Instruments | €	€ 0.7	€ 0.7
Fair Value of Debt Below Carrying Value			$ 300
Line of Credit [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			12,800
Unused lines of credit			8,800
Commercial Paper [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			5,000
Commercial Paper			900
Accounts Receivable Securitization Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			3,000
Unused lines of credit			$ 700