Financial Instruments (Schedule of Short-term and Long-term Classification) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Short-term commercial paper borrowings	$ (6,189.4)	$ (1,498.0)
Long-term debt, including current portion	(19,104.6)	(14,815.3)
Carrying Amount
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-term debt, including current portion	(19,035.9)	(14,740.6)
Carrying Amount | Commercial Paper
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Short-term commercial paper borrowings	(6,189.4)	(1,498.0)
Estimate of Fair Value Measurement
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-term debt, including current portion	(17,221.7)	(12,329.3)
Estimate of Fair Value Measurement | Commercial Paper
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Short-term commercial paper borrowings	(6,166.4)	(1,492.0)
Quoted Prices in Active Markets for Identical Assets (Level 1) | Estimate of Fair Value Measurement
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-term debt, including current portion	0.0	0.0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Estimate of Fair Value Measurement | Commercial Paper
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Short-term commercial paper borrowings	0.0	0.0
Significant Other Observable Inputs (Level 2) | Estimate of Fair Value Measurement
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-term debt, including current portion	(17,221.7)	(12,329.3)
Significant Other Observable Inputs (Level 2) | Estimate of Fair Value Measurement | Commercial Paper
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Short-term commercial paper borrowings	(6,166.4)	(1,492.0)
Significant Unobservable Inputs (Level 3) | Estimate of Fair Value Measurement
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-term debt, including current portion	0.0	0.0
Significant Unobservable Inputs (Level 3) | Estimate of Fair Value Measurement | Commercial Paper
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Short-term commercial paper borrowings	$ 0.0	$ 0.0