Financial Instruments (Schedule of Short-term and Long-term Classification) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Carrying Amount
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-Term Debt	$ (18,820.0)	$ (14,740.6)
Carrying Amount | Commercial Paper
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Short-term commercial paper borrowings	0.0	(1,498.0)
Estimate of Fair Value Measurement
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-Term Debt	(16,589.9)	(12,329.3)
Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-Term Debt	0.0	0.0
Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-Term Debt	(16,589.9)	(12,329.3)
Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-Term Debt	0.0	0.0
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	(1,492.0)
Estimate of Fair Value Measurement | Commercial Paper | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Short-term commercial paper borrowings	0.0	0.0
Estimate of Fair Value Measurement | Commercial Paper | Significant Other Observable Inputs (Level 2)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Short-term commercial paper borrowings	0.0	(1,492.0)
Estimate of Fair Value Measurement | Commercial Paper | Significant Unobservable Inputs (Level 3)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Short-term commercial paper borrowings	$ 0.0	$ 0.0