Fair Value Measurements (Fair Value Of Notes Payable) (Details) - USD ($)	Jun. 30, 2026	Dec. 31, 2025
Carrying Value	$ 4,848,300,000	$ 3,900,800,000
Fixed rate notes payable
Carrying Value	3,350,300,000	2,766,900,000
Estimated Fair Value	3,178,000,000	2,629,600,000
Floating rate notes payable (1)
Carrying Value	1,500,000,000	1,100,000,000
Estimated Fair Value	1,496,900,000	1,140,900,000
Floating Rate Notes Payable CV
Carrying Value	$ 1,498,000,000	$ 1,133,900,000

Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.