Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Unrecognized net actuarial losses exceed higher of market value of plan assets or the projected benefit obligation at the beginning of the year	10.00%
Accumulated benefit obligation	$ 1,360.0	$ 1,310.0
Defined benefit plan, ultimate health care cost trend rate	6.90%
Defined benefit plan, ultimate health care cost trend rate, projected	4.00%
Total employer contributions	$ 129.3	$ 111.5	$ 107.4
Fiscal Year 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, ultimate health care cost trend rate	8.60%
Defined benefit plan, ultimate health care cost trend rate, projected	4.00%
Deferred Base Salary
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, maximum annual contribution per employee, percent	50.00%
Deferred Bonus
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, maximum annual contribution per employee, percent	100.00%