Incentive Compensation Plans Employee Stock Purchase Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2015
Employee Stock Ownership Plan (ESOP), Shares in ESOP [Abstract]
Maximum employee subscription rate	10.00%
Maximum number of shares per employee	900
Employee stock purchase plan description	90% of the lesser of the average market price of a share on the first business day of the offering period or the average market price of a share on the last business day of the offering period of three months
Employee Stock Purchase Plan, stock issued, shares	600,000	3,000,000.0
Employee Stock Purchase Plan, stock reserved for issuance, shares	10,000,000.0
Stock Issued During Period, Shares, Employee Stock Ownership Plan	3,100,000
Stock Issued During Period, Value, Employee Stock Purchase Plan	$ 18.7