Employee Benefit Plans US Pension Assets, Fair Value Measurement by Input Level (Details) - UNITED STATES - Pension Plan - USD ($) $ in Millions		Dec. 31, 2024	Dec. 31, 2023
Equity Funds
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		$ 424.8	$ 445.8
Equity Funds | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		52.5	55.0
Equity Funds | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Equity Funds | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Equity Funds | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		372.3	390.8
U.S. Government and Agencies
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	[1]	218.4	256.7
U.S. Government and Agencies | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	[1]	234.5	215.9
U.S. Government and Agencies | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	[1]	(16.1)	40.8
U.S. Government and Agencies | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	[1]	0.0	0.0
U.S. Government and Agencies | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	[1]	0.0	0.0
Corporate
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		124.1	130.0
Corporate | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Corporate | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Corporate | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Corporate | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		124.1	130.0
Non-U.S. Emerging Markets
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		32.4	27.9
Non-U.S. Emerging Markets | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Non-U.S. Emerging Markets | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Non-U.S. Emerging Markets | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Non-U.S. Emerging Markets | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		32.4	27.9
Opportunistic Credits
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		139.6	150.6
Opportunistic Credits | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Opportunistic Credits | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Opportunistic Credits | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Opportunistic Credits | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		139.6	150.6
Real Estate
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		166.1	162.8
Real Estate | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Real Estate | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Real Estate | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Real Estate | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		166.1	162.8
Private Equity Direct Investments
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		63.1	68.5
Private Equity Direct Investments | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Private Equity Direct Investments | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Private Equity Direct Investments | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Private Equity Direct Investments | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		63.1	68.5
Private Equity Funds of Funds
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		35.2	40.7
Private Equity Funds of Funds | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Private Equity Funds of Funds | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Private Equity Funds of Funds | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Private Equity Funds of Funds | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		35.2	40.7
Cash Equivalents
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		17.2	16.0
Cash Equivalents | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		17.2	16.0
Cash Equivalents | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Cash Equivalents | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Cash Equivalents | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Total Invested Assets
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		1,220.9	1,299.0
Total Invested Assets | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		304.2	286.9
Total Invested Assets | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		(16.1)	40.8
Total Invested Assets | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0	0.0
Total Invested Assets | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		$ 932.8	$ 971.3

[1] 1 U.S. Government and Agencies Fixed Income Securities includes derivative liabilities.