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Employee Benefit Plans US Pension Assets, Fair Value Measurement by Input Level (Details) - UNITED STATES - Pension Plan - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets $ 1,801.7 $ 1,710.9 $ 1,600.0
U.S. Large Cap      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 144.9 112.6  
U.S. Large Cap | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
U.S. Large Cap | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
U.S. Large Cap | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
U.S. Large Cap | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 144.9 112.6  
U.S. Small Cap      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 63.3 59.0  
U.S. Small Cap | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 32.8 25.8  
U.S. Small Cap | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
U.S. Small Cap | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
U.S. Small Cap | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 30.5 33.2  
Global      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 388.7 307.9  
Global | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Global | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Global | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Global | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 388.7 307.9  
International      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets   31.6  
International | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets   0.0  
International | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets   0.0  
International | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets   0.0  
International | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets   31.6  
Emerging Markets      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 59.8 62.3  
Emerging Markets | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Emerging Markets | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Emerging Markets | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Emerging Markets | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 59.8 62.3  
U.S. Government and Agencies      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 419.3 227.8  
U.S. Government and Agencies | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 419.3 227.8  
U.S. Government and Agencies | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
U.S. Government and Agencies | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
U.S. Government and Agencies | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Corporate      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 103.3 445.6  
Corporate | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Corporate | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 445.6  
Corporate | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Corporate | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 103.3 0.0  
States, Municipalities, and Political Subdivisions      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets   3.7  
States, Municipalities, and Political Subdivisions | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets   0.0  
States, Municipalities, and Political Subdivisions | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets   3.7  
States, Municipalities, and Political Subdivisions | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets   0.0  
States, Municipalities, and Political Subdivisions | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets   0.0  
Opportunistic Credits      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 212.5 200.4  
Opportunistic Credits | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Opportunistic Credits | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Opportunistic Credits | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Opportunistic Credits | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 212.5 200.4  
Real Estate      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 132.1 108.9  
Real Estate | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Real Estate | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Real Estate | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Real Estate | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 132.1 108.9  
Private Equity Direct Investments      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 80.4 62.1  
Private Equity Direct Investments | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Private Equity Direct Investments | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Private Equity Direct Investments | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Private Equity Direct Investments | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 80.4 62.1  
Private Equity Funds of Funds      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 50.5 39.2  
Private Equity Funds of Funds | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Private Equity Funds of Funds | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Private Equity Funds of Funds | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Private Equity Funds of Funds | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 50.5 39.2  
Cash Equivalents      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 146.9 46.3  
Cash Equivalents | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 146.9 46.3  
Cash Equivalents | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Cash Equivalents | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Cash Equivalents | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Total Invested Assets      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 1,801.7 1,707.4  
Total Invested Assets | Fair Value, Inputs, Level 1      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 599.0 299.9  
Total Invested Assets | Fair Value, Inputs, Level 2      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 449.3  
Total Invested Assets | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 0.0 0.0  
Total Invested Assets | Fair Value Measured at Net Asset Value Per Share      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets $ 1,202.7 $ 958.2