Employee Benefit Plans Measurement Assumptions (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Pension Plan | UNITED STATES
Defined Benefit Plans and Other Postretirement Benefit Plans
Discount Rate Assumptions Used Calculating Benefit Obligation	3.10%	2.90%
Discount Rate Assumptions Used Calculating Net Periodic Benefit Cost	2.90%	3.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.00%	7.00%
Pension Plan | UNITED KINGDOM
Defined Benefit Plans and Other Postretirement Benefit Plans
Discount Rate Assumptions Used Calculating Benefit Obligation	2.00%	1.40%
Rate of Compensation Increase Assumptions Used Calculating Benefit Obligation	2.90%	2.80%
Discount Rate Assumptions Used Calculating Net Periodic Benefit Cost	1.40%	2.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	3.50%	4.10%
Rate of Compensation Increase Assumptions Used Calculating Net Periodic Benefit Cost	2.80%	2.90%
Other Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Discount Rate Assumptions Used Calculating Benefit Obligation	2.90%	2.60%
Discount Rate Assumptions Used Calculating Net Periodic Benefit Cost	2.60%	3.40%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	5.75%	5.75%