Retirement Benefits - Pension Plan Weighted Average Asset Allocations (Details) - Pension Benefits	Dec. 31, 2021	Dec. 31, 2020
U.S. Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan securities	100.00%	100.00%
U.S. Plans | Equity Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan securities	4.00%	7.00%
U.S. Plans | Fixed Income Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan securities	33.00%	65.00%
U.S. Plans | Cash/Commingled Funds/Other
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan securities	63.00%	28.00%
Non-U.S. Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan securities	100.00%	100.00%
Non-U.S. Plans | Equity Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan securities	18.00%	17.00%
Non-U.S. Plans | Fixed Income Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan securities	22.00%	24.00%
Non-U.S. Plans | Cash/Commingled Funds/Other
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan securities	60.00%	59.00%