Retirement Benefits (Schedule of Estimated Amounts That Will Be Amortized from Accumulated Other Comprehensive in the Next Fiscal Year) (Details) $ in Millions	Dec. 31, 2019 USD ($)
U.S. | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ 72
U.S. | Post-retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	1
Non-U.S. | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Prior service credit	0
Net actuarial loss	90
Projected cost	90
Non-U.S. | Post-retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Prior service credit	(2)
Net actuarial loss	0
Projected cost	$ (2)