Retirement Plans and Profit Sharing Arrangements (Amounts recognized in Balance Sheet) (Details 3) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Pension Plans [Member]
Amounts recognized in the Consolidated Balance Sheets
Benefit liability	$ (278)	$ (256)
Benefit asset	5	17
Net amount recognized	(273)	(239)
Other Postretirement Benefits Plan [Member]
Amounts recognized in the Consolidated Balance Sheets
Benefit liability	(14)	(14)
Benefit asset	0	0
Net amount recognized	$ (14)	$ (14)