Retirement Plans and Profit Sharing Arrangements (Amounts recognized in Balance Sheet) (Details 3) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Pension Plans [Member]
Amounts recognized in the Consolidated Balance Sheets
Benefit liability	$ (223)	$ (178)
Benefit asset	19	14
Net amount recognized	(204)	(164)
Other Postretirement Benefit Plan [Member]
Amounts recognized in the Consolidated Balance Sheets
Benefit liability	(18)	(18)
Net amount recognized	$ (18)	$ (18)