Restructuring And Transaction Costs (Schedule Of The Components Of Restructuring And Transaction Costs Included In The Consolidated Comprehensive Statements Of Earnings) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost And Reserve [Line Items]
Restructuring and transaction costs	$ 267	$ 78	$ 46
Employee Related Costs [Member] | Reduction of workforce [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and transaction costs	227	$ 24
Lease Obligations [Member] | Reduction of workforce [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and transaction costs	20
Asset Impairments [Member] | Reduction of workforce [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and transaction costs	3
Transaction Costs [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring and transaction costs	$ 17