Other Comprehensive Earnings (Loss) (Components Of Other Comprehensive Earnings (Loss)) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Foreign currency translation:
Beginning accumulated foreign currency translation and other			$ 1,159
Change in cumulative translation adjustment			35
Ending accumulated foreign currency translation and other			1,194
Pension and postretirement benefit plans:
Beginning accumulated pension and postretirement benefits		$ (119)	(132)
Recognition of net actuarial loss and prior service cost in earnings	[1]	2	3
Income tax expense		(1)	(1)
Ending accumulated pension and postretirement benefits		(118)	(130)
Accumulated other comprehensive earnings (loss), net of tax		$ (118)	$ 1,064	$ (119)

[1] These accumulated other comprehensive earnings components are included in the computation of net periodic benefit cost, which is a component of other expenses in the accompanying consolidated statements of comprehensive earnings.