Discontinued Operations (Schedule Of Operating Results Of Discontinued Operations) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating results of discontinued operations
Revenue		$ 71	$ 63	$ 198	$ 191
Cost of services rendered and products sold		32	27	93	79
Selling and administrative expenses		11	12	34	38
Amortization expense			1	1	3
Restructuring and other charges	[1]	9	1	18	3
Interest and net investment income					(1)
Income before income taxes		18	22	53	69
Provision for income taxes		4	5	13	18
Net earnings from discontinued operations		$ 14	$ 17	$ 40	$ 51
Weighted-average common shares outstanding - Basic		132.0	135.8	132.9	135.9
Weighted-average common shares outstanding - Diluted		132.0	136.5	133.1	136.5
Net earnings from discontinued operations (in dollars per share)		$ 0.11	$ 0.13	$ 0.30	$ 0.38
Net earnings from discontinued operations (in dollars per share)		$ 0.11	$ 0.13	$ 0.30	$ 0.38
Professional fees and other costs incurred		$ 9		$ 18

[1] Includes $9 million and $18 million of professional fees and other costs incurred in connection with the strategic evaluation and ultimate sale in the three and nine months ended September 30, 2020, respectively.