Share-Based Compensation And Other Compensation Arrangements (Schedule Of Stock Option Activity) (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Shares, Outstanding at beginning of year | shares	18,504,645
Shares, Exercised | shares	(5,369,947)
Shares, Forfeited | shares	(206,433)
Shares, Expired | shares	(2,321)
Shares, Outstanding at end of year | shares	12,925,944
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price Per Share, Outstanding at beginning of year | $ / shares	$ 73.75
Weighted Average Exercise Price Per Share, Exercised | $ / shares	74.40
Weighted Average Exercise Price Per Share, Forfeited | $ / shares	76.14
Weighted Average Exercise Price Per Share, Expired | $ / shares	77.95
Weighted Average Exercise Price Per Share, Outstanding at end of year | $ / shares	$ 73.44
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted Average Remaining Contractual Life (Years), Outstanding at end of year	5 years 2 months 24 days
Aggregate Intrinsic Value, Outstanding at end of year | $	$ 920
Shares, Exercisable at end of year | shares	11,249,575
Weighted Average Exercise Price Per Share, Exercisable at end of year | $ / shares	$ 72.94
Weighted Average Remaining Contractual Life (Years), Exercisable at end of year	4 years 11 months 4 days
Aggregate Intrinsic Value, Exercisable at end of year | $	$ 806