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Earnings Per Share - Computation of Basic Earnings Per Share, Assuming Dilution (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Numerator:
Net Earnings	$ 834	$ 695
Denominator:
Average Common Shares Outstanding (in shares)	814	885
Other Potentially Dilutive Common Shares (in shares)	3	3
Average Common Shares Outstanding, Assuming Dilution (in shares)	817	888
Net Earnings Per Share, Basic (in dollars per share)	$ 1.02	$ 0.78
Net Earnings Per Share, Assuming Dilution (in dollars per share)	$ 1.02	$ 0.78

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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