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Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Numerator for Basic and Diluted Earnings Per Share - [Abstract]
Net Income	$ 677	$ 10
Denominator for Basic Earnings Per Share - [Abstract]
Weighted Average Shares	580	578
Denominator for Diluted Earnings Per Share - [Abstract]
Adjusted Diluted Weighted Average Shares	583	580
Net Income Per Share
Basic	$ 1.17	$ 0.02
Diluted	$ 1.16	$ 0.02
Stock Options, SARs and ESPP [Member]
Potential Dilutive Common Shares - [Abstract]
Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangments	1	0
Net Income Per Share
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	8	9
Restricted Stock/Units and Performance Units/Stock
Potential Dilutive Common Shares - [Abstract]
Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangments	2	2

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