Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator for Basic and Diluted Earnings per Share - [Abstract]
Net Income (Loss)	$ 4,664	$ (605)	$ 2,735
Denominator for Basic Earnings per Share - [Abstract]
Weighted Average Shares	581	579	578
Denominator for Diluted Earnings per Share - [Abstract]
Adjusted Diluted Weighted Average Shares	584	579	581
Antidilutive Securities Excluded from Computation of Earnings Per Share [Abstract]
Anti-dilutive Securities excluded from Diluted Earnings Per Share Calculation	6	10	6
Net Income (Loss) Per Share [Abstract]
Basic	$ 8.03	$ (1.04)	$ 4.73
Diluted	$ 7.99	$ (1.04)	$ 4.71
Stock Options and Sars [Member]
Potential Dilutive Common Shares -[Abstract]
Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangments	0	0	0
Restricted Stock/Units and Performance Units/Stock [Member]
Potential Dilutive Common Shares -[Abstract]
Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangments	3	0	3
Antidilutive Securities Excluded from Computation of Earnings Per Share [Abstract]
Anti-dilutive Securities excluded from Diluted Earnings Per Share Calculation		5