Per Share Information (Reconciliation of the Numerators and Denominators of the Basic and Diluted Per Share Computations) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Income (loss) from continuing operations	$ 421	$ 333	$ 842	$ 455
Net income (loss)	421	334	842	393
Income (loss) from discontinued operations, net of tax	0	1	0	(62)
Net Income (Loss) Available to Common Stockholders, Basic	$ 421	$ 334	$ 842	$ 393
Basic weighted-average number of common stock outstanding	433	432	433	432
Effect of assumed dilution from potential issuance of common shares relating to restricted stock units	1	2	1	2
Diluted weighted-average number of common shares outstanding	434	434	434	434
Income (loss) from continuing operations, per share - basic	$ 0.97	$ 0.77	$ 1.95	$ 1.05
Income (loss) from discontinued operations, per share - basic	0	0	0	(0.14)
Earnings Per Share, Basic	0.97	0.77	1.95	0.91
Income (loss) from continuing operations, per share - diluted	0.97	0.77	1.94	1.04
Income (loss) from discontinued operations, per share - diluted	0	0	0	(0.14)
Earnings Per Share, Diluted	0.97	0.77	1.94	0.90
Dividends/distributions declared per share of common stock (in dollars per share)	$ 1.47	$ 1.33	$ 2.94	$ 2.66