Earnings per Share - Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator:
Net income attributable to common shareholders - basic	$ 183	$ 179
Add: Net income attributable to noncontrolling interests	86	91
Net income available to common shareholders and noncontrolling interests - diluted	$ 269	$ 270
Denominator:
Weighted average common shares - basic (in shares)	309	306
Exchange of noncontrolling interests for common shares (in shares)	145	155
Effect of other dilutive securities (in shares)	4	4
Weighted average common shares - diluted (in shares)	458	465
Basic earnings per share (in usd per share)	$ 0.59	$ 0.59
Diluted earnings per share (in usd per share)	$ 0.59	$ 0.58
Anti-dilutive securities outstanding (in shares)	4	5