Condensed Consolidated Statement of Shareholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Total	Common Shares	Retained Earnings	Accumulated Other Comprehensive Income	Deferred Equity Compensation	Nonredeemable Noncontrolling Interests
Beginning balance (in shares) at Dec. 31, 2020			77,546,896
Beginning balance at Dec. 31, 2020	$ 6,684	$ 6,643	$ 1	$ 6,143	$ 498	$ 1	$ 41
Increase (Decrease) in Shareholders' Equity
Net income	117	109		109			8
Dividends	(34)	(34)		(34)
Contributions	9						9
Common share repurchases (in shares)			(3,874,065)
Common shares repurchases	(165)	(165)		(165)
Shared based compensation (in shares)			439,723
Share-based compensation	3	3		3
Distributions	(9)						(9)
Other comprehensive income (loss)	(53)	(53)			(53)
Ending balance (in shares) at Jun. 30, 2021			74,112,554
Ending balance at Jun. 30, 2021	6,552	6,503	$ 1	6,056	445	1	49
Beginning balance (in shares) at Mar. 31, 2021			75,935,382
Beginning balance at Mar. 31, 2021	6,472	6,430	$ 1	6,055	373	1	42
Increase (Decrease) in Shareholders' Equity
Net income	102	98		98			4
Dividends	(17)	(17)		(17)
Contributions	6						6
Common share repurchases (in shares)			(1,887,531)
Common shares repurchases	(88)	(88)		(88)
Shared based compensation (in shares)			64,703
Share-based compensation	8	8		8
Distributions	(3)						(3)
Other comprehensive income (loss)	72	72			72
Ending balance (in shares) at Jun. 30, 2021			74,112,554
Ending balance at Jun. 30, 2021	6,552	6,503	$ 1	6,056	445	1	49
Beginning balance (in shares) at Dec. 31, 2021			67,518,424
Beginning balance at Dec. 31, 2021	6,478	6,292	$ 1	5,990	300	1	186
Increase (Decrease) in Shareholders' Equity
Net income	51	19		19			32
Dividends	(33)	(33)		(33)
Contributions	40						40
Common share repurchases (in shares)			(5,344,170)
Common shares repurchases	(306)	(306)		(306)
Shared based compensation (in shares)			301,485
Share-based compensation	2	2		2
Distributions	(15)						(15)
Other comprehensive income (loss)	(670)	(670)			(670)
Ending balance (in shares) at Jun. 30, 2022			62,475,739
Ending balance at Jun. 30, 2022	5,547	5,304	$ 1	5,672	(370)	1	243
Beginning balance (in shares) at Mar. 31, 2022			65,043,547
Beginning balance at Mar. 31, 2022	5,995	5,802	$ 1	5,878	(78)	1	193
Increase (Decrease) in Shareholders' Equity
Net income	(25)	(47)		(47)			22
Dividends	(16)	(16)		(16)
Contributions	35						35
Common share repurchases (in shares)			(2,605,947)
Common shares repurchases	(151)	(151)		(151)
Shared based compensation (in shares)			38,139
Share-based compensation	8	8		8
Distributions	(7)						(7)
Other comprehensive income (loss)	(292)	(292)			(292)
Ending balance (in shares) at Jun. 30, 2022			62,475,739
Ending balance at Jun. 30, 2022	$ 5,547	$ 5,304	$ 1	$ 5,672	$ (370)	$ 1	$ 243