Condensed Consolidated Statement of Shareholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Total	Common Shares	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	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	137	126		126			11
Dividends	(50)	(50)		(50)
Contributions	34						34
Common share repurchases (in shares)			(6,793,058)
Common shares repurchases	(305)	(305)		(305)
Shared based compensation (in shares)			488,102
Share-based compensation	10	10		10
Distributions	(11)						(11)
Other comprehensive income (loss)	(124)	(124)			(124)
Ending balance (in shares) at Sep. 30, 2021			71,241,940
Ending balance at Sep. 30, 2021	6,375	6,300	$ 1	5,924	374	1	75
Beginning balance (in shares) at Jun. 30, 2021			74,112,554
Beginning balance at Jun. 30, 2021	6,552	6,503	$ 1	6,056	445	1	49
Increase (Decrease) in Shareholders' Equity
Net income	20	17		17			3
Dividends	(16)	(16)		(16)
Contributions	25						25
Common share repurchases (in shares)			(2,918,993)
Common shares repurchases	(140)	(140)		(140)
Shared based compensation (in shares)			48,379
Share-based compensation	7	7		7
Distributions	(2)						(2)
Other comprehensive income (loss)	(71)	(71)			(71)
Ending balance (in shares) at Sep. 30, 2021			71,241,940
Ending balance at Sep. 30, 2021	6,375	6,300	$ 1	5,924	374	1	75
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	56	30		30			26
Dividends	(49)	(49)		(49)
Contributions	63						63
Common share repurchases (in shares)			(7,134,565)
Common shares repurchases	(403)	(403)		(403)
Shared based compensation (in shares)			335,572
Share-based compensation	11	11		11
Distributions	(51)						(51)
Other comprehensive income (loss)	(952)	(952)			(952)
Ending balance (in shares) at Sep. 30, 2022			60,719,431
Ending balance at Sep. 30, 2022	5,153	4,929	$ 1	5,579	(652)	1	224
Beginning balance (in shares) at Jun. 30, 2022			62,475,739
Beginning balance at Jun. 30, 2022	5,547	5,304	$ 1	5,672	(370)	1	243
Increase (Decrease) in Shareholders' Equity
Net income	5	11		11			(6)
Dividends	(16)	(16)		(16)
Contributions	23						23
Common share repurchases (in shares)			(1,790,395)
Common shares repurchases	(97)	(97)		(97)
Shared based compensation (in shares)			34,087
Share-based compensation	9	9		9
Distributions	(36)						(36)
Other comprehensive income (loss)	(282)	(282)			(282)
Ending balance (in shares) at Sep. 30, 2022			60,719,431
Ending balance at Sep. 30, 2022	$ 5,153	$ 4,929	$ 1	$ 5,579	$ (652)	$ 1	$ 224