Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]
Beginning balance at Dec. 31, 2020	$ 1,140	$ 759	$ 79	$ 0	$ 0	$ 242	$ (1)	$ 60
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)	(10)
Stock-based compensation	10					10
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(6)	(4)					(2)	0
Ending balance at Sep. 30, 2021	1,121	746	64	0	0	253	(3)	60
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)	(9)	5	(15)					0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(15)
Noncontrolling Interest, Change in Redemption Value	(14)	(14)
Beginning balance at Jun. 30, 2021	1,123	732	87	0	0	249	(5)	60
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)	(6)	17	(23)					0
Stock-based compensation	4					4
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	0	(2)	0	0	0	0	2	0
Ending balance at Sep. 30, 2021	1,121	746	64	0	0	253	(3)	60
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)	(6)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(23)
Noncontrolling Interest, Change in Redemption Value	0
Beginning balance at Dec. 31, 2021	1,098	726	58	0	0	257	(3)	60
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)	(25)
Stock-based compensation	13					13
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(4)	(5)					2	0
Treasury Stock, Value, Acquired, Cost Method	(14)						(14)
Ending balance at Sep. 30, 2022	1,071	1,068	(315)	0	0	270	(15)	62
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)	(24)	347	(372)					0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(372)
Noncontrolling Interest, Change in Redemption Value	0
Proceeds from Noncontrolling Interests	2					0		2
Beginning balance at Jun. 30, 2022	846	728	(196)	0	0	267	(16)	62
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)	222
Stock-based compensation	4					4
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	0	(1)	0	0	0	0	0	0
Ending balance at Sep. 30, 2022	1,071	1,068	(315)	$ 0	$ 0	$ 270	$ (15)	62
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)	222
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(118)	$ 340	$ (118)					$ 0
Noncontrolling Interest, Change in Redemption Value	0
Public Finance Puerto Rico Net Par Outstanding	$ 467