Stockholders' Equity - Changes in Common Stock (Details) - USD ($) $ in Millions	3 Months Ended										9 Months Ended
	Sep. 30, 2024		Jun. 30, 2024		Mar. 31, 2024		Sep. 30, 2023		Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Class of Stock [Line Items]
Total stockholders’ equity	$ 858		$ 786		$ 835		$ 1,146		$ 1,230	$ 1,184	$ 858	$ 1,146	$ 765	$ 1,161
Adjustments to Additional Paid in Capital Settlement of Liability Awards and Other					65					25
Redemption Premium	(10)		1		(43)		3		1	(14)
Treasury Stock, Value, Acquired, Cost Method	(45)	[1]	(151)	[1]	(25)	[1]	(113)	[2]	(5)	(28)	(221)
Stock Repurchased During Period, Value									(15)	(8)
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition	17		20		14		12		13	15
Net income	64		82		82		80		5	27	228	112
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	46		(1)		(23)		(66)		47	6
Excise Taxes												1
Common Stock [Member]
Class of Stock [Line Items]
Total stockholders’ equity	1		1		1		1		1	1	1	1	1	1
Additional Paid-in Capital [Member]
Class of Stock [Line Items]
Total stockholders’ equity	1,182		1,175		1,154		1,402		1,387	1,388	1,182	1,402	1,118	1,370
Adjustments to Additional Paid in Capital Settlement of Liability Awards and Other					65					25
Redemption Premium	(10)		1		(43)		3		1	(14)
Stock Repurchased During Period, Value									15	(8)
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition	17		20		14		12		13	15
Retained Earnings [Member]
Class of Stock [Line Items]
Total stockholders’ equity	908		844		762		613		538	539	908	613	680	517
Net income	64		82		82		75		(1)	22
Treasury Stock, Common
Class of Stock [Line Items]
Total stockholders’ equity	(972)		(927)		(776)		(726)		(613)	(608)	(972)	(726)	(751)	(580)
Treasury Stock, Value, Acquired, Cost Method	(45)	[1]	(151)	[1]	(25)	[1]	(113)	[2]	(5)	(28)
AOCI Attributable to Parent [Member]
Class of Stock [Line Items]
Total stockholders’ equity	(261)		(307)		(306)		(331)		(265)	(312)	$ (261)	(331)	$ (283)	(318)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ 46		$ (1)		$ (23)		(66)		47	6
Noncontrolling Interest [Member]
Class of Stock [Line Items]
Total stockholders’ equity							187		182	176		$ 187		$ 171
Net income							$ 5		$ 6	$ 5

[1] (1) Includes excise taxes of $1 million for the nine months ended September 30, 2024.

[2] (1) Includes excise taxes of $1 million for the three and nine months ended September 30, 2023.