New Accounting Standards (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jan. 01, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings	$ 1,944	$ 3,886
Accumulated other comprehensive income (loss)	(8,033)	6,544
Stockholders equity	$ 6,025	$ 22,380	$ 23,554
Accounting Standards Update 2018-12 [Member] | Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings				$ 2,300
Accumulated other comprehensive income (loss)				5,300
Stockholders equity				3,500
Accounting Standards Update 2018-12 [Member] | Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings				1,300
Accumulated other comprehensive income (loss)				4,300
Stockholders equity				$ 2,500