New Accounting Standards (Narrative) (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	$ 6,311	$ 9,096
Accumulated other comprehensive income (loss)	(8,628)	6,441
Total stockholders equity	$ 2,217	$ 20,272	$ 21,170
Accounting Standards Update 2018-12 [Member] | Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings				$ 6,000
Accumulated other comprehensive income (loss)				4,300
Total stockholders equity				1,200
Accounting Standards Update 2018-12 [Member] | Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings				7,000
Accumulated other comprehensive income (loss)				5,300
Total stockholders equity				$ 2,200