Goodwill and Other Intangible Assets - Rollforward Goodwill (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
	Oct. 31, 2023	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Goodwill Activity
As of beginning of period			$ 6,955	$ 9,360
Impairment	$ (2,400)	$ 0	0	(2,405)	$ 0
As of end of period		6,955	6,955	6,955	$ 9,360
Accumulated impairment losses		$ 2,405	$ 2,405	$ 2,405