Restructuring Costs (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) employee	Sep. 30, 2022 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 4		$ 39
Positions eliminated | employee			475
Percent of positions eliminated			8.00%
Severance costs		$ 5	$ 31	$ 5
Impairment loss		16	5	16
Accrued restructuring expense	2		2
Wrote off of fixed assets	1		14
Disposal of property and equipment	$ 2	59	$ 271	81
Restructuring costs and asset impairment charge		68		68
Furniture, fixtures, equipment and other
Restructuring Cost and Reserve [Line Items]
Wrote off of fixed assets		4		4
Capitalized software and hardware
Restructuring Cost and Reserve [Line Items]
Disposal of property and equipment		$ 43		$ 43