Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Investments, Owned, Federal Income Tax Note [Line Items]
Valuation allowance	$ 82	$ 1,085	$ 1,284	$ 975
Derecognition of valuation allowances	905	41	$ 0
Operating loss carryforwards	2,600
Unrecognized tax benefits	0	$ 0
State and Local Jurisdiction
Investments, Owned, Federal Income Tax Note [Line Items]
Corporate tax credit carryforward	67
State and Local Jurisdiction | Between 2037 and 2043
Investments, Owned, Federal Income Tax Note [Line Items]
Corporate tax credit carryforward	49
Non-Korea
Investments, Owned, Federal Income Tax Note [Line Items]
Operating loss carryforwards	$ 255