Income Taxes - Schedule of Components of Net Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Deferred tax assets, depreciation	$ 11	$ 8
Deferred tax assets, employee benefits	232	300
Deferred tax assets, loss provisions	26	20
Deferred tax assets, deferred income	62	50
Deferred tax assets, interest	99	105
Deferred tax assets, tax loss carryforwards	2,955	3,226
Deferred tax assets, tax credit carryforwards	268	358
Deferred tax assets, other	6	10
Deferred tax assets, gross	3,659	4,077
Valuation allowance	(1,965)	(2,279)	$ (2,307)	$ (2,121)
Deferred tax assets, net	1,694	1,798
Deferred tax liabilities, depreciation	492	538
Deferred tax liabilities, employee benefits	1	3
Deferred tax liabilities, loss provisions	1	1
Deferred tax liabilities, deferred expense	1,161	1,098
Deferred tax liabilities, interest	0	0
Deferred tax liabilities, tax loss carryforwards	0	0
Deferred tax liabilities, tax credit carryforwards	0	0
Deferred tax liabilities, other	6	7
Deferred tax liabilities, gross	$ 1,661	$ 1,647