Income Taxes - Valuation Allowances Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Tax Carryforward [Line Items]
Carryforwards	$ 358	$ 386
Valuation allowance	235	243	$ 222	$ 237
Deferred tax assets, net operating losses	266
Deferred tax assets, tax credit carryforwards	92
Deferred tax assets, tax credit carryforwards, expiring within 5 years	5
Deferred tax assets, tax credit carryforwards, expiring after 5 years	83
Deferred tax assets, tax credit carryforwards, no expiration	4
Accrued income taxes	586
Undistributed earnings of foreign subsidiaries	32,000
Unrecognized tax benefits	387	$ 452	$ 472	$ 319
United States
Other Tax Carryforward [Line Items]
Deferred tax assets, net operating losses, expiring within 5 years	84
Deferred tax assets, net operating losses, expiring after 5 years	53
Brazil
Other Tax Carryforward [Line Items]
Deferred tax assets, net operating losses, no expiration	$ 129