Income Taxes (Net Operating Loss Carryforwards and Tax Credit Carryforwards Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($)
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Amount	$ 184
Tax Credit Carryforward, Valuation Allowance	171
Alternative Minimum Tax Credit Carryforwards, Before Tax	$ 18
Tax Credit Carryforward, Expiration Date	Dec. 31, 2027
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Valuation Allowance	$ 171
US Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	25
State [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	28
Valuation allowance offset for State net operating loss carryforwards due to uncertain recoverability	24
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	2,400
CHINA
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 125
Minimum [Member] | US Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward expiration	Dec. 31, 2022
Minimum [Member] | CHINA
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward expiration	Dec. 31, 2022
Maximum [Member] | CHINA
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward expiration	Dec. 31, 2025
Research Tax Credit Carryforward [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2037