Income Taxes (Net Operating Loss Carryforwards Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)
US Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 36
State [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	54
Valuation allowance offset for State net operating loss carryforwards due to uncertain recoverability	50
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	2,300
CHINA
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 418
Minimum [Member] | US Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward expiration	Dec. 31, 2021
Minimum [Member] | CHINA
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward expiration	Dec. 31, 2017
Maximum [Member] | CHINA
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward expiration	Dec. 31, 2021