General and Summary of Significant Accounting Policies New Accounting Pronouncements Adopted (Details)	12 Months Ended
	Dec. 31, 2015 USD ($) integer
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement, number of noncurrent deferred tax assets or liabilities	1
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 0
Other Comprehensive Income (Loss), Effect of Change in Accounting Principle, Net of Taxes	13,000,000
Accounting Standard Update 2014-05 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	(18,000,000)
Other Comprehensive Income (Loss), Effect of Change in Accounting Principle, Net of Taxes	13,000,000
Other Noncurrent Assets [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	356,000,000
Other Noncurrent Assets [Member] | Accounting Standard Update 2014-05 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 1,500,000,000
Mong Duong Subsidiary [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of deliverables in an agreement | integer	2
New Accounting Pronouncement or Change in Accounting Principle, Current Period Disclosures, Revenue Recognized, Amount	$ 0