Equity Method Investments and Related Party Transactions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Equity Method Investments Disclosure [Abstract]
Proceeds from Equity Method Investment, Dividends or Distributions	$ 192	$ 178	$ 451
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	931	1,003
Equity Method Investment, Summarized Financial Information [Abstract]
Revenues and other income	770	769	1,349
Income from operations	346	313	826
Net income	313	280	728
Current assets	525	467
Noncurrent assets	1,173	1,317
Current liabilities	218	211
Noncurrent liabilities	47	41
Related Party Transactions [Abstract]
Revenue from Related Parties	54	51	56
Related Party Transaction, Purchases from Related Party	103	207	$ 207
Accounts Receivable, Related Parties, Current	23	29
Accounts Payable, Related Parties, Current	$ 11	5
EG Holdings [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	60.00%
Equity Method Investments	$ 550	603
Alba Plant LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	52.00%
Equity Method Investments	$ 215	230
AMPCO [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	45.00%
Equity Method Investments	$ 165	169
Other Equity Method Investees [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	$ 1	$ 1