Consolidated Statement of Cash Flow (Parentheticals) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash and cash equivalents	$ 433,000,000	$ 546,000,000
Capitalized Interest	0	2,000,000	$ 3,000,000
Cash and Cash Equivalent [Member]
Cash and cash equivalents	433,000,000	546,000,000
Current Assets Held for Sale [Member]
Cash and cash equivalents	$ 1,000,000	$ 1,000,000	$ 0