Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015
Supplemental Cash Flow Information [Abstract]
Interest (1)	[1]	$ 184,476	$ 152,590
Income Taxes, Net of Refunds Received		(2,094)	69,281
Accrued Capital Expenditures		$ 375,000	$ 437,000

[1] Net of capitalized interest of $25 million and $33 million for the nine months ended September 30, 2016 and 2015, respectively.