Supplemental Cash Flow Information (Details) (USD $)	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Supplemental Cash Flow Information [Abstract]
Interest (1)	$ 53,547,000	[1]	$ 54,558,000	[1]
Income Taxes, Net of Refunds Received	21,359,000		54,440,000
Interest Costs Capitalized	14,000,000		10,000,000
Accrued Capital Expenditures	$ 867,000,000		$ 809,000,000

[1] Net of capitalized interest of $14 million and $10 million for the three months ended March 31, 2014 and 2013, respectively.