Supplemental Cash Flow Information (Details) (USD $)	9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012
Supplemental Cash Flow Information [Abstract]
Interest (1)	$ 172,808,000	[1]	$ 132,264,000	[1]
Income Taxes, Net of Refunds Received	220,450,000		257,046,000
Interest Costs Capitalized	34,000,000		37,000,000
Accrued Capital Expenditures	$ 743,000,000		$ 725,000,000

[1] Net of capitalized interest of $34 million and $37 million for the nine months ended September 30, 2013 and 2012, respectively.