Condensed Consolidating Financial Statements (Details 3) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 2,221.3	$ 1,207.0	$ 1,426.1	$ 797.7
Accounts and notes receivable - net	340.9	269.4
Inventories - net	310.0	304.2
Prepaid income taxes	118.1
Other	24.9	18.0
Total current assets	3,015.2	1,798.6
Property, plant and equipment - net	3,721.8	3,736.0
Asset retirement obligation funds	147.6	145.4
Investments in and advances to affiliates	991.9	928.6
Goodwill	2,064.5	2,064.5
Other assets	241.7	301.4
Total assets	10,182.7	8,974.5
Current liabilities:
Accounts and notes payable and accrued expenses	393.3	327.7
Income taxes payable	37.3	128.5
Customer advances	617.6	257.2
Deferred income taxes	91.3	90.1
Distributions payable to noncontrolling interest		149.7		78.0
Other	54.1	78.0
Total current liabilities	1,193.6	1,031.2
Notes payable	5.0	4.8
Long-term debt	1,600.0	1,613.0
Deferred income taxes	1,019.1	956.8
Other noncurrent liabilities	386.9	435.8
Stockholders' equity:
Preferred stock
Common stock	0.6	0.7
Paid-in capital	2,481.2	2,804.8
Retained earnings	3,015.7	2,841.0
Treasury stock	(2.3)	(1,000.2)
Accumulated other comprehensive income (loss)	(37.9)	(99.3)	(67.4)	(53.3)
Total stockholders' equity	5,457.3	4,547.0
Noncontrolling interest	520.8	385.9	487.0	383.0
Total equity	5,978.1	4,932.9	4,749.8	4,433.4
Total liabilities and equity	10,182.7	8,974.5
Parent | Condensed Consolidating Financial Information Relating to Senior Notes
Current assets:
Investments in and advances to affiliates	4,896.7	3,533.4
Due from affiliates	560.6	1,013.8
Total assets	5,457.3	4,547.2
Current liabilities:
Accounts and notes payable and accrued expenses		0.1
Total current liabilities		0.1
Stockholders' equity:
Common stock	0.6	0.7
Paid-in capital	2,481.2	2,804.8
Retained earnings	3,015.7	2,841.0
Treasury stock	(2.3)	(1,000.2)
Accumulated other comprehensive income (loss)	(37.9)	(99.2)
Total stockholders' equity	5,457.3	4,547.1
Total equity	5,457.3	4,547.1
Total liabilities and equity	5,457.3	4,547.2
Parent | Condensed Consolidating Financial Information Relating to Shelf Registration Statement
Current assets:
Investments in and advances to affiliates	4,896.7	3,533.4
Due from affiliates	560.6	1,013.8
Total assets	5,457.3	4,547.2
Current liabilities:
Accounts and notes payable and accrued expenses		0.1
Total current liabilities		0.1
Stockholders' equity:
Common stock	0.6	0.7
Paid-in capital	2,481.2	2,804.8
Retained earnings	3,015.7	2,841.0
Treasury stock	(2.3)	(1,000.2)
Accumulated other comprehensive income (loss)	(37.9)	(99.2)
Total stockholders' equity	5,457.3	4,547.1
Total equity	5,457.3	4,547.1
Total liabilities and equity	5,457.3	4,547.2
CFI | Condensed Consolidating Financial Information Relating to Senior Notes
Current assets:
Cash and cash equivalents	641.8	98.7	416.1	136.2
Accounts and notes receivable - net	108.3	76.9
Income taxes receivable	661.8	289.4
Inventories - net	228.5	212.6
Prepaid income taxes	118.1
Other	10.0	6.0
Total current assets	1,768.5	683.6
Property, plant and equipment - net	828.4	767.7
Deferred income taxes		26.1
Asset retirement obligation funds	147.6	145.4
Investments in and advances to affiliates	6,136.8	5,484.7
Goodwill	0.9	0.9
Other assets	115.5	162.3
Total assets	8,997.7	7,270.7
Current liabilities:
Accounts and notes payable and accrued expenses	1,183.5	516.3
Customer advances	407.9	184.3
Deferred income taxes	91.3	90.1
Other	11.1	66.0
Total current liabilities	1,693.8	856.7
Long-term debt	1,600.0	1,600.0
Deferred income taxes	5.7
Due to Affiliates	562.3	1,014.8
Other noncurrent liabilities	239.2	265.8
Stockholders' equity:
Paid-in capital	739.9	739.9
Retained earnings	4,194.7	2,892.7
Accumulated other comprehensive income (loss)	(37.9)	(99.2)
Total stockholders' equity	4,896.7	3,533.4
Total equity	4,896.7	3,533.4
Total liabilities and equity	8,997.7	7,270.7
CFI | Condensed Consolidating Financial Information Relating to Shelf Registration Statement
Current assets:
Cash and cash equivalents	641.8	98.7	416.1	136.2
Accounts and notes receivable - net	108.3	76.9
Income taxes receivable	661.8	289.4
Inventories - net	228.5	212.6
Prepaid income taxes	118.1
Other	10.0	6.0
Total current assets	1,768.5	683.6
Property, plant and equipment - net	828.4	767.7
Deferred income taxes		26.1
Asset retirement obligation funds	147.6	145.4
Investments in and advances to affiliates	6,136.8	5,484.7
Goodwill	0.9	0.9
Other assets	115.5	162.3
Total assets	8,997.7	7,270.7
Current liabilities:
Accounts and notes payable and accrued expenses	1,183.5	516.3
Customer advances	407.9	184.3
Deferred income taxes	91.3	90.1
Other	11.1	66.0
Total current liabilities	1,693.8	856.7
Long-term debt	1,600.0	1,600.0
Deferred income taxes	5.7
Due to Affiliates	562.3	1,014.8
Other noncurrent liabilities	239.2	265.8
Stockholders' equity:
Paid-in capital	739.9	739.9
Retained earnings	4,194.7	2,892.7
Accumulated other comprehensive income (loss)	(37.9)	(99.2)
Total stockholders' equity	4,896.7	3,533.4
Total equity	4,896.7	3,533.4
Total liabilities and equity	8,997.7	7,270.7
Subsidiaries | Condensed Consolidating Financial Information Relating to Senior Notes
Current assets:
Cash and cash equivalents	1,579.5	1,108.3	1,010.0	661.5
Accounts and notes receivable - net	1,446.5	806.4
Inventories - net	81.5	91.6
Other	14.9	12.0
Total current assets	3,122.4	2,018.3
Property, plant and equipment - net	2,893.4	2,968.3
Investments in and advances to affiliates	991.5	928.0
Due from affiliates	1.7	1.0
Goodwill	2,063.6	2,063.6
Other assets	126.2	139.1
Total assets	9,198.8	8,118.3
Current liabilities:
Accounts and notes payable and accrued expenses	137.2	132.9
Income taxes payable	699.1	417.9
Customer advances	209.7	72.9
Distributions payable to noncontrolling interest	426.8	441.7
Other	43.0	12.0
Total current liabilities	1,515.8	1,077.4
Notes payable	14.7	14.2
Long-term debt		13.0
Deferred income taxes	1,013.4	983.0
Other noncurrent liabilities	147.7	170.0
Stockholders' equity:
Preferred stock	65.3	65.3
Common stock	154.3	153.9
Paid-in capital	4,493.6	4,493.6
Retained earnings	1,409.2	805.2
Accumulated other comprehensive income (loss)	21.9	(26.5)
Total stockholders' equity	6,144.3	5,491.5
Noncontrolling interest	362.9	369.2
Total equity	6,507.2	5,860.7
Total liabilities and equity	9,198.8	8,118.3
Guarantor Subsidiaries | Condensed Consolidating Financial Information Relating to Shelf Registration Statement
Current assets:
Cash and cash equivalents	607.1	300.2	333.9	164.0
Accounts and notes receivable - net	1,000.4	367.4
Inventories - net	54.3	62.9
Other	8.6	6.6
Total current assets	1,670.4	737.1
Property, plant and equipment - net	1,547.1	1,592.4
Investments in and advances to affiliates	3,863.5	1,346.1
Due from affiliates		1,398.3
Goodwill	2,063.6	2,063.6
Other assets	98.2	113.8
Total assets	9,242.8	7,251.3
Current liabilities:
Accounts and notes payable and accrued expenses	79.1	74.7
Income taxes payable	661.8	396.9
Customer advances	199.7	65.1
Total current liabilities	940.6	536.7
Long-term debt		13.0
Deferred income taxes	848.2	811.9
Due to Affiliates	942.3
Other noncurrent liabilities	112.0	135.1
Stockholders' equity:
Common stock	153.1	153.1
Paid-in capital	4,450.2	4,450.2
Retained earnings	1,400.8	795.2
Accumulated other comprehensive income (loss)	32.7	(13.1)
Total stockholders' equity	6,036.8	5,385.4
Noncontrolling interest	362.9	369.2
Total equity	6,399.7	5,754.6
Total liabilities and equity	9,242.8	7,251.3
Non-Guarantor Subsidiaries | Condensed Consolidating Financial Information Relating to Shelf Registration Statement
Current assets:
Cash and cash equivalents	972.4	808.1	676.1	497.5
Accounts and notes receivable - net	446.1	439.0
Inventories - net	27.2	28.7
Other	6.3	5.4
Total current assets	1,452.0	1,281.2
Property, plant and equipment - net	1,346.3	1,375.9
Investments in and advances to affiliates	980.8	919.4
Due from affiliates	944.0
Other assets	28.0	25.3
Total assets	4,751.1	3,601.8
Current liabilities:
Accounts and notes payable and accrued expenses	58.1	58.4
Income taxes payable	37.3	21.0
Customer advances	10.0	7.8
Distributions payable to noncontrolling interest	426.8	441.7
Other	43.0	12.0
Total current liabilities	575.2	540.9
Notes payable	14.7	14.2
Deferred income taxes	165.2	171.0
Due to Affiliates		1,397.3
Other noncurrent liabilities	35.7	34.9
Stockholders' equity:
Preferred stock	65.3	65.3
Common stock	4.7	33.2
Paid-in capital	3,429.5	1,098.0
Retained earnings	387.4	263.3
Accumulated other comprehensive income (loss)	73.4	(16.3)
Total stockholders' equity	3,960.3	1,443.5
Total equity	3,960.3	1,443.5
Total liabilities and equity	4,751.1	3,601.8
Eliminations | Condensed Consolidating Financial Information Relating to Senior Notes
Current assets:
Accounts and notes receivable - net	(1,213.9)	(613.9)
Income taxes receivable	(661.8)	(289.4)
Total current assets	(1,875.7)	(903.3)
Deferred income taxes		(26.1)
Investments in and advances to affiliates	(11,033.1)	(9,017.5)
Due from affiliates	(562.3)	(1,014.8)
Total assets	(13,471.1)	(10,961.7)
Current liabilities:
Accounts and notes payable and accrued expenses	(927.4)	(321.6)
Income taxes payable	(661.8)	(289.4)
Distributions payable to noncontrolling interest	(426.8)	(292.0)
Total current liabilities	(2,016.0)	(903.0)
Notes payable	(9.7)	(9.4)
Deferred income taxes		(26.2)
Due to Affiliates	(562.3)	(1,014.8)
Stockholders' equity:
Preferred stock	(65.3)	(65.3)
Common stock	(154.3)	(153.9)
Paid-in capital	(5,233.5)	(5,233.5)
Retained earnings	(5,603.9)	(3,697.9)
Accumulated other comprehensive income (loss)	16.0	125.6
Total stockholders' equity	(11,041.0)	(9,025.0)
Noncontrolling interest	157.9	16.7
Total equity	(10,883.1)	(9,008.3)
Total liabilities and equity	(13,471.1)	(10,961.7)
Eliminations | Condensed Consolidating Financial Information Relating to Shelf Registration Statement
Current assets:
Accounts and notes receivable - net	(1,213.9)	(613.9)
Income taxes receivable	(661.8)	(289.4)
Total current assets	(1,875.7)	(903.3)
Deferred income taxes		(26.1)
Investments in and advances to affiliates	(14,885.9)	(10,355.0)
Due from affiliates	(1,504.6)	(2,412.1)
Total assets	(18,266.2)	(13,696.5)
Current liabilities:
Accounts and notes payable and accrued expenses	(927.4)	(321.8)
Income taxes payable	(661.8)	(289.4)
Distributions payable to noncontrolling interest	(426.8)	(292.0)
Total current liabilities	(2,016.0)	(903.2)
Notes payable	(9.7)	(9.4)
Deferred income taxes		(26.1)
Due to Affiliates	(1,504.6)	(2,412.1)
Stockholders' equity:
Preferred stock	(65.3)	(65.3)
Common stock	(157.8)	(186.3)
Paid-in capital	(8,619.6)	(6,288.1)
Retained earnings	(5,982.9)	(3,951.2)
Accumulated other comprehensive income (loss)	(68.2)	128.5
Total stockholders' equity	(14,893.8)	(10,362.4)
Noncontrolling interest	157.9	16.7
Total equity	(14,735.9)	(10,345.7)
Total liabilities and equity	$ (18,266.2)	$ (13,696.5)