Debt (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | ||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2012
Credit facilities: Uncommitted revolver [Member]
|
Dec. 31, 2011
Credit facilities: Uncommitted revolver [Member]
|
Dec. 31, 2012
Credit facilities: September 2013
|
Dec. 31, 2011
Credit facilities: September 2013
|
Dec. 31, 2012
Credit facilities: April 2016 [Member]
|
Dec. 31, 2011
Credit facilities: April 2016 [Member]
|
Dec. 31, 2012
Credit facilities: May 2017 [Member]
|
Dec. 31, 2011
Credit facilities: May 2017 [Member]
|
Dec. 31, 2012
Senior notes: June 2017 [Member]
|
Dec. 31, 2011
Senior notes: June 2017 [Member]
|
Dec. 31, 2012
Senior notes: May 2018 [Member]
|
Dec. 31, 2011
Senior notes: May 2018 [Member]
|
Dec. 31, 2012
Senior notes: September 2019 [Member]
|
Dec. 31, 2011
Senior notes: September 2019 [Member]
|
Dec. 31, 2012
Senior notes: March 2020 [Member]
|
Dec. 31, 2011
Senior notes: March 2020 [Member]
|
Mar. 31, 2010
Senior notes: March 2020 [Member]
|
Dec. 31, 2012
Senior notes: November 2021 [Member]
|
Dec. 31, 2011
Senior notes: November 2021 [Member]
|
Dec. 31, 2012
Senior notes: June 2022 [Member]
|
Jun. 30, 2012
Senior notes: June 2022 [Member]
|
Dec. 31, 2011
Senior notes: June 2022 [Member]
|
Dec. 31, 2012
Senior notes: May 2023 [Member]
|
Dec. 31, 2011
Senior notes: May 2023 [Member]
|
Dec. 31, 2012
Senior notes: March 2035 [Member]
|
Dec. 31, 2011
Senior notes: March 2035 [Member]
|
Dec. 31, 2012
Senior notes: March 2040 [Member]
|
Dec. 31, 2011
Senior notes: March 2040 [Member]
|
Dec. 31, 2012
Senior notes: May 2041 [Member]
|
Dec. 31, 2011
Senior notes: May 2041 [Member]
|
Dec. 31, 2012
Debentures: May 2021 [Member]
|
Dec. 31, 2011
Debentures: May 2021 [Member]
|
Dec. 31, 2012
Debentures: September 2035 [Member]
|
Dec. 31, 2011
Debentures: September 2035 [Member]
|
Dec. 31, 2012
Tax-exempt: 2013 - 2037 [Member]
|
Dec. 31, 2011
Tax-exempt: 2013 - 2037 [Member]
|
Dec. 31, 2012
Other: 2013 - 2046 [Member]
|
Dec. 31, 2011
Other: 2013 - 2046 [Member]
|
|
Debt Instrument [Line Items] | ||||||||||||||||||||||||||||||||||||||||
Interest Rate | Variable | Variable | Variable | Variable | ||||||||||||||||||||||||||||||||||||
Interest Rate (in percentage) | 1.35% | 6.875% | 6.875% | 3.80% | 5.50% | 5.00% | 5.00% | 5.25% | 3.55% | 3.55% | 4.75% | 6.086% | 6.20% | 5.70% | 9.25% | 9.25% | 7.40% | 7.40% | ||||||||||||||||||||||
Interest Rate, minimum | 0.13% | 5.00% | ||||||||||||||||||||||||||||||||||||||
Interest Rate, maximum | 5.625% | 11.90% | ||||||||||||||||||||||||||||||||||||||
Principal | $ 7,150.2 | $ 7,092.2 | $ 13.9 | $ 0 | $ 0 | $ 17.2 | $ 25.0 | $ 17.2 | $ 0 | $ 0 | $ 0 | $ 750.0 | $ 700.0 | $ 700.0 | $ 650.0 | $ 650.0 | $ 850.0 | $ 850.0 | $ 600.0 | $ 600.0 | $ 850.0 | $ 0 | $ 550.0 | $ 550.0 | $ 275.7 | $ 275.7 | $ 650.0 | $ 650.0 | $ 600.0 | $ 600.0 | $ 35.3 | $ 35.3 | $ 165.2 | $ 165.2 | $ 1,097.9 | $ 1,142.2 | $ 87.2 | $ 89.4 | ||
Discount | (79.7) | (170.4) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | (75.8) | (0.2) | (0.2) | (3.4) | (3.8) | (0.1) | (0.1) | 0 | 0 | (2.2) | 0 | (1.3) | (1.4) | (24.9) | (25.5) | (0.5) | (0.5) | (3.4) | (3.4) | (1.9) | (2.0) | (41.4) | (41.9) | (0.4) | (15.8) | 0 | 0 | ||
Carrying Value | 7,070.5 | 6,921.8 | 13.9 | 0 | 0 | 17.2 | 25.0 | 17.2 | 0 | 0 | 0 | 674.2 | 699.8 | 699.8 | 646.6 | 646.2 | 849.9 | 849.9 | 600.0 | 600.0 | 847.8 | 0 | 548.7 | 548.6 | 250.8 | 250.2 | 649.5 | 649.5 | 596.6 | 596.6 | 33.4 | 33.3 | 123.8 | 123.3 | 1,097.5 | 1,126.4 | 87.2 | 89.4 | ||
Less: current portion | (19.4) | (34.8) | ||||||||||||||||||||||||||||||||||||||
Long-term portion | $ 7,051.1 | $ 6,887.0 |