Long-Term Debt and Capital Lease Obligations (Tables)

12 Months Ended

Dec. 31, 2012

Long-Term Debt and Capital Lease Obligations (Tables) [Abstract]

Long-term debt outstanding maturities and sinking fund requirements

Debentures and Notes:   As of December 31, 2012, the maturities and sinking fund requirements of our long-term debt outstanding (excluding obligations under capital leases) were as follows:

	(Millions of Dollars)
2013	$	396.3
2014	322.4
2015	399.5
2016	27.4
2017	29.5
Thereafter	3,597.8
Total	$	4,772.9

Summary of capitalized leased facilities

The following is a summary of our capitalized leased facilities as of December 31:

Capital Lease Assets	2012			2011
	(Millions of Dollars)
Leased Facilities
Long-term power purchase commitment	$	140.3		$	140.3
Accumulated amortization	(86.8		)	(81.1		)
Total Leased Facilities	$	53.5		$	59.2

Future minimum lease payments under capital lease and present value of net minimum lease payments

Future minimum lease payments under our capital lease and the present value of our net minimum lease payments as of December 31, 2012 are as follows:

	(Millions of Dollars)
2013	$	40.4
2014	41.9
2015	43.5
2016	45.1
2017	13.9
Thereafter	71.5
Total Minimum Lease Payments	256.3
Less:  Estimated Executory Costs	(68.4		)
Net Minimum Lease Payments	187.9
Less:  Interest	(67.9		)
Present Value of Net
Minimum Lease Payments	120.0
Less:  Due Currently	(15.8		)
	$	104.2