Ensco has received investment-grade credit ratings from the following rating agencies:

Moody's	Baa1 Stable Outlook
Standard & Poor's	BBB+ Negative Outlook

Debt Summary

Bank Facilities

Ensco refinanced its unsecured revolving credit facility with a syndicate of twelve lenders in 2011. 

	$450 Million - 364 Day Facility	$1.45 Billion - 5 Year Facility
Commitments:	$450 million, with uncommitted $100 million accordion option to increase to $550 million	$1.45 billion, with uncommitted $250 million accordion option to increase to $1.70 billion
Availability:	$450 million	$1.45 billion
Interest Rate:	LIBOR plus an applicable margin (currently 1.5% per annum)	LIBOR plus an applicable margin (currently 1.5% per annum)
Original Tenor:	364 Days	5 Years
Maturity Date:	May 2012, with an option to extend to a one-year term loan maturing in May 2013	May 2016

Long-Term Debt

 As of 30 September 2011

	Date Issued	Outstanding ($ in millions)	Interest Rate	Maturity Date
3.250% Senior Notes due 2016*	17-Mar-11	$1,000.0	3.250% fixed	15-Mar-16
8.500% Senior Notes due 2019*	02-Jun-09	$   500.0	8.500% fixed	15-Jun-19
6.875% Senior Notes due 2020*	06-Aug-10	$   900.0	6.875% fixed	15-Aug-20
4.700% Senior Notes due 2021*	17-Mar-11	$1,500.0	4.700% fixed	15-Mar-21
7.200% Debentures due 2027*	25-Nov-97	$   150.0	7.200% fixed	15-Nov-27
7.875% Senior Notes due 2040*	06-Aug-10	$   300.0	7.875% fixed	15-Aug-40
6.360% MARAD Bonds due 2015**	25-Jan-01	$  57.0	6.360% fixed	01-Dec-15
4.240% MARAD Bonds due 2016**	26-Sep-03	$  71.1	4.240% fixed	15-Jan-16
4.390% MARAD Bonds due 2016**	23-Oct-03	$  64.2	4.390% fixed	15-Apr-16
4.620% MARAD Bonds due 2016**	06-May-04	$    9.1	4.620% fixed	15-Apr-16
4.650% MARAD Bonds due 2020**	08-Oct-03	$  42.8	4.650% fixed	15-Oct-20

* Unsecured

** Secured debt guaranteed by the U.S. Dept. of Transportation, Maritime Administration. These bonds have semi-annual amortization payments and are secured by certain drilling rigs.