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Short-Term and Long-Term Loans - Additional Information (Detail)
Share data in Millions, unless otherwise specified
1 Months Ended 6 Months Ended 12 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 6 Months Ended 12 Months Ended 1 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 1 Months Ended 6 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 6 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 6 Months Ended 12 Months Ended 1 Months Ended 2 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended
Nov. 28, 2012
USD ($)
Nov. 28, 2012
ZAR
Dec. 31, 2010
USD ($)
Dec. 31, 2012
USD ($)
Dec. 31, 2011
USD ($)
Jun. 30, 2010
USD ($)
Dec. 31, 2012
ZAR
Nov. 16, 2012
ZAR
Oct. 24, 2012
USD ($)
Oct. 24, 2012
ZAR
Dec. 31, 2011
ZAR
Jan. 30, 2013
Subsequent Event
USD ($)
Feb. 18, 2013
Subsequent Event
USD ($)
Mar. 08, 2013
Subsequent Event
Gold Fields Operations
ZAR
Mar. 08, 2013
Subsequent Event
GFI Joint Venture Holdings
USD ($)
Jan. 30, 2013
Bridge Facility
Subsequent Event
USD ($)
Nov. 28, 2012
Refinancing of Line of Credit, Non-Revolving Credit Facility
USD ($)
Nov. 28, 2012
Term Loan Credit Facilty [Member]
USD ($)
Nov. 28, 2012
Term Loan Credit Facilty [Member]
ZAR
Mar. 01, 2013
Nedbank Revolving Credit Facility [Member]
Subsequent Event
ZAR
Nov. 28, 2012
Spin Off [Member]
Nov. 28, 2012
Spin Off [Member]
Term Loan Credit Facilty [Member]
USD ($)
Nov. 28, 2012
Spin Off [Member]
Term Loan Credit Facilty [Member]
ZAR
Nov. 28, 2012
$500 million Syndicated Revolving Credit Facility
USD ($)
Feb. 15, 2013
$500 million Syndicated Revolving Credit Facility
Subsequent Event
USD ($)
Nov. 28, 2012
R1 billion syndicated revolving credit facility
USD ($)
Nov. 28, 2012
R1 billion syndicated revolving credit facility
ZAR
Feb. 15, 2013
R1 billion syndicated revolving credit facility
Subsequent Event
USD ($)
Dec. 31, 2012
R3.5 billion long term revolving credit facility [Member]
USD ($)
Dec. 31, 2012
R3.5 billion long term revolving credit facility [Member]
ZAR
Dec. 31, 2012
Uncollateralized Loan [Member]
Nedbank Revolving Credit Facility [Member]
Dec. 31, 2010
Collateralized
Mvelaphanda Resources Limited
Dec. 31, 2012
Collateralized
Split tenor revolving credit facility
USD ($)
Dec. 31, 2011
Collateralized
Split tenor revolving credit facility
USD ($)
May 16, 2007
Collateralized
Split tenor revolving credit facility
USD ($)
May 26, 2011
Collateralized
Split tenor revolving credit facility
Orogen Investments SA (Luxembourg)
USD ($)
Jun. 30, 2010
Collateralized
Split tenor revolving credit facility
Orogen Investments SA (Luxembourg)
USD ($)
Apr. 30, 2008
Collateralized
Split tenor revolving credit facility
364-Day Revolving Credit
USD ($)
May 16, 2007
Collateralized
Split tenor revolving credit facility
364-Day Revolving Credit
USD ($)
May 15, 2009
Collateralized
Split tenor revolving credit facility
364-Day Revolving Credit
Orogen Investments SA (Luxembourg)
USD ($)
Jun. 30, 2008
Collateralized
Split tenor revolving credit facility
364-Day Revolving Credit
Orogen Investments SA (Luxembourg)
USD ($)
May 15, 2009
Collateralized
Split tenor revolving credit facility
364-Day Revolving Credit
Gold Fields Operations
USD ($)
Jun. 30, 2008
Collateralized
Split tenor revolving credit facility
364-Day Revolving Credit
Gold Fields Operations
USD ($)
Apr. 30, 2008
Collateralized
Split tenor revolving credit facility
5 Year Revolving Credit
Dec. 31, 2012
Collateralized
Split tenor revolving credit facility
5 Year Revolving Credit
May 16, 2007
Collateralized
Split tenor revolving credit facility
5 Year Revolving Credit
USD ($)
Apr. 26, 2012
Collateralized
Split tenor revolving credit facility
5 Year Revolving Credit
Orogen Investments SA (Luxembourg)
USD ($)
Jun. 22, 2011
Collateralized
Split tenor revolving credit facility
5 Year Revolving Credit
Orogen Investments SA (Luxembourg)
USD ($)
Mar. 22, 2011
Collateralized
Split tenor revolving credit facility
5 Year Revolving Credit
Orogen Investments SA (Luxembourg)
USD ($)
Aug. 31, 2010
Collateralized
Split tenor revolving credit facility
5 Year Revolving Credit
Orogen Investments SA (Luxembourg)
USD ($)
Dec. 31, 2010
Collateralized
Split tenor revolving credit facility
5 Year Revolving Credit
Orogen Investments SA (Luxembourg)
USD ($)
Jun. 30, 2009
Collateralized
Split tenor revolving credit facility
5 Year Revolving Credit
Orogen Investments SA (Luxembourg)
USD ($)
Jun. 30, 2008
Collateralized
Split tenor revolving credit facility
5 Year Revolving Credit
Orogen Investments SA (Luxembourg)
USD ($)
Dec. 31, 2011
Collateralized
Split tenor revolving credit facility
5 Year Revolving Credit
Orogen Investments SA (Luxembourg)
USD ($)
Oct. 08, 2010
Collateralized
Split tenor revolving credit facility
5 Year Revolving Credit
Orogen Investments SA (Luxembourg)
USD ($)
Sep. 30, 2009
Collateralized
Split tenor revolving credit facility
5 Year Revolving Credit
Gold Fields Operations
USD ($)
May 15, 2009
Collateralized
Split tenor revolving credit facility
5 Year Revolving Credit
Gold Fields Operations
USD ($)
Jun. 30, 2008
Collateralized
Split tenor revolving credit facility
5 Year Revolving Credit
Gold Fields Operations
USD ($)
Apr. 17, 2012
Collateralized
$500 million Syndicated Revolving Credit Facility
USD ($)
Dec. 31, 2012
Collateralized
$500 million Syndicated Revolving Credit Facility
USD ($)
Dec. 31, 2012
Collateralized
$500 million Syndicated Revolving Credit Facility
Utilization under the facility is less than or equal to 33 1/3%
Dec. 31, 2012
Collateralized
$500 million Syndicated Revolving Credit Facility
Utilization under the facility is greater than 33 1/3% and less than or equal to 66 2/3%
Dec. 31, 2012
Collateralized
$500 million Syndicated Revolving Credit Facility
Utilisation is greater than 66 2/3%
Nov. 23, 2012
Collateralized
$500 million Syndicated Revolving Credit Facility
Orogen Investments SA (Luxembourg)
USD ($)
Nov. 29, 2012
Collateralized
$500 million Syndicated Revolving Credit Facility
Orogen Investments SA (Luxembourg)
USD ($)
Sep. 20, 2012
Collateralized
$500 million Syndicated Revolving Credit Facility
Orogen Investments SA (Luxembourg)
USD ($)
Aug. 02, 2012
Collateralized
$500 million Syndicated Revolving Credit Facility
Orogen Investments SA (Luxembourg)
USD ($)
Jul. 25, 2012
Collateralized
$500 million Syndicated Revolving Credit Facility
Orogen Investments SA (Luxembourg)
USD ($)
Jun. 01, 2012
Collateralized
$500 million Syndicated Revolving Credit Facility
Orogen Investments SA (Luxembourg)
USD ($)
Apr. 23, 2012
Collateralized
$500 million Syndicated Revolving Credit Facility
Orogen Investments SA (Luxembourg)
USD ($)
Dec. 31, 2012
Collateralized
$500 million Syndicated Revolving Credit Facility
Orogen Investments SA (Luxembourg)
USD ($)
Feb. 15, 2013
Collateralized
$500 million Syndicated Revolving Credit Facility
Subsequent Event
USD ($)
Mar. 31, 2011
Collateralized
Preference shares
USD ($)
Oct. 10, 2008
Collateralized
Preference shares
USD ($)
Dec. 24, 2007
Collateralized
Preference shares
ZAR
Dec. 31, 2010
Collateralized
Preference shares
USD ($)
Dec. 24, 2007
Collateralized
Preference shares
Minimum
Dec. 24, 2007
Collateralized
Preference shares
Maximum
Apr. 05, 2011
Collateralized
Scrip Loan
USD ($)
Apr. 05, 2011
Collateralized
Scrip Loan
ZAR
Mar. 26, 2010
Collateralized
Scrip Loan
USD ($)
Mar. 26, 2010
Collateralized
Scrip Loan
ZAR
Dec. 31, 2012
Collateralized
Scrip Loan
USD ($)
Dec. 31, 2011
Collateralized
Scrip Loan
USD ($)
Mar. 26, 2010
Collateralized
Scrip Loan
Mvelaphanda Resources Limited
Sep. 30, 2010
Collateralized
Non-revolving Senior Secured Term Loan
USD ($)
Dec. 31, 2010
Collateralized
Non-revolving Senior Secured Term Loan
USD ($)
Dec. 31, 2012
Collateralized
Non-revolving Senior Secured Term Loan
USD ($)
Installment
Dec. 31, 2011
Collateralized
Non-revolving Senior Secured Term Loan
USD ($)
Sep. 17, 2010
Collateralized
Non-revolving Senior Secured Term Loan
USD ($)
Sep. 30, 2010
Collateralized
$1 Billion Notes Issue
Orogen Investments SA (Luxembourg)
USD ($)
Dec. 31, 2012
Collateralized
$1 Billion Notes Issue
Orogen Investments SA (Luxembourg)
USD ($)
Jun. 20, 2011
Collateralized
R1 billion syndicated revolving credit facility
USD ($)
Dec. 31, 2012
Collateralized
R1 billion syndicated revolving credit facility
USD ($)
Dec. 31, 2011
Collateralized
R1 billion syndicated revolving credit facility
USD ($)
Dec. 31, 2012
Collateralized
R1 billion syndicated revolving credit facility
Utilization under the facility is less than or equal to 33 1/3%
Dec. 31, 2012
Collateralized
R1 billion syndicated revolving credit facility
Utilization under the facility is greater than 33 1/3% and less than or equal to 66 2/3%
Apr. 23, 2012
Collateralized
R1 billion syndicated revolving credit facility
Orogen Investments SA (Luxembourg)
USD ($)
Apr. 16, 2012
Collateralized
R1 billion syndicated revolving credit facility
Orogen Investments SA (Luxembourg)
USD ($)
Mar. 15, 2012
Collateralized
R1 billion syndicated revolving credit facility
Orogen Investments SA (Luxembourg)
USD ($)
Dec. 19, 2011
Collateralized
R1 billion syndicated revolving credit facility
Orogen Investments SA (Luxembourg)
USD ($)
Dec. 23, 2011
Collateralized
R1 billion syndicated revolving credit facility
Orogen Investments SA (Luxembourg)
USD ($)
Nov. 30, 2011
Collateralized
R1 billion syndicated revolving credit facility
Orogen Investments SA (Luxembourg)
USD ($)
Sep. 30, 2011
Collateralized
R1 billion syndicated revolving credit facility
Orogen Investments SA (Luxembourg)
USD ($)
Aug. 30, 2011
Collateralized
R1 billion syndicated revolving credit facility
Orogen Investments SA (Luxembourg)
USD ($)
Jun. 30, 2011
Collateralized
R1 billion syndicated revolving credit facility
Orogen Investments SA (Luxembourg)
USD ($)
Dec. 31, 2012
Collateralized
R1 billion syndicated revolving credit facility
Orogen Investments SA (Luxembourg)
USD ($)
Dec. 31, 2011
Collateralized
R1 billion syndicated revolving credit facility
Orogen Investments SA (Luxembourg)
USD ($)
Dec. 31, 2010
Collateralized
$60 million senior secured revolving credit facility
Dec. 31, 2012
Collateralized
$60 million senior secured revolving credit facility
USD ($)
Dec. 31, 2011
Collateralized
$60 million senior secured revolving credit facility
USD ($)
Dec. 22, 2010
Collateralized
$60 million senior secured revolving credit facility
USD ($)
Aug. 31, 2012
Collateralized
$60 million senior secured revolving credit facility
Abosso Goldfields Limited
USD ($)
Apr. 30, 2012
Collateralized
$60 million senior secured revolving credit facility
Abosso Goldfields Limited
USD ($)
May 01, 2012
Collateralized
$60 million senior secured revolving credit facility
Abosso Goldfields Limited
USD ($)
Feb. 25, 2011
Collateralized
$60 million senior secured revolving credit facility
Abosso Goldfields Limited
USD ($)
Aug. 31, 2012
Collateralized
$60 million senior secured revolving credit facility
Gold Fields Ghana Limited
USD ($)
May 01, 2012
Collateralized
$60 million senior secured revolving credit facility
Gold Fields Ghana Limited
USD ($)
Jan. 30, 2012
Collateralized
$60 million senior secured revolving credit facility
Gold Fields Ghana Limited
USD ($)
Nov. 28, 2011
Collateralized
$60 million senior secured revolving credit facility
Gold Fields Ghana Limited
USD ($)
Mar. 31, 2012
Collateralized
$60 million senior secured revolving credit facility
Gold Fields Ghana Limited
USD ($)
Dec. 31, 2012
Collateralized
$60 million senior secured revolving credit facility
Gold Fields Ghana Limited
USD ($)
Dec. 31, 2011
Collateralized
$60 million senior secured revolving credit facility
Gold Fields Ghana Limited
USD ($)
Dec. 22, 2010
Collateralized
Senior Secured Credit Facility Fiscal Year Twenty Twelve [Member]
USD ($)
Dec. 22, 2010
Collateralized
Senior Secured Credit Facility Fiscal Year Twenty Thirteen [Member]
USD ($)
Dec. 31, 2012
Uncollateralized
Domestic Medium Term Notes Program
USD ($)
Dec. 31, 2011
Uncollateralized
Domestic Medium Term Notes Program
USD ($)
Dec. 31, 2010
Uncollateralized
Domestic Medium Term Notes Program
USD ($)
Apr. 06, 2009
Uncollateralized
Domestic Medium Term Notes Program
ZAR
Dec. 31, 2010
Uncollateralized
Other loans
USD ($)
Dec. 31, 2012
Uncollateralized
Other loans
USD ($)
Dec. 31, 2011
Uncollateralized
Other loans
USD ($)
Dec. 31, 2012
Uncollateralized
Other loans
ZAR
May 12, 2010
Uncollateralized
Other loans
Minimum
USD ($)
May 12, 2010
Uncollateralized
Other loans
Maximum
USD ($)
Dec. 31, 2012
Uncollateralized
Other loans
New Revolving Credit Agreement
USD ($)
Dec. 09, 2009
Uncollateralized
Other loans
Revolving Credit Facility Matures December Seventeenth Twenty Twelve
USD ($)
Dec. 09, 2009
Uncollateralized
Other loans
Revolving Credit Facility Matures December Seventeenth Twenty Twelve
ZAR
Mar. 08, 2010
Uncollateralized
Other loans
Revolving Credit Facility Matures March Tenth, Twenty Thirteen
USD ($)
Mar. 08, 2010
Uncollateralized
Other loans
Revolving Credit Facility Matures March Tenth, Twenty Thirteen
ZAR
May 06, 2009
Uncollateralized
Other loans
Revolving Credit Facility Matures June Tenth, Twenty fourteen
USD ($)
May 06, 2009
Uncollateralized
Other loans
Revolving Credit Facility Matures June Tenth, Twenty fourteen
ZAR
Dec. 19, 2011
Uncollateralized
Other loans
Revolving Credit Facility Matures December Seventeen Twenty Sixteen
USD ($)
Dec. 19, 2011
Uncollateralized
Other loans
Revolving Credit Facility Matures December Seventeen Twenty Sixteen
ZAR
Dec. 31, 2012
Three Year Revolving Credit Facility
Jan. 30, 2013
Three Year Revolving Credit Facility
Subsequent Event
USD ($)
Nov. 28, 2012
Three Year Revolving Credit Facility
GFI Joint Venture Holdings
USD ($)
Dec. 31, 2012
Five Year Revolving Credit Facility
Nov. 28, 2012
Five Year Revolving Credit Facility
USD ($)
Jan. 30, 2013
Five Year Revolving Credit Facility
Subsequent Event
USD ($)
Dec. 31, 2012
Five Year Revolving Credit Facility
Condition One
Dec. 31, 2012
Five Year Revolving Credit Facility
Condition Two
Dec. 31, 2012
Five Year Revolving Credit Facility
Condition Three [Member]
Debt Instrument [Line Items]                                                                                                                                                                                                                                                                                                                  
Long-term revolving credit facility                                   $ 466,700,000 4,000,000,000 1,500,000,000           $ 233,400,000 2,000,000,000   $ 249,400,000 2,000,000,000         $ 750,000,000       $ 250,000,000             $ 500,000,000                         $ 500,000,000                                                             $ 200,000,000     $ 1,000,000,000                                     $ 60,000,000                       $ 43,000,000 $ 35,000,000       10,000,000,000         $ 450,000,000 $ 550,000,000 $ 1,000,000,000 $ 116,700,000 1,000,000,000 $ 58,300,000 500,000,000 $ 175,000,000 1,500,000,000 $ 233,400,000 2,000,000,000     $ 900,000,000   $ 450,000,000        
Conversion of outstanding loan                                                                           250,000,000                                                                                                                                                                                                                                      
Maturity date                                                                           May 16, 2009           May 16, 2012                             Apr. 17, 2017                             Jan. 24, 2011   Sep. 15, 2011             May 20, 2011               Oct. 07, 2020   Jun. 20, 2016                               Feb. 21, 2014                                                     Sep. 30, 2013                                  
Long and short-term loans raised     1,543,800,000 1,451,000,000 1,167,900,000 1,619,900,000               350,000,000 350,000,000                                     540,000,000             73,000,000           1,000,000,000 120,000,000 420,000,000 70,000,000 221,000,000 120,000,000 121,000,000       118,000,000     244,000,000                                     18,800,000 127,000,000 19,500,000 144,000,000 0 18,200,000   200,000,000               666,000,000 483,000,000                             23,000,000 70,000,000                                     39,400,000 518,000,000 56,700,000                                          
Line of credit facility amount 700,100,000 6,000,000,000   350,000,000     3,000,000,000 1,000,000,000 58,300,000 500,000,000                                       2,000,000,000       500,000,000                 177,000,000                     500,000,000       141,000,000   104,000,000                     104,000,000                                 110,000,000 150,000,000         666,000,000 220,000,000                       666,000,000 220,000,000     50,000,000                     0 50,000,000                                                            
Loan Refinance     1,330,800,000 975,900,000 654,600,000 1,637,500,000                     600,000,000                               500,000,000 40,000,000   40,000,000 32,000,000     16,000,000                               259,000,000       140,000,000           100,000,000 20,000,000 20,000,000                     18,800,000 127,000,000       39,600,000     10,000,000 40,000,000 40,000,000         220,000,000 263,000,000     220,000,000     33,000,000 50,000,000   105,000,000 75,000,000         73,000,000 20,000,000   23,000,000       20,000,000 7,000,000 7,000,000   16,000,000                 41,900,000 2,900,000 56,700,000                                          
Line of credit facility refinanced amount                                               1,000,000,000 500,000,000     1,000,000,000                       57,000,000   59,000,000         500,000,000               500,000,000                                 1,440,000,000                                                     500,000,000                                                                                                            
Line of credit interest rate description       The Rand bridge loan facilities bear interest at JIBAR plus a margin of 3.00% per annum for 12 months after the Spin-Off and 3.50% per annum for the last six months of the facilities                                                     Interest at JIBAR plus a margin of 2.50% per annum.                           The loan under Facility B bore interest at LIBOR plus a margin of 0.30% per annum.                                                                                                                                                                           The facility bore interest at LIBOR plus a margin of 1.75% per annum.                                            
Loan, margin                                                                                         0.30%                             1.60%                                         5.00% 5.00%                                                                                                 1.75%                                            
Line of credit facility utilization description                                                                                                                       Where the utilisation under the facility was less than or equal to 33 1/3%, a utilisation fee of 0.20% per annum would be payable on the amount of utilisations. Where the utilisation under the facility was greater than 33 1/3% and less than or equal to 66 2/3%, a utilisation fee of 0.40% per annum would be payable on the amount of utilisations. Where the utilisation under the facility was greater than 66 2/3%, a utilisation fee of 0.60% per annum would be payable on the amount of utilisations.                                                                   Where the utilization under the facility is greater than 33 1/3% and less than or equal to 66 2/3%, a utilization fee of 0.20% per annum will be payable on the amount of utilizations. Where the utilization under the facility is greater than 66 2/3%, a utilization fee of 0.40% per annum will be payable on the amount of utilizations.                                                                         Where the utilization under the facility was equal to or greater than 50%, a utilization fee of 0.25% per annum would be payable on the amount of utilizations. Such utilization fee was payable quarterly in arrears.                                       less than or equal to 33 1/3% greater than 33 1/3% and less than or equal to 66 2/3% greater than 66 2/3%
Line of credit facility, utilization fee rate                                                                                                                         0.40% 0.20% 0.60%                                                                 0.20% 0.40%                                                                                                                
Line of credit facility commitment fee percentage       35.00%                                                     0.85%                                                         0.56%                                                                   0.42%                             1.30%                                           0.70%     0.65% 0.90%                         0.90%          
Long and short-term loans raised                                                                                                                               10,000,000 20,000,000       20,000,000 194,000,000                                                       194,000,000 556,000,000 110,000,000     33,000,000     450,000,000               15,000,000 8,000,000 20,000,000       50,000,000                                                                  
Date of cancellation                                                                                                                                               Feb. 15, 2013                                                                                                                                                                  
Issued non-convertible redeemable preference shares to Rand Merchant Bank                                                                                                                                                     1,200,000,000                                                                                                                                                            
Dividend rate payable as a percentage of Prime rate                                                                                                                                                         22.00% 61.00%                                                                                                                                                      
Outstanding preference shares repaid                                                                                                                                                 90,000,000 61,000,000                                                                                                                                                              
Preference dividend paid     3,100,000   1,300,000 5,900,000                                                                                                                                       2,500,000   19,300,000                                                                                                                                                          
Payment for redemption of preference shares, dividend                                                                                                                                                 1,500,000                                                                                                                                                                
Shares subject to scrip lending agreement                                                               3                                                                                                         3                                                                                                                                        
Loan bears interest at LIBOR plus a margin rate                                                                                                                                                                                   2.00%                                                                                                                              
Principal payments schedule                                                                                                                                                                               The facility amount is repayble in 20 equal quarterly instalments of $10 million each.                                                                                                                                  
Number of equal quarterly installments                                                                                                                                                                               20                                                                                                                                  
Debt maturity period                                                                                                                                                                               5 years                                                                                           3 years 5 years                                    
Notes issued, face value       2,372,400,000 1,907,700,000                                                                                                                                                                           1,000,000,000                                                                                                                            
Interest rate                                                                                                                                                                                     4.875%                                                                                                                            
Transaction cost                                                                                                                                                                                       13,600,000                                                                                                                          
Revolving credit facility, optional maximum borrowing capacity                                                                                                                                                                                         1,100,000,000                                                                                                                        
Line of credit facility, additional interest above LIBOR                                                                                                                                                                                           1.20%                             2.85%                                                                                        
Ownership interest acquired from IAMGOLD                                                                                                                                                                                                                       18.90%                                                                                          
Notes issued                                                                                                                                                                                                                                                                                                                    
Settlements                                                                                                                                                                                                                                                             105,300,000                                                    
Notes outstanding                                                                                                                                                                                                                                                               108,900,000                                                  
Outstanding Borrowings                                                                                                                                                                                                                                                                     142,400,000    1,220,000,000                                        
Revolving credit facility description                                                                                                                                                                                                                                                                     $450 million syndicated revolving loan facility with an option to increase the facility to $550 million within six months from signing date. The option to increase the facility to $550 million was not exercised. The purpose of the facilities was to refinance existing facilities, for general corporate purposes and working capital.                                            
Line of credit facility utilization fee percentage                                                                                                                                                                                                                                                                     0.25%                                       0.20% 0.40% 0.60%
Revolving loan facility, commitment fee                                                                                                                                                                                                                                                                     The borrowers were required to pay a quarterly commitment fee of 0.70% per annum.                                            
Line of credit facility, outstanding                                                                                                                                                                                                                                                                                                                    
Term Loan and Revolving Credit Facility 450,000,000                     1,440,000,000                                                                                                                                                                                                                                                                                          
Increase in credit facility                       1,440,000,000                                                                                                                                                                                                                                                                           720,000,000       720,000,000      
Cancellation of credit facility                               0                                                                                                                                                                                                                                                                                  
Line of credit facility interest rate at LIBOR plus an initial margin                                                                                                                                                                                                                                                                                                 2.45%     2.25%          
Line of credit facility decreases 583,400,000 5,000,000,000                                               175,000,000 1,500,000,000                                                                                                                                                                                                                                                            
Term loan decreases                                           408,400,000 3,500,000,000                                                                                                                                                                                                                                                                    
Line of credit facility period                                         18 months                                                                                                                                                                                                                                                                        
Short-term debt reclassified to long-term                         $ 142,400,000