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Debt - Additional Information (Detail)
£ in Millions
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
USD ($)
May 31, 2017
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Dec. 31, 2016
USD ($)
Jun. 30, 2017
GBP (£)
Jun. 30, 2017
JPY (¥)
Mar. 31, 2017
USD ($)
Mar. 31, 2017
JPY (¥)
Feb. 28, 2017
JPY (¥)
Debt Instrument [Line Items]                        
Credit facility maximum borrowing capacity $ 3,452,000,000   $ 3,452,000,000   $ 3,452,000,000              
Issued amount 11,125,473,000   11,125,473,000   $ 11,125,473,000              
Interest rate         3.00%   3.20%          
Gains (losses) on early extinguishment of debt, net     (30,596,000) $ 2,044,000 $ (30,596,000) $ 992,000            
Borrowings outstanding 0   0   0              
Senior Notes Outstanding 6,700,000,000   6,700,000,000   6,700,000,000              
Carrying Value of Debt 11,081,922,000   11,081,922,000   11,081,922,000   $ 10,608,294,000          
Senior Notes [Member]                        
Debt Instrument [Line Items]                        
Issued amount 6,778,264,000   6,778,264,000   $ 6,778,264,000              
Interest rate         3.10%   3.30%          
Cash paid to redeem senior notes 652,000,000                      
Redeemed amount of issued notes 618,300,000   618,300,000   $ 618,300,000              
Gains (losses) on early extinguishment of debt, net (32,200,000)                      
Carrying Value of Debt 6,727,450,000   6,727,450,000   6,727,450,000   $ 6,417,492,000          
Senior Notes [Member] | 2.25%, Maturing in 2029 [Member]                        
Debt Instrument [Line Items]                        
Issued amount $ 645,300,000   645,300,000   645,300,000     £ 500.0        
Interest rate 2.25%                      
Maturity year 2029                      
Percentage of par value issued 99.94%                      
Senior notes all-in-rate 2.30%                      
2017 Yen Term Loan Tranche One [Member]                        
Debt Instrument [Line Items]                        
Credit facility maximum borrowing capacity $ 64,300,000   $ 64,300,000   $ 64,300,000           ¥ 7,200,000,000  
Debt Instrument maturity date         2027-03              
Debt instrument interest rate 0.92%   0.92%   0.92%     0.92% 0.92%      
2017 Yen Term Loan Tranche Two [Member]                        
Debt Instrument [Line Items]                        
Credit facility maximum borrowing capacity $ 42,900,000   $ 42,900,000   $ 42,900,000           4,800,000,000  
Debt Instrument maturity date         2028-03              
Debt instrument interest rate 1.01%   1.01%   1.01%     1.01% 1.01%      
2017 Yen Senior Term Loan [Member]                        
Debt Instrument [Line Items]                        
Borrowings outstanding                   $ 107,200,000 ¥ 12,000,000,000  
2017 Term Loan [Member]                        
Debt Instrument [Line Items]                        
Credit facility maximum borrowing capacity $ 1,000,000,000   $ 1,000,000,000   $ 1,000,000,000              
Debt Instrument maturity date         2020-05              
Borrowings outstanding 500,000,000   500,000,000   $ 500,000,000              
2017 Term Loan [Member] | Maximum [Member]                        
Debt Instrument [Line Items]                        
Issued amount   $ 500,000,000                    
2017 Term Loan [Member] | LIIBOR [Member]                        
Debt Instrument [Line Items]                        
Interest rate   0.90%                    
Term Loan [Member]                        
Debt Instrument [Line Items]                        
Interest rate         1.60%   1.40%          
Carrying Value of Debt 1,954,091,000   1,954,091,000   $ 1,954,091,000   $ 1,484,523,000          
Global Facility [Member]                        
Debt Instrument [Line Items]                        
Credit facility maximum borrowing capacity 3,000,000,000   3,000,000,000   3,000,000,000              
Ability to increase borrowing capacity subject to currency fluctuations and obtaining additional lender commitments 3,800,000,000   3,800,000,000   $ 3,800,000,000              
Debt Instrument maturity date         2020-04              
Revolver [Member]                        
Debt Instrument [Line Items]                        
Credit facility maximum borrowing capacity 580,600,000   580,600,000   $ 580,600,000       ¥ 65,000,000,000      
Debt Instrument maturity date         2021-02              
Credit facility current borrowing capacity $ 446,700,000   $ 446,700,000   $ 446,700,000       ¥ 50,000,000,000     ¥ 45,000,000,000