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Debt - Additional Information (Detail)
6 Months Ended
May 05, 2020
USD ($)
May 04, 2020
USD ($)
Jun. 30, 2020
USD ($)
Jul. 14, 2020
USD ($)
Jun. 30, 2020
EUR (€)
Mar. 18, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2019
EUR (€)
Revolving Credit Facility                
Debt Instrument [Line Items]                
Credit facility     $ 2,000,000,000     $ 1,900,000,000    
Credit facility borrowings outstanding     1,900,000,000       $ 0  
Letters of credit issued under the credit facility     16,000,000       16,000,000  
Uncommitted Credit Facility | International Subsidiary One                
Debt Instrument [Line Items]                
Credit facility | €         € 50,000,000      
Credit facility borrowings outstanding         € 0   0 € 0
Senior Notes                
Debt Instrument [Line Items]                
Accrued interest related to senior notes     98,000,000       $ 76,000,000  
Unsecured Senior Notes | Subsequent Event                
Debt Instrument [Line Items]                
Senior unsecured notes principal amount       $ 1,250,000,000        
5.95% senior notes due 2020                
Debt Instrument [Line Items]                
Senior unsecured notes principal amount     $ 750,000,000          
Debt, interest rate (percentage)     5.95%   5.95%      
Senior notes issued price percentage     99.893%   99.893%      
Debt instrument redemption price percentage     100.00%          
5.95% senior notes due 2020 | Upon the occurrence of certain change of control triggering events                
Debt Instrument [Line Items]                
Debt instrument redemption price percentage     101.00%          
2.5% (€650 million) senior notes due 2022                
Debt Instrument [Line Items]                
Senior unsecured notes principal amount | €         € 650,000,000      
Debt, interest rate (percentage)     2.50%   2.50%      
Senior notes issued price percentage     99.525%   99.525%      
Debt instrument redemption price percentage     100.00%          
2.5% (€650 million) senior notes due 2022 | Upon the occurrence of certain change of control triggering events                
Debt Instrument [Line Items]                
Debt instrument redemption price percentage     101.00%          
4.5% senior notes due 2024                
Debt Instrument [Line Items]                
Senior unsecured notes principal amount     $ 500,000,000          
Debt, interest rate (percentage)     4.50%   4.50%      
Senior notes issued price percentage     99.444%   99.444%      
Debt instrument redemption price percentage     100.00%          
4.5% senior notes due 2024 | Upon the occurrence of certain change of control triggering events                
Debt Instrument [Line Items]                
Debt instrument redemption price percentage     101.00%          
5.0% senior notes due 2026                
Debt Instrument [Line Items]                
Senior unsecured notes principal amount     $ 750,000,000          
Debt, interest rate (percentage)     5.00%   5.00%      
Senior notes issued price percentage     99.535%   99.535%      
Debt instrument redemption price percentage     100.00%          
5.0% senior notes due 2026 | Upon the occurrence of certain change of control triggering events                
Debt Instrument [Line Items]                
Debt instrument redemption price percentage     101.00%          
3.8% senior notes due 2028                
Debt Instrument [Line Items]                
Senior unsecured notes principal amount     $ 1,000,000,000          
Debt, interest rate (percentage)     3.80%   3.80%      
Senior notes issued price percentage     99.747%   99.747%      
Debt instrument redemption price percentage     100.00%          
3.8% senior notes due 2028 | Upon the occurrence of certain change of control triggering events                
Debt Instrument [Line Items]                
Debt instrument redemption price percentage     101.00%          
3.25% senior notes due 2030                
Debt Instrument [Line Items]                
Senior unsecured notes principal amount     $ 1,250,000,000          
Debt, interest rate (percentage)     3.25%   3.25%      
Senior notes issued price percentage     99.225%   99.225%      
3.25% senior notes due 2030 | Notes prior to November 15, 2029                
Debt Instrument [Line Items]                
Debt instrument redemption price percentage     100.00%          
3.25% senior notes due 2030 | Notes on or after November 15, 2029                
Debt Instrument [Line Items]                
Debt instrument redemption price percentage     100.00%          
3.25% senior notes due 2030 | Upon the occurrence of certain change of control triggering events                
Debt Instrument [Line Items]                
Debt instrument redemption price percentage     101.00%          
6.25% senior notes due 2025                
Debt Instrument [Line Items]                
Debt, interest rate (percentage)     6.25%   6.25%      
6.25% senior notes due 2025 | Unsecured Senior Notes                
Debt Instrument [Line Items]                
Senior unsecured notes principal amount $ 2,000,000,000              
Debt, interest rate (percentage) 6.25%              
Debt instrument redemption price percentage 100.00%              
6.25% senior notes due 2025 | Upon the occurrence of certain change of control triggering events                
Debt Instrument [Line Items]                
Debt instrument redemption price percentage     101.00%          
7.0% senior notes due 2025                
Debt Instrument [Line Items]                
Debt, interest rate (percentage)     7.00%   7.00%      
7.0% senior notes due 2025 | Unsecured Senior Notes                
Debt Instrument [Line Items]                
Senior unsecured notes principal amount $ 750,000,000              
Debt, interest rate (percentage) 7.00%              
Debt instrument redemption price percentage 100.00%              
7.0% senior notes due 2025 | Unsecured Senior Notes | Maximum                
Debt Instrument [Line Items]                
Percentage of principal amount redeemed 40.00%              
7.0% senior notes due 2025 | Upon the occurrence of certain change of control triggering events                
Debt Instrument [Line Items]                
Debt instrument redemption price percentage     101.00%          
Amended Credit Facility Maturing on May 31, 2023                
Debt Instrument [Line Items]                
Debt, interest rate (percentage)     2.55%   2.55%      
Credit facility     $ 2,000,000,000          
Credit facility borrowings outstanding     $ 1,900,000,000          
Commitment fee on undrawn amounts   2.25%            
Additional credit facility, excess amount   $ 1,145,000,000            
Amended Credit Facility Maturing on May 31, 2023 | Minimum                
Debt Instrument [Line Items]                
Debt, interest rate (percentage)   0.10%            
Amended Credit Facility Maturing on May 31, 2023 | Maximum                
Debt Instrument [Line Items]                
Debt, interest rate (percentage)   0.85%            
Amended Credit Facility Maturing on May 31, 2023 | Notes prior to November 15, 2029                
Debt Instrument [Line Items]                
Commitment fee on undrawn amounts   1.25%            
Additional credit facility, excess amount   $ 1,145,000,000            
Amended Credit Facility Maturing on May 31, 2023 | Notes prior to November 15, 2029 | Minimum                
Debt Instrument [Line Items]                
Debt, interest rate (percentage)   1.00%            
Amended Credit Facility Maturing on May 31, 2023 | Notes prior to November 15, 2029 | Maximum                
Debt Instrument [Line Items]                
Debt, interest rate (percentage)   1.75%            
Amended Credit Facility Maturing on May 31, 2023 | Notes on or after November 15, 2029                
Debt Instrument [Line Items]                
Additional credit facility, excess amount   $ 1,145,000,000            
Amended Credit Facility Maturing on May 31, 2023 | Notes on or after November 15, 2029 | Minimum                
Debt Instrument [Line Items]                
Debt, interest rate (percentage)   0.00%            
Amended Credit Facility Maturing on May 31, 2023 | Notes on or after November 15, 2029 | Maximum                
Debt Instrument [Line Items]                
Debt, interest rate (percentage)   0.75%            
Amended Credit Facility Maturing on May 31, 2023 | Upon the occurrence of certain change of control triggering events                
Debt Instrument [Line Items]                
Debt instrument, covenant, leverage ratio, maximum   5.00            
Additional credit facility, excess amount   $ 1,145,000,000            
Amended Credit Facility Maturing on May 31, 2023 | Upon the occurrence of certain change of control triggering events | Minimum                
Debt Instrument [Line Items]                
Debt, interest rate (percentage)   1.10%            
Amended Credit Facility Maturing on May 31, 2023 | Upon the occurrence of certain change of control triggering events | Maximum                
Debt Instrument [Line Items]                
Debt, interest rate (percentage)   1.85%            
Additional Credit Facility | Maximum                
Debt Instrument [Line Items]                
Additional borrowing capacity $ 855,000,000              
Eurodollar | Amended Credit Facility Maturing on May 31, 2023                
Debt Instrument [Line Items]                
Debt, interest rate (percentage)   2.35%            
Base Rate | Amended Credit Facility Maturing on May 31, 2023                
Debt Instrument [Line Items]                
Debt, interest rate (percentage)   1.35%