XML 40 R63.htm IDEA: XBRL DOCUMENT v3.19.3
Debt - Senior Notes (Details) - USD ($)
2 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Aug. 31, 2019
Debt Instrument [Line Items]            
Repayment of senior notes       $ 950,000,000.0 $ 0  
Loss on extinguishment of debt   $ 15,300,000 $ 0 $ 15,300,000 $ 0  
3.750% fixed-rate notes (2029 Notes)            
Debt Instrument [Line Items]            
Stated interest rate 3.75% 3.75%   3.75%    
3.750% fixed-rate notes (2029 Notes) | Senior notes            
Debt Instrument [Line Items]            
Aggregate principal amount issued $ 500,000,000.0 $ 500,000,000.0   $ 500,000,000.0    
Stated interest rate           3.75%
Debt redemption expiration, period prior to maturity       3 months    
3.750% fixed-rate notes (2029 Notes) | Senior notes | Treasury rate            
Debt Instrument [Line Items]            
Redemption price percentage, basis spread on discount rate       35.00%    
3.300% fixed-rate notes (2020 Notes) and 4.600% fixed-rate notes (2021 Notes) | Senior notes            
Debt Instrument [Line Items]            
Repayment of senior notes 600,000,000.0          
Loss on extinguishment of debt $ 15,300,000          
3.300% fixed-rate notes (2020 Notes) | Senior notes            
Debt Instrument [Line Items]            
Stated interest rate 3.30% 3.30%   3.30%    
4.600% fixed rate notes (2021 Notes) | Senior notes            
Debt Instrument [Line Items]            
Stated interest rate 4.60% 4.60%   4.60%    
4.350% fixed-rate notes (2025 Notes)            
Debt Instrument [Line Items]            
Stated interest rate 4.35% 4.35%   4.35%    
4.350% fixed-rate notes (2025 Notes) | Senior notes            
Debt Instrument [Line Items]            
Debt redemption expiration, period prior to maturity       3 months    
4.350% fixed-rate notes (2025 Notes) | Senior notes | Treasury rate            
Debt Instrument [Line Items]            
Redemption price percentage, basis spread on discount rate       37.50%    
4.350% fixed-rate notes (2025 Notes) and 3.750% fixed-rate notes (2029 Notes) | Senior notes            
Debt Instrument [Line Items]            
Redemption price percentage       100.00%    
Repurchase price percentage related to change in control 101.00% 101.00%   101.00%