v3.7.0.1
Financing Narrative (Detail)
1 Months Ended 3 Months Ended 12 Months Ended
Jun. 15, 2016
Jun. 30, 2016
USD ($)
Mar. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Jun. 20, 2016
USD ($)
Jun. 16, 2016
USD ($)
Debt Instrument [Line Items]                
Debt discounts, premiums and issuance costs     $ 19,300,000 $ 20,100,000        
Long-term borrowings, carrying value     3,262,700,000 3,358,000,000 $ 0      
Debt proceeds, net of issuance costs       3,000,000,000        
Cash dividend paid to Former Parent       3,000,000,000 $ 0 $ 0    
Interest Paid       44,000,000        
Commercial Paper [Member]                
Debt Instrument [Line Items]                
Long-term borrowings, carrying value       374,800,000        
Commercial Paper [Member] | US Dollar-Denominated Commercial Paper [Member]                
Debt Instrument [Line Items]                
Long-term borrowings, carrying value     $ 118,500,000 $ 347,900,000        
Debt Instrument, Term     7 days 9 days        
Short-term maturity period (maximum)       397 days        
Short-term Debt, Weighted Average Interest Rate     1.29% 1.08%        
Commercial Paper [Member] | Euro Denominated Commercial Paper [Member]                
Debt Instrument [Line Items]                
Long-term borrowings, carrying value     $ 160,300,000 $ 26,800,000        
Debt Instrument, Term     37 days 35 days        
Short-term maturity period (maximum)       183 days        
Short-term Debt, Weighted Average Interest Rate     (0.04%) (0.06%)        
Senior Notes [Member]                
Debt Instrument [Line Items]                
Aggregate principle amount   $ 2,500,000,000            
Senior Notes [Member] | Debt Instrument, Redemption, Period One [Member]                
Debt Instrument [Line Items]                
Percent of principle owed in change of control       101.00%        
Senior Notes [Member] | 1.80% Senior Unsecured Notes due 2019 [Member]                
Debt Instrument [Line Items]                
Long-term borrowings, carrying value     $ 298,400,000 $ 298,300,000        
Interest rate     1.80%       1.80%  
Aggregate principle amount             $ 300,000,000  
Percentage issued             99.893%  
Senior Notes [Member] | 2.35% Senior Unsecured Notes due 2021 [Member]                
Debt Instrument [Line Items]                
Long-term borrowings, carrying value     $ 745,100,000 744,800,000        
Interest rate     2.35%       2.35%  
Aggregate principle amount             $ 750,000,000  
Percentage issued             99.977%  
Senior Notes [Member] | 3.15% Senior Unsecured Notes due 2026 [Member]                
Debt Instrument [Line Items]                
Long-term borrowings, carrying value     $ 890,400,000 890,100,000        
Interest rate     3.15%       3.15%  
Aggregate principle amount             $ 900,000,000  
Percentage issued             99.644%  
Senior Notes [Member] | Initial Senior Unsecured Notes due 2046 [Member]                
Debt Instrument [Line Items]                
Interest rate             4.30%  
Aggregate principle amount             $ 350,000,000  
Percentage issued             99.783%  
Senior Notes [Member] | Additional Senior Unsecured Notes due 2046 [Member]                
Debt Instrument [Line Items]                
Interest rate             4.30%  
Aggregate principle amount             $ 200,000,000  
Percentage issued             101.564%  
Term Loan [Member]                
Debt Instrument [Line Items]                
Long-term borrowings, carrying value     $ 500,000,000 $ 500,000,000     $ 500,000,000  
Line of Credit Facility, Current Borrowing Capacity             500,000,000  
Debt Instrument, Term   3 years            
Interest rate       1.87%        
Annual effective rate       1.72%        
Revolving Credit Facility [Member]                
Debt Instrument [Line Items]                
Line of Credit Facility, Current Borrowing Capacity   $ 1,500,000,000         1,500,000,000 $ 1,500,000,000
Debt Instrument, Term 5 years 5 years            
Revolving credit facility, extension option   1 year            
Additional increase to the Credit Agreement             $ 500,000,000  
Consolidated net leverage ratio covenant (less than)       3.50        
Consolidated interest coverage ratio covenant (greater than)       3.50        
Borrowings outstanding on line of credit       $ 0        
Federal Funds Effective Swap Rate [Member] | Revolving Credit Facility [Member]                
Debt Instrument [Line Items]                
Spread on variable rate       0.50%        
London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member]                
Debt Instrument [Line Items]                
Spread on variable rate       1.00%        
Net Parent Investment                
Debt Instrument [Line Items]                
Cash dividend paid to Former Parent       $ 3,000,000,000        
Minimum [Member] | Revolving Credit Facility [Member]                
Debt Instrument [Line Items]                
Annual facility fee on Revolving Credit Facility       0.09%        
Maximum [Member] | Revolving Credit Facility [Member]                
Debt Instrument [Line Items]                
Annual facility fee on Revolving Credit Facility       0.25%