v3.19.2
Borrowings - Additional Information (Detail) - USD ($)
1 Months Ended 6 Months Ended
Apr. 30, 2019
Jun. 30, 2019
Debt Instrument [Line Items]    
Debt instrument, aggregate principal amount   $ 5,997,000,000
Commercial Paper [Member]    
Debt Instrument [Line Items]    
Maximum amount available under facility   4,000,000,000.0
Amount outstanding under credit facility   0
2019 Revolving Credit Facility [Member]    
Debt Instrument [Line Items]    
Unsecured revolving credit facility   4,000,000,000.0
Additional amount available, subject to lender credit approval   1,000,000,000.0
Maximum amount available under facility   5,000,000,000.0
Amount outstanding under credit facility   $ 0
Extended debt instrument maturity date   2024-03
Line of credit facility, covenant terms   The 2019 credit facility requires the Company not to exceed a maximum leverage ratio (ratio of net debt to earnings before interest, taxes, depreciation and amortization, where net debt equals total debt less unrestricted cash) of 3 to 1
Line of credit facility, covenant compliance   satisfied with a ratio of less than 1 to 1
3.25% Notes due 2029 [Member]    
Debt Instrument [Line Items]    
Debt instrument, aggregate principal amount $ 1,000,000,000.0 $ 1,000,000,000
Debt instrument, interest rate 3.25%  
Debt instrument, maturity date Apr. 30, 2029  
Debt instrument, Approximate annual interest expense $ 33,000,000  
Debt instrument, payment terms Interest is payable semi-annually on April 30 and October 30 of each year, commencing October 30, 2019