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v3.19.2

Long-Term Debt - Long-Term Debt (Parenthetical) (Detail) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2019 | Dec. 31, 2018
4.25% Senior Notes, Due 2024 |  |
Debt Instrument [Line Items] |  |
Maturity year | 2024 |
Interest rate on notes | 4.25% |
7% Debentures, Due 2025 |  |
Debt Instrument [Line Items] |  |
Maturity year | 2025 |
Interest rate on notes | 7.00% |
3.450% Senior Notes, Due 2027 |  |
Debt Instrument [Line Items] |  |
Maturity year | 2027 |
Interest rate on notes | 3.45% |
3.500% Senior Notes, Due 2027 |  |
Debt Instrument [Line Items] |  |
Maturity year | 2027 |
Interest rate on notes | 3.50% |
6.25% Senior Notes, Due 2037 |  |
Debt Instrument [Line Items] |  |
Maturity year | 2037 |
Interest rate on notes | 6.25% |
4.250% Senior Notes, Due 2047 |  |
Debt Instrument [Line Items] |  |
Maturity year | 2047 |
Interest rate on notes | 4.25% |
Floating Rate Senior Notes, Due 2020 |  |
Debt Instrument [Line Items] |  |
Maturity year | 2020 |
Interest rate | 3.17% | 3.30%
Floating Rate Senior Notes, Due 2019 |  |
Debt Instrument [Line Items] |  |
Maturity year | 2019 |
Interest rate | 2.89% | 3.29%
Trade Receivable Facility |  |
Debt Instrument [Line Items] |  |
Credit Facility interest rate | 3.17% | 3.07%

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