Borrowings - Carrying Value and Fair Value of Long-Term Borrowings (Parenthetical) (Detail) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2015 |
May. 06, 2015 |
|
| 6.25% Notes due 2017 [Member] | ||
| Debt Instrument [Line Items] | ||
| Long-term borrowings interest rate | 6.25% | |
| Debt instrument maturity date | 2017 | |
| 5.00% Notes due 2019 [Member] | ||
| Debt Instrument [Line Items] | ||
| Long-term borrowings interest rate | 5.00% | |
| Debt instrument maturity date | 2019 | |
| 4.25% Notes due 2021 [Member] | ||
| Debt Instrument [Line Items] | ||
| Long-term borrowings interest rate | 4.25% | |
| Debt instrument maturity date | 2021 | |
| 3.375% Notes due 2022 [Member] | ||
| Debt Instrument [Line Items] | ||
| Long-term borrowings interest rate | 3.375% | |
| Debt instrument maturity date | 2022 | |
| 3.50% Notes due 2024 [Member] | ||
| Debt Instrument [Line Items] | ||
| Long-term borrowings interest rate | 3.50% | |
| Debt instrument maturity date | 2024 | |
| 1.25% Notes due 2025 [Member] | ||
| Debt Instrument [Line Items] | ||
| Long-term borrowings interest rate | 1.25% | 1.25% |
| Debt instrument maturity date | 2025 |