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Fair Value Disclosure and Measurement on Recurring Basis (Detail) ¥ in Millions, $ in Millions | Sep. 30, 2018 USD ($) | Sep. 30, 2018 CNY (¥) | Dec. 31, 2017 CNY (¥)
--- | --- | --- | ---
Fair value disclosure |  |  |
Long-term notes payable | $ 5,872 | ¥ 40,328 | ¥ 35,943
Fair value measurement |  |  |
Other invested securities | 0 | 0 | 18,350
Equity investments at fair value with readily determinable fair value | 609 | 4,200 |
Financial liabilities | 438 | 3,008 | 0
Total assets measured at fair value | 8,192 | 56,269 | 62,327
Short-term Investments |  |  |
Fair value disclosure |  |  |
Held-to-maturity debt investments | 4,675 | 32,105 | 48,695
Fair value measurement |  |  |
Available-for-sale debt investments | 8,267 | 56,777 | 40,715
Time Deposits |  |  |
Fair value disclosure |  |  |
Cash equivalents | 218 | 1,498 | 130
Money Market Funds |  |  |
Fair value disclosure |  |  |
Cash equivalents | 389 | 2,672 | 2,384
Fair Value, Inputs, Level 1 |  |  |
Fair value measurement |  |  |
Total assets measured at fair value |  | 5,003 | 2,773
Fair Value, Inputs, Level 1 | Money Market Funds |  |  |
Fair value disclosure |  |  |
Cash equivalents |  | 2,672 | 2,384
Fair Value, Inputs, Level 2 |  |  |
Fair value disclosure |  |  |
Long-term notes payable |  | 40,328 | 35,943
Fair value measurement |  |  |
Total assets measured at fair value |  | 50,091 | 59,233
Fair Value, Inputs, Level 2 | Short-term Investments |  |  |
Fair value disclosure |  |  |
Held-to-maturity debt investments |  | 32,105 | 48,695
Fair Value, Inputs, Level 2 | Time Deposits |  |  |
Fair value disclosure |  |  |
Cash equivalents |  | 1,498 | 130
Fair Value, Inputs, Level 3 |  |  |
Fair value measurement |  |  |
Total assets measured at fair value |  | 1,175 | 321
Fair Value, Measurement, Recurring |  |  |
Fair value measurement |  |  |
Other invested securities |  |  | 18,350
Fair Value, Measurement, Recurring | Other non-current assets |  |  |
Fair value measurement |  |  |
Derivative instruments | 43 | 296 | 168
Fair Value, Measurement, Recurring | Accounts Payable and Accrued Liabilities |  |  |
Fair value measurement |  |  |
Derivative instruments | 18 | 123 |
Fair Value, Measurement, Recurring | Amounts Due to Related Parties, Noncurrent |  |  |
Fair value measurement |  |  |
Financial liabilities | 51 | 347 |
Fair Value, Measurement, Recurring | Short-term Investments |  |  |
Fair value measurement |  |  |
Available-for-sale debt investments | 7,304 | 50,161 | 40,715
Fair Value, Measurement, Recurring | Other Long-term Investments |  |  |
Fair value measurement |  |  |
Equity investments at fair value with readily determinable fair value | 728 | 5,003 |
Available-for-sale equity investments |  |  | 2,773
Investment accounted for at fair value | $ 186 | 1,279 | 321
Fair Value, Measurement, Recurring | Fair Value, Inputs, Level 1 | Other Long-term Investments |  |  |
Fair value measurement |  |  |
Equity investments at fair value with readily determinable fair value |  | 5,003 |
Available-for-sale equity investments |  |  | 2,773
Fair Value, Measurement, Recurring | Fair Value, Inputs, Level 2 |  |  |
Fair value measurement |  |  |
Other invested securities |  |  | 18,350
Fair Value, Measurement, Recurring | Fair Value, Inputs, Level 2 | Other non-current assets |  |  |
Fair value measurement |  |  |
Derivative instruments |  | 277 | 168
Fair Value, Measurement, Recurring | Fair Value, Inputs, Level 2 | Amounts Due to Related Parties, Noncurrent |  |  |
Fair value measurement |  |  |
Financial liabilities |  | 347 |
Fair Value, Measurement, Recurring | Fair Value, Inputs, Level 2 | Short-term Investments |  |  |
Fair value measurement |  |  |
Available-for-sale debt investments |  | 50,161 | 40,715
Fair Value, Measurement, Recurring | Fair Value, Inputs, Level 3 | Other non-current assets |  |  |
Fair value measurement |  |  |
Derivative instruments |  | 19 |
Fair Value, Measurement, Recurring | Fair Value, Inputs, Level 3 | Accounts Payable and Accrued Liabilities |  |  |
Fair value measurement |  |  |
Derivative instruments |  | 123 |
Fair Value, Measurement, Recurring | Fair Value, Inputs, Level 3 | Other Long-term Investments |  |  |
Fair value measurement |  |  |
Investment accounted for at fair value |  | ¥ 1,279 | ¥ 321

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