|
Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) (USD $)
In Millions, unless otherwise specified
|
Mar. 31, 2015
|
Sep. 30, 2014
|
| Investment securities: |
|
|
| Trading |
$ 71 |
$ 69 |
| Fair Value, Measurements, Recurring |
|
|
| Accrued liabilities |
|
|
| Visa Europe put option |
145 |
145 |
| Level 1 | Fair Value, Measurements, Recurring |
|
|
| Prepaid and other current assets: |
|
|
| Fair value, total assets |
4,824 |
4,580 |
| Accrued liabilities |
|
|
| Fair value, total liabilities |
0 |
0 |
| Level 2 | Fair Value, Measurements, Recurring |
|
|
| Prepaid and other current assets: |
|
|
| Fair value, total assets |
2,842 |
2,761 |
| Accrued liabilities |
|
|
| Fair value, total liabilities |
11 |
6 |
| Level 3 | Fair Value, Measurements, Recurring |
|
|
| Prepaid and other current assets: |
|
|
| Fair value, total assets |
7 |
7 |
| Accrued liabilities |
|
|
| Fair value, total liabilities |
145 |
145 |
| Visa Europe put option | Level 3 | Fair Value, Measurements, Recurring |
|
|
| Accrued liabilities |
|
|
| Visa Europe put option |
145 |
145 |
| Foreign exchange derivative instruments | Level 2 | Fair Value, Measurements, Recurring |
|
|
| Accrued liabilities |
|
|
| Foreign exchange derivative instruments |
11 |
6 |
| Money market funds | Level 1 | Fair Value, Measurements, Recurring |
|
|
| Cash equivalents and restricted cash: |
|
|
| Cash equivalents and restricted cash: |
2,160 |
2,277 |
| Commercial paper | Level 2 | Fair Value, Measurements, Recurring |
|
|
| Cash equivalents and restricted cash: |
|
|
| Cash equivalents and restricted cash: |
48 |
37 |
| Equity securities | Level 1 | Fair Value, Measurements, Recurring |
|
|
| Investment securities: |
|
|
| Trading |
71 |
69 |
| Available-for-sale securities |
13 |
58 |
| U.S. government-sponsored debt securities | Level 2 | Fair Value, Measurements, Recurring |
|
|
| Investment securities: |
|
|
| Available-for-sale securities |
2,112 |
2,162 |
| U.S. Treasury securities | Level 1 | Fair Value, Measurements, Recurring |
|
|
| Investment securities: |
|
|
| Available-for-sale securities |
2,580 |
2,176 |
| Corporate debt securities | Level 2 | Fair Value, Measurements, Recurring |
|
|
| Investment securities: |
|
|
| Available-for-sale securities |
563 |
522 |
| Auction rate securities | Level 3 | Fair Value, Measurements, Recurring |
|
|
| Investment securities: |
|
|
| Available-for-sale securities |
7 |
7 |
| Foreign exchange derivative instruments | Level 2 | Fair Value, Measurements, Recurring |
|
|
| Prepaid and other current assets: |
|
|
| Prepaid and other current assets: |
$ 119 |
$ 40 |