Note 6 - Fair Value Measurement of Assets and Liabilities (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Funds receivable and customer accounts	$ 9,012	$ 8,094
Long-Term Investment [Member]
Fair Value Disclosure, additional details
Cost and equity method investments included in long-term investments	325	327
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Cash and cash equivalents	6,855	6,817
Funds receivable and customer accounts	2,429
Financial assets	15,138	12,174
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring [Member] | Short-term Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	3,581	2,591
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring [Member] | Long-Term Investment [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	2,163	2,711
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring [Member] | Other Current Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Derivative assets	110	55
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring [Member] | Other Current Liabilities [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Derivatives liabilities	48	86
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring [Member] | Restricted Cash [Member] | Short-term Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	12	15
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Short-term Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	2,284	1,153
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Long-Term Investment [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	2,148	2,669
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring [Member] | Foreign Government Debt Securities [Member] | Short-term Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	45	20
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring [Member] | Foreign Government Debt Securities [Member] | Long-Term Investment [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	15	42
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring [Member] | Bank Time Deposits [Member] | Short-term Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	358	765
Estimate of Fair Value, Fair Value Disclosure | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Short-term Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	882	638
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Cash and cash equivalents	5,911	5,685
Funds receivable and customer accounts	0
Financial assets	6,805	6,338
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring [Member] | Short-term Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	894	653
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring [Member] | Long-Term Investment [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring [Member] | Other Current Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Derivative assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring [Member] | Other Current Liabilities [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Derivatives liabilities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring [Member] | Restricted Cash [Member] | Short-term Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	12	15
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Short-term Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Long-Term Investment [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring [Member] | Foreign Government Debt Securities [Member] | Short-term Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring [Member] | Foreign Government Debt Securities [Member] | Long-Term Investment [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring [Member] | Bank Time Deposits [Member] | Short-term Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Short-term Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	882	638
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Cash and cash equivalents	944	1,132
Funds receivable and customer accounts	2,429
Financial assets	8,333	5,836
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member] | Short-term Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	2,687	1,938
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member] | Long-Term Investment [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	2,163	2,711
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member] | Other Current Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Derivative assets	110	55
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member] | Other Current Liabilities [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Derivatives liabilities	48	86
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member] | Restricted Cash [Member] | Short-term Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	0	0
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Short-term Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	2,284	1,153
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Long-Term Investment [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	2,148	2,669
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member] | Foreign Government Debt Securities [Member] | Short-term Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	45	20
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member] | Foreign Government Debt Securities [Member] | Long-Term Investment [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	15	42
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member] | Bank Time Deposits [Member] | Short-term Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	358	765
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Short-term Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Investments	0	0
Bank Time Deposits [Member]
Fair Value Disclosure, additional details
Held-to-maturity Securities, Current	$ 18	$ 6