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Summary of Significant Accounting Policies (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
12 Months Ended | 1 Months Ended | 0 Months Ended | |||
|---|---|---|---|---|---|---|
|
Dec. 31, 2014
|
Feb. 13, 2015
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Sep. 03, 2014
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Aug. 05, 2014
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Oct. 31, 2014
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Sep. 30, 2014
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| Subsidiary, Sale of Stock [Line Items] | ||||||
| Unrecognized Tax Benefits Resulting in Net Operating Loss Carryforward 1 | $ 1,009 | |||||
| Synchrony Financial | ||||||
| Subsidiary, Sale of Stock [Line Items] | ||||||
| Sale of Stock, Consideration Received on Transaction | 2,842 | |||||
| Sale of Stock, Percentage of Ownership after Transaction | 85.00% | |||||
| Synchrony Financial Noncontrolling Interest | 15.00% | |||||
| Proceeds from Issuance of Unsecured Debt | 8,000 | |||||
| Unsecured Long-term Debt, Noncurrent | $ 1,000 | $ 750 | $ 3,593 | |||
| Debt Conversion, Original Debt, Due Date, Year | 2019 | 2020 | ||||
| Synchrony Financial | IPO [Member] | ||||||
| Subsidiary, Sale of Stock [Line Items] | ||||||
| Sale of Stock, Number of Shares Issued in Transaction | 3,500,000 | 125,000,000 | ||||
| Sale of Stock, Price Per Share | $ 23 | |||||