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Equity- (Narrative) (Details) (USD $)
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0 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 1 Months Ended | 3 Months Ended | 6 Months Ended | 0 Months Ended | 3 Months Ended | 6 Months Ended | 6 Months Ended | 6 Months Ended | 1 Months Ended | ||||||||
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Nov. 13, 2013
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Jun. 30, 2014
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Jun. 30, 2013
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Jun. 30, 2014
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Jun. 30, 2013
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Dec. 31, 2013
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Jul. 31, 2014
Subsequent Event [Member]
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Jun. 30, 2014
Employee Stock Option [Member]
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Jun. 30, 2013
Employee Stock Option [Member]
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Jun. 30, 2014
Employee Stock Option [Member]
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Jun. 30, 2013
Employee Stock Option [Member]
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Jun. 30, 2014
Time Based And Performance Based Restricted Stock [Member]
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Feb. 27, 2014
Performance Based Restricted Stock Units [Member]
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Jun. 30, 2014
Performance Based Restricted Stock Units [Member]
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Jun. 30, 2014
Performance Based Restricted Stock Units [Member]
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Feb. 28, 2014
Performance Based Restricted Stock Units [Member]
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Jun. 30, 2014
Performance Based Restricted Stock Units [Member]
Minimum [Member]
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Jun. 30, 2014
Performance Based Restricted Stock Units [Member]
Maximum [Member]
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Feb. 27, 2014
Performance Based Restricted Stock Units [Member]
Maximum [Member]
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Jun. 30, 2014
Securities and Exchange Commission Rule 10b5-1 Trading Plan [Member]
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Aug. 04, 2014
Securities and Exchange Commission Rule 10b5-1 Trading Plan [Member]
Subsequent Event [Member]
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| Class of Stock [Line Items] | |||||||||||||||||||||
| Share-based Compensation, Excluding Mergers and Acquisition and and Capitalized Portion | $ 22,000,000 | $ 15,000,000 | $ 39,000,000 | $ 30,000,000 | |||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate | 0.00% | 1.26% | 0.00% | ||||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value | 87,000,000 | 53,000,000 | |||||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | 625,413 | 175,655 | |||||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value | 11,000,000 | 6,000,000 | 23,000,000 | 13,000,000 | |||||||||||||||||
| Granted, Number of options | 154,202 | ||||||||||||||||||||
| Stock-based compensation | 49,000,000 | 30,000,000 | 5,000,000 | 7,000,000 | |||||||||||||||||
| Tax benefits from stock option plans | 18,000,000 | 8,000,000 | |||||||||||||||||||
| Excess tax benefits from stock-based compensation | 18,000,000 | 5,000,000 | |||||||||||||||||||
| Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | 9,000,000 | 9,000,000 | 129,000,000 | 35,000,000 | 28,000,000 | 28,000,000 | 71,000,000 | ||||||||||||||
| Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition | 2 years 1 month 6 days | 2 years 3 months 6 days | 3 years | ||||||||||||||||||
| Number of Options, Exercised | 642,627 | 642,627 | |||||||||||||||||||
| Weighted Average Exercise Price, Exercised | $ 107.94 | $ 107.94 | |||||||||||||||||||
| Share Based Compensation Arrangement By Share Based Payment Shares Reserved For Future Issuance | 351,310 | ||||||||||||||||||||
| Reduction of Shares, Granted, Target Performance Level Not Met | 10.00% | 20.00% | |||||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value | $ 180.31 | $ 180.31 | $ 147.00 | ||||||||||||||||||
| Share Based Estimated Compensation Expense Stock Options Remainder Of Current Fiscal Year | 11,000,000 | ||||||||||||||||||||
| Stock Repurchase Program, Remaining Authorized Repurchase Amount | 450,000,000 | ||||||||||||||||||||
| Stock Repurchase Program, Authorized Amount | 1,050,000,000 | 450,000,000 | |||||||||||||||||||
| Stock Repurchase Program, Increase In Authorized Amount | 600,000,000 | ||||||||||||||||||||
| Stock Repurchased During Period, Shares | 1,800,000 | ||||||||||||||||||||
| Stock Repurchased During Period, Value | $ 350,000,000 | ||||||||||||||||||||