Equity (Details of Stock Options) (Details) - Jun. 30, 2015 - USD ($) $ / shares in Units, $ in Millions	Total
Equity [Abstract]
Number of Options, Vested or expected to vest	839,532
Weighted Average Exercise Price, Vested or expected to vest	$ 156.01
Weighted Average Remaining Contractual Life, Vested or expected to vest	6 years 7 months 6 days
Aggregate Intrinsic Value, Vested or expected to vest	$ 57
Number of Options, Exercised	556,509
Weighted Average Exercise Price, Exercised	$ 133.61
Weighted Average Remaining Contractual Life, Exercised	5 years 3 months 6 days
Aggregate Intrinsic Value, Exercised	$ 50