Financial Instruments - Summarization for Foreign Currency Forward Purchase and Sale Contracts (Details) - Jun. 30, 2015 - Foreign Exchange Forward Contracts [Member] € in Millions, ¥ in Millions, £ in Millions, ZAR in Millions, CAD in Millions, AUD in Millions, $ in Millions	JPY (¥)	CAD	GBP (£)	AUD	USD ($)	ZAR	EUR (€)
Australia, Dollars | Long [Member]
Derivative [Line Items]
Notional Amount in Foreign Currency | AUD				AUD 1
Australia, Dollars | Short [Member]
Derivative [Line Items]
Notional Amount in Foreign Currency | £			£ (1)
United Kingdom, Pounds | Long [Member]
Derivative [Line Items]
Notional Amount in Foreign Currency | £			10
United Kingdom, Pounds | Short [Member]
Derivative [Line Items]
Notional Amount in Foreign Currency | £			£ (25)
Canada, Dollars | Short [Member]
Derivative [Line Items]
Notional Amount in Foreign Currency | CAD		CAD (6)
Euro Member Countries, Euro | Long [Member]
Derivative [Line Items]
Notional Amount in Foreign Currency | €							€ 7
Euro Member Countries, Euro | Short [Member]
Derivative [Line Items]
Notional Amount in Foreign Currency | €							€ (10)
South Africa, Rand | Long [Member]
Derivative [Line Items]
Notional Amount in Foreign Currency | ZAR						ZAR 112
Japan, Yen | Long [Member]
Derivative [Line Items]
Notional Amount in Foreign Currency | ¥	¥ 228
Japan, Yen | Short [Member]
Derivative [Line Items]
Notional Amount in Foreign Currency | ¥	¥ (604)
United States of America, Dollars | Long [Member]
Derivative [Line Items]
Notional Amount in Foreign Currency					$ 60
United States of America, Dollars | Short [Member]
Derivative [Line Items]
Notional Amount in Foreign Currency					(35)
Other Currency [Member] | Long [Member]
Derivative [Line Items]
Notional Amount in Foreign Currency					$ 1