Hedging Activities (Narrative) (Details) (USD $)	9 Months Ended	3 Months Ended		9 Months Ended
	Dec. 31, 2013 Designated as Hedging Instrument [Member]	Dec. 31, 2013 Designated as Hedging Instrument [Member] Fair Value, Inputs, Level 2 [Member] Canada, Dollars	Dec. 31, 2012 Designated as Hedging Instrument [Member] Fair Value, Inputs, Level 2 [Member] Canada, Dollars	Dec. 31, 2013 Designated as Hedging Instrument [Member] Fair Value, Inputs, Level 2 [Member] Canada, Dollars	Dec. 31, 2012 Designated as Hedging Instrument [Member] Fair Value, Inputs, Level 2 [Member] Canada, Dollars	Mar. 31, 2013 Designated as Hedging Instrument [Member] Fair Value, Inputs, Level 2 [Member] Canada, Dollars	Dec. 31, 2013 Not Designated as Hedging Instrument [Member] Fair Value, Inputs, Level 2 [Member] Canada, Dollars	Mar. 31, 2013 Not Designated as Hedging Instrument [Member] Fair Value, Inputs, Level 2 [Member] Canada, Dollars	Dec. 31, 2012 Not Designated as Hedging Instrument [Member] Fair Value, Inputs, Level 2 [Member] Canada, Dollars	Jun. 30, 2012 Not Designated as Hedging Instrument [Member] Fair Value, Inputs, Level 2 [Member] United Kingdom, Pounds	Sep. 30, 2013 Not Designated as Hedging Instrument [Member] Fair Value, Inputs, Level 2 [Member] Mexico, Pesos
Derivative [Line Items]
Notional Amount of Foreign Currency Derivatives		$ 503,000,000		$ 503,000,000		$ 503,000,000	$ 90,000,000	$ 172,000,000	$ 177,000,000	$ 151,000,000	$ 41,000,000
Derivative, Remaining Maturity	8 years
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net		$ 0	$ 0	$ 0	$ 0