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Executive Stock Plans And Stock-Based Compensation (Summary Of Stock Option And SAR Activity) (Details) shares in Thousands | 12 Months Ended
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Mar. 31, 2017 $ / shares shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Outstanding at beginning of year, Weighted-Average Exercise Price | $ / shares | $ 59.96
Outstanding at beginning of year, Shares | shares | 152,201
Exercised, Shares | shares | (135,334)
Cancelled/expired, Shares | shares | (16,867)
Outstanding at end of year, Shares | shares | 0
Exercised, Weighted-Average Exercise Price | $ / shares | $ 61.72
Cancelled/expired, Weighted-Average Exercise Price | $ / shares | 45.82
Outstanding at end of year, Weighted-Average Exercise Price | $ / shares | $ 0

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