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Organization and Significant Accounting Policies (Tables)
 12 Months Ended
Mar. 31, 2022
Accounting Policies [Abstract]  
Property, Plant and Equipment Estimated Useful Lives Depreciation of property, plant and equipment is computed using the straight-line method over the following estimated useful lives: 
  Years
Buildings
10 to 50
Buildings Improvements
1 to 40
Leasehold Improvements
1 to 40
Machinery and Equipment
1 to 30
Basic and Dilutive Common Shares Outstanding Used in Determining Net Income Per Share
Basic and dilutive common shares outstanding used in determining net income per share are as follows:
 Years Ended 31 March
(Millions of shares)202220212020
Basic common shares outstanding444.9 443.7 442.6 
Dilutive effect of stock awards1.0 1.7 1.5 
Diluted common shares outstanding445.9 445.4 444.1