Accounting for Share-Based Compensation 4 (Details) - $ / shares shares in Millions		3 Months Ended
		Jun. 30, 2015	Jun. 30, 2014
Restricted Stock Awards (RSAs)
Summary of PSUs granted under long-term incentive plans
Shares		2.7	2.9
Weighted average grant date fair value (in dollars per share)	[1]	$ 30.65	$ 28.96
Restricted Stock Units (RSUs)
Summary of PSUs granted under long-term incentive plans
Shares		0.8	0.8
Weighted average grant date fair value (in dollars per share)	[2]	$ 28.90	$ 26.92
Fiscal Year 2015 Incentive Plan Year
Summary of PSUs granted under long-term incentive plans
Performance period (in years)		1 year
Fiscal Year 2015 Incentive Plan Year | Restricted Stock Awards (RSAs)
Summary of PSUs granted under long-term incentive plans
Shares		0.5
Weighted average grant date fair value (in dollars per share)		$ 31.41
Fiscal Year 2015 Incentive Plan Year | Restricted Stock Units (RSUs)
Summary of PSUs granted under long-term incentive plans
Shares		0.1
Weighted average grant date fair value (in dollars per share)		$ 30.42
Fiscal Year 2014 Incentive Plan Year
Summary of PSUs granted under long-term incentive plans
Performance period (in years)			1 year
Fiscal Year 2014 Incentive Plan Year | Restricted Stock Awards (RSAs)
Summary of PSUs granted under long-term incentive plans
Shares			0.7
Weighted average grant date fair value (in dollars per share)			$ 29.91
Fiscal Year 2014 Incentive Plan Year | Restricted Stock Units (RSUs)
Summary of PSUs granted under long-term incentive plans
Shares			0.1
Weighted average grant date fair value (in dollars per share)			$ 28.92
Fiscal Year 2013 Incentive Plan Year
Summary of PSUs granted under long-term incentive plans
Performance period (in years)		3 years
Shares		0.1
Weighted average grant date fair value (in dollars per share)		$ 31.41
Fiscal Year 2015 Sales Retention Equity Program
Summary of PSUs granted under long-term incentive plans
Performance period (in years)		1 year
Fiscal Year 2015 Sales Retention Equity Program | Restricted Stock Awards (RSAs)
Summary of PSUs granted under long-term incentive plans
Shares		0.2
Weighted average grant date fair value (in dollars per share)		$ 30.45
Fiscal Year 2015 Sales Retention Equity Program | Restricted Stock Units (RSUs)
Summary of PSUs granted under long-term incentive plans
Shares		0.1
Weighted average grant date fair value (in dollars per share)		$ 27.50
Fiscal Year 2014 Sales Retention Equity Program
Summary of PSUs granted under long-term incentive plans
Performance period (in years)			1 year
Fiscal Year 2014 Sales Retention Equity Program | Restricted Stock Awards (RSAs)
Summary of PSUs granted under long-term incentive plans
Shares			0.2
Weighted average grant date fair value (in dollars per share)			$ 28.69
Fiscal Year 2014 Sales Retention Equity Program | Restricted Stock Units (RSUs)
Summary of PSUs granted under long-term incentive plans
Shares			0.1
Weighted average grant date fair value (in dollars per share)			$ 25.73

[1] The fair value is based on the quoted market value of the Company’s common stock on the grant date.

[2] The fair value is based on the quoted market value of the Company’s common stock on the grant date reduced by the present value of dividends expected to be paid on the Company’s common stock prior to vesting of the RSUs, which is calculated using a risk-free interest rate.