Stock Plans 9 (Details) - $ / shares shares in Millions	3 Months Ended			12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Restricted Stock Awards (RSAs)
Summary of PSUs granted under long-term incentive plans
Shares				2.8	3.1	2.7
Weighted average grant date fair value (in dollars per share)				$ 30.59	$ 28.97	$ 27.06
Restricted Stock Units (RSUs)
Summary of PSUs granted under long-term incentive plans
Shares				0.9	0.8	0.7
Weighted average grant date fair value (in dollars per share)				$ 28.72	$ 26.99	$ 25.45
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		1 year
Shares	0.1
Weighted average grant date fair value (in dollars per share)	$ 31.41
Fiscal Year 2013 Incentive Plan Year | Restricted Stock Awards (RSAs)
Summary of PSUs granted under long-term incentive plans
Shares			0.4
Weighted average grant date fair value (in dollars per share)			$ 27.11
Fiscal Year 2013 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)			$ 26.12
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
Fiscal Year 2013 Sales Retention Equity Program
Summary of PSUs granted under long-term incentive plans
Performance period (in years)			1 year
Fiscal Year 2013 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)			$ 27.11
Fiscal Year 2013 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)			$ 24.13