Income Taxes Disclosure of Tax Rates (Details 3)	12 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Mar. 31, 2012
Reconciliation of Tax Rates [Line Items]
Tax provision (benefit) at statutory U.S. federal income tax rate	35.00%		(35.00%)		35.00%
State income taxes, net of federal income tax benefit	1.80%	[1]	1.50%	[1]	5.40%	[1]
Effect of foreign tax rates	(4.20%)	[1]	3.80%	[1]	(1.80%)	[1]
Effect of loss on Australian restructuring	0.00%		0.00%		(6.00%)
Changes in U.K. tax rates on deferred tax assets and liabilities	(4.60%)		(3.50%)		(6.00%)
Net (income) loss attributable to noncontrolling interests	0.30%		0.50%		(0.80%)
Other, net	4.50%	[1]	3.20%	[1]	(2.00%)	[1]
Effective income tax provision (benefit) rate	32.80%		(29.50%)		23.80%

[1] State income taxes include changes in related valuation allowances, net of the impact on deferred tax assets of changes in state apportionment factors and planning strategies. The effect of foreign tax rates also includes changes in related valuation allowances. Other includes changes in federal valuation allowances and permanent tax adjustments. See schedule below for the change in valuation allowances by jurisdiction.