Investments (Number of Securities Included in Loss Position of Current and Noncurrent Investments) (Details)	Jun. 30, 2014 Securities
Current [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months	86
12 Months or More	278
Total, number of securities	364
Current [Member] | Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months	19
12 Months or More	58
Total, number of securities	77
Current [Member] | Obligations of States and Other Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months	26
12 Months or More	129
Total, number of securities	155
Current [Member] | Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months	41
12 Months or More	91
Total, number of securities	132
Noncurrent [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months	0
12 Months or More	1
Total, number of securities	1
Noncurrent [Member] | Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months	0
12 Months or More	1
Total, number of securities	1