XML 57 R34.htm IDEA: XBRL DOCUMENT v2.4.0.8
3. Available-for-Sale Investments (Details) (Fair Value, Measurements, Recurring [Member], USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost $ 326.1 $ 327.2
Unrealized Gains 285.8 244.6
Unrealized Losses (0.5) (0.9)
Estimated Fair Value 611.4 570.9
Other Long-term Investments [Member] | Asset-backed Securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 0.4 0.4
Unrealized Gains 0 0
Unrealized Losses (0.1) (0.1)
Estimated Fair Value 0.3 0.3
Other Long-term Investments [Member] | Marketable Equity Securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 54.5 54.5
Unrealized Gains 279.8 238.7
Unrealized Losses 0 0
Estimated Fair Value 334.3 293.2
Other Long-term Investments [Member] | Available-for-sale Securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 54.9 54.9
Unrealized Gains 279.8 238.7
Unrealized Losses (0.1) (0.1)
Estimated Fair Value 334.6 293.5
Short-term Investments [Member] | Corporate Debt Securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 134.3 132.6
Unrealized Gains 0.4 0.3
Unrealized Losses (0.2) (0.4)
Estimated Fair Value 134.5 132.5
Short-term Investments [Member] | Foreign Brokered Certificates of Deposit [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 5.1 8.9
Unrealized Gains 0 0
Unrealized Losses 0 0
Estimated Fair Value 5.1 8.9
Short-term Investments [Member] | Municipal obligations [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 10.3 11.1
Unrealized Gains 0 0
Unrealized Losses (0.1) (0.1)
Estimated Fair Value 10.2 11.0
Short-term Investments [Member] | Asset-backed Securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 50.4 48.4
Unrealized Gains 0 0.1
Unrealized Losses (0.1) (0.2)
Estimated Fair Value 50.3 48.3
Short-term Investments [Member] | Marketable Equity Securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 26.6 26.6
Unrealized Gains 5.6 5.4
Unrealized Losses 0 0
Estimated Fair Value 32.2 32.0
Short-term Investments [Member] | Available-for-sale Securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 271.2 272.3
Unrealized Gains 6.0 5.9
Unrealized Losses (0.4) (0.8)
Estimated Fair Value 276.8 277.4
Short-term Investments [Member] | US Government Sponsored Agencies [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 41.3 39.1
Unrealized Gains 0 0.1
Unrealized Losses 0 (0.1)
Estimated Fair Value 41.3 39.1
Short-term Investments [Member] | Foreign Government Obligations [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 3.2 5.6
Unrealized Gains 0 0
Unrealized Losses 0 0
Estimated Fair Value 3.2 5.6
Estimate of Fair Value, Fair Value Disclosure [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Estimated Fair Value 611.4 [1] 570.9 [1]
Estimate of Fair Value, Fair Value Disclosure [Member] | Corporate Debt Securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Estimated Fair Value 134.5 [1] 132.5 [1]
Estimate of Fair Value, Fair Value Disclosure [Member] | Foreign Brokered Certificates of Deposit [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Estimated Fair Value 5.1 [1] 8.9 [1]
Estimate of Fair Value, Fair Value Disclosure [Member] | Municipal obligations [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Estimated Fair Value 10.2 [1] 11.0 [1]
Estimate of Fair Value, Fair Value Disclosure [Member] | Asset-backed Securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Estimated Fair Value 50.6 [1] 48.6 [1]
Estimate of Fair Value, Fair Value Disclosure [Member] | Marketable Equity Securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Estimated Fair Value 366.5 [1] 325.2 [1]
Estimate of Fair Value, Fair Value Disclosure [Member] | US Government Sponsored Agencies [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Estimated Fair Value 41.3 [1] 39.1 [1]
Estimate of Fair Value, Fair Value Disclosure [Member] | Foreign Government Obligations [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Estimated Fair Value 3.2 [1] 5.6 [1]
Estimate of Fair Value, Fair Value Disclosure [Member] | Short-term Investments [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Estimated Fair Value $ 276.8 $ 277.4
[1] Available-for-sale investments are included in the following accounts in the Condensed Consolidated Balance Sheets (in millions): March 31, 2014 December 31, 2013Short-term investments$276.8 $277.4Other investments334.6 293.5Total$611.4 $570.9