XML 47 R35.htm IDEA: XBRL DOCUMENT v3.7.0.1
3. Available-for-Sale Investments (Details) - Fair Value, Measurements, Recurring [Member] - USD ($)
$ in Millions
Jun. 30, 2017
Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost $ 439.5 $ 435.7
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 894.0 681.7
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax (1.1) (1.8)
Estimated Fair Value [1] 1,332.4 1,115.6
Corporate Debt Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Estimated Fair Value [1] 201.7 179.4
Brokered certificates of deposit [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Estimated Fair Value [1] 3.6 3.6
Municipal obligations [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Estimated Fair Value [1] 13.8 15.4
Asset-backed Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Estimated Fair Value [1] 58.1 62.5
Marketable Equity Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Estimated Fair Value [1] 980.1 767.8
US Government Sponsored Agencies [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Estimated Fair Value [1] 72.1 82.5
Foreign Government Obligations [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Estimated Fair Value [1] 3.0 4.4
Other Long-term Investments [Member] | Asset-backed Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 0.2 0.3
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 0.0 0.0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax 0.0 0.0
Estimated Fair Value 0.2 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
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 886.4 677.6
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax 0.0 0.0
Estimated Fair Value 940.9 732.1
Other Long-term Investments [Member] | Available-for-sale Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 54.7 54.8
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 886.4 677.6
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax 0.0 0.0
Estimated Fair Value 941.1 732.4
Short-term Investments [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Estimated Fair Value 391.3 383.2
Short-term Investments [Member] | Corporate Debt Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 201.6 179.7
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 0.4 0.2
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax (0.3) (0.5)
Estimated Fair Value 201.7 179.4
Short-term Investments [Member] | Brokered certificates of deposit [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 3.6 3.6
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 0.0 0.0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax 0.0 0.0
Estimated Fair Value 3.6 3.6
Short-term Investments [Member] | Municipal obligations [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 13.8 15.5
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 0.0 0.0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax 0.0 (0.1)
Estimated Fair Value 13.8 15.4
Short-term Investments [Member] | Asset-backed Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 57.9 62.2
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 0.1 0.1
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax (0.1) (0.1)
Estimated Fair Value 57.9 62.2
Short-term Investments [Member] | Marketable Equity Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 32.5 32.4
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 7.0 3.7
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax (0.3) (0.4)
Estimated Fair Value 39.2 35.7
Short-term Investments [Member] | Available-for-sale Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 384.8 380.9
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 7.6 4.1
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax (1.1) (1.8)
Estimated Fair Value 391.3 383.2
Short-term Investments [Member] | US Government Sponsored Agencies [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 72.4 83.1
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 0.1 0.1
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax (0.4) (0.7)
Estimated Fair Value 72.1 82.5
Short-term Investments [Member] | Foreign Government Obligations [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 3.0 4.4
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 0.0 0.0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax 0.0 0.0
Estimated Fair Value $ 3.0 $ 4.4
[1] Available-for-sale investments are included in the following accounts in the Condensed Consolidated Balance Sheets (in millions):
 
June 30,
2017
 
December 31, 2016
Short-term investments
$
391.3

 
$
383.2

Other investments
941.1

 
732.4

Total
$
1,332.4

 
$
1,115.6